Skip to main content

Hitachi

Social Innovation

Result : A chiller is delivered that starts more quickly and runs more efficiently Result : A chiller is delivered that starts more quickly and runs more efficiently

  • Urban Development
  • Energy

In July 2013, the innovative turbo chiller began its operations below Shinjuku's skyscrapers. Mr. Iida, Deputy Director of the Shinjuku District Heating and Cooling Center, says he was first surprised by the speed of its start-up.

The steam-powered chillers we used in the past required about an hour and 30 minutes from when they were turned on until they started working. But this electric turbo chiller started in just eight minutes. This is what surprised me most, and I was thoroughly satisfied with their work.

Isamu Iida, Deputy Director, Shinjuku District Heating and Cooling Center

Expectations are also high for more efficient operations using the inverter control, in the hopes of maintaining the efficiency target throughout the year. And Mr. Iida says he hopes to reach even greater heights in future operations.

The inverter control allows it to run more efficiently. In the future we would like to find the optimum mix with conventional steam-driven turbo chillers.

Isamu Iida, Deputy Director, Shinjuku District Heating and Cooling Center

Looking Ahead to the Next 35 Years

The challenge going forward will be long-term maintenance of the chiller's performance. The two supervisors who overcame great hurdles to succeed in this replacement project hope to hand down their experience to the next generation of engineers.

Today there is a proposal for a smart energy network that will efficiently use energy within the city. We hope to further develop the technologies achieved through this system and make contributions to society.

Yasuo Uraki, General Manager, Large Tonnage Chiller Operation Division, Air Conditioning System Group, Hitachi Appliances, Inc.

It would make me very happy if future engineers were inspired by the work we have done and felt the desire to do this kind of work too, as I felt when I first visited the Shinjuku District Heating and Cooling Center.

Yasushi Nakamura, Senior Engineer, Large Tonnage Chiller Operation Division, Air Conditioning System Group, Hitachi Appliances, Inc.

The chiller that was put out of service in this project operated continuously for 35 years without losing its capacity. This is the level of performance and satisfaction, along with the mutual trust built with this customer, that led to the order to Hitachi for the replacement chiller and that guided the whole project to success. Mr. Iida says he will work in close cooperation with Hitachi on maintenance to keep this chiller running for another 35 years.

In this video: Shinjuku District Heating and Cooling Center Deputy Director Isamu Iida talks about cooperation with Hitachi and expectations for 35 years of performance.

The Shinjuku District Heating and Cooling Center

The Energy Advance Co., Ltd. Shinjuku District Heating and Cooling Center has provided comfort to support the functions of the city through its role in supplying air conditioning to the district around the Shinjuku Shintoshin district in Tokyo. The plant was moved to its current location with the relocation of the Tokyo Metropolitan Government buildings in 1991. With refrigeration capacity of 747 GJ/h*, heating capacity of 621 GJ/h, and a total service floor area of 2.2 million m², it is one of the largest heating and cooling centers in Japan.

*
GJ/h: A unit of energy, work, heat, or electricity. 1 J=1 watt-second.

About the Company and Products

The chillers used in the Shinjuku District Heating and Cooling Center were designed and manufactured by Hitachi Appliances, Inc. Hitachi Appliances provides a comprehensive air conditioning business that covers products ranging from room air conditioners and packaged air conditioning systems for stores and offices to chiller units for buildings, hotels and hospitals, spot air conditioners for industrial use, and large tonnage chillers for district heating and cooling systems.

Customer:
Energy Advance Co., Ltd.

Industries:
District Cooling Systems

Region:
Japan

Release Date:
Dec. 2014

Products & Services:
Air Conditioning

Solutions By:
Hitachi Appliances, Inc.