Photo-thermal decoupling CdTe PV windows with selectively near-infrared absorbing ATO nanofluids

Shaohang Shi, Ning Zhu, Yifan Li and Yehao Song

Renewable Energy, 2024, vol. 235, issue C

Abstract: Solar energy conversion and utilization are crucial for buildings. Photovoltaic windows are a promising path to improving building energy efficiency. This study proposes a novel photo-thermal decoupling cadmium telluride (CdTe) PV windows with selectively near-infrared absorbing antimony-doped tin oxide (ATO) nanofluids. The PV-ATO window features four concentrations (200/400/800/1000 ppm). Hot box experiment results show that PV-ATO windows can reduce the peak indoor air temperature by up to 2.56, 2.06, 2.86, and 2.72 °C respectively, while the corresponding peak illuminance is cut by 13.01 %, 12.37 %, 17.40 %, and 56.28 %. Measured transmitted spectra's correlated color temperature (CCT) of the PV-Water and PV-ATO windows are in the range of 4811.0～5271.0 K; color render index (Ra) is between 95.7～98.8; color fidelity index (Rf) is between 96.9～99.1; color gamut index (Rg) is between 97.6～99.3. Regarding color rendering performance, the PV-ATO windows can outperform conventional windows. Energy simulation results show that the comprehensive energy-saving ratios of different PV-ATO windows in Guangzhou, Changsha, Chongqing, and Wuhan can achieve −11.27 %, −20.38 %, −0.08 %, and −5.17 %. The study points to low concentrations of ATO nanofluids (200 ppm) as the recommended value.

Keywords: Solar energy; Nanofluids; Building energy saving; Photovoltaic windows; Spectral decoupling (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:235:y:2024:i:c:s0960148124012461

DOI: 10.1016/j.renene.2024.121178

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