Photovoltaic Thermal Heat Pump Assessment for Power and Domestic Hot Water Generation

Chao Zhou, Ahmad Riaz, Jingjing Wang (), Jili Zhang and Lin Xu
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Chao Zhou: School of Architectural Engineering, Weifang University of Science and Technology, Weifang 262700, China
Ahmad Riaz: Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China
Jingjing Wang: School of Architectural Engineering, Weifang University of Science and Technology, Weifang 262700, China
Jili Zhang: Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China
Lin Xu: Shandong Fuyuan Architectural Design Co., Ltd., Weifang 261000, China

Energies, 2023, vol. 16, issue 19, 1-21

Abstract: The efficient utilization of solar energy significantly contributes to energy efficiency in buildings. Solar photovoltaic thermal (PVT) heat pumps, a hybrid of photovoltaic and solar-assisted heat pumps, have demonstrated a significant development trend due to their multi-generational capacity for heating, power, and cooling with reliable operational performance. This research work presents and investigates a single-stage compression PVT heat pump system, along with the operation principle of the system’s heating and power co-generation throughout the winter and transitional season. The construction of the testing facility, data reduction, error analysis, and performance evaluation indices of the system are all explained theoretically. A continuous experiment research project focusing on system heating and power performance was carried out in Dalian during the transition season (November in this study) and winter season (December in this study) as part of our investigation into the potential uses for space heating, residential hot water, and power supply in northern China. The findings of the experimental research demonstrate that the proposed system can generate electricity and heat at high efficiency during the winter and transitional seasons, with long-term stable performance. The system’s average heating COP t is 5 during the transitional season and 4.4 during the winter season. Meanwhile, the average photovoltaic power efficiency under both weather conditions is 11.9% and 10.2%, with a peak value of 15.7% and 12.0%, respectively. Additionally, the system compression ratio’s variation range is 2 to 3.88, which is lower than the standard heat pump system. As a result, the entire system heating operating process remains constant.

Keywords: solar photovoltaic thermal; roll-bond photovoltaic; photovoltaic thermal heat pump; co-generation evaluation; experimental study (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: 2023
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