Experimental and numerical studies on the thermal and electrical performance of a CdTe ventilated window integrated with vacuum glazing

The application of PV double skin ventilated windows (PV-DSV) can reduce intense sunlight from entering room and meantime lower the cell temperature. Vacuum glazing is superior in thermal insulation. To further strengthen the thermal insulation of the PV-DSV, this paper proposes an integrated vacuum...

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Bibliographic Details
Published in:Energy (Oxford) 2022-04, Vol.244, p.123128, Article 123128
Main Authors: Zhang, Chengyan, Ji, Jie, Wang, Chuyao, Ke, Wei, Xie, Hao, Yu, Bendong
Format: Article
Language:English
Subjects:
BIPV/T
Cadmium telluride cells
Cooling loads
Cooling systems
Design factors
Emissivity
Insulation
Mathematical analysis
PV window
Thermal insulation
Vacuum
Vacuum glazing
Ventilated window
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Summary:The application of PV double skin ventilated windows (PV-DSV) can reduce intense sunlight from entering room and meantime lower the cell temperature. Vacuum glazing is superior in thermal insulation. To further strengthen the thermal insulation of the PV-DSV, this paper proposes an integrated vacuum glazing with PV double-skin ventilated window (VPV-DSV), which employs the CdTe PV glazing and the vacuum glazing as the front and back glazings. Thermal and electrical performance of the VPV-DSV was investigated and compared with the PV vacuum insulating glazing unit (VPV-IGU) through experiment and simulation. Comparison of PV-DSV with different types of back glazing was made to explore the influence of back glazing types in PV-DSV. Furthermore, influence of the window design factors was explored. Results indicated that the use of vacuum glazing improved the thermal insulation of PV-DSV and resulted in 59.8% reduction of the U-value. VPV-DSV reduced more cooling load, but VPV-IGU outperformed VPV-DSV in thermal insulation. Owing to a small temperature coefficient of the CdTe cell, their power output was similar. In addition, the WWR and PV coverage had more obvious impacts on the performance of VPV-DSV than the emissivity of low-e coating. •CdTe glazing and vacuum glazing were integrated in ventilated window.•PV vacuum ventilated window were compared with other two windows.•Mathematical models of these windows were developed and validated.•Impacts of back glazing type of ventilated windows was discussed.•Design factors of the PV vacuum ventilated window were analyzed.
ISSN:0360-5442
1873-6785
DOI:10.1016/j.energy.2022.123128