多口U型地埋管释热性能数值模拟及实验研究

NUMERICAL SIMULATION AND EXPERIMENTAL STUDY OF HEAT RELEASE PERFORMANCE OF MULTI PORT U-TYPE BURIED PIPES

采用CFD数值模拟方法对单口和多口U型地埋管井三维稳态换热性能进行模拟研究,分析管内流速、地埋管进水温度、土壤温度以及管井数量等因素对地埋管井释热性能的影响。然后采用实验方法,测试多口地埋管井释热性能和土壤温度变化规律。最后研究得出管内流速、进水温度、土壤温度等因素对地埋管井释热性能的影响以及在实际运行工况下4口60 m地埋管井换热量和土壤温度变化规律。

The three- dimensional steady- state heat transfer performances of single port and multi- port U- type buried pipes were simulated by the CFD numerical simulation method to analyze the effect of ,tifferent factors, such as the flow speed in pipe, inlet water temperature of the buried pipe, soil temperature and the number of pipes on the heat release performance of buried pipe well. Then the experimental method was used to test the heat release performance of muhi- port buried pipe well and temperature change of soil. Lastly, the effect of different factors, such as the flow speed in pipe, inlet water temperature, soil temperature etc. on the heat release performance of buried pipe well, as well as the heat exchanging quantity and change law of soil temperature of four port buried pipe wells with 60 m depth under the actual operating condition were obtained.