PERFORMANCE ANALYSIS OF PARTITIONED SEASONAL THERMAL ENERGY STORAGE IN SOLAR-ASSISTED GROUND SOURCE HEAT PUMP SYSTEM FOR SEVERE COLD REGIONS

Hou Yuebin; Xu Wei; Li Ji; Zhang Xinyu; Wang Xuan; Li Lulu

doi:10.19912/j.0254-0096.tynxb.2024-1575

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (1) : 177-185. DOI: 10.19912/j.0254-0096.tynxb.2024-1575

PERFORMANCE ANALYSIS OF PARTITIONED SEASONAL THERMAL ENERGY STORAGE IN SOLAR-ASSISTED GROUND SOURCE HEAT PUMP SYSTEM FOR SEVERE COLD REGIONS

Hou Yuebin¹, Xu Wei¹, Li Ji¹, Zhang Xinyu¹, Wang Xuan¹, Li Lulu²

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Abstract

To investigate the performance of different operating strategies of a solar-assisted ground source heat pump （SGSHP） system in severe cold regions, a numerical simulation model is developed based on Fluent. Three operating modes are simulated and compared： a conventional ground source heat pump（GSHP） system, an SGSHP system with uniform heat storage, and an SGSHP system with partitioned heat storage. The results show that the coupled system achieves cross-seasonal heat storage and utilization. It also improves the energy efficiency of the ground source heat pump system and reduces the annual energy consumption by over 20%. The partitioned operating strategy demonstrates superior thermal regulation, concentrating heat storage in the inner zone and simultaneously lowering the outer zone temperature. The annual heat loss is reduced significantly from 38.71% to 19.19%, which improves the cross-seasonal heat storage efficiency and heat pump performance. The annual energy consumption of the system is further reduced.

Key words

ground source heat pump / solar energy / seasonal thermal energy storage / numerical simulation / partitioned operating strategy / heat loss

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Hou Yuebin, Xu Wei, Li Ji, Zhang Xinyu, Wang Xuan, Li Lulu. PERFORMANCE ANALYSIS OF PARTITIONED SEASONAL THERMAL ENERGY STORAGE IN SOLAR-ASSISTED GROUND SOURCE HEAT PUMP SYSTEM FOR SEVERE COLD REGIONS[J]. Acta Energiae Solaris Sinica. 2026, 47(1): 177-185 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1575

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