My indoor heater for my shed

[johanw]

Hi, i built a small heater for my shed and it works so i'm happy but it smokes a bit in the start and it doesn't roar that loud as other stoves.



The temperature is 400c or 752f on the barrel i guess and other have 1000c.



Maybe my chimney is to small it is the same size as the inlet when its wide open.



Any ideas?

[fuegos]

Hello Johan .& welcome to the forum.There are a number of issues with your stove .The first question i would ask is how did you come to design this ? the principles of rocket stoves , as i understand them as a beginner are that high temperatures are achieved by having a firebox that concentrates heat , turbulence that mixes wood gas & air & restriction that slows the flow of gases through the system.Thermal mass that acts as a storage is also important.Riser temperatures of 1170 C have been measured. I would suggest a visit to batchrocket.eu/en/ for a comprehensive explanation of the theory & practice of rocket stoves.The stove you have built is a superb example of great welding & fabrication skills , design and planning , skills that will give you a great advantage if you build a stove from firebrick ceramic fibreboard or castings.

[johanw]

Thanks fuegos

Well, it's a k-style rocket with gravityfeed and removable ashtray inside a barrel with second air inlet in the swirl for total combustion, built of 88 mm 3.5 "stainless steel tubes with 2 convection tubes in floor, wall and ceiling. And a reflectorplate that hangs down in front of the outlet so only cold co2 goes to the chimney that I can hold my hand on after a meter all in the size of 30x50x70cm and weighs in at 60kg and is only to raise the temperature of the air quickly I do not need heat after I go home so this is how it should look and i don't even have a box to think inside of...

It is the radiated heat that is 400c, the temperature is over 1000c before the riser.

My next stove will be a rocket mass heater on my deck when i have put the glass in it then it will be different.

[fuegos]

400 c radiated heat is pretty good ....even though you just want a space heater i still think that a batch box with a large bell would be better ? also it would mean that you don't have to constantly load the K tube ...you can run some numbers as regards to how much wood you burn = BTUs & the size of
your space + the rise in temperatures you require.Even with a high efficiency burn a 3.5 inch tube is a very small firebox.Even 330 stainless will be subject to spalling at 1000 C although with 3.5 wall thickness it will last a fair amount of time.Still it looks great & like it should be in the side of a V8 , or maybe on the top , connected to a supercharger ?

[johanw]

Hi I have built a pellet chute for my Rocket Stove so I don't have to babysit it all the time.