Contact: Nikken Sekkei Ltd 2-18-3 Iidabashi, Chiyoda-ku, Tokyo, JapanTel: +81-3-5226-3030URL: http://www.nikken.co.jp

Effects or Remarks O-34

The Harumi DHC has achieved a significantly reduced carbon dioxide emission per unit of heat, which is about 60 % lower than the average emission of the DHC systems in Japan. Having a primary energy conversion COP of 1.19, this DHC system has the highest efficiency in Japan among the DHC systems not utilizing unused energy (temperature differences of seawater, river water, and sewage water, etc.).

■ Major awards received The 10th Environment and Energy Conservation Building Award – IBEC Chairman's Award: Institute for Building Environment and Energy Conservation (IBEC)The 42th Awards of the Society - Award of Technology: The Society of Heating, Air-Conditioning and Sanitary Engineers of Japan (SHASE)The 5th Electrical Load Leveling Devices and System Award - Agency for Natural Resources and Energy Director-General's Prize: Heat Pump and Thermal Storage Technology Center of Japan (HPCJ)

Installation in Practice or Schedule

Domestic The district heating and cooling system (DHC) in Harumi Island Triton Square(Tokyo, completed in 2001)

CO

2 em

issi

on p

er u

nit o

f hea

t

Prim

ary

ener

gy c

onve

rsio

n C

OP

Comparison of average CO2 emission of DHCs in Japan and that of Harumi (FY2002) Energy consumption [TJ/year] (primary energy conversion)

Harumi DHC Average of DHCs in Japan

About 60% reduced

DHC utilizing unused energy

Harumi DHC primary energy

conversion COP = 1.19

Keywords

Features

Sustainable Urban Design & Management System - District Heating and Cooling System using Large Water Thermal Storage Tanks -

　

system or software Z3/4 natural gas/electricity

Nikken Sekkei Ltd

O-34 Y4 E29 electrical machinery

The Harumi DHC reduces environmental loads and achieves low heat charges.In consideration of load distribution in a district, a plant was installed at a reasonable position, the center of loads.A temperature-stratified water thermal storage tank with Japan's largest capacity was built as the basis for developing a high-efficient and cost-effective district heating and cooling system.

A large heat storage tank of 2000 m2 (ten times as large as a 50 m swimming pool) is utilized to achieve a Top Runner level record for a DHC plant.

Basic or ryConcept Summa

DHC supply area

Cooling tower

Pipelining (to Y building)

DHC electric room

Monitoring room and other rooms

Cold/hot water tank

Cold/hot water tank Hot water

tank

Cold water tank

Cold water tank

DHC machine room

Cool

ing

wate

r brin

e lin

eOffice tower Y Office tower Z

Heating tower

Pipelining (to Z building)

Transportation, etc.Water receiving tankBrine storage tankBrine stock solution tankDouble bottomOffice tower X

Transportation, etc.

Trench

Office tower WLow-rise building

Block plan

124

Source:JASE-W Japanese Smart Energy Products & Technologieshttps://www.jase-w.eccj.or.jp/technologies/index.html

Contact: Nikken Sekkei Ltd 2-18-3 Iidabashi, Chiyoda-ku, Tokyo, JapanTel: +81-3-5226-3030URL: http://www.nikken.co.jp

Effects or Remarks O-34

The Harumi DHC has achieved a significantly reduced carbon dioxide emission per unit of heat, which is about 60 % lower than the average emission of the DHC systems in Japan. Having a primary energy conversion COP of 1.19, this DHC system has the highest efficiency in Japan among the DHC systems not utilizing unused energy (temperature differences of seawater, river water, and sewage water, etc.).

■ Major awards received The 10th Environment and Energy Conservation Building Award – IBEC Chairman's Award: Institute for Building Environment and Energy Conservation (IBEC)The 42th Awards of the Society - Award of Technology: The Society of Heating, Air-Conditioning and Sanitary Engineers of Japan (SHASE)The 5th Electrical Load Leveling Devices and System Award - Agency for Natural Resources and Energy Director-General's Prize: Heat Pump and Thermal Storage Technology Center of Japan (HPCJ)

Installation in Practice or Schedule

Domestic The district heating and cooling system (DHC) in Harumi Island Triton Square(Tokyo, completed in 2001)

CO

2 em

issi

on p

er u

nit o

f hea

t

Prim

ary

ener

gy c

onve

rsio

n C

OP

Comparison of average CO2 emission of DHCs in Japan and that of Harumi (FY2002) Energy consumption [TJ/year] (primary energy conversion)

Harumi DHC Average of DHCs in Japan

About 60% reduced

DHC utilizing unused energy

Harumi DHC primary energy

conversion COP = 1.19

Keywords

Features

Sustainable Urban Design & Management System - District Heating and Cooling System using Large Water Thermal Storage Tanks -

　

system or software Z3/4 natural gas/electricity

Nikken Sekkei Ltd

O-34 Y4 E29 electrical machinery

The Harumi DHC reduces environmental loads and achieves low heat charges.In consideration of load distribution in a district, a plant was installed at a reasonable position, the center of loads.A temperature-stratified water thermal storage tank with Japan's largest capacity was built as the basis for developing a high-efficient and cost-effective district heating and cooling system.

A large heat storage tank of 2000 m2 (ten times as large as a 50 m swimming pool) is utilized to achieve a Top Runner level record for a DHC plant.

Basic or ryConcept Summa

DHC supply area

Cooling tower

Pipelining (to Y building)

DHC electric room

Monitoring room and other rooms

Cold/hot water tank

Cold/hot water tank Hot water

tank

Cold water tank

Cold water tank

DHC machine room

Cool

ing

wate

r brin

e lin

e

Office tower Y Office tower Z

Heating tower

Pipelining (to Z building)

Transportation, etc.Water receiving tankBrine storage tankBrine stock solution tankDouble bottomOffice tower X

Transportation, etc.

Trench

Office tower WLow-rise building

Block plan

125

Source:JASE-W Japanese Smart Energy Products & Technologieshttps://www.jase-w.eccj.or.jp/technologies/index.html