铁道科学与工程学报2016，Vol.13Issue(8)：1593-1599,7.
围岩热物性对隧道衬砌热交换器换热的影响研究
Influence of surrounding rocks thermal parameters on the thermal performance of tunnel lining heat exchangers
刘胜1
作者信息
- 1. 湖南省交通科学研究院，湖南 长沙410015
- 折叠
摘要
Abstract
Based on the heat transfer characteristics of tunnel lining exchanger,this paper estabilished three-di-mensional heat transfer numerical model which fully considers convective heat transfer between air and lining, heat transfer between heat carrier liquid and surrounding rock and the heat conduction in surrounding rock.The accuracy of numerical results was verified with the field test monitoring data.The influence of surrounding rock thermal physical parameters(such as thermal conductivity,specific heat capacity)on the heat exchange rate of surrounding rock was studied to provide guidance for the design of the tunnel lining GHEs.The geothermal energy output of tunnel lining GHEs presents a linear variation with the thermal conductivity increase,and the growth rate does not change with the running time.The heat exchange pipe should be laid in the surrounding rock with good thermal conductivity.The geothermal energy output of tunnel lining GHEs decreases exponentially with the increase of flow rate.The effect of specific heat capacity increase on geothermal energy output gradually weaken with the increase of running time,it is better that the ground source heat pump system adopts the intermittent op-eration mode.关键词
隧道/地源热泵/换热器/围岩热物性参数/换热Key words
tunnel/heat pump/ground heat exchangers/thermal physical parameters/heat exchange分类
交通工程引用本文复制引用
刘胜..围岩热物性对隧道衬砌热交换器换热的影响研究[J].铁道科学与工程学报,2016,13(8):1593-1599,7.
