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38 TRG-TRC004-EN
notes
We will now review the main concepts that were covered in this clinic on
refrigeration compressors.
Period One introduced the four types of compressors commonly used in air-
conditioning applications: reciprocating, scroll, helical-rotary (or screw), and
centrifugal.
The first three types are called positive-displacement compressors. They work
on the principle of trapping the refrigerant vapor and compressing it by
gradually shrinking the volume of the refrigerant. Centrifugal compressors use
the principle of dynamic compression, which involves converting energy from
one form to another, to increase the pressure and temperature of the
refrigerant.
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Figure 51
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Figure 52
period four
Review