Metro stations in Tokyo use enormous amounts of energy for cooling, mainly due to heat emissions from passengers, the waste heat from air-conditioned trains and lighting equipment. Each passing train moves a large amount of air, so the platform area requires a lot of energy for cooling.
In the newly built Tokyo Shibuya Station, waste heat is dissipated by natural ventilation, while the surface temperatures of ceilings and floors in the platform areas are cooled below air temperature using Clina capillary tube mats. This ensures a comfortable temperature level for passengers. As a result, it is the first radiation-cooled underground station in the world, with the goals of high comfort, better energy efficiency and ease of maintenance.
Tokio Shibuya metro station