Outline of the JR Central Nagoya Station Area District Heating and Cooling

1 Company Profile

• Company name : Nagoya Netsukyokyu CO.,LTD

• Establishment : Oct. 7th 1994

• Capital fund : 1.6 billion JPY

• Major Stockholders : Central Japan Railway Company 51.0% CHUBU Electric Power Co., Inc 24.5% TOHO GAS CO., LTD 24.5%

• Business outline : Supplying Chilled water, Hot water, Steam etc. 2 Introduction of the Plant • This DHC adapts Eco friendly heat supply system which saves energy by combination of “Ice storage system(electricity)” and waste heat from the “Cogeneration system(Natural gas)”. • Energy management is adopted to enhance energy efficiency by continuous analysis of operational data.

Hot water System outline heat exchanger

Steam Steam boiler header Steam Steam Owned by JR Steam Natural Gas central building Waste heat boiler Hot water Gas turbine generator Electricity to the building Cold water Electricity Brine centrifugal Steam absorption chiller chiller 3 Ice storage Cold water heat tank exchanger Heat recovery heat pump Load curve of the DHC • As cooling demand in the summer time from 11:00 to 18:00 is plateau, by discharging the cold heat stored at the nighttime, the system could reduce the operation hours of the chillers and contribute to energy saving. • The electricity demand curve (green line) has been resulted to be flat. Its value is around 3 to 4 MW contributing to load leveling and reduction of operational cost.

Cooling Dairy Cooling and Electricity demand curve Electricity Demand (GJ) (Ave. Summer time pattern) Consumption (MW)

Cooling supply Heat release

Electricity demand

Cooling production Heat storage 4 Peak shaving by Ice storage system • By producing ice at nighttime utilizing low cost nighttime electricity and using them to produce cold water in the daytime, thisIceStorageSystemcontributetocostreductionandload leveling. • The volume of Encapsulated Ice TES tank is 1,226m3 with 49 MWh (14,000RTh) which is as huge as 50m Olympic swimming pool. System outline of the ice storage system

Circulation of the brine Utilization of nighttime electric Cold water power Ice storage tank system Brine Capsule ball Customer centrifugal 2.2million Cold water chiller heat exchanger 5 Ice storage tank room

(※)Capsule ball was adapted in order to increase contact area with the brine System flow of the heat production

Cooling Tower

Cold water Brine heat centrifugal Exhaust heat recovery exchanger chiller heat pump Supply Cold water Return Cold water Supply hot water Return hot water

Steam Absorption Chiller

Supply Steam Condensed water

Co generation Ice storage waste heat boiler tank 6 (※)In this plant we have adapted the electric and gas combined system. And load leveling has been achieved by ice storage system utilizing nighttime electric power and use of steam absorption chiller. Also waste heat from the cogeneration system (Natural gas) which is installed inside the JR central tower building is used. Plant location diagram

Cooling tower Hotel tower Office tower

Parking building

Nagoya Marriott Office Associa Hotel B2 B3

Ice storage tank Sky street Parking building Central monitoring room Cogeneration Boiler room Tower plaza room Chiller room JR Nagoya Takashimaya

7 Parking Subway DHC plant Plant data • Equipment list and it’s capacity

Name Specification Number Cooling Steam absorption chiller Double effect steam absorption chiller 8,750 kW(2,500RT) 3 units (Capacity Double effect steam absorption chiller 7,000kW (2,000RT) 2 units 48,900kW) Brine centrifugal chiller Electric centrifugal chiller 3,500 kW (1,000RT) 2 units Exhaust heat recovery heat pump Cooling 1,400kW(400RT) Heating 1,800kW 1 units

Ice storage tank Capacity 1,226m3 : 49 MWh 1 set Cold water heat exchanger Brine‐Water heat exchanger 7,000kW(2,000RT) 2 units (Heat release) Cooling tower 990m3/(h・unit) (9,200kW/unit) 10 units

Heating Steam boiler Flue and smoke tube boiler (Natural gas) low NOx 15.0t/h(9,500kW) 3units (Capacity 40,600kW) Flue and smoke tube boiler (Natural gas) low NOx 12.0t/h(7,500kW) 1units Flue and smoke tube boiler (Natural gas) low NOx 4.8t/h(3,000kW) 1units Hot water heat exchanger Steam‐Water heat exchanger 2,300kW 2 units Cogeneration waste heat boiler Water‐tube Boiler 4.45t/h (JR central building’s equipment) 3units • Supply area of the plant Project scale Supply area 121,000m2 , Supply total floor area 419,015m2 8 District piping system 4 piping system (some part 6 way) : Cold water + Steam + (Hot water) Supply customer JR Central towers , Nagoya station (Subway), Nagoya station (JR Central) Way of usage Office, Commercial building, Hotel, Train Station