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| MED (Multi Effect Distillation) |
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| Some of the feedwater is flash evaporated, but most of the seawater
is dispersed over an evaporator tube bundle and boiled. Steam then
condenses to produce fresh water, and this process is continuously
repeated. Since the evaporation takes place in a vacuum, the sprayed
seawater is able to reach boiling point even at low temperatures.
Since MED uses a progression of stages with ever-dwindling temperatures
(at 60~70C), it¡¯s comparatively smaller than MSF in terms of output,
but boasts higher heat efficiency and more economical operation. |
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