Two different authoritative references; 1974 The Pegusuas Unit and Vesa Mikkonen in his book state categorically with the limited heat energy available in the wood gasifier unit its self you will run 40% short of the heat energy needed to reach complete conversion CO2 <=> CO equilibrium. Fancy talk aside they both mean, yes you can make the CO2 but you will be 40% short of the heat energy to convert it ALL to CO motor fuel gas.
Pegasas suggests useing an outside supplementary heat input.
And Drive On Wood or Power On Wood you do have this extra heat energy available . . .
That’d be that IC engine shedding off ~2/3rds it’s energy as NOT to shaft converted but as “waste heats”. Only a waste if you do not use it!
Doesn’t matter where you would put this extra system heat enrgy in:
+++ engine heat energy to just-in-time fuelwood pre-drying/dehumidifying for a 10% INCREASE in mixed woodgas strength along with a 10% DECREASE in fuelwood consumption;
++ engine heat energy into the primary air as in the WK and others;
- engine heat energy into the upper hearth core as in the gen IV GEKs;
You WILL performance gain.
This is stationary systems information that you vehicle guys mostly except for WayneK insist on cold shouldering. “too hard”, "too far away"
One of about 5 reasons I see that he blows away all others in real world usable woodgas engine performances.
“The Pegusuas Unit” retitled as “Drive On wood” is an available download here on the DOW now.
Read. Gasify some wood. Re-read. Gain some more Operators time/experiences. Then re-read again with new eyes. It addresses “the Heat Budget” in wood gasification excellent. Learn. Use. Gain use performance and use flexibility.
“Take care of the Heats, and the chemicals will take care of themselves” s.u.