空气源蓄热式土壤源热泵系统模拟研究

Simulation Study of Ground Coupled Heat Pump System with Seasonal Air Source Heat Storage

提出了空气源蓄热式土壤源热泵系统,该系统将夏季自然空气热量蓄存于土壤中,冬季再由热泵取出供热,即实现了可再生能源的移季利用又能解决严寒地区应用土壤源热泵引起的土壤全年总取热量与总排热量失衡的问题。为研究系统运行特性,建立了系统全年仿真模型,并以哈尔滨某建筑为例进行了模拟计算。结果表明,经移季蓄热埋管管壁处土壤温度升高了3.2℃,显著改善了热泵运行条件,使得供暖保证率达到了99.5%,热泵性能系数为3.99,系统全年供热性能系数为2.56。证明了该系统在严寒地区应用是可行的。

A novel ground coupled heat pump system with seasonal air source heat storage is presented. In summer, natural air heat is injected into the soil around ground heat exchangers, then which is extracted for building heating by heat pump in winter. In this way, the renewable energy in summer is transferred to winter, while the imbalance problem between the total injected heat into soil and the total extracted heat from soil in a year could be solved due to using ground source heat pump system in severe cold area. For find out the system performance, the simulation model of the system is developed, and the calculation is carried out in a single building in Harbin. The results show that the soil temperature at the tube wall raised 3.2± by air seasonal heat storage ,which obviously improved the operation condition of the ground source heat pump, the heating ensure rate arrived 99.5%, the heating performance coefficient of the heat pump and that of the system for whole year was 3.99 and 2.56, respectively. It is proved to be feasible for the application of the presented system in severe cold area.