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<DIV><FONT face=Arial size=2><STRONG>Hi Tom R. and Gasification
Colleagues,</STRONG></FONT></DIV>
<DIV><FONT face=Arial size=2><STRONG></STRONG></FONT> </DIV>
<DIV><FONT face=Arial size=2><STRONG>When Vicrant posted his original question
to this forum regarding Methane Numbers, I did wonder why he would have a need
to ask, especially as Cummins already use their engines for producer gas,
along with Methane numbers (but probably for natural gas).
</STRONG></FONT></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial size=2>
<DIV><FONT face=Arial size=2><STRONG>There once was a time, when you had to ask
questions of those who engaged is certain fields for their technical assistance,
but today thanks to Wikipedia, terminology such as cetane, octane, and methane,
plus all the associated related details, are there for dopes like me
to access quickly. It certainly beats opening the office door and hunt through
the dust covered files! </STRONG></FONT></DIV></FONT></STRONG></DIV>
<DIV><FONT face=Arial size=2><STRONG></STRONG></FONT> </DIV>
<DIV><FONT face=Arial size=2><A
href="http://www.cumminspower.com/www/Commercial/Set_ng50/C1750_N5C_ng50.html"><STRONG>http://www.cumminspower.com/www/Commercial/Set_ng50/C1750_N5C_ng50.html</STRONG></A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2><STRONG>These modern engines are like Tom
suggests:</STRONG></FONT></DIV>
<DIV><FONT face=Arial size=2> </DIV>
<DIV
style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469)">>Modern
engines use knock sensors/timing to increase combustion efficiency by operating
just below the knock limit. I presume that this would greatly increase
power >and efficiency of PG, but I don't know if they could increase CR
enough to accommodate PG.</DIV>
<DIV
style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469)"> </DIV>
<DIV
style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469)"><STRONG>You
can dig out all the facts for yourself, but the success of extracting the
maximum energy of the producer gas is not only the engineering nuts and bolts,
cams, turbo, intercoolers, compression ratios, rpm, etc, but to the software
developed to manage producer gas. These are the new engines we have been waiting
for, at least for clean producer gas, but even using that term can open up a can
of worms for the engine warranties.</STRONG></DIV>
<DIV
style="-webkit-tap-highlight-color: rgba(26, 26, 26, 0.296875); -webkit-composition-fill-color: rgba(175, 192, 227, 0.230469); -webkit-composition-frame-color: rgba(77, 128, 180, 0.230469)"><BR></DIV></FONT>
<DIV><STRONG><FONT face=Arial size=2>What we don't see spelt out about producer
gas, is that it's variations away from what we might call "normal analysis" is
infinite, and how that affects the combustion chemistry, engine operation
and/or it's componentry life. That we might choose to fiddle with older
basic slow speed engines to make them perform better for basic
electrical and mechanical power, these modern high speed engines place real
challenge on the gas making consistency. </FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial size=2>Gasification remains for me one of the
most challenging technologies that have crossed my path, and if I think for one
minute I have it by the tail, the other end will bite me given the right
conditions. </FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial size=2>Onwards as Tom R.
suggests.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial size=2>Doug Williams,</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>Fluidyne...</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2></FONT></STRONG> </DIV>
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