Preprint

Simulation on Two-stage heat pump/thermosyphon system for geothermal cascade utilization

Yin LiSchool of Energy and Environmental Engineering , University of Science and Technology Beijing , Beijing 100083 , ChinaHainan ZhangSchool of Energy and Environmental Engineering , University of Science and Technology Beijing , Beijing 100083 , ChinaOtabek BoltayevDepartment of Electrical Engineering of Tashkent State Transport University , Tashkent , 100167 , UzbekistanYanhui FengSchool of Energy and Environmental Engineering , University of Science and Technology Beijing , Beijing 100083 , China

2025

Ochiq kirishYashil

ABI

Annotatsiya

In order to improve the energy efficiency and economy of geothermal cascade utilization system, this paper proposes a two-stage heat pump / thermosyphon system (THPTS), which optimizes the cascade utilization of geothermal energy by combining heat pump and thermosyphon technology.Based on TRNSYS software, the simulation models of traditional two-stage heat pump system (THPS) and THPTS are built, and their performances in geothermal heating are compared and analyzed.Taking an office building in Beijing as an example, the hourly load of the building is simulated, and the system operation strategy is designed: when the heat load is lower than the threshold, the thermosyphon mode is used for direct heat transfer; conversely, switch to heat pump mode.The results show that THPTS can maintain the heat extraction efficiency at 59.74 %, and the total power consumption in the heating season is 6.13 % lower than that of THPS, and the energy saving effect is obvious.This study provides an innovative solution for the efficient utilization of geothermal resources.

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Identifikatorlar

DOI: 10.46855/energy-proceedings-11869

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