International inter-laboratory comparison of solar heat gain coefficient of building-integrated photovoltaic modules - results of tests with or without power generation and tests with PV cell coverage ratios

作者：Hisashi Ishii, Helen Rose Wilson, S Hagihara, Ulrich Amann, Veronika Shabunko, Simon Boddaert · 发表于：Energy and Buildings · 年份：2024 · DOI：10.1016/j.enbuild.2024.114843 · 被引用次数：7 · 研究领域：Photovoltaic System Optimization Techniques、Solar Thermal and Photovoltaic Systems、Building Energy and Comfort Optimization

The solar heat gain coefficient is one of the important indicators to evaluate the performance of the building envelope components. In a BIPV module , secondary heat transfer to the indoors is reduced, compared to conventional glazing, due to the shielding effect of the PV cells and energy conversion by power generation . There is a difference in SHGC between power-generating (MPP) and effectively open-circuit (OC) states. In this paper, in order to prepare a calorimetric SHGC evaluation methodology for BIPV modules, we documented the current status of the experimental calorimetric test methods and test apparatus adopted by test laboratories in four different countries and identified the differences. Differences between the test laboratories were found in the applied test methods, solar simulator types, spectral distributions , irradiation inhomogeneity on the light-receiving surface of the test sample, temperature conditions between the test chamber and the metering box, and surface heat transfer coefficients . Especially, the round-robin test results obtained in an interlaboratory comparison clarified that the differences in the characteristics of the Calorimetic Hot Box and the Heat Flux Metering methodologies with a cooled plate, the differences in irradiation inhomogeneity on the light-receiving surface of the test sample and differences in surface heat transfer coefficients significantly affect the SHGC evaluation for BIPV modules. In addition, for the SHGC test in the ...