@carlschultz69 This is very good work, how much heat do you exhaust to atmoshpere? I am trying to build a system that will recover waste heat and convert to electric and hot water. see my channel for more info.
In the late 70s a Vermont company designed and sold a water-based solid fuel furnace where the fuel bed was refractory blocks with two horizontal tubes running full length in the refractory, and several vertical tubes down to these from the concave surface of the fuel bed. A flue fan forced exhaust up the flue, after the flue gas heated the water. It maintained combustion heat up to 22 hours after the refractory was heated, to start subsequent burns.
Ah, cool. So what are you burning? I heard once that with a gasifier such as yours, even green wood is an efficient fuel, though I haven't confirmed that.
Another nice thing about your design is that with the exhaust fan and the gasifier, there's much less chance of creosote build up. In fact, you could go horizontal on your venting for quite a while provided there was nothing that was heat sensitive near it (duh).
This "furnace" was designed as an experimental unit so an air to air heat exchanger was much cheaper to construct and the energy can be dumped into the atmosphere. If I were to heat a house with this design, I would replace the existing heat exchanger with an air to water heat exchanger and store the energy. It takes a little while to get a real efficient burn though so ideally you'd like to fire once a day in this situation.
Very nice. So, if this is used to heat your house, what do you do when it gets warm enough? Do you shut it down or keep it running? Are you able to store the heat somehow?
I would like to eventually do something like this, but I was thinking about getting 4 large used propane tanks (the 6-8 ft kind) to store hot water in and circulate as needed, and use a small water/air heat pump when the storage tanks get below 90 to suck as much heat out as possible.
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AntiVaccine2 1 month ago
how about a drawing of this?
josephdupont 3 months ago
@carlschultz69 This is very good work, how much heat do you exhaust to atmoshpere? I am trying to build a system that will recover waste heat and convert to electric and hot water. see my channel for more info.
DoLpH1983 4 months ago
In the late 70s a Vermont company designed and sold a water-based solid fuel furnace where the fuel bed was refractory blocks with two horizontal tubes running full length in the refractory, and several vertical tubes down to these from the concave surface of the fuel bed. A flue fan forced exhaust up the flue, after the flue gas heated the water. It maintained combustion heat up to 22 hours after the refractory was heated, to start subsequent burns.
claudius2u 5 months ago
Very cool set up..
katz217 8 months ago
Interesting. Your design is a lot more advanced than most DIY stoves.
oldsteamguy 1 year ago
Ah, cool. So what are you burning? I heard once that with a gasifier such as yours, even green wood is an efficient fuel, though I haven't confirmed that.
Another nice thing about your design is that with the exhaust fan and the gasifier, there's much less chance of creosote build up. In fact, you could go horizontal on your venting for quite a while provided there was nothing that was heat sensitive near it (duh).
jeffjohnvol 1 year ago
This "furnace" was designed as an experimental unit so an air to air heat exchanger was much cheaper to construct and the energy can be dumped into the atmosphere. If I were to heat a house with this design, I would replace the existing heat exchanger with an air to water heat exchanger and store the energy. It takes a little while to get a real efficient burn though so ideally you'd like to fire once a day in this situation.
carlschultz69 1 year ago
@carlschultz69 this is fascinating as heck. Could you take the excess heat and drive a turbine for generating electrical energy?
stevening62 1 year ago
Very nice. So, if this is used to heat your house, what do you do when it gets warm enough? Do you shut it down or keep it running? Are you able to store the heat somehow?
I would like to eventually do something like this, but I was thinking about getting 4 large used propane tanks (the 6-8 ft kind) to store hot water in and circulate as needed, and use a small water/air heat pump when the storage tanks get below 90 to suck as much heat out as possible.
jeffjohnvol 1 year ago
Otherwise you can do something like the Bradley Enterprises Outdoor Wood Heater:
Google: outside wood heater
carlschultz69 1 year ago