本文以伦敦为例，介绍了英国一个合作研究项目的结果，该项目侧重于地下铁路隧道的余热回收。该项目的目的是调查将伦敦地下铁路隧道的冷却与废热回收系统相结合的可行性。然后，回收的热量将被输送到热泵，以提高其温度，然后再输送到区域供热网络进行再利用。本文介绍了联合供冷供热系统的设计方案，以及为评估其性能而开发的模型。 本文介绍了该研究的一系列结果，并强调了在能源、碳和成本节约方面的潜在效益。本文还介绍了一个相关项目，该项目基于该案例研究，旨在确定和量化一系列城市地下基础设施（如下水道、电缆隧道以及地下铁路隧道）的余热回收潜力。将根据当地终端用户热需求的大小和位置，研究潜在的热回收和输送方法。这两个项目的重点都是伦敦的余热回收，然而，其结果适用于大多数拥有地下基础设施系统的城市，包括英国其他地方和世界各地。 引文:2018年冬季会议，伊利诺伊州芝加哥，会议论文

This paper describes the results from a collaborative research project in the UK, focussing on the recovery of waste heat from underground railway tunnels, using London as a case study. The aim of the project was to investigate the feasibility of combining cooling of London’s underground railway tunnels with a waste heat recovery system. The recovered heat will then be transferred to a heat pump to upgrade its temperature, before delivery to a district heating network for reuse. The paper describes the proposed design for the combined cooling and heating system and the model that has been developed to evaluate its performance. A range of results from the study are presented and the potential benefits in terms of energy, carbon and cost savings are highlighted. The paper also introduces a related project, which builds on this case study and aims to identify and quantify the potential for waste heat recovery from a range of urban subterranean infrastructures, such as sewers and cable tunnels, as well as underground railway tunnels. Potential heat recovery and delivery methods will be investigated, in relation to the size and location of local end-user heat demand. Both of these projects focus on waste heat recovery in London, however, the results are applicable to most cities with underground infrastructure systems, both elsewhere in the UK and around the world.