Located near Sakuragicho Station, Center Plant is a facility with six floors above ground and one below. It began supplying heating and cooling in April 1989.
Center Plant’s heating and cooling equipment includes a large-scale ice storage system, electric centrifugal chillers, absorption chillers, water-pipe boilers, and furnace-type fire-tube boilers, providing customers with stable supplies of heating and cooling.
In January 2019 the plant introduced a gas-engine cogeneration system, achieving further energy savings by reducing peak electrical power and recovering waste heat.
Diagram of the Heat-source System
Equipment capacity
| Equipment | Specifications | Units | Capacity | Year installed | |
|---|---|---|---|---|---|
| Chillers | Inverter centrifugal chillers | 5,400 RT | 1 | 5,400 RT | 2016 |
| 5,400 RT | 1 | 5,400 RT | 2023 | ||
| Heat-storage electric centrifugal chillers (2,000 RT while storing heat) | (2,650 RT while catching up) | 1 | 2,650 RT | 2023 | |
| Heat-storage electric centrifugal chillers (2,000 RT while storing heat) | （For heat storage only） | 1 | ー | 2025 | |
| Double-utility absorption chillers | 3,000 RT | 2 | 6,000 RT | 2015 | |
| 3,000 RT | 2 | 6,000 RT | 2024 | ||
| Boilers | Furnace-type fire-tube boilers | 9.6 t/h（city gas 13A） | 1 | 9.6 t/h | 1989 |
| 15.0 t/h（city gas 13A） | 1 | 15.0 t/h | 1993 | ||
| 24.0 t/h（city gas 13A） | 1 | 24.0 t/h | 1989 | ||
| 36.0 t/h（city gas 13A） | 1 | 36.0 t/h | 2021 | ||
| Water-tube boilers | 40.0 t/h（city gas 13A） | 1 | 40.0 t/h | 1993 | |
| 40.0 t/h（city gas 13A） | 1 | 40.0 t/h | 1994 | ||
| Heat-storage tanks | Ice storage tanks | 15,000RTh | |||
| （While storing heat 3,000RT×10hours） | 2 | 30,000RTh | 1994 | ||
| （While dissipating heat 5,000RT×6hours） | |||||
| Cooling towers | Open-diversion forced-draft | 4cells | 11,500CT | 1989 | |
| 4cells | 11,500CT | 1993 | |||
| 2cells | 8,029CT | 1994 | |||
| 2cells | 8,452CT | 2016 | |||
| Receiving transformers | Gas-insulated super-high-voltage transformer | 1 | 20,000kVA | 2017 | |
| Voltage Primary：66ｋV，Secondary：6.6ｋV | 1 | 20,000kVA | 2018 | ||
| Co-generation systems | Gas-engine generator | 2,000kW | 1 | 2,000kW | 2019 |
| Exhaust-gas boiler | 0.929 t/h | 1 | 0.929 t/h | 2019 | |
| Single-utility absorption chiller | 68.7 RT | 1 | 68.7 RT | 2019 | |