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Tag: Air Conditioning

Something About Air and Water Cooled Chillers

by on Jul.23, 2010, under Mechanics

The most common compressors used in refrigeration are reciprocating, scroll, screw-driven centrifugal. With various refrigerants chillers used in industry in industrial application, chilled water or other liquid from the chiller is pumped through process. Industrial chillers are used for cooling of products and factory machinery in a wide range of industries.

They are often used in the plastic industry in plastic processing like injection molding, blow molding, extruders, laminations, p.P. Films, rigid p.V.C. Pipe, calendars, chemicals, pharmaceutical process, dyes intermediates, mineral water soda process, paper converting, coating chill rolls, plating and anodizing, lubricants/oil cooling, dairy, bakery, food products, dehumidifier, conditioned air, welding equipment, cement processing, vacuum systems, x-ray diffraction, analytical equipment, compressed air and gas cooling.

Chillers are usually small in size (cooling capacity), usually from 1 tons to 100 tons.

Central chillers generally have capacities ranging from ten tons to hundreds or thousands of tons.

Water chillers can be either water cooled or air-cooled. Water cooled chillers offer efficiencies better than air cooled is due to heat rejection at or near the air’s wet-bulb temperature rather than the higher, dry-bulb temperature but it is used in conjunction with cooling tower.

The heart of the chiller is the refrigeration compressor. This is a pump that uses electrical energy to pump refrigerant around the system. Depending on the application like size or operating temperature, a different compressor pumping technology is used. Smaller chillers use refrigeration compressors like rotary compressors, scroll compressors, and reciprocating compressors. Larger chillers use refrigeration compressor like reciprocating compressors, screw compressors, absorption compressors, and centrifugal compressors.

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