制冷工况下水平埋管换热器运行试验研究  

Experimental analysis on operation process of horizontal ground heat exchanger under cooling provision

作　　者：曾召田[1,2] 唐双慧 赵艳林[1,2] 徐云山[1] 吕海波[1,2] 

机构地区：[1]桂林理工大学广西建筑新能源与节能重点实验室,广西桂林541004 [2]广西大学土木建筑工程学院防灾减灾研究所,南宁530004

出　　处：《土木建筑与环境工程》2016年第4期46-52,共7页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金(41502284;51568014;41272358);广西自然科学基金(2013GXNSFBA019233);广西建筑新能源与节能重点实验室项目(桂科能15-J-21-1)~~

摘　　要：通过夏季工况的地源热泵运行试验,对运行过程中水平埋管的换热性能参数、试验场地周围气象因素和换热过程中土体的温湿度变化等因素进行实时监测,探讨了地源热泵运行过程中水平埋管换热器热交换性能及其周围土壤的温、湿度场变化规律。研究结果表明,地源热泵间隙运行有利于土壤温度场的恢复,随着停机时间的增加,水平埋管与周围土壤的热交换能力明显提高;气候变化对水平埋管周围土壤的温度场分布具有显著影响,随着埋深的递减,土壤温度受气候变化的影响越明显;水平埋管周围土壤温度的变化幅度随着与埋管距离的增加呈递减趋势,其影响半径为1.0m左右;热交换对水平埋管周围土壤湿度场的影响不明显,但大气降雨引起的地表水入渗对土壤湿度场的分布具有显著影响。Experiment on ground source heat pump（GSHP）was conducted in summer to monitor the factors such as the heat exchange performance parameters of horizontal ground heat exchangers（GHEs）,the climatic conditions around the testing site and variations of soil temperatures and moistures during theoperation process.The heat exchange performance of horizontal GHEs as well as the variation laws of temperature and moisture fields around their surrounding soils was explored.The results showed that the intermittent operation model of GSHP was beneficial to the recovery of soil temperature field.The heat exchange capacity of horizontal GHEs from their surrounding soils improved significantly with the increase of downtimes.The climatic conditions had an obvious influence on the distributions of soil temperature field around the horizontal GHE.The influence of climatic conditions on soil temperature was becoming obvious with the decrease in burial depth.The changing amplitude of soil temperature field decreased with the increase in distance from the horizontal GHE was found,resulting in a heat influence range of the GHE with a radius of about 1.0m.Finally,the impact of heat exchange of horizontal GHE to soil moisture field was in-apparent.However,the surface water infiltrating caused by rainfall was an obvious influence factor on the variation of soil moisture field.

关 键 词：地源热泵 水平埋管换热器 热交换性能 土壤温湿度场 水分迁移 

分 类 号：TU413[建筑科学—岩土工程]