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Preprint ARTICLE | doi:10.20944/preprints202202.0002.v1

15-Year Analysis of Direct Effects of Total and Dust Aerosols in Solar Radiation/Energy Over the Mediterranean Basin

Kyriakoula Papachristopoulou, Ilias Fountoulakis, Antonis Gkikas, Panagiotis G. Kosmopoulos, Panagiotis T. Nastos, Maria Hatzaki, Stelios Kazadzis

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: aerosols; dust; direct radiative effects; solar energy; Mediterranean basin

Online: 1 February 2022 (10:58:53 CET)

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Preprint ARTICLE | doi:10.20944/preprints202408.2086.v1

Unique Features of Extremely Halophilic Microbiota Inhabiting Solar Saltwork Fields of Vietnam

Violetta La Cono, Gina La Spada, Francesco Smedile, Francesca Crisafi, Laura Marturano, Alfonso Modica, Huynh Hoang Nhu Khanh, Pham Duc Thinh, Cao Thi Thuy Hang, Elena A. Selivanova, Ninh Khắc Bản, Michail M. Yakimov

Subject: Environmental And Earth Sciences, Environmental Science Keywords: extreme halophiles; solar saltern; microbiota; CPR bacteria; DPANN archaea

Online: 28 August 2024 (14:44:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.0679.v1

Developing Prediction Models for Solar Photovoltaic Energy Generation Using GBM

Yoo-Jung Kim, Na-Hyeong Kim, So-Yeon Park, Jin-Young Kim, Chang-Ki Kim, Myeong-Chan Oh, Hyun-Goo Kim, Yung-Seop Lee

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: renewable energy; solar photovoltaic energy generation; prediction; gradient boosting machine (GBM); gradient boosting regressor (GBR), time series analysis; autoregressive integrated moving average (ARIMA); normalized mean absolute error (nMAE)

Online: 9 June 2023 (07:20:58 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0192.v1

Film Properties Using Metal Salts Washing for Perovskite Solar Cells

Ankit Stephen Thomas

Subject: Chemistry And Materials Science, Surfaces, Coatings And Films Keywords: Perovskites; Solar cells; Film formation; Solar energy; Doping

Online: 13 July 2022 (08:40:00 CEST)

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Preprint REVIEW | doi:10.20944/preprints201811.0625.v1

Encapsulation of Organic and Perovskite Solar Cells: A Comprehensive Review

Ashraf Uddin, Mushfika Baishakhi Upama, Haimang Yi, Leiping Duan

Subject: Physical Sciences, Chemical Physics Keywords: organic solar cells; perovskite solar cells; encapsulation; stability

Online: 30 November 2018 (09:38:24 CET)

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Preprint ARTICLE | doi:10.20944/preprints202312.1971.v1

Harvesting Renewable Energy to Supply Power for Electric Buses

Shwan Hussein Awla, Simon Philbin

Subject: Engineering, Energy And Fuel Technology Keywords: Renewable Energy Technologies; Solar Modules; Wind Turbines; Piezoelectric Materials; Electric Buses; Energy Efficiency; Urban Public Transportation; Techno-Economic Analysis; Environmental Sustainability; Charging Infrastructure Reduction

Online: 27 December 2023 (01:47:42 CET)

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Preprint ARTICLE | doi:10.20944/preprints202008.0162.v2

Efficiency of Selective Solar Absorber in High Vacuum Flat Solar Thermal Panels: The Role of Emissivity

Davide De Maio, Carmine D'Alessandro, Antonio Caldarelli, Marilena Musto, Daniela De Luca, Emiliano Di Gennaro, Roberto Russo

Subject: Engineering, Energy And Fuel Technology Keywords: thermal emittance; conversion efficiency; selective solar absorber; thermal energy; evacuated flat panel; solar energy

Online: 20 October 2020 (12:18:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0345.v1

SENERGY: A Novel Deep Learning-Based Auto-Selective Approach and Tool for Solar Energy Forecasting

Ghadah Alkhayat, Syed Hamid Hasan, Rashid Mehmood

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Deep learning; solar radiation forecasting; model prediction; solar energy; multi climates data; generalizability; sustainability; Long Short-Term Memory (LSTM); Gated Recurrent Unit (GRU); Convolutional Neural Network (CNN); Hybrid CNN-Bidirectional LSTM; LSTM Autoencoder

Online: 18 August 2022 (10:59:18 CEST)

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The sustainability of the planet and its inhabitants is in dire danger and is among the highest priorities on global agendas such as the Sustainable Development Goals (SDGs) of the United Nations (UN). Solar energy -- among other clean, renewable, and sustainable energies -- is seen as essential for environmental, social, and economic sustainability. Predicting solar energy accurately is critical to increasing reliability and stability, and reducing the risks and costs of the energy systems and markets. Researchers have come a long way in developing cutting-edge solar energy forecasting methods. However, these methods are far from optimal in terms of their accuracies, generalizability, benchmarking, and other requirements. Particularly, no single method performs well across all climates and weathers due to the large variations in meteorological data. This paper proposes SENERGY (an acronym for Sustainable Energy), a novel deep learning-based auto-selective approach and tool that, instead of generalising a specific model for all climates, predicts the best performing deep learning model for GHI forecasting in terms of forecasting error. The approach is based on carefully devised deep learning methods and feature sets through an extensive analysis of deep learning forecasting and classification methods using ten meteorological datasets from three continents. We analyse the tool in great detail through a range of metrics and methods for performance analysis, visualization, and comparison of solar forecasting methods. SENERGY outperforms existing methods in all performance metrics including Root Mean Square Error (RMSE), Mean Absolute Error (MAE), Mean Absolute Percentage Error (MAPE), Forecast Skills (FS), Relative Forecasting Error, and the normalised versions of these metrics. The proposed auto-selective approach can be extended to other research problems such as wind energy forecasting and predict forecasting models based on different criteria (in addition to the minimum forecasting error used in this paper) such as the energy required or speed of model execution, different input features, different optimisations of the same models, or other user preferences.

Preprint ARTICLE | doi:10.20944/preprints202102.0451.v1

New Concept Note on Affordable Efficient Energy Utilization with Right Selection of Reliable Solar Converters for Household Loads

Richa Parmar, Dr. Chandan Banerjee, Mr. Ganesh Gowri

Subject: Engineering, Electrical And Electronic Engineering Keywords: DC-DC Converter, DC-AC Converter, Solar Photovoltaic, Efficiency, Cost Analysis.

Online: 22 February 2021 (09:05:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202211.0405.v1

Deployment of Solar Energy at the Expense of Conservation Sensitive Areas Precludes its Classification as an Environmentally Sustainable Activity

Francisco Valera, Luis Bolonio, Abel La Calle, Eulalia Moreno

Subject: Environmental And Earth Sciences, Environmental Science Keywords: sustainability; solar energy; land-use; Taxonomy regulation; territorial planning; biodiversity

Online: 22 November 2022 (04:05:51 CET)

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Preprint ARTICLE | doi:10.20944/preprints201806.0324.v1

Evaluating the Impacts of Ground and Atmospheric Conditions on the Efficiency of Solar Energy System and Its Economic Analysis

Ali Saleh Aziz, Mohammad Faridun Naim Tajuddin, Sanjeevikumar Padmanaban, Lucian Mihet-Popa, Mohd Rafi Adzman, Makbul A. M. Ramli

Subject: Engineering, Electrical And Electronic Engineering Keywords: Renewable Energy; solar energy; PV panels slope; azimuth; temperature; albedo

Online: 20 June 2018 (14:22:44 CEST)

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The There are many factors influencing the performance of photovoltaic (PV) systems. Among these factors, temperature and solar radiation are two major parameters that have a large effect on the efficiency of PV systems. The cell temperature of PV panels is related to the ambient temperature while the solar radiation incident on the surface of the PV modules depends on the slope and azimuth of these modules. Furthermore, ground reflectance (albedo) affects the irradiance incident on the PV panel surface, which in turn affects the output of a PV system. Nevertheless, the effects of these factors on the economic performance of the solar PV systems are scarcely reported. This paper presents a complete design of a stand-alone PV/battery system to supply electric power for a mobile base station in Choman, Erbil, Iraq. The effects of different factors on the total electricity produced by PV arrays and its economic performance are simultaneously investigated. HOMER software has been used as a tool for the techno-economic and environmental analysis. As indicated from the simulation results, the PV array capacity and its economic performance are highly affected by the variation of the slope and azimuth. With a base case (albedo of 20% and average annual ambient temperature of 11°C), the best feasible system which is achieved by facing PV due to south with a tilt angle of 40° or 45°, is found to have net present cost (NPC) of 70595 $ and cost of energy (COE) of 0.54 $/kWh. Moreover, the results indicate that increasing the ground reflectance from 10% to 90% results in a 7.2% decrease in the PV array capacity and about 3% decrease in the NPC and COE. On the other hand, increasing the ambient temperature from 0°C to 40°C results in a 19.7% increase in the PV array capacity and an 8.2% increase in the NPC and COE. Furthermore, according to the ambient temperature of Choman, using PV modules with high sensitivity to temperature is found to be an attractive option. Provided simulation performance analysis proves that the studied parameters must be treated well to establish an enabling environment for solar energy development in Iraq.

Preprint ARTICLE | doi:10.20944/preprints202008.0674.v1

Design and Programming of a Micro-Controller-Based Solar Tracking System

Saman Sarkawt Jaafar, Farhad Muhsin Mahmood

Subject: Engineering, Energy And Fuel Technology Keywords: Solar cell energy; Single Axial Solar Tracking System; Solar cell efficiency; Arduino Uno Board

Online: 30 August 2020 (15:34:39 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.1483.v1

Multi-Objective Optimization of a Solar-Assisted Combined Cooling, Heating and Power Generation System Using the Greywolf Optimizer

Uchechi Ukaegbu, Lagouge Tartibu, C.W Lim

Subject: Engineering, Mechanical Engineering Keywords: tri-generation systems; CCHP; greywolf optimization; solar photovoltaic thermal collectors; net power; exergy efficiency; CO2 emission

Online: 22 August 2023 (09:56:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202209.0174.v1

Open-source Photovoltaic - Electrical Vehicle Carport Designs

Nicholas Vandewetering, Koami Soulemane Hayibo, Joshua M. Pearce

Subject: Engineering, Civil Engineering Keywords: open-source; photovoltaic; mechanical design; electric vehicle; solar energy; solar carport; electric vehicle charging station

Online: 13 September 2022 (10:41:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0994.v1

Solar Energy Production Forecasting: A Comparative Study of Bi-LSTM, LSTM, XGBoost Models with Activation Function Analysis

Hamed Alizadegan, Arian Radmehr, Hossein Karimi, Mohsen Asghari Ilani

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Time series forecasting; LSTM; Bi-LSTM; Deep learning; ML; XGBoost; Energy; Solar Energy

Online: 15 May 2024 (10:22:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0452.v1

Solar Neutrinos Spectroscopy with Borexino Phase-II

Lino Miramonti, M. Agostini, K. Altenmueller, S. Appel, V. Atroshchenko, Z. Bagdasarian, D. Basilico, G. Bellini, J. Benziger, D. Bick, I. Bolognino, G. Bonfini, D. Bravo, B. Caccianiga, F. Calaprice, A. Caminata, S. Caprioli, M. Carlini, P. Cavalcante, F. Cavanna, A. Chepurnov, K. Choi, L. Collica, S. Davini, A. Derbin, X.F. Ding, A. Di Ludovico, L. Di Noto, I. Drachnev, K. Fomenko, A. Formozov, D. Franco, F. Gabriele, C. Galbiati, M. Gschwender, C. Ghiano, M. Giammarchi, A. Goretti, M. Gromov, D. Guffanti, C. Hagner, T. Houdy, E. Hungerford, Aldo Ianni, Andrea Ianni, A. Jany, D. Jeschke, V. Kobychev, D. Korablev, G. Korga, T. Lachenmaier, M. Laubenstein, E. Litvinovich, F. Lombardi, P. Lombardi, L. Ludhova, G. Lukyanchenko, L. Lukyanchenko, I. Machulin, G. Manuzio, S. Marcocci, J. Maricic, J. Martyn, E. Meroni, M. Meyer, M. Misiaszek, L. Papp, O. Penek, L. Pietrofaccia, N. Pilipenko, A. Pocar, A. Porcelli, G. Raikov, G. Ranucci, A. Razeto, A. Re, M. Redchuk, A. Romani, N. Rossi, S. Rottenanger, S. Schönert, D. Semenov, M. Skorokhvatov, O. Smirnov, A. Sotnikov, L.F.F. Stokes, Y. Suvorov, R. Tartaglia, G. Testera, J. Thurn, M. Toropova, E. Unzhakov, A. Vishneva, R.B. Vogelaar, F. von Feilitzsch, S. Weinz, M. Wojcik, M. Wurm, Z. Yokley, O. Zaimidoroga, S. Zavatarelli, K. Zuber, G. Zuzel

Subject: Physical Sciences, Particle And Field Physics Keywords: solar neutrinos; neutrino oscillation; Borexino

Online: 19 October 2018 (11:49:06 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints201812.0297.v1

The Correlation and Causality Research between Baidu Index and Stock price: An Empirical Study in China Solar Energy Industry

Jian Huang, Yingqi Zeng, Siyan Chen, Shuhui Tang, Xueting Gong, Chengyu Li

Subject: Social Sciences, Psychology Keywords: Baidu index; media index; Hexun index; solar power industry; close price

Online: 25 December 2018 (08:39:05 CET)

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Preprint ARTICLE | doi:10.20944/preprints201711.0158.v1

Solar Ray Tracing Analysis to Determine Energy Availability in a CPC Designed for Use as a Residential Water Heater

Miguel Terrón-Hernández, Manuel I. Peña-Cruz, J. G. Carrillo, Ulises Diego-Ayala, Vicente Flores

Subject: Engineering, Energy And Fuel Technology Keywords: ray tracing analysis; compound parabolic concentrator; solar water heating; photonics; optics

Online: 24 November 2017 (05:28:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints202304.0481.v1

Experimental and Numerical Optimization Study on Performance of Solar Phase Change Thermal Energy Storage System

Yuqing Tang, Neng Zhu, Siqi Li, Yingzhen Hou

Subject: Engineering, Civil Engineering Keywords: phase change thermal energy storage device; solar energy; heat storage and release performance; experimental study; numerical simulation

Online: 18 April 2023 (04:20:30 CEST)

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Promoting the use of solar energy resources has always faced the challenges of instability and supply-demand mismatch. The key to solving these issues is to efficiently store and utilize solar energy resources using high-performance heat storage devices. This study designed a high-performance shell-and-tube phase change thermal storage device and established a numerical model using ANSYS software to summarize the device's dynamic melting law. To verify the accuracy of the numerical simulation, a performance testing platform for the phase change thermal storage device was built to investigate the impact of factors such as inlet water temperature, inlet water flow rate, type of heat storage, and initial temperature of the device, and to reveal the change law of the device's performance. The results show that the inlet water temperature has the most significant impact on the device's heat storage and release performance. When the device's heat storage or release is used for heating, changing the inlet water flow rate has a weak and limited effect on the device's performance. However, when the device's heat release is used to provide domestic hot water, increasing the makeup water temperature and reducing the inlet water flow rate can significantly improve the device's effective heat release. Furthermore, based on the experimental validation of the model's correctness, this study further simulated and studied the impact of different factors on the device's heat storage process to optimize its structural design and provide technical references for the device's actual operation and installation. The results show that the placement of fins has a negligible effect on the performance of the heat storage device while reducing the fin spacing and increasing the fin thickness can significantly improve the melting efficiency of the phase change material (PCM). Additionally, the heat storage characteristics of the device are significantly better in the vertical installation mode than in the horizontal installation mode. This study provides theoretical guidance and technical references for the design and use of phase change thermal storage devices.

Preprint DATA DESCRIPTOR | doi:10.20944/preprints201811.0120.v2

SolarView: Georgia Solar Adoption in Context

Jacqueline Hettel Tidwell, Abraham Tidwell, Steffan Nelson, Marcus Hill

Subject: Engineering, Energy And Fuel Technology Keywords: solar; technology adoption; demographics; mixed methods

Online: 30 November 2018 (15:47:46 CET)

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Preprint ARTICLE | doi:10.20944/preprints202407.2149.v1

Improved Thermal Stability under High Power Conversion Efficiency Condition in Inverted Ternary Organic Solar Cells with Three Different Electron Transport Layers

Mohamed El Amine Boudia, Qiuwang Wang, Cunlu Zhao

Subject: Chemistry And Materials Science, Electronic, Optical And Magnetic Materials Keywords: Organic solar cells; Ternary structures; Operating temperature; Electron transport layer; Power conversion efficiency

Online: 26 July 2024 (12:43:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.1007.v1

Development and Evaluation of a Solar Milk Pasteurizer for the Savanna Ecological Zone of West Africa

Iddrisu Ibrahim, Paul Tengey, Joseph Atia Ayariga, Junhuan Xu, Boakai K. Robertson, Olufemi S. Ajayi, James Owusu-Kwarteng

Subject: Biology And Life Sciences, Biology And Biotechnology Keywords: pasteurization; solar pasteurizer; milk treatment; coliform bacteria; pathogens

Online: 15 May 2024 (08:52:35 CEST)

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Solar pasteurization, as a means of treating milk in remote rural areas without electrical power, is based on using solar energy to thermally inactivate pathogenic microorganisms at temperatures below the boiling point to maintain or improve milk quality. A solar milk pasteurizer of flat‐plate water‐heating glass acting as the solar collector, connected to a stainless-steel cylindrical milk vat, was constructed and evaluated in Navrongo, in the tropical savanna zone of Ghana, West Africa. The novel approach taken in this project is to integrate the solar collection and heat exchanger into a single unit using materials and fabrication techniques readily available in the developing world. The vat comprises a 1.5 mm thick stainless steel cylindrical tank, a 2.2 cm wide hot water jacket, and an outer layer of 5.0 mm thick aluminium foil insulation. Hot water produced by the collector was used for pasteurizing milk. The optimum quantity of milk that this device could pasteurize under the study conditions was 8 L. The device could pasteurize raw milk to a maximum temperature of 74 °C at 14:00 h GMT. The ambient temperature during the pasteurization ranged from 30 °C to 43 °C. The microbial analysis before and after the pasteurization was done, and the result shows that the total bacteria count before pasteurization was 6.6x10⁶ log CFU/mL per unit volume, and the total bacteria count after pasteurization was 1.0x10² log CFU/mL. By acceptable standards, the total bacteria count after pasteurization is within a safe range for consumption, and coliform counts were negative. The solar milk pasteurization system is cost-effective. Hence, it is appropriate for milk producers in arid pastoral areas without electricity to adopt the solar pasteurizer as an alternative to firewood as a fuel source for milk pasteurization. This approach can potentially create a cottage industry that may also play a crucial role as a water treatment technology that will improve the health of rural populations.

Preprint ARTICLE | doi:10.20944/preprints202002.0413.v1

Life Cycle Analysis of a Geothermal Power Plant: Comparison of the Environmental Performance with Other Renewable Energy Systems

Riccardo Basosi, Roberto Bonciani, Dario Frosali, Giampaolo Manfrida, Maria Laura Parisi, Franco Sansone

Subject: Engineering, Energy And Fuel Technology Keywords: geothermal energy; life cycle analysis; solar photovoltaic energy; wind energy

Online: 28 February 2020 (01:34:44 CET)

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Preprint REVIEW | doi:10.20944/preprints202407.1069.v1

Direct Solar Thermal Water Splitting Using Iron Electrodes at High Temperatures - A Review

Manuel Fuentes, Diego Pulido, Edward Fuentealba, Alvaro Soliz, Norman Toro, Atul Sagade, Felipe M. Galleguillos Madrid

Subject: Engineering, Chemical Engineering Keywords: Solar thermochemical; water splitting; iron corrosion; solar reactors

Online: 12 July 2024 (14:14:16 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201805.0228.v1

Design PV Tracking System According to Efficiency in Function of Orientation

José Ruelas, Benjamin Pusch, Flavio Muños, Juan Delfin, Francisco Javier Ochoa Estrella

Subject: Engineering, Energy And Fuel Technology Keywords: PV solar tracker; design methodology; efficiency function of orientation

Online: 16 May 2018 (09:51:44 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202001.0072.v1

Thermal Efficiency of a Concentrating Solar Collector Under High-Vacuum

Davide De Maio, Carmine D' Alessandro, Daniela De Luca, Marilena Musto, Emilano Di Gennaro, Giuseppe Rotondo, Roberto Russo

Subject: Engineering, Energy And Fuel Technology Keywords: solar energy; Compound Parabolic Concentrators (CPC); high vacuum insulated solar collectors

Online: 9 January 2020 (05:31:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.1909.v1

Performance of An Energy Production System Consisting of Solar Collector, Biogas Dry Reforming Reactor and Solid Oxide Fuel Cell

Akira Nishimura, Ryotaro Sato, Eric Hu

Subject: Engineering, Energy And Fuel Technology Keywords: Solar Collector; Weather Data; Japanese Cities; Biogas Dry Reforming; H2 Production; SOFC

Online: 29 January 2024 (02:09:27 CET)

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Preprint ARTICLE | doi:10.20944/preprints202210.0244.v1

A Comprehensive Empirical Analysis on Performance Assessment of Different Solar Cookers

Ibadullah Safdar, Muhammad Zahid, Saeed Mian Qaisar, Asad Waqar, Elsayed Tag Eldin, Tehseen Ilahi, Tausif Zahid, Naif Alsharabi

Subject: Engineering, Electrical And Electronic Engineering Keywords: Cooking power; Solar energy; Solar radiations; Sun tracking.; Emperical Analysis

Online: 18 October 2022 (03:21:26 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202205.0085.v1

Calorimetric Testing of Solar Thermal Absorbers for High Vacuum Flat Panels

Carmine D’Alessandro, Davide De Maio, Antonio Caldarelli, Marilena Musto, Francesco Di Giamberardino, Matteo Monti, Teresa Mundo, Emiliano Di Gennaro, Roberto Russo, Vittorio G. Palmieri

Subject: Physical Sciences, Applied Physics Keywords: Selective Solar Absorber; Solar Absorptance; Thermal Emittance; Evacuated Flat Panel; Calorimeter; High Vacuum Flat Panel; Solar Simulator

Online: 7 May 2022 (02:52:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202401.1382.v1

Analysis of Losses Associated with Series Resistance (Rs) in Simple-Structured c-Si Solar Cells

Manuel J Heredia-Rios, Luis Hernandez-Martinez, Monico Linares-Aranda, Javier Flores-Méndez, Mario Moreno-Moreno

Subject: Engineering, Electrical And Electronic Engineering Keywords: photovoltaic; solar energy; solar cells; series resistance

Online: 18 January 2024 (09:10:55 CET)

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Preprint ARTICLE | doi:10.20944/preprints201811.0518.v1

A GIS-Based Method for Identification of Wide area Rooftop Suitability for Minimum Size PV Systems Using LiDAR Data and Photogrammetry

Diane Palmer, Elena Koubli, Ian Cole, Ralph Gottschalg, Thomas Betts

Subject: Engineering, Energy And Fuel Technology Keywords: solar; LiDAR; rooftop photovoltaics; building characteristics; wide-area solar yield

Online: 21 November 2018 (06:59:32 CET)

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Preprint REVIEW | doi:10.20944/preprints202310.1913.v3

Design of Photovoltaic System for Green Manufacturing by using Statistical Design of Experiments

Debo Brata Paul Argha, Md Ashik Ahmed

Subject: Engineering, Civil Engineering Keywords: Solar PV system; Regression Model; DOE; Solar energy; Fossil fuels

Online: 9 November 2023 (10:58:47 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0238.v1

Developing Prediction Models for Solar Photovoltaic Energy Generation Using Statistical and Machine Learning Methods

Yoo-Jung Kim, Na-Hyeong Kim, So-Yeon Park, Chang Ki Kim, Myeongchan Oh, Hyun-Goo Kim, Jin-Young Kim, Yung-Seop Lee

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: decision tree; gradient boosting machine (GBM); machine learning method; multiple regression analysis; photovoltaic plant; random forest; solar photovoltaic energy generation; statistical method

Online: 6 November 2023 (10:21:09 CET)

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Preprint REVIEW | doi:10.20944/preprints202405.1855.v2

Integration of PV Systems in the Urban Environment—A Review

André Rodrigues, Ana I. Palmero-Marrero, Armando C. Oliveira

Subject: Engineering, Energy And Fuel Technology Keywords: urban building energy modelling; PV systems; solar energy; urban heat island

Online: 14 June 2024 (09:31:46 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1592.v1

New Physically-Based Mathematical Model and Experiments for a Recently Invented Solar Pot

Márton Rátkai, Gábor Géczi, Richárd Kicsiny, László Székely

Subject: Engineering, Mechanical Engineering Keywords: solar cooking; solar pot; mathematical modelling; simulation results; measurements

Online: 24 June 2024 (08:16:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0046.v2

Solar Activity Cycles Recur Epidemic and Pandemic Viruses: Space Weather Alerts

Ramy Mawad, Hanafy M. Madbouly, Ehab M. B. Mahdy

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Space weather; Solar terrestrial connection; Climate change; Solar cycle; Environment; Epidemiology

Online: 12 January 2023 (02:36:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints201709.0053.v1

Spatial Dependence Modeling of Wind Resource under Uncertainty Using C-Vine Copulas and Its Impact on Solar-Wind Energy Co-Generation

Apurva Narayan, Kumaraswamy Ponnambalam, Sheree A. Pagsuyoin

Subject: Engineering, Energy And Fuel Technology Keywords: renewable energy; wind and solar power; Kumaraswamy distribution; C-Vine copula

Online: 14 September 2017 (08:41:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0456.v1

Hybrid Off-Grid Energy Systems Optimal Sizing with Integrated Hydrogen Storage Based on Deterministic Balance Approach

Alaa Selim, Mohemed Elshimy, Ghada Amer, Ilham Ihoume, Hasan Masrur, Josep M. Guerrero

Subject: Engineering, Energy And Fuel Technology Keywords: Energy Systems; Hybrid; off-grid; Solar PV; Wind turbines; Hydrogen system; Sizing optimization; Deterministic approach

Online: 8 May 2023 (05:31:31 CEST)

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Integrating numerous renewable resources has been extensively researched and studied to create a dependable energy system. This study investigated the best techno-economical hybrid energy system configuration while using hydrogen energy to keep the system's energy balanced. Additionally, this study aims to determine the best hybrid system configuration for the location under investigation. A novel technique of DBM (Deterministic Balanced Method) was introduced to determine the total annual energy output for the project's lifetime. This approach is used to contrast the outcomes of other HOMER software tools. Then, using HOMER, it is possible to confirm the sizing optimization results for the suggested method by comparing the power ratings and yearly energy output. A detailed comparison between our proposed method and HOMER Pro has been conducted for validation and verification. Our method has been rigorously tested in various hybrid off-grid energy systems, ensuring its applicability and reliability across different scenarios and configurations. The results of our study indicate a high degree of similarity between the proposed approach and HOMER pro for computing annual energy power for the studied energy systems. Specifically, our analysis revealed that the difference between the approaches was within a range of 5%, indicating a high level of consistency and reliability in our method. These findings suggest that our approach can be confidently applied to determine the appropriate size of hybrid energy systems accurately. Overall, our study provides valuable insights into the development of effective sizing methodologies for hybrid energy systems. After considering the amount of solar radiation and wind speed gathered by global weather data platforms like NASA and METEONORM, this paper has also included a real case study of the Cairo International Airport's hybrid renewable energy production systems. To guarantee the viability of this study, the system design was founded on an actual load that was researched and simulated. A cluster of distributed networks was finally proposed to use the excess energy and enable energy conversion processes to be used in industry and transportation applications.

Preprint ARTICLE | doi:10.20944/preprints202408.1615.v1

Optimizing Solar Potential Analysis in Cuba: A Methodology for High-Resolution Regional Mapping

Javier Domínguez, Carlo Bellini, Ana María Martín, Luis F. Zarzalejo

Subject: Environmental And Earth Sciences, Geography Keywords: solar mapping; GIS; solar resources; solar radiation; renewable energies; rural electrification; sustainable development; High-Resolution Models

Online: 22 August 2024 (06:00:40 CEST)

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Preprint REVIEW | doi:10.20944/preprints202401.2160.v1

Advancements in Photovoltaic Cell Materials: Silicon, Organic, and Perovskite Solar Cells

Abniel Machín, Francisco Márquez

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: photovoltaic cells; silicon-based solar cells; organic-based cells; perovskite solar cells

Online: 31 January 2024 (05:53:39 CET)

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Preprint REVIEW | doi:10.20944/preprints202310.1865.v1

A Review on Transparent Solar Panels

Rishi Rajesh Mutagekar, Sakshi Anil Kachare, Pratham Satish Babre, Gunjan Dilip Bhirud, Himanshu Nagraj Pendor, Avanti Vasant Shinde

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: transparent solar panels; renewable energy; OPV; DSSC; Perovskite Solar Cells; Thin-Film Silicon; building-integrated photovoltaics; production costs; integration hurdles.

Online: 30 October 2023 (10:11:34 CET)

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Preprint ARTICLE | doi:10.20944/preprints202002.0002.v1

Green for the Environment and Green for the Pocketbook: A Decade of Living Sustainably

Lawrence Fulton, Bradley Beauvais, Matthew Brooks, Clemens Scott Kruse, Kimberly Lee

Subject: Engineering, Architecture, Building And Construction Keywords: construction; rainwater harvesting; solar; spray foam; finger-jointed studs

Online: 3 February 2020 (03:04:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202309.1614.v1

Analysis of the Performance of a Hybrid Thermal Power Plant Using Anfis-Based Approaches

Kantu T. Kabengele, Isaac Oyeyemi Olayode, Lagouge K. Tartibu

Subject: Engineering, Mechanical Engineering Keywords: Performance; Hybrid thermal power plant; Integrated solar combined cycle power plant (ISCCPP); Adaptive Neuro-Fuzzy Inference System (ANFIS); Particle Swarm Optimization (PSO); Genetic Algorithm (GA); ANFIS-PSO; ANFIS-GA; Evolutionary algorithms

Online: 26 September 2023 (02:59:35 CEST)

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The hybridization of conventional thermal power plants by incorporation of renewable energy systems has witnessed widespread adoption in recent years. This trend aims not only to mitigate carbon emissions but also to enhance the overall efficiency and performance of these power generation facilities. However, calculating the performance of such intricate systems using fundamental thermodynamic equations proves to be both laborious and time-intensive. Nevertheless, possessing accurate and real-time insights into their performance is of utmost significance to ensure optimal plant operation, facilitate decision-making, and streamline power production planning. In this paper, we delve into the application of machine learning techniques, particularly hybrid methodologies, to predict the performance of power plants. Specifically, we employ three approaches: the Adaptive Neuro-Fuzzy Inference System (ANFIS), the ANFIS optimized via Particle Swarm Optimization (ANFIS-PSO), and the ANFIS optimized through Genetic Algorithm (ANFIS-GA). These techniques are alternatively applied to a complex hybrid thermal power plant, namely an Integrated Solar Combined Cycle Power Plant (ISCCPP). This ISCCPP comprises a steam turbine section, a gas turbine section, and a concentrated solar power system utilizing troughs as collectors. The energy transfer fluid, in conjunction with exhaust from the gas turbine section, heats water within a vessel or steam generator, producing steam to propel the steam turbine's rotor. Electricity generation is facilitated by both gas and steam turbines, which are coupled to a generator. The findings of this study underscore the accuracy and appropriateness of ANFIS-based models in evaluating and predicting the performance of intricate hybrid power plants. The ANFIS model exhibited an impressive overall coefficient of correlation of 0.9991. Notably, the integration of evolutionary algorithms (PSO and GA) into the ANFIS framework elevated model performance, yielding correlation coefficients of 0.9994 for ANFIS-PSO and 0.9997 for ANFIS-GA. It is noteworthy that ANFIS-GA demonstrated superior predictive capability. The modeling framework developed in this research offers valuable support to designers, energy managers, and decision-makers. It provides a robust and dependable tool to assess the performance of hybrid thermal power plants, which are poised for a global surge in numbers amid the ongoing energy transition.

Preprint ARTICLE | doi:10.20944/preprints202311.1854.v1

SISA: The First Extreme-Ultraviolet Solar Integral Field Spectrograph Using Slicers

Ariadna Calcines Rosario, Hamish Andrew Sinclair Reid, Sarah Matthews, Frédéric Auchère, Alain Jody Corso, Giulio Del Zanna, Jaroslav Dudik, Samuel Gissot, Laura Hayes, Graham Stewart Kerr, Christian Kintziger, Sophie Musset, Vanessa Polito, Daniel F. Ryan, David Orozco Suárez

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: EUV Spectroscopy; solar IFS; EUV slicers; image slicers; solar space mission; particle acceleration

Online: 29 November 2023 (10:56:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202009.0373.v1

Optimal Operation of Conventional Power Generation with High Penetration of Renewable Energy using Equilibrium Optimizer Technique

Khaled Nusair, Lina Alhmoud

Subject: Engineering, Electrical And Electronic Engineering Keywords: active power loss; total generation cost; emission index; optimal power flow; equilibrium optimizer; solar PV integrated IEEE 30-bus system; wind integrated IEEE 30-bus system; hybrid wind and solar PV integrated IEEE 30-bus system

Online: 17 September 2020 (05:15:42 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.1858.v2

Thermospheric Density Response to the Solar Activity and QBO

Bo Li, Ruifei Cui, Libin Weng, Jianfang Fei

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: thermospheric density; GAMDM; QBO; solar activity

Online: 31 July 2023 (11:23:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202211.0571.v1

High Vacuum Flat Plate Photovoltaic-Thermal (PV-T) Collectors: Efficiency Analysis

Daniela De Luca, Paolo Strazzullo, Emiliano Di Gennaro, Antonio Caldarelli, Eliana Gaudino, Marilena Musto, Roberto Russo

Subject: Physical Sciences, Applied Physics Keywords: Solar energy; photovoltaic-thermal; electrical efficiency; thermal efficiency; exergetic efficiency; energy bandgap

Online: 30 November 2022 (10:07:52 CET)

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Preprint COMMUNICATION | doi:10.20944/preprints202308.1223.v1

Solar Disc Concentrator: Material Selection for the Receiver

Margherita Perrero, Davide Papurello

Subject: Engineering, Energy And Fuel Technology Keywords: solar concentrator; thermal stress; material selection; receiver

Online: 17 August 2023 (09:48:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202004.0350.v1

Cymatics Inspired Self-Cleaning Mechanism for Solar Panels

Edwin Babu, Sumith Yesudasan, Sibi Chacko

Subject: Engineering, Mechanical Engineering Keywords: solar panel; laminatel vibrations; self-cleaning; cymatics

Online: 19 April 2020 (13:51:32 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202009.0344.v1

Optimal Operation of Conventional Power Generation with High Penetration of Renewable Energy using Equilibrium Optimizer Technique

Lina Alhmoud, Khaled Nusair

Subject: Engineering, Electrical And Electronic Engineering Keywords: active power loss; total generation cost; emission index; optimal power flow; equilibrium optimizer; 21 solar PV integrated IEEE 30-bus system; wind integrated IEEE 30-bus system; hybrid wind and solar PV 22 integrated IEEE 30-bus system

Online: 16 September 2020 (03:50:46 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0994.v1

Advances in Room Temperature of Indium Aluminum Nitride InAlN Deposition via Co-Sputtering DC for Solar Energy Applications

Juan David Cañón Bermudez, Luis Fernando Mulcué-Nieto

Subject: Physical Sciences, Condensed Matter Physics Keywords: InAlN solar cells; co-sputtering DC; room temperature; optical properties; morphological properties; low-cost synthesis; Indium Aluminum Nitride

Online: 12 September 2024 (12:58:45 CEST)

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Preprint REVIEW | doi:10.20944/preprints202309.2044.v1

A Review of Photocatalytic Water Splitting for Hydrogen Production Using Tandem Solar Cell

Nur Ain Atiqah Mohd Amin, Hayyiratul Fatimah Mohd Zaid

Subject: Engineering, Chemical Engineering Keywords: photocatalytic water splitting; photoelectrochemical cell; dye solar cell; tandem solar cell; hydrogen

Online: 29 September 2023 (08:05:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201909.0248.v2

Super-Multi-Junction Solar Cell, Device Configuration with the Potential of More Than 50 % of the Annual Energy Conversion Efficiency (Non-Concentration)

Kenji Araki, Yasuyuki Ota, Hiromu Saiki, Hiroki Tawa, Kensuke Nishioka, Masafumi Yamaguchi

Subject: Engineering, Energy And Fuel Technology Keywords: tandem; solar cell; multi-junction; performance ratio; spectrum; modeling; radiative coupling; luminescence coupling

Online: 14 October 2019 (09:56:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201808.0363.v1

Quality Control of Solar Radiation Data within the South African Weather Service Solar Radiometric Network

Lucky Ntsangwane, Venkataraman Sivakumar, Brighton Mabasa, Nosipho Zwane, Katlego Ncongwane, Joel Botai

Subject: Physical Sciences, Applied Physics Keywords: quality control; BSRN; solar radiation; satellite-retrieve irradiance; ground stations; validation

Online: 21 August 2018 (04:23:52 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202210.0007.v1

Optimal Propellant-less Control of a Solar Sail

Andre Pittella, Timothy Sands

Subject: Engineering, Aerospace Engineering Keywords: optimal control; solar sails; Lagrange points; Pontryagin’s Principle

Online: 3 October 2022 (12:13:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202201.0397.v1

Effect Of The Aerosol Vertical Distribution On The Modelling Of Solar Radiation

Ilias Fountoulakis, Kyriakoula Papachristopoulou, Emmanouil Proestakis, Vassilis Amiridis, Charalampos Kontoes, Stelios Kazadzis

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: aerosol profile; aerosol extinction coefficient; aerosol radiative effects; spectral solar radiation; solar radiation profile

Online: 26 January 2022 (12:52:00 CET)

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Preprint ARTICLE | doi:10.20944/preprints202404.0138.v1

Design and Optimization of Electrical Parameters of Perovskites-based Thin Film Solar Cell

Muhammad Muneeb Khan, Sadiq Ahmad, Ali Hassan, And Furqan Shaukat

Subject: Engineering, Energy And Fuel Technology Keywords: Electrical Parameters; Perovskite; Optimization; Renewable Power; SCAPS-1D; PVSyst; Solar Module; Solar Cell

Online: 2 April 2024 (09:25:09 CEST)

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Preprint REVIEW | doi:10.20944/preprints202010.0438.v1

Nanostructures GaAs Solar Cells

Mohammad Nur E Alam, Narottam Das

Subject: Chemistry And Materials Science, Biomaterials Keywords: conversion efficiency; GaAs substrate; light absorption; nano-grating structures; reflection loss; simulation; solar cells

Online: 21 October 2020 (13:28:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202110.0055.v1

Modeling of Combined Lead Fast Reactor and Concentrating Solar Power Supercritical Carbon Dioxide Cycles to Demonstrate Feasibility, Efficiency Gains, and Cost Reductions

Brian White, Michael Wagner, Ty Neises, Cory Stansbury, Ben Lindley

Subject: Engineering, Energy And Fuel Technology Keywords: Supercritical carbon dioxide Brayton cycle; Concentrating Solar Power (CSP); Lead Fast Reactor (LFR), Cogeneration, Complimentary Cycle, Thermal Energy Storage (TES)

Online: 4 October 2021 (12:18:47 CEST)

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Solar power innately has issues with weather, grid demand and time of day, which for the case of concentrating solar power (CSP) can be mitigated through use of thermal energy storage. Nuclear reactors, including lead-cooled fast reactors (LFRs), can load follow, but have high fixed and low operating costs which can make this economically unattractive. We investigate potential synergies through coupling CSP and LFR together in a single supercritical CO$_2$ Brayton cycle and/or using the same thermal energy storage. Combining these cycles allows for the LFR to thermally charge the salt storage in the CSP cycle during low demand periods to be dispatched when grid demand increases. The LFR/CSP coupling into one cycle is modeled to find the preferred location of the LFR heat exchanger, CSP heat exchanger, sCO$_2$-to-salt heat exchanger (C2S), turbines, and recuperators within the supercritical CO$_2$ Brayton cycle. Three cycle configurations have been studied: two-cycle configuration, which uses CSP and LFR heat for dedicated turbocompressors, has the highest efficiencies but with less component synergies; a combined cycle with CSP and LFR heat sources in parallel is the simplest with the lowest efficiencies; and a combined cycle with separate high temperature recuperators for both the CSP and LFR is a compromise between efficiency and component synergies. Additionally, four thermal energy storage charging techniques are studied: the turbine positioned before C2S, requiring a high LFR outlet temperature for viability; the turbine after the C2S, reducing turbine inlet temperature and therefore power; the turbine parallel to the C2S producing moderate efficiency; and a dedicated circulator loop. While all configurations have pros and cons, use of a single cycle offers component synergies with limited efficiency penalty. Using a turbine in parallel with the C2S heat exchanger is feasible but results in a low charging efficiency, while a dedicated circulator loop offers flexibility and near perfect heat storage efficiency but increasing cost with additional cycle components.

Preprint ARTICLE | doi:10.20944/preprints202408.0002.v1

Advanced Perovskite-Silicon Tandem Solar Cells: Enhancing Efficiency and Stability

Chris Bell, Ayoolu Olukemi, Abram Gracias

Subject: Engineering, Other Keywords: Perovskite-Silicon Tandem Solar Cells; Efficiency; Stability

Online: 1 August 2024 (11:56:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201910.0003.v1

A Comparison of Solar Photovoltaic and Solar Thermal Collector for Residential Water Heating and Space Heating System

Md. Habibur Rahaman, M. Tariq Iqbal

Subject: Engineering, Energy And Fuel Technology Keywords: solar photovoltaic; thermal collector; water heating; space heating; performance; cost analysis

Online: 1 October 2019 (02:52:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202401.0302.v1

Radio Emission and Observations from the Solar Transition Region

Baolin Tan, Jing Huang, Yin Zhang, Yuanyong Deng, Linjie Chen, Fei Liu, Jin Fan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar transition region; radio emission; magnetic field; gradient

Online: 4 January 2024 (03:11:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints201712.0109.v1

Efficiency of FTO/Graphene-based Dye-Sensitized Solar Cell

Ayodeji Oladiran Awodugba, Gbadebo Taofeek Yusuf

Subject: Physical Sciences, Condensed Matter Physics Keywords: Graphene, Dye-sensitized solar cell, Efficiency, FTO, SPEED

Online: 15 December 2017 (17:03:33 CET)

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Preprint ARTICLE | doi:10.20944/preprints202405.0692.v1

Suitability Analysis of Solar Energy Plant Sites in Yemen Using AHP, BSM and GIS Methods

Abdulrakeeb Algawbery Noman, Mohamed Ali Shukri, Mohammed Qaseem AL-Moutawakel

Subject: Physical Sciences, Applied Physics Keywords: Solar energy; Yemen; Analytical Hierarchy Process (AHP); Geographic Information System (GIS); Suitability analysis; Site selection; Criteria weighting; Class weighting; Weighted overlay; Suitability map; Optimal areas; Sustainable development; Best-Worst method (BWM)

Online: 13 May 2024 (03:22:07 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints202409.0620.v1

Design and Development of a Low-Cost Parabolic Type Solar Dryer and Its Performance Evaluation in Drying of King Fish – Case Study in Oman

Talal Al Haddabi1, Amuthakkannan Rajakannu

Subject: Engineering, Energy And Fuel Technology Keywords: Solar Energy; Parabolic Solar trough; Solar dryer; evacuated copper tube absorber; Specific heat

Online: 9 September 2024 (08:43:09 CEST)

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Dry Fish is a rich source of proteins and nutrients and can be eaten in many forms. Oman is one of the important fish producers in the world and having high demand in neighboring countries for Oman’s fish. Fishery sector is considered as one of the important economic development sector in sultanate of Oman. In the fishery sector, use of technology is not up to the mark because of less awareness of technology application among Omani fishermen. Also, there is a demand for a greater number of cold storages in different regions to store fresh fishes which is not materialized yet. Similarly, there is a demand of perfect and cheap technology in Oman to dry fishes to improve the profit to the fishermen. Solar energy is abundantly available in Oman and there are high possibilities in Oman to use solar energy in domestic and industrial applications. Since the sunlight is available throughout the year, it is possible to convert in to thermal energy or electrical energy. Electricity can be produced from photovoltaic principle (PV) or indirectly with concentrated solar power. Similarly, we can use solar concentrators for many thermal applications. The solar dryer is a device which is used to dry fruits, vegetables, leaves, clothes etc. If any of the items are dried with the help of solar energy, then we can save lot of non-renewable source of energy and can help to improve economy of the country. The sun can, at least seasonally at Oman’s latitudes, provide a substantial part of the energy needed for various applications. In this work, we used solar dryer to make dry fish with high quality. Use of parabolic type concentrator to dry the fish is an effective solution which is an innovative idea to the fishermen. The temperature variation in dryer is directly proportional to the intensity of solar. The tracking mechanism is a combination of electronic and mechanical design which tracks the sun automatically. In this work, a parabolic concentrator with automatic tracking mechanism was designed and the performance analysis have been done. In the design, copper tubes are used for heat transfer and then the hot fluid is circulated in the box which is used to dry the fishes. As per the experiment, fish drying efficiency obtained from solar dryer is 77.9% and it took 3 days to dry king fish of 20kg. There are many advantages in parabolic type solar concentrators relate to the quality of dryness in the fishes and time taken to dry the fishes which are elaborately discussed in this paper. This solar dryer technology will improve green environment and also will save non-renewable sources of sultanate of Oman for longer period of time.

Preprint ARTICLE | doi:10.20944/preprints202008.0338.v1

Should A Good Organic Solar Cell Be A Good Organic LED?

Gregory Kozyreff, Blaise Godefroid

Subject: Physical Sciences, Applied Physics Keywords: organic solar cells; heterojunction; IQE; organic LED

Online: 15 August 2020 (05:21:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202002.0369.v1

Performance Results of a Solar Adsorption Cooling and Heating Unit

Tryfonas Roumpedakis, Salvatore Vasta, Alessio Sapienza, George Kallis, Sotirios Karellas, Ursula Wittstadt, Mirko Tanne, Niels Harborth, Uwe Sonnenfeld

Subject: Engineering, Energy And Fuel Technology Keywords: Solar Cooling; Adsorption; Evacuated tube collectors; Experimental testing

Online: 25 February 2020 (11:12:51 CET)

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Preprint ARTICLE | doi:10.20944/preprints201912.0407.v1

Re-desiging and Fabrication of the Contact Area of a Solar Milk Pasteurizer

Enebe Vincent, Moveh Samuel

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: re-designing; fabrication; solar; milk; pasteurizer

Online: 31 December 2019 (10:22:43 CET)

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Preprint REVIEW | doi:10.20944/preprints202306.1540.v1

Creating Climate-Neutral Urban Environments: Integrating Solar Energy Technologies and Nature-Based Solutions for Sustainability and Resilience

Hai-Ying Liu, Nikolaos Skandalos, Liga Braslina, Vasileios Kapsalis, Dimitris Karamanis

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: Built environment; Climate adaptation and mitigation; Carbon footprint; Eco-design; Nature-based solutions; Resilient living spaces; Solar energy technologies; Sustainable urban developments; Urban heat island; Urban planning

Online: 21 June 2023 (11:30:47 CEST)

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The need to address climate change and establish sustainable urban environments has driven increased efforts in Europe to develop climate-neutral cities. This study highlights the importance of integrating solar energy technologies and nature-based solutions as key strategies to achieve climate neutrality. By examining current practices, emerging trends, and case examples, it explores the benefits, challenges, and prospects associated with the integration of solar energy and nature-based solutions in urban contexts. The study presents a pioneering approach to assess the urban heat and climate change mitigation benefits of combining building-integrated photovoltaics and nature-based solutions specifically within the European context. The results emphasize the synergistic relationship between nature-based components and solar conversion technology, identifying effective combinations for different climatic zones. In warmer regions of Southern Europe, strategies like rooftop photovoltaics on cool roofs, photovoltaics shadings, green walls, and urban trees have demonstrated effectiveness. Conversely, mid- and high-latitude European cities have seen positive impacts through the integration of rooftop photovoltaics and photovoltaics facades with green roofs and green spaces. As solar cell conversion efficiency improves, the environmental impact of photovoltaics is expected to decrease, facilitating their integration into urban environments. The study emphasizes the importance of incorporating water bodies, cool pavements, spaces with high sky-view factors, and effective planning in urban design to maximize resilience benefits. It also highlights the significance of prioritizing mitigation actions in low-income regions and engaging citizens in the development of social photovoltaics positive energy houses, resilient neighbourhoods, and green spaces. By adopting these recommendations, European cities can lead the way in creating climate-neutral urban environments that prioritize clean energy, nature-based solutions, and the overall well-being of residents. The findings underscore the need for a multidisciplinary approach that combines technological innovation, urban planning strategies, and policy frameworks to effectively achieve climate neutrality in European cities.

Preprint REVIEW | doi:10.20944/preprints202405.1591.v1

Advancements in Solar Cell Fabrication Techniques: A Comprehensive Review

Anju yadav, priyanka Kumari, sonam Gupta, Gudiya kumari, Ratrani upadhyay, gopal gupta

Subject: Physical Sciences, Optics And Photonics Keywords: solar cell; energy conversion; thin-film; crystalline silicon; organic

Online: 24 May 2024 (12:54:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202104.0158.v1

Thickness Optimization of Thin-Film Tandem Organic Solar Cell

Kamran Ali Bangash, Syed Asfandyar Ali Kazmi, Waqas Farooq, Saba Ayub, Muhammad Ali Musarat, Wesam Salah Alaloul, Muhammad Faisal Javed, Amir Mosavi

Subject: Computer Science And Mathematics, Computer Science Keywords: Organic Solar Cells; Triple Junction; Tandem, Energy Harvesting; Temperature.

Online: 6 April 2021 (09:21:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.0147.v1

Power from the Sun: Its Future (Revisited)

Anthony Peters, Vasilis Fthenakis

Subject: Environmental And Earth Sciences, Space And Planetary Science Keywords: space based solar; power beaming; satellite power systems

Online: 2 February 2024 (11:51:48 CET)

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Preprint ARTICLE | doi:10.20944/preprints201805.0227.v1

The Key Scope and Challenge of Development Strategy for Solar Home System

Pimnapat Bhumkittipich, Hideaki Ohgaki

Subject: Engineering, Energy And Fuel Technology Keywords: remote areas; solar home system; sustainable development

Online: 16 May 2018 (08:48:58 CEST)

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Preprint REVIEW | doi:10.20944/preprints201707.0062.v1

The Central Role of Chemistry in the Transition to the Solar Economy

Mario Pagliaro

Subject: Chemistry And Materials Science, Chemical Engineering Keywords: sol-gel; solar energy; bioeconomy; catalysis; nanochemistry

Online: 21 July 2017 (11:30:42 CEST)

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Preprint REVIEW | doi:10.20944/preprints202109.0508.v2

How Fast Is the Distance between Earth and the Sun Changing in the Solar System?

Jim Henry, Mesut Yurukcu, George Nnanna

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Solar System; Earth; Sun; Expansion; Universe

Online: 12 October 2021 (14:27:15 CEST)

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Working Paper ARTICLE

Parametric Open Source Cold-Frame Agrivoltaic System

Joshua M. Pearce

Subject: Engineering, Energy And Fuel Technology Keywords: additive manufacturing; agriculture; agrivoltaic; distributed manufacturing; farming; gardening; open hardware; photovoltaic; recycling; solar energy

Online: 27 September 2021 (11:03:32 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201907.0101.v1

Design and Analysis of Domestic Micro-Cogeneration Potential for an ORC System Adapted to a Solar Domestic Hot Water System

Daniel Leal-Chavez, Ricardo Beltran-Chacon, Paola Cardenas-Terrazas, Saul Islas, Nicolas Velazquez

Subject: Engineering, Energy And Fuel Technology Keywords: solar domestic cogeneration; Organic Rankine Cycle; acetone; evacuated tube solar collector

Online: 8 July 2019 (04:15:59 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201707.0013.v1

Interannual Variability and Seasonal Predictability of Wind and Solar Resources

Nir Y. Krakauer, Daniel S. Cohan

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: renewable energy; solar; wind; interannual variability; seasonal forecasting; teleconnections

Online: 7 July 2017 (03:55:54 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.0044.v1

A Forecasting Global Solar Radiation System Using Combined Supervised- and Unsupervised-learning Models

Chih-Chiang Wei, Yen-Chen Yang

Subject: Engineering, Energy And Fuel Technology Keywords: solar radiation; prediction; cluster algorithm; neural network

Online: 1 November 2023 (09:44:39 CET)

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Preprint ARTICLE | doi:10.20944/preprints202205.0076.v1

Performance Improvement of PCDTBT: PC70BM Polymer Solar Cells with 1,8-diiodooctane Solvent Additive

Wenjuan Yu, Jiale Yang, Bingting Wang, Xiang Fu, Changhai Zhou, Haijun Zhou, Guoxiong Xie, Kexiu Dong, Gan Jin

Subject: Physical Sciences, Optics And Photonics Keywords: polymer solar cells; solvent additive; DIO; PCDTBT

Online: 6 May 2022 (11:44:55 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202201.0163.v1

Junction Configuration Effects on the Photovoltaic Parameters of a-Si/CZTS Solar Cells

H. Bitam, B. Hadjoudja, Beddiaf Zaidi, C. Shakher, S. Gagui, Muhammad Sana Ullah

Subject: Engineering, Electrical And Electronic Engineering Keywords: CZTS; a-Si; Solar cells; SCAPS; Doping

Online: 12 January 2022 (13:30:19 CET)

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Preprint ARTICLE | doi:10.20944/preprints202307.1580.v3

Annual Solar Geoengineering: Mitigating Yearly Global Warming Increases

Alec Feinberg

Subject: Environmental And Earth Sciences, Environmental Science Keywords: solar geoengineering; space mirrors; earth mirrors; desert modification; space clusters; stratosphere injection

Online: 21 September 2023 (09:45:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202401.1282.v1

A Quantitative Analysis of the Need for High Conversion Efficiency PV Technologies in Carbon Mitigation Strategy

Kenneth Hughes, Chris C. Phillips

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: photovoltaics; solar power conversion efficiency; Shockley-Queisser limit; carbon mitigation; energy infrastructure

Online: 17 January 2024 (14:02:01 CET)

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Preprint ARTICLE | doi:10.20944/preprints202211.0095.v1

Solar System-Like Systems with Special Reference to Relativistic Quantum Mechanics and Weak Gravitational Field

Peter Gara

Subject: Physical Sciences, Quantum Science And Technology Keywords: Solar system-like systems; Relativistic Quantum Mechanics; Weak Gravity; Proper Time Scale of the Solar System

Online: 4 November 2022 (13:42:21 CET)

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Preprint REVIEW | doi:10.20944/preprints202407.0800.v1

Direct Use of Copper Slag as Photocatalytic Material for Solar Hydrogen Production

Susana Leiva-Guajardo, Norman Toro, Edward Fuentealba, Mauricio J. Morel, Álvaro Soliz, Carlos Portillo, Felipe M. Galleguillos Madrid

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: Solar hydrogen; Waste Material; Copper slag; Photocatalysis; Metallurgy

Online: 10 July 2024 (14:05:17 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.1652.v1

Evaluating Urban Solar Potential and BEV Charge Cycle Using Real-Data Techniques

Steve Zerafa, Brian Azzopardi, Craig Mifsud

Subject: Engineering, Energy And Fuel Technology Keywords: Drones; Photovoltaics; Electric Mobility; Solar Energy; Spatial analysis

Online: 23 May 2023 (11:11:08 CEST)

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Preprint BRIEF REPORT | doi:10.20944/preprints202006.0328.v1

Mapping of Solar Resource Based on INSAT 3D/3DR Surface Insolation Product

Arun S. Suryavanshi, Alok Taori, A. O. Varghese, Biswadip Gharai

Subject: Environmental And Earth Sciences, Environmental Science Keywords: INSAT 3D; INSAT 3DR; Surface insolation; Solar resource

Online: 28 June 2020 (09:19:10 CEST)

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Solar Insolation is the major contributor of earth’s radiation and energy budget. The insolation reaching the surface is a prime input for eco-physiological processes such as evapotranspiration and photosynthesis. Therefore, it is as critical component to assess bio-energy and bio-fuel resources. It is also a crucial input to crop simulation model for yield forecasting and its further applications in solar energy solutions. Although ground observations are better for accuracy purpose, they have challenges of maintenance, regular calibration and upkeeping etc. This call for the continuous spatio-temporal satellite based observations barring the acceptable accuracy. In case of INSAT3D/3DR, Bhattacharya et al. (2015) have derived the surface insolation product which is being used widely. We propose a method of improvement in this product. It is envisaged that a correction applied with the help of ground truth estimates may enhance the utilization of insolation products derived from INSAT3D/3DR datasets. In the present study, surface insolation product derived from INSAT 3D/3DR data at an interval of 30 minutes each (collectively 15 minutes interval) with 4 km spatial resolution was used for duration from May-2017 to Apr-2019 over Nagpur. Ground truth observations for same duration were carried out with CNR4, which were used to correct the INSAT 3D/3DR surface insolation product using the statistical best-fit method. Corrected INSAT 3D/3DR products are found correlating with the ground values well with differences of approximately < 1 W/m2. Best-fit parameters evolved in the present study uses only 2 years of simultaneous ground and satellite data which can be further improved by multi-year data base. We propose better utilization of INSAT 3D/3DR based surface insolation products in the assessment of solar resource mapping over Nagpur (and possibly other regions, such as Bhandara) with the help of best-fit parameters as assessed in the present study.

Preprint ARTICLE | doi:10.20944/preprints201906.0281.v1

Influence of Interfacial Traps on the Operating Temperature of Perovskite Solar Cells

Hooman Mehdizadeh-Rad, Jai Singh

Subject: Physical Sciences, Condensed Matter Physics Keywords: perovskite solar cells; operating temperature; interface passivation; degradation

Online: 27 June 2019 (06:15:59 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints201809.0613.v1

Fullerene Aggregation in Thin Films of Polymer Blends for Solar Cell Applications

Camilla Lindqvist, Ellen Moons, Jan van Stam

Subject: Chemistry And Materials Science, Surfaces, Coatings And Films Keywords: fullerene aggregation; organic solar cells; fluorescence; organic photovoltaics

Online: 30 September 2018 (16:35:40 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.1614.v1

Integrating Racking Geometry and Site-specific Design Parameters for Bifacial PV Performance Characterization

Shamsul Arefeen ---, Ishtiaque Zaman, Tim Dallas

Subject: Engineering, Electrical And Electronic Engineering Keywords: bifacial PV; bifacial radiance; design optimization; optical ray-trace; bifacial performance modeling; radiance; simulation; solar photovoltaic

Online: 24 November 2023 (15:56:24 CET)

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Preprint ARTICLE | doi:10.20944/preprints202007.0436.v1

Did a Complex Carbon Cycle Operate in the Inner Solar System?

Joseph A. Nuth, Frank Ferguson, Hugh Hill, Natasha Johnson

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Carbon depletion; Solar Nebula; Surface Mediated Reactions; Planetesimal Accretion

Online: 19 July 2020 (20:34:27 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202111.0572.v1

Synthesis and Characterization of Al-doped NiO Nanostructured Thin Films Elaborated by Solar Spray Pyrolysis Technique, for Photovoltaic Cells

Abdelbaki NID, Lilia ZIGHED, Yacine AOUN, Bedreddine MAAOUI

Subject: Physical Sciences, Applied Physics Keywords: Nickel oxide; Thin films; Al doping ratio; Solar spray pyrolysis; Solar heater; Furnace.

Online: 30 November 2021 (13:29:11 CET)

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Preprint ARTICLE | doi:10.20944/preprints202306.1052.v1

Performance Analysis of a Solar-Powered Evaporative Cooling System

Karim Choubani, Mohammed A Almeshaal, Mohamed Ben Rabha

Subject: Chemistry And Materials Science, Surfaces, Coatings And Films Keywords: Evaporative cooling; Solar energy; Performance analysis; Simulation; human comfort; environmental impact

Online: 14 June 2023 (13:49:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.0165.v1

Kinematic Analysis of 4 Bar Mechanisms Applying for Solar Tracking

Rafael Alfonso Figueroa-Díaz, Francisco Guadalupe Urías, Rafael Moreno-Romero, Érica Cecilia Ruiz-Ibarra, Javier De la Cruz-Soto

Subject: Engineering, Mechanical Engineering Keywords: Solar tracker; crank-slider; crank-rocker; comparative analysis; 3D printing

Online: 2 July 2024 (14:49:48 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.0977.v1

Combined K-means Clustering with Neural Networks Methods for PV Short-Term Generation Load Forecasting in Electric Utilities

Alex Sleiman, Wencong Su

Subject: Engineering, Electrical And Electronic Engineering Keywords: machine learning; neural networks; PV power forecasting; smart meters; solar energy

Online: 15 November 2023 (09:52:40 CET)

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Preprint COMMUNICATION | doi:10.20944/preprints202310.1499.v1

A Note on the Solar Neutrino Problem

M. Apostol

Subject: Physical Sciences, Particle And Field Physics Keywords: solar neutrinos; neutrino oscillations; coupled dirac equations; interaction with matter; admixture angle; superfluid correlations

Online: 24 October 2023 (07:45:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.0090.v1

Performance of a Combined Energy System Consisting of Solar Collector, Biogas Dry Reforming and Solid Oxide Fuel Cell – An Indian Case Study

Akira Nishimura, Ryotaro Sato, Ryota Nakajima, Eric Hu

Subject: Engineering, Energy And Fuel Technology Keywords: solar collector; temperature of simulated biogas; case study of installation in India; H2 production by dry reforming; power generation by SOFC

Online: 2 August 2024 (02:53:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202203.0232.v1

Polymer-Coated Daikon-Based Sunlight Absorbers for Highly Efficient Interface Solar Steam Generation

Ming Li, Zhenning Zhang, Fan Yang, Bo Wu, Jie Yi, Zhihui Yang, Yuming Wu, Weiming Wang, Shuai Peng, Jun Xiong, Xue Min

Subject: Chemistry And Materials Science, Surfaces, Coatings And Films Keywords: Solar steam generation; Photothermal materials; Daikon; Polydopamine; Polypyrrole

Online: 16 March 2022 (10:16:34 CET)

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Preprint ARTICLE | doi:10.20944/preprints202007.0695.v1

Performance Study of Integrated Solar-Water Supply System for Isolated Agricultural Areas in Thailand: Two Case-Study Villages of The Royal Initiative Project

Thanongsak Imjai, Kamon Thinsurat, Pakorn Ditthakit, Warit Wipulanusat, Monthian Setkit, Reyes Garcia

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: water resource management; solar-water; solar-water supply system; SWSS; decision support; solar pumping; climate change; royal initiative project

Online: 29 July 2020 (11:40:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201804.0067.v1

Polymers of Limonene Oxide and Carbon Dioxide: Polycarbonates of the Solar Economy

Mario Pagliaro, Alexandra Fidalgo, Leonardo Palmisano, Laura M. Ilharco, Francesco Parrino, Rosaria Ciriminna

Subject: Chemistry And Materials Science, Organic Chemistry Keywords: limonene; poly(limonene carbonate); bioeconomy; sustainable polycarbonates; solar economy

Online: 5 April 2018 (10:48:13 CEST)

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