No. 2 Plant, located on the 4th and 5th basement floors of Queen’s Square Yokohama, began operation in July 1997.
It provides customers with stable supplies of heating and cooling using electric centrifugal chillers, absorption chillers, water-tube boilers, and furnace-type fire-tube boilers. It has the largest capacity of the three plants.
Diagram of Heat-source System
Equipment capacity
| Equipment | Specifications | Units | Capacity | Year installed | |
|---|---|---|---|---|---|
| Chillers | Inverter centrifugal chillers | 5,400 RT | 1 | 5,400 RT | 2023 |
| 5,400 RT | 1 | 5,400 RT | 2024 | ||
| Electric centrifugal chillers | 4,000 RT | 1 | 4,000 RT | 2008 | |
| 4,400 RT | 1 | 4,400 RT | 2023 | ||
| 5,000 RT | 1 | 5,000 RT | 2009 | ||
| 5,400 RT | 2 | 10,800 RT | 2021 | ||
| Double-utility absorption chillers | 3,000 RT | 2 | 6,000 RT | 2010 | |
| 3,000 RT | 1 | 3,000 RT | 2011 | ||
| 3,000 RT | 1 | 3,000 RT | 2021 | ||
| 3,000 RT | 1 | 3,000 RT | 2022 | ||
| 2,000 RT | 1 | 2,000 RT | 2022 | ||
| Boilers | Water-tube boilers | 40.0 t/h（city gas 13A） | 1 | 40.0 t/h | 1997 |
| Furnace-type fire-tube boilers | 36.0 t/h（city gas 13A） | 1 | 36.0 t/h | 2010 | |
| 36.0 t/h（city gas 13A） | 1 | 36.0 t/h | 2014 | ||
| 36.0 t/h（city gas 13A） | 1 | 36.0 t/h | 2019 | ||
| Cooling towers | Open-diversion forced-draft | 5cells | 17,500CT | 1997 | |
| 3cells | 10,500CT | 2003 | |||
| 4cells | 14,000CT | 2009 | |||
| 3cells | 10,500CT | 2012 | |||
| 5cells | 17,500CT | 2022 | |||
| Step-down transformers | Gas-insulated super-high-voltage transformer | 1 | 20,000kVA | 1997 | |
| Voltage Primary：66ｋV，Secondary：6.6ｋV | 1 | 30,000kVA | 2009 | ||