渗流对地铁源热泵前端毛细管换热器性能及围岩温度场的影响  

Effect of seepage on the performance of the front-end capillary heat exchanger in subway source heat pump system and the surrounding rock temperature field

作　　者：季永明 綦浩宇 吉程帆 焦嘉琛 尹振峰 胡松涛[1] JI Yongming;QI Haoyu;JI Chengfan;JIAO Jiachen;YIN Zhenfeng;HU Songtao(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266525,China)

机构地区：[1]青岛理工大学环境与市政工程学院,青岛266525

出　　处：《青岛理工大学学报》2024年第2期125-132,共8页Journal of Qingdao University of Technology

基　　金：国家自然科学基金资助项目(52108079)。

摘　　要：地铁长期运行会引起隧道内的热堆积,影响地铁的安全高效运行。以毛细管为前端换热器的地铁源热泵系统是解决上述问题的有效技术之一。基于某示范工程,建立了隧道衬砌内毛细管换热器仿真模型;分析了典型工况下,渗流对其传热特性及隧道围岩温度场的影响。结果显示,渗流会显著扩大换热器的热影响范围,最远可达围岩下游70 m处;与无渗流工况相比,渗流可显著提高换热器的效率,且二者逆流时,提升效果更明显,供冷季为3.20倍,供暖季为2.55倍;渗流可显著减弱围岩的热堆积。本研究可为地铁源热泵前端换热器的设计提供理论支撑。Long-term operation of subway will cause heat accumulation in the tunnel,which will affect the safe and efficient operation of subway.The subway source heat pump system with front-end capillary heat exchanger is one of the effective technologies to solve the above problem.Based on a demonstration project,a simulation model of the capillary heat exchanger in the tunnel lining was established.The influence of seepage on the heat transfer characteristics of the capillary heat exchanger and the surrounding rock temperature field under typical working conditions was analyzed.The results show that the seepage can significantly expand the heat influence range of the heat exchanger,up to 70 m downstream of the surrounding rock.Compared with the condition without seepage,the efficiency of the heat exchanger can be significantly improved by seepage,and the improvement effect is more obvious when the two flow upstream,which is 3.20 times in the cooling season and 2.55 times in the heating season.The thermal accumulation of surrounding rock can be significantly weakened by seepage.This study can provide theoretical support for the design of the front-end heat exchanger of the subway source heat pump system.

关 键 词：地铁 热堆积 供热 换热器 渗流 热泵 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程] TU833.1