回水管保温对竖直埋管换热器换热性能的影响分析

In the vertical buried tube ground-source heat pump system application, hot short-circuit and attenuation of the return water temperature in saturated layer makes heat transfer performance of the underground heat exchanger drop. According to the custom of the single u-shaped ground-source heat pump system for experimental platform, the paper does lot comparison and analysis under different conditions of experimental with heat insulation taken and didn’t take, and the result shows that the insulation of return water tube influence the return water temperature, the technical of heat exchanger can improve the single-hole heat capacity.