2006-11-29 01:40:50 · 3 answers · asked by danlee 1 in Cars & Transportation ➔ Boats & Boating
A marine FWC (fresh water cooled) genset uses a raw water pump. RWP brings in water (salt or fresh) from beneath the vessel and supplies it to a heat transfer (radiator). Here the raw water circulates around the coils (brass tubes) to cool the seperate engine coolant. Then the hot raw water is discharged OB (overboard).
The marine genset (elec side) produces electricity, usually 110vac and/or 220vac. Most have an internal combustion engine to turn the genset. Just like most home, com'l, or land generators.
2006-11-29 03:00:59 · answer #1 · answered by captbryguy 5 · 0⤊ 0⤋
It has a built in fresh water cooling system just like a car which is called a "closed circuit system". That in turn is cooled by raw water which is an "Open Water System" (either salt or fresh water) from the outside of the boat which circulates around the engine in a different cooling circuit to assist the closed circuit system and then pumps it back overboard. Marine gen-sets have to be cooled in this manner because they are generally in enclosed spaces with little air flow unlike a car.
2006-11-29 10:21:59 · answer #2 · answered by Mike D 3 · 2⤊ 0⤋
A marine fresh water generator, or "Water Maker" Works one of two ways. Either evaporation, or osmosis. With the "Evap", sea water is taken in and heated, creating steam. The steam is condensed, and you get desalinated water. With an osmosis system the water is passed through fine membranes large enough for water molecules, but too small for salt molecules, the desalinated water is then treated with chemicles and/or ultra violet light to make it potable.
2006-11-29 10:55:14 · answer #3 · answered by nytugcapt 3 · 0⤊ 1⤋