不同开停比下地埋管换热器运行特性研究

地源热泵在夏季运行工况中,连续运行可能会导致土壤温度持续升高,机组运行工况恶化。本文对不同开停比下地源热泵U型地埋管地下换热器的传热过程进行了数值模拟,探求不同开停比下地埋管换热器内水温和地埋管管壁温度的变化规律,以期找到地下换热系统运行优化的最佳手段。

Study on the Operation Characteristics of Ground Heat Exchanger with Different Run-stop Rations

Continuous operation will lead to the soil temperature continues to rise and therefore deteriorate the unit operation conditions for ground-source heat pump system during the summer.In this paper,the software of CFD was used to simulate the heat transfer process of the U-tube heat exchanger at intermittent operation mode,also the change laws of water temperature in pipe heat exchanger and wall temperature of buried tube at different run-stop rations were discussed.To draw a conclusion,the best means to optimize the opeation of ground heat exchanger system were expected to be found out.