Robert Wiseman Dairies is the largest fresh milk producer in the UK. Recently the company installed an innovative ammonia heat recovery unit. The ammonia heat pump provides 80°C water for the pasteurisation process replacing the need for a gas boiler. This has significantly improved the return on investment for replacing an old HFC system with a central ammonia based refrigeration plant. The installation has resulted in a reduction in gas usage of 52% and a water reduction of 50%. However, t
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