竖直U型地埋管的换热性能分析

Analysis on Thermal Performance of Vertical U-pipe Ground Heat Exchanger

竖直U型地埋管换热器是地源热泵系统的重要组成部分,其换热性能直接影响地埋管设计参数的确定。本文以有限长线热源理论为基础,采用叠代法,计算了竖直U型地埋管的换热特性,并进行了实验验证。在此基础上,对比分析了各相关参数对单U和双U并联地埋管换热器换热特性的影响,为准确确定竖直U型地埋管换热器的换热性能、进行换热器设计提供了必要的参考。

Vertical U-pipe ground heat exchanger is an important component of ground source heat pump system, the relative design parameters were determined by its thermal performance. In this paper, based on the finite line-source model, the thermal performance of vertical U-pipe ground heat exchanger was calculated by applying the iterative algorithm ,which was validated with the experimental data. According to the calculated results, the influences of single U-pipe and double U-pipe ground heat exchanger on thermal performance were analyzed and compared, which was helpful for the design of heat exchanger.