Dear Bruce

Interesting practical problem!!

The simplest way would be to determine the actual dew point of the engine exhaust. If you knew this, and the actual exhaust temperature, you could then assume the exhaust was the same as air, and use high temperature air tables to reasonably estimate the additional moisture it could hold.

One concept would be to find a glass tube, and flow a portion of the exhaust through it. Shove a thermocouple into the other end of the glass tube, to the point where condensation is first seen on the inside of the tube, and the temperature reading should be close to the exhaust gas dewpoint.

Best wishes,

Kevin

----- Original Message ----- From: "Bruce Jackson" <[email protected]> To: "Discussion of biomass pyrolysis and gasification" <[email protected]>
Sent: Sunday, December 12, 2010 1:37 PM
Subject: Re: [Gasification] engine exhaust relative humidity


Hi,
Where should I start looking to calculate the relative humidity of engine
exhuast, and how much more water it could pick up?
Not sure if the same tables would work for engine exhaust as the ones for
air....
BPJ



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