Cooling delivers hot water for food store
The Co-operative’s food store in Dagenham has a VRF air-conditioning system teamed up with a heat-pump boiler to provide all the hot-water needs. Heat rejected by the Mitsubishi City Multi VRF R2 heat-recovery system is used by a PWFY heat-pump boiler. The new equipment replaces an assortment of oil-fuelled heaters and electrical cooling equipment which were inefficient and costly to run — and left some parts of the store cold while others were overheated.
The solution was devised by building and environmental specialists Stewart Anthony. The PWFY heat-pump boiler can achieve a flow temperature of 70°C.
The VRF outdoor units are linked to ceiling cassettes in the store. The 2-pipe system can simultaneously provide heating and cooling — helping to reduce installation time and the costs of materials.
‘We wanted a new system that would reduce the store’s energy use and its CO2 output and provide our customers and staff with a comfortable shopping environment.’ says the Co-operative’s regional energy and environmental manager Nick Cairns. ‘Any work involved also had to be carried out quickly and quietly and create the least possible disruption to our trading.’
The PWFY can often be retro-fitted to existing air-conditioning systems.