基于TRNSYS的地源热泵优化设计仿真模拟分析

Simulation Analysis of Ground Source Heat Pump Optimization Design Based on TRNSYS

利用TRNSYS瞬时仿真模拟软件建立地源热泵低温地板辐射供冷供热系统模型,对严寒地区办公建筑地源热泵低温地板辐射系统长期运行情况进行模拟,结合连续性实验,对软件模拟和实验得到的数据进行分析,并用实验得到的数据对数值模拟得到的结果进行验证.通过对不同机组选型、不同地埋管换热器钻孔个数、不同单位井深换热量工况下,系统长时间连续运行时机组平均COP以及土壤温度场进行模拟,发现机组容量越接近37.5 kW,COP越高,钻孔15~20个、单位井深换热量18~24 W时可以达到最佳运行效率.

Using TRNSYS transient simulation software,a ground source heat pump low-temperature floor radiation cooling and heating system model was established.The long-term operation of ground source heat pump low-temperature floor radiation system of office buildings in severe cold regions was simulated.Combined with continuous experiments,the data obtained from the software simulation and the experiment was analyzed,and the results obtained from the numerical simulation were verified by the experimental data.The different unit selection,the numbers of boreholes for different buried tube heat exchangers,the unit’s average COP and soil temperature field during long-term continuous operation of the system under different unit depth heat transfer conditions were simulated.It was found that when the unit capacity was closer to 37.5 kW,the unit’s COP became higher.When the numbers of boreholes were 15-20,and the unit well depth heat transfer capacity was 18-24 W,the operating efficiency could be higher.