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Post by carson on Oct 6, 2012 8:45:49 GMT -8
I know this isn't about rocket stoves,specifically, but I was hoping I could ask: does anyone think bell stove principals could be applied to metal wood stoves to improve their effeciency? In other words, could someone build a bell stove out of steel? Something to hold the gases longer and allow the "free gas flow effect" to take hold.
thanks
carson
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Post by Deleted on Oct 6, 2012 10:12:01 GMT -8
I know allow the free gas flow effect to take hold. There is nothing like a "free gas flow effect" The fluid mechanics describe gas flows as "Compressible flow". en.wikipedia.org/wiki/Compressible_flowIf you mean "Free Convection Flow", that is not applicable in this case. Iron is a pretty good heat sink by volume, not weight. Sufficient mass in iron or steel is rather expensive. |
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Post by carson on Oct 6, 2012 14:14:04 GMT -8
I guess I should have said 'free gas movement'. And if there is no such thing I bet fellas like Kuznetsov and others who build masonry heaters will be suprised. What I really wanted to know, I guess, is whether anyone has any thoughts on whether a bell stove can be made out of metal and kept to a reasonable size for a living room, ect.
carson
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Post by satamax on Oct 6, 2012 16:28:10 GMT -8
I guess I should have said 'free gas movement'. And if there is no such thing I bet fellas like Kuznetsov and others who build masonry heaters will be suprised. What I really wanted to know, I guess, is whether anyone has any thoughts on whether a bell stove can be made out of metal and kept to a reasonable size for a living room, ect. carson Well, if you read over here, there's few examples of metal bells, and other places too. I've been rumaging through my mind and the net for ideas. If you want rocket and bell, ask Peter. Just an idea, if you want a proper rocket stove as per the rocket stove principles, and a bell after it. It's possible. And if you want more surface area, old fuel tanks can be found everywhere for cheap. Something like this, i'm prety sure, could make à nice bell.  |
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Post by carson on Oct 7, 2012 8:49:00 GMT -8
yes, that's along the lines i've been thinking about. i've read peterbergs rocket/bell experiments. amazing. no way for me to accomidate that kinda mass. so, i'm thinking metal,smaller,although with less heat retention.
thanks
carson
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Post by peterberg on Oct 7, 2012 9:13:00 GMT -8
Hi Carson,
Yes, it's perfectly possible to construct a bell out of metal. In fact, it's simple really. A couple of things to keep in mind though.
The cross sectional area difference between the entrance to the bell and the bell itself need to be quite large. As a minimum, about 1 to 4, better 1 to 10 or more. That's needed to slow the velocity of the gases down sufficiently in order to let gravity do its thing.
Next important: both the inlet and outlet of the bell need to be in the lower regions, close to the bottom. When the floor area of the bell isn't overly large, it's best to maintain a small height difference. The inlet just above the outlet will avoid a bypass effect.
Is this clear?
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Post by carson on Oct 16, 2012 16:15:39 GMT -8
Yes, that is clear. sorry for the delay in my reply. I appreciate your response. Now I need to look at some reasonable dimensions for 'in home' stoves.
thanks again,
carson
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