Jeroen Bracke

Hi
Tonight I was testing the rocket stove again and I think I found a major error in my design.

I kind of broke the stove down from a j desing to a L shaped rocket stove to minimise the smoke out of the inlet.

Now that I could see into the fire chamber I see that the coil of the heater in the first  35cm of the riser was sitting   on the bottom of the fire chamber...
Practically blocking 75 percent of the flow from the fire chamber to the riser.
Because there is no space between the coils for air to pass through them.


I think I will just lift the coil 20 cm so it hangs in the riser a bit higher above the fire chamber

OR...

Should I put the coil in the horizontal part of the burn chamber and not on the riser so it lays in the fire and the riser can get hotter and create more draft ?

Greets
Jeroen

I have been looking around what I can buy online and local .
What I found is bags of 25 kg "fire clay"
Wich is powder used to make fireproof clay stones.

On the other hand I can also buy heatproof glue cement for making outside barbecues and so on .
I think tis could also work but is more permanent.

And option nr 3 is heatproof cement but I don really like the looks of the think joints.

What do you think would be the best option ?
Is the clay weatherproof in a wet climate?

The feed tube and the riser have the same diameter but the burn tube is slightly less high.

Also I think I could make the burn tube longer.

Are there perfect ratios for a rocket stove ?
Greets jeroen

I wil try to use some clay mortar to seal everything.

About the safety.
My stove now heats about 200 metric liters per hour from 20 ish to about 60 degreas.

And the coils is special made for swimming pool heaters from stainless steel.
The black tubes are not made from heat resistant material so the instant my pomp stops circulation by power failure or anything the hose almost instantly melts and bursts .
After that the coil just emptys out .

I don't see any dangerous situation but please tell me if my logic is faulty.
Greets jeroen

Hello
I am Jeroen from Belgium and this is my first attempt at a rocket stove.
Inside the riser is a 9 mm coil where water is pumped through to heat my hottub.

The stove works great for let's say the first 45 min or so.
But then it starts to smoke and even burn through the wood and air intake.

I think it may have to do with the fact that the brik gets hotter in the intake than in the chimney.

Oh and it is stacked so I can adjust the schape quik but I think I get lot of draft in wrong places from these gaps.

Anny tips or ideas ?

Greets from belgium