Case study
International Maritime Organisation
Replacement of the chillers which provide cooling to the offices and conference suite
Key information
Client:
International Maritime Organisation
Supplier:
Star Refrigeration Ltd.
Type of facility:
2 NH3 water chillers
System start-up:
2002
The International Maritime Organisation building in London is HQ to a world-renowned institution and is a major venue for many global conferences. In order to comply with environmental standards, it was necessary to replace the chillers, which provide cooling to the offices and conference suite.
Requirements
The R-11 chillers were to be replaced due to the phase out of CFCs and the new chillers had to comply with the Gov-ernment's policy of avoiding fluorocarbon refrigerants.
Solution
Two water chillers were placed in an acoustic housing on the roof of the offices, close-coupled to two evaporative con-densers.
Technical data
Cooling capacity:
1,400 kW
Refrigerant volume:
280 kg
Main components:
Low pressure receiver, plate heat exchanger, condenser
Special features:
The power consumption of the ammonia chillers is signifi-cantly less than previous systems and they are estimated to be over 30 % more efficient than the previous installation. The chillers operate as a critically charged, flooded system, with a low specific ammonia charge.
