Thanks again, Doug.
Stirlings do get back into the running now that I'm not going for
maximum efficiency, but I'm still intrigued by the integration with
forced draft. I'll look at options for hot pump construction. I could
take some heat off first to reduce the problems.
For years, I've also been trying to promote the idea of using windmills
directly as water pumps to re-charge hydro power reservoirs. A Humpfrey
pump could be used the same way, and it seems to be the best scheme to
date for tolerating tar.
You remind me of a friend who was finishing a run of 2 X 4s, and started
to re-set the saws for 2 X 3s just before the last stud was clear. It
wound up shattered inside a compressor on the far wall.
Bob
On 17-01-03 11:36 PM, Doug wrote:
Hi Bob,
I doubt if roots blowers would work with all the heat involved. They
are oil lubricated, but as the carbon dust collects even from dry cold
gas, they eventually seize. Vane pumps are a different matter if you
can build one with high temperature capability. In some respects, this
is how the rotary Wankel engine works if you add a spark ignition.
It's worth telling of how our Roots blower being used to draw gas into
pressurized storage in Canada stalled, then due to no none return
valve, was driven backwards until the pulley came off and went through
the metal siding of the building.
Greg Manning up in Canada, found that orange oil available in many
cleaning products is the best solvent for tar or carbon based
deposits. If you play with gasification, make sure your hand cleaners
are orange oil based, as it's the best you can use.
Have you considered Stirling Engines as an option?
Doug Williams.
On 04/01/17 17:39, Bob Stuart wrote:
Another option has occurred to me for single house size units.
Turbines always lose efficiency as they get smaller, with a higher
surface/volume ratio. Since I'm only looking for pressures in
fractions of atmospheres, vane pumps and/or rootes blowers might be
more suitable. Could regular injections of a solvent or cleaning
solution prevent excess tar build-up?
Bob
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