Dear Richard
Thanks for the explanation - I seem to be reading messages out of order. I have a hint for people planning to make a stove like this which is to create a combustion chamber with proper enclosed space and secondary air introduction. I was reviewing some downdraft coal stove patents back into the 1890's and all these stoves (side draft, cross draft (which I think the Sedore is) and downdraft: they don't have a combustion chamber. They just have a space into which the flame is dumped. These constructions all work really well when the fire is very large and tent not to work well at all (in terms of combustion efficiency and PM) when they are at lower power. The reason is obvious: the conditions for good combustion no longer exist in the cooler open space. The flames emerge into the open space and chill immediately allowing the hot carbon to grow into particles of smoke. In all cases, then a much smaller combustion chamber is introduced, the burn runs hotter, cleaner, faster and with more turbulence. So if the intention is to have different power levels it is worth the effort to create a flame burning zone and as Dick says, with secondary air provision. The stove is so air tight that it will be easy to create the correct primary and secondary flows and maintain it across a large change in power. Regards Crispin From: Richard Stanley [mailto:[email protected]] Sent: 26 December 2010 15:48 To: Crispin Pemberton-Pigott; Stoves and biofuels network Cc: Frownfelter Greg Subject: Re: 4 pictures for you Crispin, True no real numbers on the SEDORE stove out of Eastern Canada but you have to admit the design is very clever. >From what I can gather, it is front vented & top loaded but in refreshing the fuel from the top door, it of course gets a charge of air from that direction too. He advises to hold the top door open a bit to let a draft build up in the flue though. In the main, it looks like an enclosed side draft device with a vertical baffle separating the hopper from the combustion chamber and flue. I had a friend in Ashland by the name of Paul Runquist, who as way ahead of his time on the same idea but who created a very modern looking design. He had also incorporated a bread oven into the flue as well... Intersting idea as it seems to support the growing consensus that you burn only what you need at the moment, replenishing it continuously, whether wood, pellets or briquettes, whether bottom loaded , side fed or even top loaded (albeit with a downdraft into an adjacent combustion chamber). Cheers, Richard PS Greg, pls pass on to Paul.. On Dec 24, 2010, at 9:10 AM, Crispin Pemberton-Pigott wrote: ===================== Dear Richard Thanks for the forward. I read the stove site and as often is the case, it contains quite a number of errors of understanding about why and what to do with chimneys and creosote. Oh well. Can't fix everything. It sounds from the description that it is either a side draft or downdraft device - it that true? From the refuelling and corn burning info that it is not an updraft fire. But no photos provided to show. Does Harold explain what he built? There is little to go on. Happy hols everyone. Crispin in Waterloo where it is a really warm -7 C From: Richard Stanley [mailto:[email protected]] Sent: 24 December 2010 11:51 To: [email protected]; Oblak Rok; Vuthisa; Robert Williams Subject: Fwd: 4 pictures for you Merrychristmass all. You gotta read this ultimately from your turf crispin Richard Sent from my iPhone Begin forwarded message: From: Harold Westrich <[email protected]> Date: December 22, 2010 11:13:01 AM PST To: Richard Stanley <[email protected]> Subject: Re: 4 pictures for you Hey Richard, I felt bad about burning all of these logs for nothing. It seems that I can find only one similar design on the market now and it boasts many advantages to other furnaces. I hope you have some time because this explanation is a long one. description of the stove below will give you a good footing into the ideas that are in my stove. If you click on the link below and read 1-18 it describes the advantages of the stove I designed. FYI; I found this stove AFTER designing mine and it seems to be the only one of it's kind; however, my stove does have a few features that this one does not. http://www.sedorestoves.com/easterncanadaburningnew.html The sedor stove prevents heat from entering the flue; my stove encourages heat to go up the flue becuase the flue IS the heat exchanger. My stove must have a clean flue in order to exchange heat efficiently over time. Although the design prevents excessive creasote buildup, I have installed a chimny scraping device that scrapes the entire chimny by turning a bolt head that is welded to the end inside the flue. Just a few turns with a wrench scrapes most buildup form the inside of the flue. I have not added the heat jacket yet but when I do the heat from the outside will be drawn up the flue to help heat the house and prevent a cool flue. I think all wood stoves should be outside to prevent any smoke smell inside a house. (although I love the smell of smoke and soot) Feel free to share this information, Pictures and design at will, with our without my name. I have to go now, I am putting a larger wood box and building the heat jacket today. Although it is not finished, I have heated our house several times. The performance is good, but I built the thing with the intention of only heating the two bedrooms. It heats them well but the rest of the house only gets a few degrees above outside temperatures. I will give some results after making the larger wood hopper and adding the air jacket. Later Harold On Tue, Dec 21, 2010 at 11:18 PM, Richard Stanley <[email protected]> wrote: Harold, Wow: I think you are on to something here. Few here have ever considered using them for domestic heating here in the states, other than tossing them into a fireplace. I've got a few questions but keep in mind its all your on idea here so I wont go blasting it all over the internet without your name on it and your permission to do so first...Are the briquettes being fed in on the vertical ? How do you keep them from burning back up the feed tube--or did you just seal it off to keep fresh air from feeding in the inlet end ? Merry Xmass. This stuff becomes a religion all by itself eh ? Richard PS., We ( wife and mother in law and myself) are going to be coming back up thru Oakland on about the 5th of January, enroute back to Ashland from LA where we are planning to spend a few days with the grandkids. I wonder if it might be possible to spend a few minutes with you then? On Dec 21, 2010, at 8:27 PM, Harold Westrich wrote: > Hello Richard, > > I have not been writing much but I have been busy. Have made no > physical progress on the press but have nearly completed my wood > burning furnace. Or should I say briquette burning furnace. The pics > show a briquette furnace with a 15 foot flue/Heat exchanger (don't > worry the flue is one solid piece of stainless, no chance of cracks > letting CO in the house) and the Briquette holder that lets the > briquettes self feed into the air steam. > > Works good. Is only designed to heat two bedrooms but can make them > toasty warm with about six feet of briquette. > > Later > Harold > > > You have been sent 4 pictures. > > > DSC02225.JPG > DSC02226.JPG > DSC02223.JPG > DSC02222.JPG > > These pictures were sent with Picasa, from Google. > Try it out here: http://picasa.google.com/
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