- What is district heating and cooling?
- Advantages of district heating and cooling
- Aiming for the further development of Minato Mirai 21
Home ＞ For building owners and corporations ＞ Supply system ＞ Central Plant
Central Plant（Supply system）
The Central Plant situated close to Sakuragicho Station is a facility with six above-ground and one below-ground floors. It started operation concurrently with the start of heat supply in April 1989.
The boiler and chiller equipment includes a large-scale latent heat storage system, as well as electric turbo chillers, absorption chillers, steam turbine-driven turbo chillers, water tube boilers, and flue and smoke tube boilers. We use this highly reliable equipment to provide clients with stable heating and cooling services.
Heat source system diagram
Large-scale latent heat storage system
This large-scale latent heat storage system, known as STL (Storage of Latent Heat), is a type of ice thermal storage system. It uses large quantities of “nodules,” spherical capsules made of high density polyethylene with a diameter of 77 mm, which contain water. Compared with water storage, it offers highly efficient thermal storage with a large capacity in a small space.
- It provides thermal storage capacity of 30,000 refrigeration-tons (3,000 refrigeration-tons × 10 hours).
- It is designed to release heat with performance of 5,000 refrigeration-tons × 6 hours, making it effective for responding to peak loads.
- Another characteristic is that when storing heat, the boiler and chiller equipment can operate at full capacity during the cool nighttime period, achieving very high efficiency.
- It also has excellent readiness characteristics for use as emergency backup.
- It contributes to the smoothing of electric power usage by shifting daytime load to nighttime, besides reducing heating costs through the use of nighttime power.
