In order to improve the system performance of PHOTOVOLTAIC-THERMAL coupled air source heat pump （PV/T-ASHP） heating system, a solal Photovoltaic-Thermal coupled air source heat pump heating （PV/T-P-ASHP） system with an added preheating method is presented in this paper. The system model is built based on TRNSYS, and after the accuracy of the model is verified, the relevant performance enhancement of the PV/-P-ASHP system and the PV/T-ASHP system is compared and analyzed, and the applicability of the systems in different regions is explored. The results show that the average relative errors of the system model validation for PV/T electrical efficiency, thermal efficiency, and COP of the heat pump unit are 5.09%,9.06%, and 5.25%, respectively, and the experimental model and the results coincide accurately. Taking Beling as an example, it is found that the PV/T-P-ASHP system saves 4.38% of the annual operating energy consumption compared to the PV/-ASHP system, the COP of the heat pump unit is increased by 36.28%, the integrated efficiency of the PV/T is increased by 4.32%, the COP of the system is increased by 4.18% during the heating season, and the primary energy saving rate is increased by 6.47%. Simulation comparisons in different regions show that the highest system COP improvement of 4.18% is observed in Beling, A 5.78% increase in PV/T overall efficiency, a 6.58% increase in primary energy savings, and a 2.3% increase in system COP is observed in Dalian, a 4.24% increase in PV/T overall eficiency. a 5.81% increase in primary energy savings, and a 2.29% increase in system COP is observed in Shenyang, and a 1.4% increase in system COP with the addition of preheating is observed in Shanghai, with a smaller overall system performance improvement.
Key words
solar energy /
PVT /
air source heat pumps /
heating /
TRNSYS /
different regions
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