基于全尺度线热源解的地热换热器集群的温度响应-中南大学学报.PDF

第 48 卷第 10 期 中南大学学报( 自然科学版) Vol.48 No.10 2017 年 10 月 Journal of Central South University (Science and Technology) Oct. 2017 DOI: 10.11817/j.issn.1672−7207.2017.10.035 基于全尺度线热源解的地热换热器集群的温度响应 1 1 1 2 李平 ，李旻 ，马卫武 ，肖莲荣 (1. 中南大学 能源科学与工程学院，湖南 长沙，410083； 2. 湖南亚华乳业有限公司，湖南 长沙，410013) 摘要：针对地热换热器集群的跨尺度传热难题，运用匹配渐进展开法和叠加原理，构建全尺度线热源解。计算 2 种钻孔布置形式(单行和矩阵) 的温度响应，分析钻孔间距对地下温度演化过程的影响。从工程应用的角度探讨简 化计算地热换热器集群平均温度的问题。研究结果表明：所提出的全尺度线热源解扩展了国内外现有解析解的适 用范围。 关键词：地源热泵；地埋管换热器；温度响应函数；全尺度模型 中图分类号：TU833+ .3 文献标志码：A 文章编号：1672−7207(2017)10−2817−06 Temperature responses of ground heat exchanger clusters based on full-scale line-source solution 1 1 1 2 LI Ping , LI Min , MA Weiwu , XIAO Lianrong (1. School of Energy Science and Engineering, Central South University, Changsha 410083, China; 2. Hunan AVA Dairy Industry Co. Ltd., Changsha 410013, China) Abstract: In order to tackle the problem of heat transfer of GHE spanning diverse time-space scales, a full-scale line-source solution was reported for heat transfer of ground heat exchanger (GHE) clusters, which was an analytical solution that was developed from the method of matched asymptotic expansions and the principle of superposition. Temperature-response curves of line- and matrix-arranged GHE clusters were presented and