--- In [email protected], "Keens, Graham, VF UK -
Technology \(MP\)" <[EMAIL PROTECTED]> wrote:
>
> Baz asked " So can one of you [this means Sean, I expect...] please
> explain how the crew of Emily Jane could 'manually put water into
the
> boiler'? "
>
> As a lock queue sharer, I am unable to answer your question. I was
told
> this snippet when I pointed out that the safety valve atop the
boiler
> was chucking a lot of steam out, they bemoaned the lack of injector
> meant they couldn't cool the boiler whilst waiting for Somerton Deep
> lock. I'm not sure what other method they were using to get water
into
> the boiler.
>
> Come in Sean, where ever you are ;^)
>
> Graham
> www.jannock.org.uk
>
I though i'd join in this merry little disscution!
Our experence aboard emilyanne is that injecting a decent quantity of
water into the boiler can have a noticable affect on steam presure.
- Obvously the best thing to do is not to come into a lock with a
full head of steam and a big fire. But sometimes it happens!
- Blowing off also loses water from the boiler, so injecting some
back in again is usally a good idea anyway!
We find that we can only get the injector(s) to lift really fairly
cold water, lukewarm tops. So your taking energy out of the boiler in
the form of the steam used by the injector, and also dumping a gallon
or so of cool water into it.
- The water does get warmed from the injector (this is how it works,
and why injecting hot water doesnt!) but only from the steam from the
boiler itself! So its still no more total energy. Right?
We then have a three-ram engine driven feedpump, which is the main
source of boiler feed water, pumping from the hotwell* into the
boiler.
- There is then a ball valve in the hotwell, which opens when the
water leval decreases, causeing the pump to shortcycal back into the
hotwell, and thus making the system selfregulating to a degree.
*Emilyanne is condesing, so the used steam from the engine is cooled
by canal water and turned into (warm/hot) water, which is then pumped
into the hotwell before being filtered and returned to the boiler.
Daniel Hutchinson,
SNB EmilyAnne,
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