Interesting control (Dan H.)

DanHolohan

I'll be talking about at next week's Night Schools:

<a href="http://www.heatinghelp.com/shopcart/product.cfm?category=17-182"target="_blank">Somerville, MA</a>

<a href="http://www.heatinghelp.com/shopcart/product.cfm?category=17-183"target=_blank">Warwick, RI</a>

We've got a few spots left in each.

DanHolohan

Figure it out?

Hmm?

Steve_35

I can't quite see what it is.

Is it a wood or coal fire in the middle?

Looks like there's a sealed air column with water or some other liquid. Does air come in c and in under the fire at E?

If so, and that's a big if, then as the fire gets hotter and the air in the column expands it pushed down on the liquid which then rises and closes off the air flow to the fire. So it's some sort of high limit.

brucewo1b

Pitman thats what I was thinking

Mike T., Swampeast MO

A method to ensure dry steam even if such steam is produced at sub-atmospheric pressure?

mtfallsmikey

Too early in the am to figure it out

But Dan, when are you bringing this show to the D.C. area?

Paul Fredricks_3

That's sort of what I was thinking too. The tube is sealed at the top inside the unit. Air enters under the fire to make the flame hotter. As the air in the sealed side of the tube heat up, it expands and forces the water down the tube and restricts the amount of air that can get to the flame. As the flame cools so does the air in the tube causing it to contract. This pulls the water back and lets in more air.

Steve_35

C'mon, Dan. Have a heart. What is it?

[Deleted User]

Got it.

See the hockey stick? It's the global warming control.

Darin(in Michigan)

Just a hunch

Is it a pressure guage?
Darin

Paul Fredricks_3

I spoke to Dan at NY Ugly. My post above is fairly acurate, except the liquid is mercury and the unit is a stove. Movement of the mercury controls the amount of air let in which controls the temperature of the fire.

Joe_75

The old Kalamazoo cook stoves used a draft like this. Worked good