Trane TRG-TRC004-EN manual 2SHQ&RPSUHVVRU

period one

Compressor Types

notes

In the air-conditioning industry, centrifugal compressors are most commonly used in prefabricated water chillers ranging from 100 to 3,000 tons [350 to 10,500 kW]. They are also used in field-assembled water chillers up to 8,500 tons [30,000 kW].

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In addition to the different methods of compression, compressors can be classified as open, hermetic, and semihermetic. A reciprocating compressor will be used to explain these terms.

An open compressor is driven by an external power source, such as an electric motor, an engine, or a turbine. The motor is coupled to the compressor crankshaft by a flexible coupling. Since the shaft protrudes through the compressor housing, a seal is used to prevent refrigerant from leaking out of the compressor housing.

This motor is cooled by air that is drawn in from the surrounding space. The heat removed from the motor must still be rejected from the space, either by mechanical ventilation or, if the space is conditioned, by the building’s cooling system.

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