Press Information

MHI and MC Jointly Receive Order for 9 Centrifugal Chillers
For District Cooling System Serving Marina Bay, Singapore
– Total Cooling Capacity of 25,600 Refrigeration Tons –


Tokyo, November 27, 2008 - Mitsubishi Heavy Industries, Ltd. (MHI), jointly with Mitsubishi Corporation (MC), has received an order for nine centrifugal chillers for a large-scale district cooling system to serve Singapore’s New Downtown currently under development at Marina Bay. The nine chillers, with a total cooling capacity of 25,600 refrigeration tons*1 (RT), were ordered by Singapore District Cooling Pte Ltd (SDC), a joint venture between Singapore Power Limited, a local energy utility, and Dalkia, a French energy service company. This is the second centrifugal chiller order placed to MHI by SDC.

The New Downtown at Marina Bay in Singapore's southern sector encompasses an area of approximately 370 hectares adjoining the old downtown. The Marina Bay area is now busy with the construction of a new business and financial district development as well as an integrated resort facility. Previously, in 2002 MHI received an order from SDC for the first district cooling plant incorporating five centrifugal chillers with a total cooling capacity of 10,450 RT. The first plant completed in 2006 has been providing district cooling service to the first-phase commercial development in Marina Bay comprising two skyscrapers of 50 and 29 stories. Of the nine units of 2,844 RT capacity chiller now on order, three units are slated for delivery in spring 2009, which will be installed in the first plant as part of SDC's expansion plan. The remaining six units will be delivered in summer 2009 to be installed in the second district cooling plant which is located in the Singapore's first integrated resort development area, the home to a casino, hotels, shopping and convention facilities.

The centrifugal chillers on order use HFC-134a, a chlorine-free and zero ozone depletion potential (ODP) refrigerant. They achieve the world's highest cooling efficiency: compared to the units delivered to SDC in 2006, the new chillers have boosted energy-saving efficiency by about 5% in COP (coefficient of performance)*2 and 30% in IPLV (integrated part load value) rating*3. The new units also help in lowering the emission of CO2, a greenhouse gas, by 23% compared with the previous model developed about 10 years ago. MHI believes that in addition to the new chiller's technological advantages, environmental responsiveness and operational economy, the strong track record of reliability demonstrated by the first batch of chillers and timeliness of product delivery, both in Japan and Singapore, are the key factors contributed to the second batch of chiller order from SDC.

The district cooling system for Marina Bay, Singapore will be developed in phases to keep pace with the plan to turn Marina Bay area into the new downtown for Singapore. When fully developed, the district cooling system is expected to have an installed capacity of about 256,000 RT.

In April 2008, MHI established centrifugal chiller division at Mitsubishi Heavy Industries Singapore Private, Ltd. (MHISP), targeted at strengthening its marketing and service structure in Singapore and throughout Southeast Asia. The company also intends to continue focusing on attracting orders from SDC in the years ahead.

1)  Refrigeration ton represents the refrigerating capacity for turning 1 ton of 0℃ water
     into 0℃ ice in 24 hours. 1 RT = 3,024 Kcal/hr.

2)  Coefficient of performance (COP) indicates the ratio of a system's useful energy output
     versus the system's energy input. The higher a system's COP, the higher is
     its energy-saving efficiency. In the case of refrigeration systems,
     COP = rated cooling capacity (kW) / electricity consumption (kW).

3)  The integrated part load value (IPLV) rating system was developed by the
     Air-Conditioning and Refrigeration Institute (ARI) of the U.S. IPLV measures the
     efficiency of air-conditioners under a variety of conditions: several partial
     operational load ratios and coolant water temperatures similar to those
     in actual usage, to reflect seasonal changes in operational conditions.
     As with COP, the higher the IPLV rating, the higher is the energy-saving efficiency.


About MHI Group

Mitsubishi Heavy Industries (MHI) Group is one of the world’s leading industrial groups, spanning energy, smart infrastructure, industrial machinery, aerospace and defense. MHI Group combines cutting-edge technology with deep experience to deliver innovative, integrated solutions that help to realize a carbon neutral world, improve the quality of life and ensure a safer world. For more information, please visit or follow our insights and stories on