The most troublesome part in the development of a compressor technology depends strongly on improvement of its performance.
By the low pressure in the evaporator (+/-93 % vacuum) the sea water will boil at +/-40 0 C. On motor vessels this is heat from the jacket cooling water (80 to 90 0 C). On modern vessels evaporators use the waste heat as heating medium. In most cases chloride tablets are added in the drinking water tanks to kill bacteria which can be present in the small water droplets going along with the vapour.
batteries To use distillate water as drinking water air must be blown trough it, which takes place in the fresh water hydrofoor and minerals must be added to give taste to the water. The salt in the seawater does not evaporate and when no small droplets of water are going along with the vapour, the condensate will be pure distillate water. One of the options is to evaporate seawater and afterwards condense the vapour. In most instances it is more economical not to load this water from the shore but to produce it from seawater. On all vessels there is a need for drinking water and on many vessels there is also a need for distillate water.
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