Rindert, sorry to say this, but if you want counterflow you need to change direction of the water.
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I don’t think so. Cold water comes in at the bottom and goes out hot at the top. Hot combustion gasses go up the center chimney, but then they go down to the exhaust pipe. This will create a counter current.
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Especially a cold water startup, wouldn’t that create a situation where the condensates would fall back towards the burner? or when it shuts off after getting to temp, the condensate drops, and also the CO could come backwards with back pressure.
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Hopefully this part sketch of the pan helps. I does the task of keeping the cooled exhaust separate from the hot gasses as they come from the burner.
Rindert
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Ok. The j tube above is not yours. A bell works very well, but only if the flow is very low/ laminar. Peter Berg or Permies is a good source to determine the size.
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Yes, have built a few of Peter v. d. Berg’s stoves.
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Tom Holtontcholton717Premium Member
I built a charcoal maker somewhat like that It was a 55 gallon drum shaped into a cone with a sliding door on the base. It sits over a two foot section of an other drum. Burns small branches and stuff. Got the idea from Don Mannes charcoal maker. Char comes out almost fuel size. I’m going to start using it again shortly. I’ll post new pictures. This picture is when I first built it so it’s just sitting on a trash can.
When I first rejoined the site I had a discussion with Oregon Carl about reusing waste heat from charcoal making. My solution ended up being a combo radiant greenhouse heater and hot water heater. Haven’t used it yet. I think I only have one pic. It’s a 30 gallon compressor tank inside a 44 gallon well pressure tank. I’ll do better pictures or a video when I start using it. Inside the inner tank is a copper coil. Along side the heater is a 500 gallon water tank. The heater gets fed fuel from the top. Chunked wood would be best. As it burns it heats the water in the jacket between the tanks and other water thermosyphons up the coil to heat the water in the storage tank. Char can be continuously shoveled out an access door at the bottom and put into a sealed cooling container. I would still like to get more out of the flue exhaust. I’ll be thinking about that.
A water heater I built a while back to heat a water tank in the greenhouse when I was planning on doing aquaponics. First picture is of a charcoal kiln I never reported about after it was used. It worked fine but burned out after four years of use. The water heater also worked pretty well. It was fed chunks though a port in the top and char was removed from a port in the bottom as it built up allowing it to run as long as you were there to feed it. Too much fuel at a time absorbed some of the heat in the upper section of the coil so it was more efficient with only about half a load of chunks. It did take a while to get the water in the tank up to around 75F which was about optimum for keeping the 27 gallon totes full of planting mix I had at the top of the tank set a couple of inches into the water. The water in the jacket between the heater tanks provided ambient heat along with the Rocket Mass Heater on the other side of the GH. I never reported much about it because I quickly found out that trying to maintain a working greenhouse during our fairly rough winters was more than I could handle. Anyway the build did work if you were willing to spend all day tending it.
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