I know the last thing the boards need, is another steam experiment by me. I just can't resist.
The answer is.......Yes. So, 188" Sq equals the surface area of the bottom of a keg. I started out my day cleaning up the garage a little and found an old project. One that isn't going to get done period. So, I grabbed the piece of SS sheet from it and it just so happened to fit the bottom of the keggle. Sort of. Game On.
I did a down and dirty job just so I could see if it was even going to work. I welded on the piece of sheet metal to the bottom and burned a couple holes for an input and an output. Welded on a couple 1/2" couplings and boom. I have a keggle with a steam fired bottom.
I wont bother with any specifics as I had to find the sweet spot to make it do what I wanted it too. I will say it isn't the most efficient way to boil with steam. My other methods use about half what this one does. Having said that, this still uses less then direct firing.
Here is a couple of pics.
This is the input. See it goes into the skirt.
This is the drain. Center of the bottom.
This just shows the piece welded to the bottom, and the little weep hole that had to be plugged.