中国科学技术大学学报 ›› 2015, Vol. 45 ›› Issue (6): 485-489.DOI: 10.3969/j.issn.0253-2778.2015.06.009

• 论著 • 上一篇    

地下换热器变热流传热模拟研究

汤昌福,张文永,朱文伟,俞显忠,刘桂建   

  1. 1.安徽省煤田地质局勘查研究院,安徽合肥 230088;2.合肥市浅层地热能工程技术研究中心,安徽合肥 230088; 3.中国科学技术大学地球与空间科学学院,安徽合肥 230026
  • 收稿日期:2015-03-16 修回日期:2015-06-04 接受日期:2015-06-04 出版日期:2015-06-04 发布日期:2015-06-04
  • 通讯作者: 刘桂建
  • 作者简介:汤昌福,男,1982年生,博士. 研究方向:资源与环境保护. E-mail: cftang@mail.ustc.edu.cn
  • 基金资助:
    住房城乡建设部软科学项目(2015-R1-012),安徽省住房城乡建设科学技术计划项目(2015YF-06)资助.

Heat transfer simulation for ground heat exchangers with varying heat fluxes

TANG Changfu, ZHANG Wenyong, ZHU Wenwei, YU Xianzhong, LIU Guijian   

  1. 1.Exploration Research Institute, Anhui Provincial Bureau of Coal Geology, Hefei 230088, China; 2.Hefei Research Center of Shallow Geothermal Engineering and Technology, Hefei 230088, China; 3.School of Earth and Space Science, University of Science and Technology of China, Hefei 230026, China
  • Received:2015-03-16 Revised:2015-06-04 Accepted:2015-06-04 Online:2015-06-04 Published:2015-06-04

摘要: 基于均一入口流体温度假设和叠加原理建立了地下换热器变热流情形地下传热模拟半解析方法,并进行了验证,研究了热不平衡和热干扰对地下换热器动态特性的影响.研究表明,地下换热器各钻孔换热能力与热干扰大小有关.若地下换热器每年往地下排放的热量大于从地下吸取的热量,地下换热器出口流体温度呈现逐年上升的趋势.工程实例运行模拟表明,地下换热器连续运行10 a,其出口流体温度与第一年相比上升了约08 ℃;地下换热器钻孔受到的热干扰越大,散热能力越差.

关键词: 地下换热器, 变热流, 叠加原理, 模拟

Abstract: Based on the superposition principle and uniform inlet fluid temperature assumption, the semi-analytical solution to heat transferring of ground heat exchangers (GHEs) with varying heat fluxes was built and validated. The effects of load imbalance and heat interference were further examined. Results indicate that the heat transfer capacity for individual boreholes in GHE depends on the strength of heat interference. If the heat rejected into the ground is greater than the heat absorbed from the ground, the outlet fluid temperature of GHE increases gradually every year. Case study indicates that the outlet fluid temperature of GHE, compared with that in the first year, increases about 0.8 ℃ in the 10th year. The capacity of heat rejection for the GHE becomes smaller with stronger heat interference.

Key words: ground heat exchanger, varying heat flux, superposition principle, simulation

中图分类号: