[SEL] Ruston 1ZHR

[john palmer]

Peter,according to publication7750, the temp of the out let water should be no hotter than 140 F.   John

> Date: Tue, 20 Jul 2010 20:58:30 +0100
> From: listerdiesel at gmail.com
> To: sel at lists.stationary-engine.com
> Subject: Re: [SEL] Ruston 1ZHR
> 
> On 20 July 2010 15:15,  <edurand at mchsi.com> wrote:
> > Peter:
> >
> > Methinks youmay have to revisit the cooling system for the Ruston.  If you really load it up, it will surely top the boiling point of the coolant.
> >
> > Maybe you could insert an auto heater into the line and have a thermostat turn on the fan when the temp gets to 90C or so.
> >
> > Am I missing something here?  :-)
> >
> > Take care - Elden
> 
> Hi Elden:
> 
> Probably teaching you how to suck eggs, but here goes:
> 
> It's all to do with the latent heat of evaporation of water, the
> higher the temperature, the more water gets evaporated and takes more
> heat out.
> 
> It takes 1 BTu (British Thermal Unit) to take 1pound of water through
> 1 degree Fahrenheit.
> 
> It takes 970 BTu's to turn that same 1 pound of water into steam.
> 
> So it's a thermal balancing act, increased temperature = increased
> evaporation = more heat out of the water.
> 
> That's the principle that all hopper-cooled and tank-cooled engines work under.
> 
> I'd hoped that if I looked at the installation drawings, it would give
> me a bit of info on the original cooling setup, but it looks as though
> it was a run-to-waste water system from a large header tank.
> 
> I'll not be running it at full power, 2kW will achieve my aim of a
> reasonable loading, 8.2kW maximum in theory.
> 
> Peter
> -- 
> Peter A Forbes
> Email: listerdiesel at gmail.com
> http://www.oldengine.org/members/diesel
> http://stationary-engine.co.uk
> http://www.oldengine.co.uk
> 
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