基于监测数据的土壤源热泵系统设计优化分析

针对建筑中地源热泵系统实际地下换热过程复杂、设计困难等问题,以苏州地区某浅埋式地源热泵系统为研究对象,运用TRNSYS软件搭建地源热泵仿真模型,对一定条件下埋管内冷却水流速与地源热泵系统性能的耦合关系进行了模拟分析。仿真结果表明相同蓄热体积下埋管深度对系统性能影响较小。增大冷却水流速有利于土壤温度恢复,但系统耗电量增加。该浅埋式地源热泵系统冷却水流速1~2 m/s均在合理范围内,且埋管深度越大,最佳设计流速越小。

Optimization Analysis on Design of Ground Source Heat Pump System Based on Monitoring Data

According to the fact that actual heat transfer process of ground source heat pump heat exchanger is complicated and difficult to design,a shallow buried ground source heat pump system located in Suzhou has been taken as a research object by building a simulation model on TRNSYS.The coupling relationship between the cooling water velocity in the buried pipe and the performance of ground source heat pump system is simulated and analyzed under certain conditions.The simulation results show that the buried pipe depth has little influence on the system performance under the same heat storage volume and the increase of flow rate of cooling water is favorable to the recovery of soil temperature,but the power consumption of the system is increased.The cooling water velocity of the shallow buried ground source heat pump system is within a reasonable range of 1~2 m/s,and the greater the buried pipe depth is,the smaller the optimal flow rate is.