DESIGN AND FEASIBILITY STUDY OF COUPLED HEATING SYSTEM FOR SHALLOW-MEDIUM DEEP GEOTHERMAL CASCADE UTILIZATION

Li Meiqing; Li Wenxin; Chen Zhenqian

doi:10.19912/j.0254-0096.tynxb.2025-0069

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (6) : 513-522. DOI: 10.19912/j.0254-0096.tynxb.2025-0069

DESIGN AND FEASIBILITY STUDY OF COUPLED HEATING SYSTEM FOR SHALLOW-MEDIUM DEEP GEOTHERMAL CASCADE UTILIZATION

Li Meiqing, Li Wenxin, Chen Zhenqian

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Abstract

Taking a large public building in a hot summer and cold winter area as the research object, a simulation model of shallow medium deep geothermal cascade utilization coupled heating was built based on TRNSYS software. The operating characteristics of the shallow medium deep coupled heating system during the heating season were analyzed and compared with a single medium deep geothermal cascade utilization heating system and a shallow ground source heat pump system. The results show that the coupled system is superior to a single deep or shallow geothermal heating system in terms of end heat transfer, geothermal return water temperature, heat pump unit COP, and system energy utilization efficiency. The system is more stable and adaptable. The average energy utilization efficiency of the system reaches 0.95, verifying the feasibility of the coupled system operation.

Key words

middle deep geothermal energy / cascade utilization / geothermal heating / ground source heat pump / TRNSYS simulation / system energy efficiency

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Li Meiqing, Li Wenxin, Chen Zhenqian. DESIGN AND FEASIBILITY STUDY OF COUPLED HEATING SYSTEM FOR SHALLOW-MEDIUM DEEP GEOTHERMAL CASCADE UTILIZATION[J]. Acta Energiae Solaris Sinica. 2026, 47(6): 513-522 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0069

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