Version 1
: Received: 9 May 2024 / Approved: 10 May 2024 / Online: 10 May 2024 (18:30:28 CEST)
How to cite:
Gaudino, E.; Farooq, U.; Caldarelli, A.; Strazzullo, P.; De Luca, D.; Di Gennaro, E.; Musto, M.; Russo, R. Thermal Emittance Measurement of Very Low-Emissive Materials for Solar Thermal Applications. Preprints2024, 2024050717. https://doi.org/10.20944/preprints202405.0717.v1
Gaudino, E.; Farooq, U.; Caldarelli, A.; Strazzullo, P.; De Luca, D.; Di Gennaro, E.; Musto, M.; Russo, R. Thermal Emittance Measurement of Very Low-Emissive Materials for Solar Thermal Applications. Preprints 2024, 2024050717. https://doi.org/10.20944/preprints202405.0717.v1
Gaudino, E.; Farooq, U.; Caldarelli, A.; Strazzullo, P.; De Luca, D.; Di Gennaro, E.; Musto, M.; Russo, R. Thermal Emittance Measurement of Very Low-Emissive Materials for Solar Thermal Applications. Preprints2024, 2024050717. https://doi.org/10.20944/preprints202405.0717.v1
APA Style
Gaudino, E., Farooq, U., Caldarelli, A., Strazzullo, P., De Luca, D., Di Gennaro, E., Musto, M., & Russo, R. (2024). Thermal Emittance Measurement of Very Low-Emissive Materials for Solar Thermal Applications. Preprints. https://doi.org/10.20944/preprints202405.0717.v1
Chicago/Turabian Style
Gaudino, E., Marilena Musto and Roberto Russo. 2024 "Thermal Emittance Measurement of Very Low-Emissive Materials for Solar Thermal Applications" Preprints. https://doi.org/10.20944/preprints202405.0717.v1
Abstract
In the quest for more efficient solar thermal systems, accurately determining the thermal emittance of low-emissive materials is crucial in determining the power losses. This paper describes the calorimetric method designed to precisely measure the thermal emittance of Selective Solar Absorbers (SSAs) to be used in High Vacuum Flat Plate Collectors (HVFPCs). The method's capability is demonstrated through the successful correction of thermal emittance values for copper samples of varying sizes, including dimensions down to 49 cm². Results highlight the method's potential to significantly reduce measurement errors associated with small-size and/or low-emittance samples, providing a path forward to improve the design and efficiency of SSAs. This research marks a significant step in advancing solar thermal technology by enabling emittance measurements with a precision better than 0.003, which is essential for the development of high-performance solar thermal absorbers. The method has also been applied to correct the thermal emittance value of SSA measured in previous measurement campaigns, and it allows a better estimation of the SSA efficiency conversion curve.
Keywords
thermal emittance; calorimetric measurements procedure; selective solar absorbers; high vacuum flat plate collectors; very low thermal emittance
Subject
Engineering, Other
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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