Page 183 - Introduction to Marine Engineering

Refrigeration, air conditioning and ventilation 169

Sea water
inlet
Section through dished end cover fitted to
condensers for use in a marine application
Figure 9.4 Condenser

Where condensers are of 3 m and over in length between tube plates it
is quite usual to have a double refrigerant liquid outlet so that the
refrigerant drains away easily when the vessel is pitching or rolling.

Evaporators
Evaporators fall into two categories: refrigerant to air and refrigerant to
secondary refrigerant types.
The most simple of the refrigerant to air type is in the form of a bank
of tubes with an extended surface of gills or fins. In these the refrigerant
is expanded in the tubes while the air is passed over the fins by
circulating fans. This type of unit will be found in the domestic cold