Equipment Capacity

By installing high-capacity, high-efficiency devices such as the large-scale latent-heat-storage system, high-efficiency chiller (5,400 RT inverter centrifugal chiller) and conduit network/centralized monitoring system, MM21 DHC advances environmental support for Minato Mirai 21 district’s drive for further development.

Equipment capacity (as of June 2024)

Center Plant

Name of equipment Overview of specifications Number of units Capacity
Chiller Variable speed drive chiller 5,400 RT 2 10,800 RT
Low-temperature electric centrifugal chiller
(1,720 RT during heat storage)
2,080 RT 1 2,080 RT
Heat-storage electric centrifugal chiller
(2,000R RT during heat storage)
2,650 RT 1 2,650 RT
Double-utility absorption chiller 3,000 RT 4 12,000 RT
Ice storage tank 15,000 RT × 2
(During heat storage: 3,000 RT × 10 hours)
(During heat dissipation: 5,000 RT × 6 hours)
2 30,000 RTh
Cooling tower Open forced-draft type 12 cells 39,481 CT
Boiler Flue and smoke tube boiler 9.6t/h
(city gas 13A)
1 9.6t/h
15.0t/h
(city gas 13A)
1 15.0t/h
24.0t/h
(city gas 13A)
1 24.0t/h
36.0t/h
(city gas 13A)
1 36.0t/h
Water tube boiler 40.0t/h
(city gas 13A)
2 40.0t/h
Receiving transformer Gas-insulated extra-high-voltage transformer 20,000kVA 2 40,000kVA
Cogeneration system Gas-engine
generator
2,000kW 1 2,000kW
Exhaust gas boiler 0.929t/h 1 0.929t/h
Single-utility absorption chiller 68.7RT 1 68.7RT

No. 2 Plant

Name of equipment Overview of specifications Number of units Capacity
Chiller Variable speed drive chiller 5,400RT 2 10,800RT
Electric centrifugal chiller 4,000RT 1 4,000RT
4,400RT 1 4,400RT
5,000RT 1 5,000RT
5,400RT 2 10,800RT
Single-utility absorption chiller 3,000RT 5 15,000RT
2,000RT 1 2,000RT
Cooling tower Open forced-draft type 20 cells 70,000CT
Boiler Flue and smoke tube boiler 36.0t/h
(city gas 13A)
2 108.0t/h
Water tube boiler 40.0t/h
(city gas 13A)
1 40.0t/h
Receiving transformer Gas-insulated extra-high-voltage transformer 20,000kVA 1 20,000kVA
30,000kVA 1 30,000kVA

Total plant capacity

Cooling capacity 79,598RT
Heating capacity 313.5t/h

1 RT is sufficient to run one home-use air conditioner to cool a 12-mat room (about 40 sqm), while 1 t/h of steam is sufficient to run 150 home-use air conditioners to heat one 12-mat room each.

Main equipment

Variable speed drive chiller
Variable speed drive chiller
Low-temperature electric centrifugal chiller
Low-temperature electric centrifugal chiller
Absorption chiller
Absorption chiller
Electric centrifugal chiller
Electric centrifugal chiller
Water tube boiler
Water tube boiler
Flue and smoke tube boiler
Flue and smoke tube boiler
Ice thermal storage
Ice thermal storage
Cogeneration gas-engine generator
Cogeneration gas-engine generator
Single-utility absorption chiller
Single-utility absorption chiller
Exhaust gas boiler
Exhaust gas boiler

Fuel and heat transfer medium

Fuel

Electricity and city gas; kerosene for emergency use

Heat transfer medium

Cooling: Cooling water (outgoing) 6°C/ (return) 13°C

Heating:

Steam (outgoing) 170°C 0.78 MPa/ (return) 60°C (water of condensation)