Effect of Color Coating of Cover Plate on Thermal Behavior of Flat Plate Solar Collector

Chengyi Li, Qunwu Huang and Yiping Wang
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Chengyi Li: School of Architecture, Tianjin University, Tianjin 300072, China
Qunwu Huang: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Yiping Wang: School of Architecture, Tianjin University, Tianjin 300072, China

Energies, 2020, vol. 13, issue 24, 1-16

Abstract: An important trend of Building Integrated Solar Thermal (BIST) system is to improve the aesthetic aspect of the solar collector to meet the requirement of architectural style and energy collection. Painting on the glass cover in an appropriate method is a simple and practical way. In this study, a halftone coating was used to print a red brick wall pattern on the glass cover. A series of comparative experiments were carried out to test the effect of the coating on the thermal behavior of the solar collector. In heat collection processes, compared with the solar collector with blank cover plate, the one with coated cover plate has lower absorber plate temperature and higher cover plate temperature. The lower the solar irradiance, the smaller the effect of color coating on the solar collector. Compared with the uncoated surface, the coated surface is more sensitive to solar irradiation. In the same heat collection process, compared with the solar collector coated on the outer surface of the cover plate, the one coated on the inner surface has 0.8 °C higher heat absorber plate temperature and 5% lower top heat loss.

Keywords: coating; cover plate; solar collector; heat transfer; thermal network (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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