John Lewis is never knowingly under efficient
The installation of three Indigochillers from Star Refrigeration has increased cooling capacity for the John Lewis store on London’s Oxford Street without increasing electrical demand.
The installation of a high-efficiency cooling system to serve the John Lewis store on London’s Oxford Street has provided more cooling capacity with no increase in electrical demand. The installation of the Star Refrigeration Indigochiller system is part of an on-going refurbishment of this store, for which Star has installed three air-cooled Indigochillers on the sixth-floor roof, each with a cooling capacity of 1000 kW. Features of these chillers include environmentally conscious design, low starting current, quiet operation and minimal maintenance. Stuart Watson, development engineer with John Lewis Partnership, says, ‘Star’s new roof-mounted Indigochillers are more efficient and will allow us to increase cooling capacity with no increase in electrical demand. They form part of a heating and cooling efficiency drive that will allow John Lewis to meet energy-reduction targets and reduce its carbon footprint.’ This refurbishment project includes the installation of more efficient boilers, cabling and an electricity substation. The Indigochiller was developed in direct response to proposed F-gas regulations and is designed to eliminate refrigerant leakage. Star’s research shows that these chillers use only 60% of the energy required by a standard chiller operating on typical load and ambient profiles. The compressor operates on electro-magnetic bearings and uses R134a. To minimise the risk of refrigerant leakage, these chillers have a welded plate and shell heat exchanger, sealed expansion valve and welded steel pipework. The requirements for leak detection have been reduced to a few simple checks.
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