[Stoves] the 150 gasifier in operation in Vietnam

[Richard Stanley]

Interesting notes about a very nice stove; Whn we get to blue flames and that kind of power output with the spark of a lighter, we are home !  

outdoor propane radient heaters use same gas screen. Think it is converting convective energy to radiant energy frankly as the heat travels nicely downward  several feet to the seated customer with great effect in 50 degree nights  (radient travels in all directions, while  convective emmanates "heat" mostly in the upward direction). 
Without said screen wrapped cylindrically around the burner (up under this ~7 ft tall umbrella  shaped device, the exposed blue jet flames generate almost no heat whatsoever in the downward direction, going instead,  mainly up.  

Of course, the direction of travel is not the issue with Paul's incredible stove but the fact that the screen appears as near infrared has me wondering.

There was a brilliant guy in Washington state several years back who invented the Pyromid stove, a wide collapsible inverted albeit very shallow pyramid shaped braii which worked with only a small handful of charcoal at its center base. The shiny metal sides of the inverted pryamid base were definately not designed for thermal insolation at all; It was however very reflective  and seemed to accomplish a very efficient radiation of the radient energy of the burning charcoal up onto the braii grill. The Pyromid stove  has been taken over by Ecoque company now. 
While you note, Paul that the domed screen prevents fine particulates I wonder if it is not doing something much more than that by way of heat transfer as well? 
Richard Stanley


On Mar 3, 2012, at 10:14 AM, Andrew C. Parker wrote:

Paul O.,


Your wire mesh dome is brilliant, good old fashioned trial and error work.

Did you try the radiant mesh on your propane burner?

A few years ago I ran across a design for a very low pressure gas radiant heater, <http://cerem-infraconic.com/default-eng.php>, and wondered if something like it could be adapted for a gasifier or rocket stove.

These are the US patent numbers:

5060629
6461150 B1
6612834 B2

Some additional patents for low pressure radiant heaters, referenced by or making reference to the above:

4452225
7631640

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