Dear Lloyd, what you require sounds like a possible application for the IntensiFire.
I can't promise you open source or off the shelf, or even the capacity yet to build what you are after. Probably won't get much biochar either. What I can offer is super clean combustion (zero CO and possibly zero PM10) particularly with auger fed fuel to keep combustion in the sweet spot. I have also built a prototype woodstove that will burn green wood with no visible smoke. Kind Regards Jason http://www.intensifire.co.nz/ On Wed, May 21, 2014 at 7:14 AM, Lloyd Helferty <[email protected]>wrote: > Crispin (and all), [CC; gasification list] > > This is a very interesting conversation regarding ND TLUD power (heat) > variability and its implications, and (as you know) I do have a keen > interest in this topic since being introduced to the TLUD 'stove' concept > back several years ago (by Dr. Anderson, when he came to Ontario to > demonstrate his small "Champion" stove and similar devices at the Laepple > farm in June 2009), especially since the TLUD is one of the few simple > technologies that can produce biochar cleanly at a small (or possibly at a > medium) scale for local use ~ while producing (hopefully) useful amounts of > energy (heat). > > What I am working on right now here in Toronto might interest you or > others on this list. > I have been approached by a business in Toronto that would like to be > able to implement a small-scale char-making technology at their > manufacturing site in the Toronto area (GTA) that would utilize the (dry) > 'residuals' from their food production process in order to make heat energy > that could lower their (fossil) energy use [natural gas costs] while also > turning their (dry) 'food waste' into a biochar (and/or high-char ash) that > could be re-integrated back into a (wet) food composting system > (vermicompost) that is already being implemented onsite at their operations > here in the city. > > The primary use of the heat would be to heat up water, but it would also > be welcome if it could be used in the preparation of the 'raw' food > (drying, roasting certain products to a certain temperature -- i.e. an > 'oven') that goes into their recipes, which includes 'fair-trade' sourced > (temperate and tropical) foodstuffs that have been either grown or imported > into Canada in bulk, and which are prepared on-site (including de-hulling > etc. of several of the key ingredients). > Essentially, this company would like to know if it might be possible to > come up with either a "customized" or an "off-the-shelf" system that has a > fairly small footprint (about the size of a shipping > pallet<http://en.wikipedia.org/wiki/Pallet#Dimensions>, > or ~16 sq. ft = 40" × 48", as commonly used in the food industry) that > would be able to meet the following requirements: > > > - Provides space heating and/or hot water heating (for their kitchen), > with the possibility also for using the heat for "roasting" their > ingredients (@ ~140 Celsius max. -- possibly using a heat exchanger, if > necessary). > - something flexible and rugged > - can accept multiple fuel inputs (different sized feedstocks, > different moisture/energy content -- not just woodchips) > - no smoky emissions (after-burner, if necessary) so that it can meet > local emissions regs > > > Of course they are interested also in custom of "commercial" gasifiers > [as well], but small systems (stoves) that could do the job they are > seeking might suffice, although they probably want the system to be as > automated (hands off) as possible to that the minimum amount of human > intervention is required... although it would need to be as low-cost as > possible (almost a "DIY" system -- they could actually make it themselves > since they do have some expertise, including a machinist & a "master > builder" who has built and operated a series of gassifier stoves for > several years and "who is more than capable of manufacturing" something -- > if they had the 'plans' for an open-source system/design that could do the > job). > > Ideally this company would be interested in seeing 2 or 3 designs that > might work for them (a few devices that they could initially assess)... so > that they could work with the designers to get more details. They would > then choose a final design that they would then incorporate into their head > office (operations), but then possibly also into a "franchise system" that > they are designing (and that would operate like a "food truck" would in > *any* city ~ except instead of the truck being electricity or natural gas > or propane-powered, the 'portable' food production/processing system would > operate partially off of its own 'waste'... and/or wood chips [or pellets] > that could be produced or supplied locally ~ possibly even from chipped > shipping pallets that have *only* transported food products -- i.e. > clean, 'food-grade' "green waste" like the type that can be found at the > back of nearly every supermarket in the country... including all the broken > ones.) > > > > Regards, > > Lloyd Helferty, Engineering Technologist > Principal, Biochar Consulting (Canada) > www.biochar-consulting.ca > 48 Suncrest Blvd, Thornhill, ON, Canada > 905-707-8754 > CELL: 647-886-8754 > Skype: lloyd.helferty > Steering Committee coordinator > Canadian Biochar Initiative (CBI) > CURRENTS, A working group of Science for Peace > http://www.scienceforpeace.ca/currents/ > President, Co-founder & CBI Liaison, Biochar-Ontario > National Office, Canadian Carbon Farming Initiative (CCFI) > Organizing team member, 2013 N/A Biochar Symposium: > www.carbon-negative.us/symposium > Member of the Don Watershed Regeneration Council (DWRC) > Manager, Biochar Offsets Group: > http://www.linkedin.com/groups?home=&gid=2446475 > Advisory Committee Member, IBI > http://www.linkedin.com/groups?gid=1404717 > http://www.facebook.com/group.php?gid=42237506675 > http://groups.google.com/group/biochar-ontario > http://www.meetup.com/biocharontario/ > http://www.biocharontario.ca > www.biochar.ca > > "Producing twice as much food with diminishing resources, without further > loss of natural habitats and biodiversity and in a changing climate may be > the greatest challenge facing humanity." > - Lloyd Helferty > > On 2014-05-19 7:38 PM, Crispin Pemberton-Pigott wrote: > > Dear Roberto > > I agree with your analysis. There is a lot of merit in keeping the > secondary flame in close proximity to the top of the fuel bed. The most > important is that the secondary flame is harder to put out with a slight > breeze (because it relights). The second is that when the primary air is > turned down to control the power, the secondary flame is able to remain hot > enough to stay alight. Combined with external, down-drafting secondary air > preheating (not like the Peko Pe) one can maintain the secondary air feed > ration under different primary air conditions. > > Read and heed! TLUD's are not succeeding in meeting the turndown ratios > required by ordinary cooking. To burn clean at different burn rates, > whatever the fuel, you have to control both the primary and secondary air > flows. > > While a 'double controller' can work, turning the secondary air down at > exactly the same time as the primary leads to a 2-3 minute period of very > high PM and or CO and VOC's because of the retained heat in the fuel bed > and stove body. This is worse if the combustion chamber is ceramic or cast > iron. > > If the secondary air feed it an automatic, buoyancy-driven supply, it > will draw in additional air as required during the cooling-off period. This > explains the strange layout of the air supply in a Vesto Stove which tried > to address the problems inherent in David Hancock's (very advanced at the > time) 1984 Tsotso Stove (which is still in production). > > Regards > Crispin in Seoul enjoying spring > > <snip> > > _______________________________________________ > Gasification mailing list > > to Send a Message to the list, use the email address > [email protected] > > to UNSUBSCRIBE or Change your List Settings use the web page > > http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org > > for more Gasifiers, News and Information see our web site: > http://gasifiers.bioenergylists.org/ > >
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