The device steam condenser is a closed vessel into which the steam is exhausted, and condensed after doing work in an engine cylinder or turbine. The main object of steam condenser is to maintain a low pressure (below the atmospheric pressure) so as to obtain the maximum possible energy from steam and thus to secure a high efficiency and to supply pure feed water to the hot well, from where it is … If the condenser is not used then we have to compress this steam up to boiler pressure for which a large size of compressor is required and thus the compressor work will also be more and in practical condition it will be more than turbine work due to irreversible losses and thus there is no work …

Its main function is that of a heat exchanger, in which it condenses a substance (refrigerant) from it's gaseous to liquid state.

How the Condensing Unit Works The condensing unit (sometimes incorrectly referred to as compressor) is usually located outside.