High-performance chillers

An average COP of 5.7 is claimed for a range of water-cooled liquid chillers from Delrac. There are 18 models in the EWH range of single- and twin-circuit chillers. They are designed for use with R134a and offer cooling capacities from 105 to 1204 kW. The high performance is attributable to a dedicated heat-exchanger design and specially refined screw compressor. These chillers use counter-current, dry-expansion shell-and-tube evaporators. The evaporators also allow the chillers to be smaller, and they use less refrigerant than other designs. Options include electronic expansion valve, modulating capacity steps, safety water flow switch, liquid injection, rubber type vibration damper, spring vibration damper, remote micro-processor, compressor suction shut-off valve, RS485 serial interface, anti-freeze electric heater, compressor overload relays and compressor oil-level switch. sales@delrac-london.co.uk