地铁废热利用研究进展与关键问题

Research progress and key issues of waste heat utilization in subway

地铁开发是快速高效地缓解“城市综合征”的途径之一.然而,地铁的大量开发和长期使用,将导致大量余热堆积在地下构筑物周围岩土中,形成热堆积问题,引起地下温度上升,最终使地下热环境恶化,破坏原有生态平衡.分析了地铁系统在地下产生热堆积问题的原因,重点介绍了国内外关于地铁废热回收的方法与成果,指出了地铁废热利用存在的关键问题与适用于地铁废热利用的系统,提出了未来的地铁废热利用研究方向.

Subway development is one of the most efficient ways to relieve the“urban syndrome”.However,due to the large-scale development and long-term use of underground space,a large amount of waste heat will be accumulated in the rock around the underground structure,causing the phenomenon of heat accumulation.As a consequence of that,the underground temperature increases year over year.Eventually the underground heat environment will deteriorate and the original ecological balance will be broken.This article explains the causes of underground heat accumulation problem,and introduces the methods and achievements of subway waste heat recovery at home and abroad.This article also points out the key problems in subway waste heat utilization,and the applicable system of the utilization.The future research direction of subway waste heat is also proposed in this article.