某大型热泵地埋换热器换热模拟研究

Underground Heat Transfer Simulation Study of a Large- scale Ground Source Heat Pump Exchanger

本文首先建立了德阳火车站地源热泵地埋换热器模型。然后利用ANSYSY有限元分析软件进行网格划分和数值模拟,通过实测进出口温度及单位井深换热量等值与相关模拟值对比,验证模型的正确性。在此基础上了主要模拟分析了流体不同入口流速对地埋换热器换热特性的影响,不同土壤物性参数对换热特性的影响。此外,还模拟研究了某一非稳态运行时间段内,不同径向处土壤温度分布。

Firstly, this paper established a ground source heat pump underground heat exchanger model of Deyang rail -way Station.Then use finite element analysis sof tware ANSYSY to mesh the model and get the numerical simulation re-sults.On this basis, the paper simulates the impact of different inlet velocity for fluid underground heat exchanger char -acteristics, the effects of different soil physical parameters on the heat transfer characteristics .In addition, the paper simulates the non-steady-state operation period of the soil at different radial temperature distribution.