研究了回收和再利用伦敦地铁隧道冷却产生的废热作为区域供暖系统热源的可能性。为了使未来的地下环境保持在安全的温度水平，需要对伦敦的地下系统进行冷却。目前在整个网络中应用的冷却方法包括在通风井、空气处理机组（AHU）和隧道中的冷却管中使用冷却盘管，尽管后者仅在理论基础上应用。这些系统使用冷冻水通过热交换器冷却隧道中的空气。冷冻水通常由冷却器产生，热量被排到大气中。目前，区域供暖网络仅占英国总用热量的2%左右。然而，目前在伦敦有许多由地方政府管理的区域供暖计划。 热量通常由热电联产（CHP）发电厂提供，但计划在未来扩大这些方案，并利用二次废热源。本项目由Innovate UK资助，研究将伦敦地下火车隧道的冷却与向区域供暖网络的传热相结合的潜在好处。计划使用水对水热泵将热量传输至区域供暖网络，而不是使用风冷式冷却器冷却水，以冷却地下隧道中的空气。这将大大减少各个网络的冷却和加热所需的总能量输入。据估计，至少有15兆瓦的废热可用于冷却伦敦的地下系统。 为了评估拟议方法的效益，将开发一个能源、碳和全寿命成本计算模型，以估算一系列配置和运行条件下的能源、碳和成本节约。还将进行跨季节分析，以确定收益在一年中如何变化。报告了基于案例研究的模型细节和潜在效益的初步计算结果，并介绍了计划的热回收系统的配置。当前项目的结果将用于指导中试规模试验的设计。这种热回收方法可以推广到其他二次废热源。引文:2017年冬季会议，内华达州拉斯维加斯，会议论文

The potential for recovery and reuse of waste heat from cooling London's underground train tunnels as a heat source for district heating systems has been investigated. Cooling of London's underground system is needed to maintain the future underground environment at safe temperature levels. Cooling methods currently being applied across the network include the use of cooling coils in ventilation shafts, air handling units (AHUs) and cooling pipes in tunnels, although the latter method has only been applied on a theoretical basis. These systems use chilled water to cool the air in the tunnels by means of heat exchangers. The chilled water is normally generated using chillers and heat is rejected to atmosphere. District heating networks currently account for only about 2% of total heat used in the UK. However, there are a number of local government managed district heating schemes operating in London, at present. Heat is generally supplied by combined heat and power (CHP) generating plant, but it is planned to expand these schemes and to make use of secondary waste heat sources in the future. The present project, which is funded by Innovate UK, investigates the potential benefits of combining cooling of London's underground train tunnels with the transfer of heat to district heating networks. Instead of using air cooled chillers to cool the water to provide cooling to the air in the underground tunnels, it is planned to use water to water heat pumps to transfer the heat to a district heating network. This should significantly reduce the total energy input required for both the cooling and heating of the respective networks. It has been estimated that there is at least 15 MW of waste heat available from cooling London's underground system. To evaluate the benefits of the proposed approach, an energy, carbon and whole life costing calculator model will be developed to estimate energy, carbon and cost savings for a range of configurations and operating conditions. An inter-seasonal analysis will also be carried out to determine how the benefits vary during the year. Details of the model and the results of preliminary calculations of the potential benefits based on a case study are reported, and the configuration of the planned heat recovery system is presented. The results from the current project will be used to inform the design of a pilot scale trial. This heat recovery approach could be extended to other secondary waste heat sources.