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  #11  
Old 08-18-2010, 12:40 PM
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Default Re: How best to heat water using excess heat from oven

David- I love the look, but am unsure of how practical such an idea might be.

Would the water get hot enough and, if it did (because the insulative layer on top of the dome was thin enough), would you be robbing the oven of so much heat that proper cooking temperatures would impossible to achieve?

My concern about heat loss has sent me into a different direction. Our property is private acreage with plenty of wood. Off the downwind corner of the pavilion which will house the bread oven will be a fire pit for "campfires". We have an old cast iron tub which will be placed up on blocks inside the pit at the edge. When I want a soak, I'll build a fire directly below the tub to heat it up. Not quite a hot tub, but big enough to soothe one man's aching muscles!

Good luck with whatever you attempt.

Aloha, Bruce
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  #12  
Old 08-18-2010, 02:34 PM
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Default Re: How best to heat water using excess heat from oven

my idea was to use the dome merely as a heat generator to heat the water rather than as a cooking oven. I would probably make the dome in cartable and make it fairly thin, about 1.5" thick I would guess.
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Old 08-18-2010, 03:50 PM
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Default Re: How best to heat water using excess heat from oven

The romans had this very idea for heating their baths, the hypocaust.





No word on how they kept the water out of the firebox.
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Old 08-19-2010, 01:26 AM
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Default Re: How best to heat water using excess heat from oven

Thanks for that, it's making me even more keen to get tis project beyond a mind plan and start committing to some work. Going to Pompeii in Oct. that should also generate some interest.
Dave
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Old 10-01-2010, 11:47 PM
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Default Re: How best to heat water using excess heat from oven

1. Convection doesnít function when the hot object is above the cold object.

2. C. Convection
3.Their temperatures rise until they are able to radiate heat away into space as fast as it arrives from the sun.

4. I have a glass of Pepsi over ice sitting on the counter. It has been sitting there for fifteen minutes and still has ice in it. If the room temperature is 270 Celsius, what is the temperature of the Pepsi in the glass?
A. 00 Celsius B. 290 Celsius C. 13.50 Celsius D. 270 Celsius
there is mistake in stating this problem. Pepsi will evoporate, and cannot exist in liquid form at 270* Celsius. you must say 270 Kelvin, than anser is A: 00 celsius.

5.Heating the water in an opened container at the top of a high mountain where the pressure is less than 760 mm Hg.

6.Add heat and reduce pressure on ice.

7. you mean to say that the water in the tub will freez, than ans is 0 * C

8. Put the lid under warm water for a few minutes, but donít let too much water hit the bottle

9. To avoid heat transfer to the colder object by conduction.
10. Radiation heat transfer
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