Post by vorvadoss on Nov 30, 2013 7:48:50 GMT -8
Hi!
Bad netiquette to have a 1:st post filled with questions...BUT, on the other hand...I've lurked and searched quite a bit and I just don't seem to find what I'm looking for. So here I go:
I'm about to construct and manufacture a drying chamber (hitemp) in order to completely dry (and push towards the edge of pyrolysis) biomass of various kinds in order to conduct experiments and get data, in regards to pyrolysis and biochar/terrapreta. I have several options, but the idea of using a Rocket Stove Mass Heater as the heat source is kinda interesting. These are experiments that yours truly and a few friends are involved in. I'm in charge of the technical side-The dude who knows how to weld, calculating heat transfer and has a well equipped workshop and who furthermore likes to flare of noxious fuels from esotheric equipment in the middle of the night...We are a small group who used to work within the Biochar Project at Uppsala University (Sweden).
The proportions etc. of the rocket mass heaters are pretty well established, they can of course be finetuned (which is one of the aims of this forum)...and there might be new and groundbreaking stuff in the future. This forum is a prime example of diehards who within it get's just the perfect mix of rigid thermodynamical science and procedure, along with empirical work, trial and error, by enthusiasts out in the woods. Sorta mix between Edison and Tesla. Okey, I wandered of quite a bit...
Here's the thing:
I need to push the RMH to radiate/transfer as much heat as possible in the "first stage", the drum/container before the theoretical accumulation in...whatever. Really, what I need is to push it as far as possible towards getting the radiating cylinder glowing red. The experiments will need data on direct heat transfer from a glowing/close to glowing object->biomass as well as the RMH to be used as the main heat source via radiance/convection.
So, given the fact that I want to push it towards glowing/high radiance, if I make a system (min. 6" pref. 8"), should I modify it by making the cylinder/drum taller than usual and have a (maybe) have a slightly lesser gap between the riser and the outer shell, this in order to increase the velocity of the gases, and thus the heat transfer to the outer shell? As far as I'm concerned this seems reasonable, but I've been wrong more than once in "what seems reasonable"...ideas, input, opinions, anyone?
Thanks, Erik
Bad netiquette to have a 1:st post filled with questions...BUT, on the other hand...I've lurked and searched quite a bit and I just don't seem to find what I'm looking for. So here I go:
I'm about to construct and manufacture a drying chamber (hitemp) in order to completely dry (and push towards the edge of pyrolysis) biomass of various kinds in order to conduct experiments and get data, in regards to pyrolysis and biochar/terrapreta. I have several options, but the idea of using a Rocket Stove Mass Heater as the heat source is kinda interesting. These are experiments that yours truly and a few friends are involved in. I'm in charge of the technical side-The dude who knows how to weld, calculating heat transfer and has a well equipped workshop and who furthermore likes to flare of noxious fuels from esotheric equipment in the middle of the night...We are a small group who used to work within the Biochar Project at Uppsala University (Sweden).
The proportions etc. of the rocket mass heaters are pretty well established, they can of course be finetuned (which is one of the aims of this forum)...and there might be new and groundbreaking stuff in the future. This forum is a prime example of diehards who within it get's just the perfect mix of rigid thermodynamical science and procedure, along with empirical work, trial and error, by enthusiasts out in the woods. Sorta mix between Edison and Tesla. Okey, I wandered of quite a bit...
Here's the thing:
I need to push the RMH to radiate/transfer as much heat as possible in the "first stage", the drum/container before the theoretical accumulation in...whatever. Really, what I need is to push it as far as possible towards getting the radiating cylinder glowing red. The experiments will need data on direct heat transfer from a glowing/close to glowing object->biomass as well as the RMH to be used as the main heat source via radiance/convection.
So, given the fact that I want to push it towards glowing/high radiance, if I make a system (min. 6" pref. 8"), should I modify it by making the cylinder/drum taller than usual and have a (maybe) have a slightly lesser gap between the riser and the outer shell, this in order to increase the velocity of the gases, and thus the heat transfer to the outer shell? As far as I'm concerned this seems reasonable, but I've been wrong more than once in "what seems reasonable"...ideas, input, opinions, anyone?
Thanks, Erik
