CH>I believe this 93% figure (natural gas) includes all the heat
CH>reclaimation mantioned. I would question the 99% figure, as
CH>friction and pumping losses are not as easy to reclaim.
Ah, friction becomes heat. But heat contribution from friction is not
nearly as much the heat going out of the exhaust. Kilowatts can be
recovered there. One must be mindfull of the hazards, however.
CH>One thing under consideration is the use of a catalytic convertor to
CH>wring the last bit of fuel energy out and convert it to heat.  At that
CH>point, the noxious part of the exhaust would be safer to manipulate as
CH>well...
Agreed.
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