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Post by yoorname on Nov 25, 2018 4:17:57 GMT -8
Yes, it is undersized. The smoke coming out the mass heater is around 80°C and it's only steam. So the heater works well (Peter said it in another thread I've opened last March) but less, in size, than the half of what I should have according to the volume of the place/room it heats. So you built it less than half the size you should. Because of that, you tend to feed it semi-continuously which creates the enormous glow bed problem. I would say you let the glow bed die down on its own until it's nearly all black and close the air inlets. That would solve this particular difficulty, I'd say. Creating another problem on the way, not enough heat for the place where it's situated. Looks like riding a Citroën deux chevaux on the motorway and complaining it doesn't do 160 km/h. Looking around for a solution to this alleged problem by adding a turbo charger and an Abarth exhaust system for instance. You read the Uzumé website so you've come across the sizing recommendations of Yasin which says to always oversize, not undersize. This batchrocket design is specifically meant and developed for mass heater purposes. Your 250 liter boiler vessel won't hold heat for long so you are using this combustion core as a bog standard cast iron stove. One could expect it to be absolutely riddled with problems, not just one. It's winter now but the solution, without creating another problem again, would be to build another one. Properly sized, using the DSR2 setup for example which proved to be quite reliable, plus a lot of mass to even out the heat. I am terribly sorry, but I can't see it any other way. Thank you for answering my question. I am not complaining that my Stove does not heat enough, I love my stove. I am just saying that there is no way to remove ashes from a Batch Stove otherwise than by waiting it to cool down and keep the ashes out with a shovel and a broom, and that looks amateur to me. I think that a good stove should have an elegant mechanism to remove the ashes, that's all. And it turns out that in my case, not only it will be elegant but also it will help me somewhat. Maybe I shouldn't have given so much details and only asking for how to remove the ashes with style. DSR2 ? I don't know what it is. Google gave me zero results for "dsr2" and only a couple of threads here for "dsr2 stove", but these threads talk about many different things, does not say what a dsr2 is... So if you have a link pointing to a page that describes what a DSR2 is, it is welcome ! :-)
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Post by yoorname on Nov 25, 2018 4:59:40 GMT -8
Even on Youtube I can't find something about DSR2. What is it exactly ?
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Post by peterberg on Nov 25, 2018 5:41:07 GMT -8
Its full name is Double Shoebox Rocket, DSR for short. The original design (2016/2017) proved to be not very reliable. This year I tried another low headroom variant, testing sequence is completed just some weeks ago. Because of the similarity with the first DSR I called this one DSR2. Pet name for both: Désirée. Here's the development thread of the first one: donkey32.proboards.com/thread/2341/different-batch-core-riser-allIt's quite a long story, albeit quite interesting from an experimental point of view. See below the other thread, this started out as a tapered riser to end up later as another shoebox. donkey32.proboards.com/thread/3379/tapered-riser-batch-core-dsr2This latter core design might be useful to you. I see what you mean with loving your heater but wanting an elegant solution to your current problem. But it won't be anything else than a patch in my opinion. That said, a solution would be an ash box below the firebox, with a slit in the back half of the firebox' floor and a very tight closing ash door in order to prevent overload problems. This would require a rebuild, so that's why I think it would be a good time to consider different solutions available.
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Post by yoorname on Nov 25, 2018 5:56:38 GMT -8
Ok, thank you for the links.
My Stove if build from iron and 150 kilograms refractory concrete, so there is some mass to heat.
I'll take a look the links. Is there any excel document that gives the dimensions or is it still under development ?
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Post by peterberg on Nov 25, 2018 10:33:56 GMT -8
Still under development, no firm data yet, working proportions only. But if you have a good idea what you want I am willing to calculate it for you, no problem.
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graham
Junior Member
Posts: 74
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Post by graham on Nov 25, 2018 12:10:16 GMT -8
Peter, are there any skp files for any of your current test builds of the DSR2 available?
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Post by peterberg on Nov 25, 2018 13:24:07 GMT -8
Yes, there are some skp files because I design each variation in drawing first. Not yet available, just today I completed a cut-out view of both the main versions which generated the best results. Will be published in due course.
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