Research on the Performance and Energy Saving of Solar-Coupled Air Source Heat Pump Heating System: A Case Study of College Dormitory in Hot Summer and Cold Winter Zone

Xu Wang, Shidong Wang and Tao Li ()
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Xu Wang: Jinchang City Urban Public Water Supply Co., Ltd., Jinchang 737101, China
Shidong Wang: Gansu Institute of Architectural Design and Research Co., Ltd., Lanzhou 730000, China
Tao Li: School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China

Energies, 2025, vol. 18, issue 14, 1-19

Abstract: As a densely populated area, college student dormitories consume a large amount of electricity every year to heat the domestic hot water used by students. Applying solar energy to hot water systems can effectively alleviate this situation. This paper first conducts a simulation of the hot water load and the calculation of the available area of the solar roof in a dormitory building of a certain university. Then, different solar-coupled air source heat pump systems were designed, and simulation models of the two systems were established. The thermal performance parameters and solar energy utilization of the two systems were discussed, and the energy efficiency, economy, and environmental protection of the two systems were analyzed. The results show that after coupling with the solar collector, the system operation time is shortened by 26.2%, the annual performance coefficient is 3.4, which is 0.8 higher than that of the original system, and the annual heating energy consumption is reduced by 24.4%. In contrast, the annual energy self-sufficiency rate of the photovoltaic coupled with air source heat pump system is 94.6%, achieving nearly zero energy consumption for heating.

Keywords: air source heat pump; multiple energy coupling; photovoltaic; solar energy; university dormitories (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: 2025
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