Replace j tube with batch-box

[independentenergy]

Hi, the bricks I use in the core are from an Italian company, they are the industrial type and are used in foundry ovens.
They are very hard to cut them I have to lubricate the diamond disc with water.
the slabs are of the same type, it seems they contain iron because sometimes sparks come out of the cut. they are quite expensive at €4 per brick.
the mortar always from the same company is a ready-made mortar of industrial specifications, very resistant to heat but with a fair mechanical resistance.
the company I get my supplies from is called Unistara.
I've been using them for 8 years in a batch-box of 150 and they are discreet

[fruitbat]

Thank you for the information- sounds like you have a good supplier of ideal dense firebricks and slabs!

Slabs like that are not readily available in the UK, casting your own or using kiln shelves are the only real option...

[peterberg]

The testruns without the superwool liner left and right of the port and a second liner at the back turned out to be dramatically different from earlier ones. Both runs went into thermal runaway, showing very low O² and absurdly high CO levels, way beyond the diagram. And with black smoke leaving the chimney, of course. It might be possible you need a partially rebuild and thinner 30 mm refractory bricks above the level of the port.

It's always a risk to build something based on an ongoing experiment... Sorry.

[independentenergy]

Hi Peter, I am aware of the risks of a construction yet to be tested, thank you for warning me, I am going slowly to avoid having to redo everything.
I am at this point in the construction so it is still possible to make changes without breaking anything:

drive.google.com/file/d/1OyROD5fekpqk70Ev8cQjkq03fwQgjdzW/view?usp=drivesdk

So you suggest Is it correct to leave the depth of the door at 6 and reduce the part of the riser above the door to a thickness of 3cm?
I can leave the rest of the riser at core size and put superwool on it for testing. When it's final I can glue refractory boards of the correct size.
in this case, however, the riser is larger than the size of the core because it has been moved by 3 cm

I have a schetchup file to share, could you kindly tell me which version of schetchup you are able to open, it used to be 8, now which version do you use?

[peterberg]

I'll answer your post for a way to change your current build one of these days.
Please send your skp file, I am able to read these upto the 2017 version. Version 8 is lower so this will be alright. I'll amend the file and return it.

[independentenergy]

Dec 13, 2023 5:25:17 GMT -8 peterberg said:

I'll answer your post for a way to change your current build one of these days.
Please send your skp file, I am able to read these upto the 2017 version. Version 8 is lower so this will be alright. I'll amend the file and return it.

this is the core design as I understood it. it is made to the size of the bricks I have. It was drawn with Schetchup 17

drive.google.com/file/d/1Pv_ECsVGB6pBcpu0UQgc53Vv4RFsRNQB/view?usp=drivesdk

[peterberg]

Here's an amended 130 mm shorty. The lower portion of the riser box is done in 60 mm bricks, the upper portion in 30 mm bricks. The dimensions aren't really correct, it's roughly done, generally. But you'll get the idea: you don't need a superwool liner inside, this implementation is done in brick directly.

pberg0.home.xs4all.nl/pictures/dev2023-2024/

Follow the link and look for shorty2.skp at the bottom of the page.

This is the latest state of affairs, the configuration might or might not be changed, the file will be deleted in a couple of days.

[independentenergy]

thanks Peter, I saw the drawing and noticed that the dimensions of the base of the riser up to the port are those of the chimney (130) then the riser has the dimensions of the batch box.
I will try to adapt the measurements with what I have already built without breaking anything.
I still have time for the construction I can wait for any changes and improvements.

[independentenergy]

I designed a complete core it should be correct, at the moment the development should be at this point, I think the firebox is also defined as the riser-box I think.
the vertical riser could perhaps still be modified from what I understand.
the only doubt I have left before continuing with the construction is the door, I tried to resize the one on the DSR3 but I have no references and I don't know if the measurements are correct.

drive.google.com/file/d/1bIdmFPdbe7Q5LKLxa7wQz96Ji84e1FUk/view?usp=drivesdk

[peterberg]

I just checked the door frame, it's made out of 60x40x2 mm steel tube. So what you've done in the drawing is definitely too small. The air inlet is about 50% of chimney csa, the ducts are 30% of csa together, the slits in the posts and lintel together 50% again.
This is the latest state of affairs, could be changed in the future.

[independentenergy]

I redid the drawing, are the dimensions of the air intakes correct now?

drive.google.com/file/d/1bl5mr6-Cr5xlom_gEFWnc0Pe6XZNT1VS/view?usp=drivesdk

[peterberg]

I am terribly sorry, but no. The construction is wrong now, have a close look at my drawing and try again.

Some aspects: the tube should be on flat, the 60 mm side is meant to be the front.

There should be two U-profiles with the open side to each other where the opening of the air inlet is.

This opening should be 50% of the chimney's csa which is 66.37 cm², the slits in the posts and lintel together should be equal to that.

The slits in the posts should start at about half height of the firebox, measured from the floor of the firebox.

[independentenergy]

I'm sorry Peter, but I really don't understand how this door is made...I'm really frustrated

[peterberg]

Dec 20, 2023 11:46:29 GMT -8 independentenergy said:

I'm sorry Peter, but I really don't understand how this door is made...I'm really frustrated

Don't worry too much, I'll see into making a drawing that's clear enough. The door itself is fairly straightforward though.

[independentenergy]

thanks Peter, in any case is the size of the front air intake correct?
I calculated half the CSA of the system which is approximately 66