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Cobbling up a workshop heater.  RSS feed

 
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Hi everybody!

Well, i spent some time at my new workshop, making a prototype, to see what's possible.

It's a seven incher core, with lousy dimensions for the firebox. At 3 barrels for the moment. I hope i can get 5. It's all drafty, there's gaps as large as 1/4 around some tubes, and nothing leaks outside of the barrels. No P channel for the moment. No door.

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Location: US, East Tennessee, north of Knoxville
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Hey Max, your new shop batch-box prototype looks like it should throw some serious heat. Nice looking build.

That is an interesting heat riser made of double-wall Class-A? insulated metal chimney pipe with the addition of an inner square liner. Is the square inner liner made of insulating refractory?

 
Satamax Antone
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Byron, i't the Landini flue elements i have been prototyping with for a while, they're refractory with grog, suposed to cope with 400C° continuous, 1000C° for 30 minutes. They seem to hold well. The shiny bit is a bin, reclaimed from a skip Insulated with a mix of perlite and vermiculite. For the moment, it's soo drafty with gaps, that it cools off way too fast! Talking with Peter about adding rocks, and may be two more barrels!
 
Satamax Antone
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First burn from sunday night. There's holes everywhere, and none smoking back.

 
Satamax Antone
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On my way, or should i say it's alive!


Yeeee fucking hell haaaaaa!

This is a cross between my two systems, the current one, and the future one.

Can you imagine a 18cm square heat riser. With a weird shape uninsulated batch box, and V bottom secondary air. Running a 8.21 ISA all metal double bell?

Here it is!




You just can't immagine how chuffed i am. That exceeds previsions. A 7 incher, supposedely could cope with may be 8m² of massonry single bell. Here i'm in double bell mode, with all bare metal arangement.


Madness, i tell you/

About 8m high chimney. And 20x20 sqare with rounded corners.

From

http://donkey32.proboards.com/thread/1757/floor-secondary-air-channel

Well, sorry guys and gals. I never thought it would work that well.
 
Satamax Antone
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Some guys at Donkey complained that the pics weren't visible anymore. So,  i re post these here. In hope it can help people.

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Satamax Antone
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Sum more.
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Satamax Antone
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And another batch!

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Satamax Antone
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Final pics of the original thread.

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Satamax Antone
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Since then, few mods have been done.

I added a fugly firebrick wall, to hold the air entrained concrete blanks.  (thr white stuff) Which were cracking because of the core pushing on them, and because of the heat.

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Satamax Antone
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Lately, i added a nice cooktop, given by a friend.

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Satamax Antone
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And made a grid shelf, yesterday, to use as a oven. This is lovely unexpected result. It works wonders, but, I have burned myself twice in two days.

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Satamax Antone
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Cooking on the new cooktop.

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Satamax Antone
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And the result of three winters of intense heating on metal.

This is the bottom of the metal tank, where it acts as the firebox top. With the already replaced once P channel. I stuffed all this with rockwool for this winter. I'll see what i feel like doing yo repair this one of those days.
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The top of your firebox looks like it's heavy steel.  What thickness is it and doesn't it get too hot to cook without burning?
 
Satamax Antone
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Graham Chiu wrote:The top of your firebox looks like it's heavy steel.  What thickness is it and doesn't it get too hot to cook without burning?



15mm steel. 47x80cm.

And since the firebox is not everywhere under, i can regulate the heat by moving the pot. You should make yourself one of those rocket. Perfect for cooking. But if you don't need the heat, forget it!
 
Graham Chiu
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Might be good for pizza though.  What temperatures are you recording on the cooking plate over the fire?
 
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Looks good Max!  Great photo's .   Thanks for showing us the updates !  Dinner looks very good...
 
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Great, there seems to be so much scope for fresh ideas and your cooking plate at a sensible height is inspiring.
I would not of thought it gets to hot?
 
Satamax Antone
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Fox James wrote:Great, there seems to be so much scope for fresh ideas and your cooking plate at a sensible height is inspiring.
I would not of thought it gets to hot?



I don't get the thermometer out often, so i haven't tested the new plate, but hot enough is the word. Basically i i sprinkle a handful of water on the steel plate, and if it rolls, bubbles away, without wetting the plate, i know it's a bit too much for cooking directly on the plate.

https://en.wikipedia.org/wiki/Leidenfrost_effect

 
Satamax Antone
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One thing, when i will need to change this riser. I will most certainly make a broken riser

http://donkey32.proboards.com/thread/1023/accidental-discovery

To be able to use the full front window as a oven.
 
Graham Chiu
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Satamax Antone wrote:

https://en.wikipedia.org/wiki/Leidenfrost_effect



As this occurs just under 200 deg C, isn't that the right temperature to sear steak ( Maillard reaction )?

BTW, I'm a little confused about the use of steel in your burn chamber.  Aren't we told that we shouldn't do this?
Or is it the expectation that you will need to replace the steel in a few years time?
 
Satamax Antone
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Graham Chiu wrote:

Satamax Antone wrote:

https://en.wikipedia.org/wiki/Leidenfrost_effect



As this occurs just under 200 deg C, isn't that the right temperature to sear steak ( Maillard reaction )?

BTW, I'm a little confused about the use of steel in your burn chamber.  Aren't we told that we shouldn't do this?
Or is it the expectation that you will need to replace the steel in a few years time?



Yes Graham, but when you have no choice!

I had tried a metal cooktop on the firebox of previous batch prototypes, and that survived. So i thought my square "barrel" would survive, but it didn't. Normally, the whole stove can be dismantled, without touching the bell.
 
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