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period two
Compressor Capacity Control
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Figure 27
The capacity of a compressor is defined by the volume of evaporated refrigerant that can be compressed within a given time period. The compressor needs a method of capacity control in order to match the
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Figure 28
Capacity control is commonly accomplished by unloading the compressor. The method used for unloading generally depends on the type of compressor.
Many reciprocating compressors use cylinder unloaders. Scroll compressors generally cycle on and off.
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