文档介绍：合肥地区垂直U型埋管换热器
实验分析及模拟
安徽建筑工业学院胡宁王晏平李雪飞汪志远
摘要本文选取60m深垂直U型埋管进行了理论分析,建立了垂直U型地埋管换热器以及周围土壤温度场的数学模型,并实验研究了合肥地区夏季典型气候条件下不同运行模式下地埋管换热器的换热性能以及换热器周围温度场的变化情况。最后利用有限元分析软件ANSYS软件对合肥地区地埋管换热器长期运行工况进行了模拟,给地源热泵的施工提供了一定的参考价值。
关键词地源热泵系统,垂直U型地埋管换热器,模拟,ANSYS
Experimental and Simulant Study on Vertical U-Tube
Underground Heat Exchanger in Ground Source
Heat Pump System in Hefei
Anhui University of Architecture Hu Ning Wang Yanping Li Xuefei Wang zhiyuan
Abstracts A sixty meters Vertical U-tube heat exchanger was theoretically analysed in this paper,and a mathematic model of Vertical U-tube heat exchanger and the surround temperature field was experimentally studies heat transfer performance of the Ground heat exchange(GHE) and the surround temperature distribution under different operation modes in the typical climate of Hefei. Last, the finite element analysis software ANSYS was used to simulate the long-time operation mode of the GHE, which affords reference to the construction of the GSHP system.
Key words ground-source heat pump system; vertical U-tube underground heat exchangers;
simulation; ANSYS
1 前言
地源热泵是以地表能为热源(或热汇),通过输入少量的高品位能源(如电能),实现低品位热能向高品位热能转移的热泵空调系统,是真正的“绿色能源”[1]。与传统空调系统相比,地源热泵空调系统主要区别在于增加了一个地热换热器,即地下埋管环路。因此,对地源热泵系统来说,其关键的就是地下埋管换热器,它的性能直接关系到整个系统的工作效率。以往的研究更多注重的是换热器本身的换热特性分析,对实验数据的依赖性比较大,特别是对于合肥这样全年供冷负荷大于供暖负荷地区,针对换热器周围土壤温度场以及系统长期运行工况的研究并不多,主要是由于以往的分析手段对系统长