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Performance Analysis of

Marina Bay District Cooling Plant in Singapore

Noriyasu Maehara

District Cooling Plant became indispensable for new developing area in Singapore. Mitsubishi Heavy Industries, Ltd has been working to improve performance of Marina Bay District Cooling Plant (hereinafter DCS Plant) with Singapore District Cooling Plant by applying specially designed chiller and DCS plant process design. Marina Bay DCS Plants supply chilled water to Marina Bay Sands Integrated Resort (MBSIR), Business Financial Center and office building in Marina Bay Area. In addition, it also supplies hot water to MBSIR. The system COP including Electrical Centrifugal Chiller, Pumps and Cooling towers is 5.3 for No.2 Plant and 5.1 for No.1 Plant. That COP is at a higher level compared with that of DHC plants in Japan.

  1. Introduction: The District Cooling Plant was introduced in 1997 in Singapore (Changi Business Park) and many district cooling plants (such as Biopolis, Fusionopolis) were constructed in Singapore. The DCS plant technologies are acknowledged as an innovative urban utility service involving the centralized production of chilled water piped to commercial buildings for air-conditioning. It supplies a 24-hour reliable flow of chilled water at a stable temperature to meet the air-conditioning needs of modern commercial buildings. To confirm the effectiveness of DCS plant in the tropical countries, the author carried out a performance analysis of Marina Bay DCS Plant with the cooperation of Singapore District Cooling Pte Ltd (hereinafter called SDC).
  2. General Information of DCS Plant in Marina Bay: The DCS Plant in Marina Bay area consists of 2 DCS Plants. The chilled water supply area is shown in Fig.1 and Fig.2. In the final development, Marina Bay Area is assessed to require 5 DCS Plants interconnected by the network piping. The Cooling load of Marina Bay DCS Plant is shown inFig.3 and the maximum diversified load is 73MW (20,800RT). The developments in Marina Bay area consists of commercial buildings and an integrated resort comprising hotels, exhibition spaces and a casino. No.1 Plant is mainly supplying chilled water to the commercial buildings while No.2 Plant is supplying to the integrated resort. A “snap shot” of the cooling load profile can be summarized as follows.
  3. Operation of DCS Plant: To achieve highly efficient DCS Plant performance, SDCis operating No.2 Plant Chiller in 100% load and No.1 plant chiller is operated in modulating condition.