Benjamin Dinkel

Rocket Scientist
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since Oct 01, 2019
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Biography

Environmental engineer with a masters in renewable powers using the magic powers of permies.com to learn all about the "rocket" technology and innovate with the fellow rocket scientists.
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Province of Granada, Andalucía, Spain
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Recent posts by Benjamin Dinkel

Hey Gerry,
thanks for the answer.

I don’t see any other way. But then there are lots of benches with the chimney at the far end.

When I go check the site on Sunday I’ll keep your idea in mind. I like it.
13 hours ago
So I'm still wondering about the usefulness of this "top of the bench" bypass.



I would only gain about 6" height difference between the regular opening into the existing chimney and the "top of bench" bypass opening.

I will go for a T (or other opening) anyways. For inspection and priming. But I'm wondering if the bypass will be useful.
Looking closely at your foto I think I can see a new layer forming. Is that the case?
If yes, it’s definitely still alive. The kombucha might not be as bubbly, but just drink or compost some of it and give it another round of new sweet tea and it’ll probably gain some more vigor.
3 days ago
Hey Nancy. Mine has survived at least 3 months at room temperature without food. It took a while to come back to life. So fingers crossed for yours. Don’t give up on it yet!
3 days ago
That’s looking great, very clean fitting cuts for the manifold! I’m impressed.
12cm over the riser is fine.
And 8cm should also work. 4cm insulation and 4cm cob, no prob.
What are those curious chimneys in the background?
1 week ago
Thanks Glenn. Yes, I was counting with another barrel for scrap cuts.

Does anyone have some insight on the (lack of) the bypass? Is a "top of bench" bypass better than nothing?
If I imagine the flow of the gases, I would say theoretically yes.
1 week ago
Here's a first sketch:


The core and a small part of the bench are going to be in the kitchen.
Then the bench goes through the wall and a bigger bench is going to be located in the living room.
At the end of the bench it connects to the existing chimney (the little square on the right). Maybe the chimney will get a metal insert, maybe I'll use it as is. There's no option for a new chimney at another point. The roof was just renewed and we don't want to penetrate it anywhere else.

The biggest challenge I see at the moment is not having any bypass option. I'll be installing an opening where we connect to the old chimney to have an option to prime the chimney.
I could also install an extra exhaust pipe on the top of the bench, allowing the warmest air to exit in the beginning. That could act as kind of a bypass. Although the exhaust would still have to travel all the way to the end of the bench. Just not sink to the bottom.
Any opinions?
2 weeks ago
Hey Mark,
I'm going to be building a J-tube with a half barrel bench soon. So I was wondering whether you finished it and whether you have some advice, some lessons learned, something you would do differently this time?

How thick did you cover the top spot of the barrel in the end? Is the tenperature comfortable?

Thanks in advance
2 weeks ago
Unfortunately this build got postponed indefinitely. But I'm planning another, bigger J-tube for this autumn.
2 weeks ago