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<p><font face="DejaVu Serif">Thanks again, Doug.</font></p>
<p><font face="DejaVu Serif">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. </font></p>
<p><font face="DejaVu Serif">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.<br>
</font></p>
<p><font face="DejaVu Serif">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. </font><br>
</p>
Bob<br>
<br>
<div class="moz-cite-prefix">On 17-01-03 11:36 PM, Doug wrote:<br>
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<p>Hi Bob,</p>
<p>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. <br>
</p>
<p>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.</p>
<p>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.</p>
<p>Have you considered Stirling Engines as an option?<br>
</p>
<p>Doug Williams.<br>
</p>
<br>
<div class="moz-cite-prefix">On 04/01/17 17:39, Bob Stuart wrote:<br>
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<p><font face="DejaVu Serif">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?</font></p>
<p><font face="DejaVu Serif">Bob</font><br>
</p>
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