Simulation and Analysis on the Solar-Assisted Direct-Expansion PVT Heat Pump Hot Water System in Lingang

doi:10.11930/j.issn.1004-9649.202209105

Electric Power ›› 2023, Vol. 56 ›› Issue (3): 23-29.DOI: 10.11930/j.issn.1004-9649.202209105

• New Utilization of Renewable Energy and Its Key Technologies Under the Dual-Carbon Target • Previous Articles Next Articles

Simulation and Analysis on the Solar-Assisted Direct-Expansion PVT Heat Pump Hot Water System in Lingang

LIU Wenjie¹, PENG Cihua², YAO Jian¹, JIA Teng¹, DAI Yanjun¹

1. Engineering Research Center of Solar Energy and Refrigeration, MOE, Shanghai Jiao Tong University, Shanghai 200240, China;
2. Shanghai Solar Energy Society, Shanghai 200230, China

Received:2022-09-20 Revised:2023-02-20 Accepted:2022-12-19 Online:2023-03-23 Published:2023-03-28
Supported by:
This work is supported by Shanghai 2020 “Science and Technology Innovation Action Plan” Key Technologies R&D Program for Social Development (Research on the Implementation Mode and Mechanism Innovation of Comprehensive Energy Infrastructure in Lingang New Area, No.20dz1206309).

Abstract

Abstract: The solar-assisted direct-expansion PVT (photovoltaic-thermal) heat pump is a novel and efficient technology to utilize the solar energy comprehensively. The simulation model of the solar-assisted direct-expansion PVT heat pump hot water system on Matlab platform was developed based on the energy balance, and the effect of the varying environmental conditions and different configurations was investigated. Based on the data of environmental conditions in Lingang, we simulated the hot water supply performance of the systems with different configurations on typical days in different seasons, besides the year-round variation of the electricity generation benefits. The COP of the hot water system increases with the decreasing theoretical displacement of the compressor, however, the needed heating time of the system increases; the year-round electricity generation benefits decrease when the theoretical displacement of the compressor decreases.

Key words: solar energy, direct-expansion, PVT heat pump, hot water system, performance simulation, electricity generation benefit.

LIU Wenjie, PENG Cihua, YAO Jian, JIA Teng, DAI Yanjun. Simulation and Analysis on the Solar-Assisted Direct-Expansion PVT Heat Pump Hot Water System in Lingang[J]. Electric Power, 2023, 56(3): 23-29.

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Simulation and Analysis on the Solar-Assisted Direct-Expansion PVT Heat Pump Hot Water System in Lingang

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