Modeling and Simulation Analysis of Photovoltaic Photothermal Modules in Solar Heat Pump Systems

Tianbao Sun, Zhun Li (), Yujun Gou (), Guangzheng Guo, Yue An, Yongqi Fu, Qingan Li and Xiaohui Zhong
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Tianbao Sun: China Institute of Metrology, Beijing 100029, China
Zhun Li: China Institute of Metrology, Beijing 100029, China
Yujun Gou: College of Metallurgy and Energy, North China University of Technology, Tangshan 063210, China
Guangzheng Guo: College of Metallurgy and Energy, North China University of Technology, Tangshan 063210, China
Yue An: College of Metallurgy and Energy, North China University of Technology, Tangshan 063210, China
Yongqi Fu: College of Metallurgy and Energy, North China University of Technology, Tangshan 063210, China
Qingan Li: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
Xiaohui Zhong: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China

Energies, 2024, vol. 17, issue 5, 1-14

Abstract: A solar heat pump based on the photovoltaic photothermal (PV/T) module is a new technology that can improve the photovoltaic efficiency and recovery of waste heat in photovoltaic conversion. The comprehensive efficiency of a system can thus be greatly improved. At present, there is little research on the simulation of a solar heat pump based on the Simulink 2018 software. In this paper, PV/T modules are modeled and simulated using the Simulink software based on the typical meteorological parameters in Beijing city during summer and winter conditions. Considering the system characteristics of a simultaneous operation, the models of all components such as the compressor, condenser, evaporator, expansion valve, and heat storage tanks contained in a system are established based on the system’s working principle, energy conservation equations, and some empirical formulas and then simulated. As PV/T modules are the key influencing factor for system performance, the model and simulation process are introduced in detail in this paper. The results show that the surface temperature of PV/T modules under different operating conditions are all significantly lower than that of ordinary photovoltaic panels. The average temperature of PV/T modules is only 15.2 °C, which is 20.2 °C lower than that of ordinary panels under summer conditions, and the average temperature of PV/T modules is only 0.5 °C, 17.8 °C lower than that of ordinary panels under winter conditions. The average photoelectric efficiency can be improved by 15.4% and 8.9%. And, the temperature change amplitude of PV/T modules is lower, which weakens the temperature fluctuation of the modules. The photovoltaic efficiency is therefore further increased. As a result, the power generation and photovoltaic efficiency are both improved significantly.

Keywords: PV/T modules; solar heat pump; systems; Simulink (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: 2024
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