Oxford ice rink benefits from increased energy efficiencies

Oxford’s popular ice rink has benefitted from a major improvement programme that includes a custom-built    natural refrigerant cooling system installed by J & E Hall.  The system delivers increased energy efficiencies, cost savings and addresses environmental concerns.

Towards the end of 2010 the council approved a £700,000 improvement programme for Oxford’s ice rink which included replacing its aged refrigeration system and refurbishing the complex.

By addressing the Council’s environmental considerations combined with the need for the most energy efficient solution, J & E Hall’s South East Division secured the contract to supply a bespoke 360kW Ammonia Chiller featuring two HallScrew single screw compressors.

Ammonia was specified as it offers major advantages over other widely used refrigerants. The design also incorporated variable frequency drives which can reduce the running cost by up to 20% with a pay back on its cost of less than 18 months.

The chiller cools 178 m³/h of calcium chloride indirectly via heat exchangers from an incoming temperature of -8ºC to -10ºC leaving and provides cooling with two compressors operating at 360 kW using R717 refrigerant (Ammonia).  The compressors have been designed for continuous operation for a minimum period of six years or 25,000 running hours (six years) before requiring any inspection.

Bob Timbs, city council executive member responsible for leisure, says “The ice rink is a much loved facility. The new chiller has enabled us to keep the existing rink operating for many more years.”