|
Post by wiscojames on Dec 23, 2017 20:49:33 GMT -8
I took the question to ask whether metal could be used as the storage medium, instead of masonry.
Slightly different question, but what about a three quarter inch-thick steel slab as the cap of a brick bell? Even directly above the riser, by say, a foot? Warping? Still doomed?
|
|
|
Post by coastalrocketeer on Dec 23, 2017 23:44:29 GMT -8
I took the question to ask whether metal could be used as the storage medium, instead of masonry. Slightly different question, but what about a three quarter inch-thick steel slab as the cap of a brick bell? Even directly above the riser, by say, a foot? Warping? Still doomed? A steel barrel top will survive many seasons just inches above a riser... The only issue I'm aware with a thick steel plate in that location is does it warp significantly when it heats up, and does your design allow for or somehow counteract/control that warping to keep things sealed...
|
|
|
Post by Orange on Dec 24, 2017 0:13:53 GMT -8
I took the question to ask whether metal could be used as the storage medium, instead of masonry. Slightly different question, but what about a three quarter inch-thick steel slab as the cap of a brick bell? Even directly above the riser, by say, a foot? Warping? Still doomed? Metal is perfect heat storage, very conductive and dense. Warp maybe if it's not cast iron, seal with ceramic rope or similar.
|
|
|
Post by Vortex on Dec 24, 2017 3:40:19 GMT -8
I took the question to ask whether metal could be used as the storage medium, instead of masonry. Slightly different question, but what about a three quarter inch-thick steel slab as the cap of a brick bell? Even directly above the riser, by say, a foot? Warping? Still doomed? Metal is good for heat storage so long as it can expand and contract without causing any problems to other parts of the stove. If you had a single piece 3/4" steel slab over a riser it would likely bow up a little in the center and the edges would rise a little in the middles. I've even seen it happen on very large cast refractory slabs on top of stoves, the center has to expand more than the surrounding material. Away from the intense heat or flame path metal is fine.
|
|
|
Post by Orange on Dec 24, 2017 13:12:18 GMT -8
wow, that's almost 2cm thick steel. But if it has "ribs" it's much difficult to warp.
|
|
|
Post by DCish on Dec 25, 2017 19:29:36 GMT -8
wow, that's almost 2cm thick steel. But if it has "ribs" it's much difficult to warp. The thing about metal is that it expands -- a *lot* -- as temps change. The greater the temp differential, the harder you have to work to keep it under control. Masonry is far cheaper and has a dramatically smaller coefficient of expansion, making it a much easier to work with material for high temp (especially high temp differential) applications.
|
|