[SEL] Ruston 1ZHR

[Elden]

Peter:

I wasn't aware that boiling was allowed!  Mark me as wrong!

Take care - Elden
http://www.oldengine.org/members/durand

> -----Original Message-----
> From: sel-bounces at lists.stationary-engine.com
> [mailto:sel-bounces at lists.stationary-engine.com]On Behalf Of
> Listerdiesel
> Sent: Tuesday, July 20, 2010 3:59 PM
> To: The SEL email discussion list
> 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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