STUDY ON CONTROL STRATEGY AND OPERATION CHARACTERISTICS OF SOLAR-GROUND SOURCE HEAT PUMP SYSTEM

Sun Chang; Zhang Lei; Zhang Guangyu; Ju Xiaolei; Lu Yongfei

doi:10.19912/j.0254-0096.tynxb.2022-1548

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Acta Energiae Solaris Sinica ›› 2024, Vol. 45 ›› Issue (1) : 95-101. DOI: 10.19912/j.0254-0096.tynxb.2022-1548

STUDY ON CONTROL STRATEGY AND OPERATION CHARACTERISTICS OF SOLAR-GROUND SOURCE HEAT PUMP SYSTEM

Sun Chang, Zhang Lei, Zhang Guangyu, Ju Xiaolei, Lu Yongfei

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Abstract

In order to solve the problem of soil temperature decreasing year by year in the application of ground source heat pump system in China Northwest villages and towns, a solar assisted system is added, and the control strategy of the solar-ground source heat pump system （SGSHP） is setup, and the applicable areas of SGSHP are analyzed. Taking a primary school as the measurement object, literature research and digital simulation are used to propose and simulate operation strategy. The results show that SGSHP is suitable for agricultural facilities and schools. The optimal control strategy is that solar energy heats soil in non-heating seasons and solar heating is preferred in heating seasons. The optimized area of solar collector is 86 m², and the volume of water tank is 3.9 m³. The sectional area of heat exchanger is 0.4 m², and the flow of circulating pump is 6.6 m³/h. The heat exchange tube is 120 m long, and the soil temperature can be restored in a natural year.

Key words

geothermal energy heating / control strategy / TRNSYS simulation / solar energy heating / ground source heat pump

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Sun Chang, Zhang Lei, Zhang Guangyu, Ju Xiaolei, Lu Yongfei. STUDY ON CONTROL STRATEGY AND OPERATION CHARACTERISTICS OF SOLAR-GROUND SOURCE HEAT PUMP SYSTEM[J]. Acta Energiae Solaris Sinica. 2024, 45(1): 95-101 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1548

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