The same reason your car runs at or above boiling in a pressurised system. Less heat (energy) goes out with the cooling water, and instead goes out the output shaft as torque. There's also some thermodynamic stuff going on in the combustion chambers, but as I get older, my brain fills up quicker and the details elude me!
sam :-)
What is the process which causes higher temps to be more effiecient?
Better combustion? Thinner oil?
Josh
On May 22, 2014 6:57 PM, "via CnC-List" < [email protected]> wrote:
I think you guys are all missing the point.
Raw water cooled engines run cool in an attempt to limit the crap (salts etc.) coming out of solution and clogging up your cooling chambers in the block.
They sacrifice efficiency to extend the life of your block.
Fresh water cooled engines don't have crap in the cooling water so are able to run at designed (efficient) temps.
sam :-) C&C 26 Liquorice
Ghost Lake Alberta
From: Josh Muckley via CnC-List Sent: Thursday, May 22, 2014 2:10 PM To: C&C List Reply To: Josh Muckley Subject: Re: Stus-List Yanmar 3QM30 thermostat for converted system
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Paul, my counter point is that the engine, as Bill Bina put it, was designed to run a certain temp. Presumably that of the existing thermostat. It sounds like the thermostat is close to 150. If you heat the water more than 120-130 there is safety concern regarding scalding.
Changed the stat and you also have to change the high temp switch.
Just my thoughts,
Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Solomons, MD
On May 22, 2014 1:53 PM, "PME via CnC-List" < [email protected]> wrote:
Hi Josh,
Changing the thermostat and allowing the engine to run hotter improving both the efficiency in making hot potable water and fuel efficiency.
-
Paul E.
1981 C&C Landfall 38
S/V Johanna Rose
Carrabelle, FL
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