RETAIL DISPLAY
Capitalising on heat recovery
S
upermarkets are energy demanding buildings, consuming 3-4% of the total annual electricity in the UK, writes
Marcus Boskey, group marketing manager at Hydratech. The characteristically large spaces navigate significant cooling and heating demands to ensure the correct balance between food freshness and customer comfort. Nearly half of the total electricity in supermarkets is consumed by the refrigerators. Cooling the display cabinets generates a significant amount of heat which is released into the atmosphere – while gas fired boilers are employed to provide space heating for the building.
24 February 2021
With recent research suggesting that using heat recovered from refrigerators could cover 40% of space heating for supermarkets in parts of the UK, many major supermarkets and food manufacturers have adopted heat recovery to achieve their efficiency and sustainability objectives. From Sainsbury’s closed loop borehole geo-
exchange system to Lidl’s carbon neutral Co2 stores - achieving energy savings of nearly
40% compared to previous, supermarkets represent a key opportunity for energy savings. Supermarket supply chains are also
benefitting from the advances in heat recovery. Gressingham Foods’ new distribution centre at
Norfolk was designed by JDI Cooling. The energy-efficient, low-charge refrigeration system uses R449A HFC as the primary refrigerant and Coolflow Glycol as the secondary refrigerant to service a chill store area operating at 2°C and a cold store at -22°C, year-round. The installation transfers waste heat with Coolflow Glycol from the central refrigeration plant to an underfloor system beneath the chill and cold stores. Heat recovery is also utilised to provide the defrost. Coolflow Glycols are used by many leading supermarkets including, Lidl, Waitrose and Aldi.
www.hydratech.co.uk
www.acr-news.com
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