地下水温数值模拟在水源热泵工程设计中的应用
Application of numerical simulation of underground water temperature to groundwater source heat pump engineering
摘要：
为分析沈阳市某小区地下水地源热泵项目复合井结构的合理性和地下水热贯通程度，建立了地下水流与温度耦合数值模型，对不同换热温差下的地下水温变化趋势进行了模拟预测。模拟结果表明，采用复合井结构可以满足水源热泵工程取回水要求，且5 ℃换热温差比7 ℃更合理、安全。经过一个供暖期运行和对地下水温的实际监测，证明了模拟结果的准确性。
Abstract：
Establishes a coupling numerical model of underground water flow and water temperature for analysing the rationality of designing structure of the composite wells and the extent of underground water heat leak for the groundwater source heat pump (GSHP) engineering of a residential quarter in Shenyang, and simulates and forecasts the underground water temperature change trend for different heat transfer temperature differences. The results show that the structure of composite well can meet the requirements of injecting and pumping for the GSHP engineering, and adopting 5 ℃ of temperature difference is more rational and safe than 7 ℃. Based on the running of a heating period and the actual monitoring to underground water temperature, the accuracy of simulated results is proved.
Keywords:groundwater source heat pump, underground water temperature, numerical simulation, composite well, heat leak, heat transfer temperature difference