Re: Doble evaporation rate
Posted by:
R Ulsky (IP Logged)
Date: May 28, 2005 02:35PM
<HTML>George,
My thought was that if one was to run a boiler at very low efficiency, then one should be able to get way more specific output from it. I am building a go-kart steam-thingie for use at the Berrien Springs meet and therefore want a small, very high output boiler and am not worried about fuel usage. Here is what I have set up:
One pancake constructed of 30' of 3/16" cu tubing. It is 10" in diameter, with 1/32" spacing between adjacent tubes and has 1.5 sq-ft of heating surface. This gives me a 4" equivalent diameter flue space which seemed to me to be enough. I am firing it with a "turkey deep-fryer" type propane burner and feeding it maybe 200 KB/hr. The gas temp just below the pancake is 1800 F and it is 1000 F above it. I am feeding it with a constant flow pump (by restricting the pump input) on the engine and have a thermocouple that turns the fire off if the temp gets above 800 F. I only get 30 lbs/hr of 600 F steam out of the thing and I thought I should be getting at least 2-3 times this much.
Can you see where I am going wrong? Obviously, some huge mis-thinking as I am so far off.
Thanks, Roger</HTML>