This is a teaser question that I have to ask the
commercial sailors not to answer.
On our
boats we use watermakers to push at high pressure, sea
water through a number of membranes. It uses a fair amount of
electrical energy to produce potable
water. On
commercial vessels, the wasted heat energy from the engine(s) at 180* F is used to boil sea water and collect the distillate via
condensation, thus producing potable water.
The teaser question is how they manage to boil water at 180*F?