土壤蓄冷与耦合热泵集成系统中土壤蓄冷的模拟研究

SIMULATIVE RESEARCH ON SOIL THERMAL STORAGE IN INTEGRATED SOIL THERMAL STORAGE AND GROUND-COUPLED HEAT PUMP SYSTEM

结合土壤耦合热泵技术及冻土蓄冷技术的优点,提出一种全新的热泵空调系统形式-土壤蓄冷与土壤耦合热泵集成系统。该系统将土壤耦合热泵系统(GCHP)的地下埋管换热器与蓄冷装置合二为一,在电力低谷期将冷量贮存到土壤中,以满足高峰电力期空调负荷的需要。在能量平衡的基础上建立了土壤蓄冷释冷过程的数学模型,并采用固相增量法模型对其进行了模拟计算,分析其应用的技术可行性,为土壤蓄冷与土壤耦合热泵集成系统的应用提供理论支持。

Combined the advantages of the ground-coupled heat pump and frozen soil thermal storage technology, a heat pump air conditioning system, integrated soil thermal storage and ground-coupled heat pump (GCHP) system, was presented. The geothermal heat exchangers of the GCHP system and the thermal storage devices are united in the system. During the off-peak period, the cooling load is stored on the underground soil partially or fully to satisfy the air conditioning load requirement during the on-peak period. Based on the energy balance, the mathematical model of soil thermal storage and release processes was established. The simulative calculation was worked out using the model of solid phase increasing method. The technical feasibility of the application was analyzed and theoretical support was supplied for the application of the integrated soil thermal storage and GCHP system.