HEAT EXCHANGER APPLICATIONSDOE-HDBK-1018/1-93Heat ExchangersSummaryThe important information from this chapter is summarized below.Heat Exchanger Applications SummaryHeat exchangers are often used in the following applications.PreheaterRadiatorAir conditioning evaporator and condenserSteam condenserThe purpose of a condenser is to remove the latent heat of vaporization, condensingthe vapor into a liquid.Heat exchangers condense the steam vapor into a liquid for return to the boiler.The cycle's efficiency is increased by ensuring the maximum DT between the sourceand the heat sink.The hotwell is the area at the bottom of the condenser where the condensed steamis collected to be pumped back into the system feedwater.Condensate depression is the amount the condensate in a condenser is cooled belowsaturation (degrees subcooled).Condensers operate at a vacuum to ensure the temperature (and thus the pressure)of the steam is as low as possible. This maximizes the DT and DP between thesource and the heat sink, ensuring the highest cycle efficiency possible.ME-02Rev. 0Page 18
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