埋深对地源热泵水平连接管夏季换热性能的影响
Impact of buried depth on heat transfer performance of horizontal connection pipe in ground- sourceheat pump systems in summer
摘要：
建立了接近实际情况的三维水平连接管模型，通过实验验证了该模型的准确性。利用该模型分析了埋深对水平连接管夏季换热性能的影响，结果显示，运行24 h后埋深0.5 m和1.0 m的水平连接管的出水管从土壤吸热，导致竖直地埋管出水温度经过水平连接管后升高；而埋深1.5 m和2.0 m的水平连接管的进水管和出水管均向土壤放热，且换热量比埋深0.5 m和1.0 m时大大提高，占整个换热器换热量的比例也相应提高。
Abstract：
Establishes a 3D model of the horizontal connection pipe close to actual situation, and verifies the model with experiments. Based on the model, analyses the impact of the depth on heat transfer performance of horizontal connection pipe in summer. The result indicates that the outlet pipe of horizontal connection pipe embedded in 0.5 m and 1.0 m absorbs heat from soil, so that the water temperature out of vertical ground heat exchanger increases; the inlet and outlet pipes of horizontal connection pipe embedded in 1.5 m and 2.0 m both release heat to soil, and the heat exchange rate and proportion are largely increased.
Keywords:ground-sourceheatpump,burieddepth,horizontalconnectionpipe,heattransferperformance,inletpipe,outletpipe