![]() ![]() ![]() Some processes (for example, distillation columns) perform less efficiently when supplied with superheated steam.The presence of high heat transfer coefficients associated with saturated steam leads to smaller and cheaper heat exchangers than those which utilise superheated steam. This greatly assists accurate sizing and control of heat transfer equipment. Once the superheated steam is cooled to saturation temperature, the heat transfer coefficient increases dramatically, and the temperature at which the steam condenses back into water is constant. This makes accurate sizing and control of heat transfer equipment difficult, and will also result in a larger and more expensive heat exchanger. ![]() The coefficient of heat transfer when using superheated steam as the heating medium is variable, low and difficult to quantify accurately. ![]()
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