闭式湖水源热泵埋管深度的影响研究

Effect of the Buried Tube Depth on Closed-loop Lake Water Heat Pump System

针对南京工程学院的闭式湖水源热泵的埋管深度问题,建立了三维传热模型。使用FLUENT软件模拟了不同埋管深度对湖水温度场的影响,同时计算了相应条件下的机组COP(Coefficient of Performance)。研究结果表明,埋管深度越大,闭式湖水源热泵温排水对湖水温度影响越小;闭式湖水源热泵的COP随着埋管深度的增大而增大。结合研究结果,对闭式湖水源热泵的埋管方式提出了相应的建议。

For the problem of buried tube depth in closed-loop lake water heat pump system in Nanjing Institute of Technology, three-dimensional heat transfer model is built. And Fluent is used to simulate the influence of the different buried tube depth on the temperature field of lake. Meanwhile, COP( Coefficient of Performance) of lake water heat pump is calculated accordingly. The results show that the deeper buried tube leads to the less influence of the discharge water from closed-loop lake water heat pump to lake temperature. Besides, with the increase of buried tube depth, the performance of closed-loop lake water heat pump is increasing. According to the results, some suggestions about the ways of buried tube in close-loop lake water heat pump system are put forward.