F - Mech Eng,Light,Heat,Weapons – 25 – D
Patent
F - Mech Eng,Light,Heat,Weapons
25
D
62/97
F25D 17/02 (2006.01) F01P 3/20 (2006.01) F01P 7/16 (2006.01) F01P 5/10 (2006.01) F01P 5/12 (2006.01)
Patent
CA 1223130
ABSTRACT OF THE DISCLOSURE On board ships there are cooling systems of the type comprising a heat exchanger operating as a central cooler, through which sea water is pumped by means of a number of different pumps. Fresh water intended for cooling of the main engine of the ship, and other devices of various kinds on board the ship, is pumped through the heat exchanger and then cooled by the sea water. A by-pass conduit extends between the heat exchanger inlet conduit and outlet conduit for fresh water, a three-way valve being arranged to distribute the fresh water flow through the heat exchanger and the by-pass conduit, respectively, depending on the momentary cooling demand of the main engine of the ship and/or said devices. Thereby a predetermined temperature may be maintained in the fresh water circuit. The present invention resides in sensing of the flow through the heat exchanger, or the by-pass conduit, and in response thereto increasing or decreasing stepwise the pump capacity for pumping of sea water through the heat exchanger.
451773
Alfa-Laval Marine And Power Engineering Ab
Borden Ladner Gervais Llp
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