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Electrical and thermal performance comparison between PVT-ST and PV-ST systems

Han, Zhonghe; Liu, Kaixin; Li, Guiqiang; Zhao, Xudong; Shittu, Samson


Zhonghe Han

Kaixin Liu

Guiqiang Li

Samson Shittu


Both photovoltaic (PV), and photovoltaic thermal (PVT) are technologies that use solar energy for power output. Combining them with solar thermal (ST) can enable the generation of electricity as well as high-temperature hot water. In this study, The heat transfer model was established to investigate the thermal, electrical and overall performance of the two systems, which one is a separately operating PV and ST system (i.e. PV-ST system) and the other is a PVT and ST system in series (i.e. PVT-ST). By comparing the electrical, thermal and overall performance of the two combinations under different solar radiation, ambient temperature and inlet temperature, the application range, advantages and disadvantages of the two combinations are given, which can provide guidance for the design of higher electrical and thermal output system. The comparative study of the two systems shows that the electrical efficiency, thermal efficiency and primary energy saving efficiency of the PV-ST system are higher than that of the PVT-ST system under the conditions of low ambient temperature and solar radiation. This makes the PV-ST system have a wider application prospect in such low temperature and weak radiation environment conditions. However, under the environmental conditions of higher ambient temperature and stronger solar radiation intensity, the electro-thermal efficiency and primary energy saving efficiency of PVT-ST system will be higher than that of PV-ST system. The PVT-ST system will be widely used in high temperature and strong radiation conditions.


Han, Z., Liu, K., Li, G., Zhao, X., & Shittu, S. (2021). Electrical and thermal performance comparison between PVT-ST and PV-ST systems. Energy, 237, Article 121589.

Journal Article Type Article
Acceptance Date Jul 23, 2021
Online Publication Date Jul 28, 2021
Publication Date Dec 15, 2021
Deposit Date Aug 9, 2021
Publicly Available Date Jul 29, 2022
Journal Energy
Print ISSN 0360-5442
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 237
Article Number 121589
Keywords Photovoltaic; PVT; Electrical and thermal; Performance comparison; Heat transfer
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