The principle of fresh water generator

Hot diesel engine jacket water passes over th stack and heats the sea water passing through the tubes. Because fo the reduced pressure in the machine, some of sea water boils as it flows through the tubes. The steam produced rises to the upper part of the evaportaing section and passes through a water separator or demister which prevents water droplets passing through. In the condensing section the steam becomes pure water , which is drawn off by a distillate pump. The remainder of the sea water fed , the brine , is drawn out by a brine pump. An air ejector draws out the air from the evaporator to maintain the vacuum in it .