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Posted By wolfcreek,
Dec 29, 2011 at 4:14 PM
FWIW I'm really enjoying this discussion. Learning a lot. Keep it going.
Maybe I can actually contribute (instead of take) here. The Greek letter lambda as we're discussing it represents a ratio of air to fuel mixture. I'll give you a synopsis as to the automotive world as that's my background, I think you can gain some insight how it may apply to any manageable combustion process.
Lambda is actually a ratio of air to fuel that is considered perfect. 14.7 to 1.0 (stoichiometeric), for gasoline engines.
The development of the oxygen sensor use in engine emmission control, or as Volvo used the Robert Bosch probe, Lambda sensor, in their Volvo Lambda Sond system, reported a real-time oxygen level in combustion exhaust gasses that was responsive enough to feedback into a control unit allowing minute adjustments to maximize performance while keeping in a very narrow exhaust gas mix. Keeping the exhaust gas mix controlled was vital to the chemistry of a new 3-way catalytic converter that managed NOx (nitrious oxides, a pollutant). Prior to the 3-way catalytic converter, we needed an auxiliary air pump (or smog pump) to add air to the 2-way catalytic converter to effect tailpipe emission requirements. If you owned an early 1980â€™s automobile, you likely suffered the low performance it offered because of the limitations of controlling NOx. There was a maze of pump(s), belts, tubes and hoses to support the add-air function. When the Lambda sensor was added to the emissions system, all the add-air junk went away. Compression ratios increased, bringing performance and efficiency. The overall process of engine management has added decades to the internal combustion engineâ€™s viability in providing suitable power and economy. The introduction of the lambda probe was very significant and has been remarkably successful.
What's next , a particulate filter and urine canister. Just kidding Henfruit. Good info
I know this is an older thread, but I was on the New Horizon site browsing, and on the EKO page there is a printable UL sheet for the boilers.