Okay... starting over. One thing I have learned from the initial overthinking is that it's easy to accept a bad design because you can just take apart and reuse the materials (given you have time). I only had it half built before I determined it was not making me happy but the real lesson there was: Don't try to build this in a panic!
So I'm changing it up. I've decided against tiling the wall behind the barrel, moved where the barrel will be, changed the system to a strat chamber, and I never could get that steel tube out of the cast perlite riser... but I'm going to give lining it with ceramic fiber blanket and see how well that goes with insulating the steel tube inside and out. I'll replace that riser before next season anyway. It's just that I need heat in this house (incidentally my on demand hot water heating is having issues too, so that's also cold). This house will be the death of me.
still a 6" throughout j-tube with 55 gallon drums (though I'm not sure how necessary after binging stove chat on repeat, thanks Matty!)
So where I'm going now is to address the poor insulation in this house (and the incredibly annoying, 3am rock n roll blasting, hot-rod wrenching neighbor who breaks my sleep) is to cob my interior walls. I stumbled into some of Chris's videos and dove deep on that one. The adjoining brick wall in this pic is, in fact not brick veneer, but a full brick wall inside of the original exterior wall. I have the exit, still going out that wall, but have an interior "juice box" pipe planned to run to the far end of the strat bench at an angle to catch the cooled gases. Am I correct in thinking that I can use the heat from the barrel, and to some degree, a portion of the angled pipe in the warmer "altitudes" of the chamber to facilitate draft? I have the run on the chamber mapped out to 10' and 5' (L) and 36" wide with the interior pipe/exhaust draw from the far end at a 19" ascension span from cool bottom to warm exit. Thoughts?
As it is finally warming back up outside, I'm able to get out and work a bit, allowing for the very slow curing time of the cob and fieldstone in courses. I'm slow to progress but I think that's a good thing in this instance! As to the cob, I've found that mixing it with wheat paste instead of water has made is chocolate mousse smooth and sticky but I'm only laying it on 1/8" thick at a time on the walls... Mud mentioned something about linseed oil (i believe it was) going rancid and it occurred to me the same could be true of the wheat paste if one weren't careful? It does seem to make it just a touch stickier in the cob, but what do you think about that mixed in for the cob on the fieldstone of the bench? Good idea/Bad idea/"What is wrong with you?"/no idea.
Still workin' it all out. You'll know I'm nutz when I tell you that I have become accustomed to using Paul/Chris/Matt/Erica and Ernie/and frankly, Neil DeGrasse Tyson videos as my every day, all day soundscape. I've been lulled to sleep, even, by their dulcet tones... (maybe that's just creepy?)
Jen