Figure 6-19.A cutaway view of a hermetic compressor and
condense the refrigerant vapor to a liquid. The liquid
refrigerant then falls by gravity to a receiver (usually
located below the condenser), where it is stored, and
available for future use in the system.
There are three basic types of condensers
air-cooled, water-cooled, and evaporative. The first
two are the most common, but the evaporative types
are used where low-quality water and its disposal make
the use of circulating water-cooled types impractical.
struction of air-cooled condensers makes use of
several layers of small tubing formed into flat cells.
The external surface of this tubing is provided with fins
to ease the transfer of heat from the condensing
refrigerant inside the tubes to the air circulated through
the condenser core around the external surface of the
tubes (fig. 6-20). Condensation takes place as the
refrigerant flows through the tubing, and the liquid
refrigerant is discharged from the lower ends of the
tubing coils to a liquid receiver on the condensing unit
W A T E R - C O O L E D C O N D E N S E R S .
Water-cooled condensers are of the multipass shell and
tube type, with circulating water flowing through the
tubes. The refrigerant vapor is admitted to the shell
Figure 6-20.Air-cooled condenser mounted on a compressor unit.