Principle of operation A condenser is designed to transfer heat from a working fluid (e.g. water in a steam power plant) to a secondary fluid or the surrounding air. The condenser relies on the efficient heat transfer that occurs during phase changes, in this case during the condensation of a vapor into a liquid. What is condenser ? Condenser is a heat exchanging apparatus used to condense substance in a gaseous state to its liquid state by cooling. The heat (latent heat) from vapour/ gaseous substance is removed first by the walls of the condenser tube. then from tube to surrounding environment/ cooling medium. The common cooling medium is air or water or a combination of them. The size of condenser unit may vary from small handheld to the large industrial scale unit. The selection of condenser ...