Innovative CO2 technology combines heating and cooling at Sainsbury’s
The newly equipped Sainsbury supermarket in Crayford, Kent, UK, has introduced a number of firsts, including the addition of a closed loop borehole system integrated with CO2 refrigeration, and the ability to produce both heating and cooling simultaneously from renewable sources. The combination of these two key groundbreaking technologies and an intelligent energy management system have resulted in the elimination of gas as an energy source, leading to a total store energy consumption reduction of at least 30%.
Transcritical CO2 Booster system for highest efficiency
A transcritical CO2 booster is a refrigeration system that covers both medium temperature and low temperature demands of small to large-size supermarkets. This technology combines the advantages of natural refrigerants with that of achieving higher efficiencies than systems using HFC refrigerants. A water-based borehole cooling system further enhances these efficiencies, and greatly assists in optimising CO2 refrigeration system performance.
Geo-exchange technology
Geoscart™ technology, known as geo-exchange, uses a series of closed loop boreholes drilled to 200 metres underground to access the natural geothermal potential within the Earth. The boreholes deliver geothermal temperature-conditioned cooling fluid to the refrigeration packs. This enables the system to capture and store the waste heat, which is later released to provide heating and hot water in the store via heat pumps.
SWEP heat exchangers for efficiency maximisation
SWEP has provided brazed plate heat exchangers (BPHE) for both systems: the supermarket refrigeration pack and heat pumps for heating.
Source: R744.com
