[Stoves] Pellet stoves - risks

Dean Still deankstill at gmail.com
Thu Sep 3 13:28:53 MDT 2015


Hi Frank,

After limited experience in Uganda and China my experience is that it's not
easy to make clean burning recipes for biomass pellets.

Seems like the torrified pellets emit less PM but we need to do more tests.

Best,

Dean

On Thu, Sep 3, 2015 at 8:44 AM, Frank Shields <franke at cruzio.com> wrote:

> Dear Chispin and stovers
>
>
> Of course no mention of the quality of the pellets! In the U.S. The go
> through standard testing and results labeled
> On bags. But pellets are made of all sorts of materials and energy values
> and volatile profiles.   It would seem this would be part of the
> discussion.
> Thanks
> Frank
>
> Sent from my iPhone
>
> On Sep 3, 2015, at 6:13 AM, Crispin Pemberton-Pigott <
> crispinpigott at outlook.com> wrote:
>
> Dear Friends
>
>
>
> There is a broad move around the world to create pelleted fuel from
> biomass and burn it in tighter spaces. This report was noted in the
> Alliance for Green Heat newsletter:
>
>
>
> *Updated on the Mt. Vernon pellet stove recall*
> <http://r20.rs6.net/tn.jsp?f=001d7dcszljjgfEKYA31aaHyRsMRRejQSaDUDJHpy5B3lPW1W0QcteHERbDFukIhEc2-_1cKtvym49J_ai7zvt1WWN26UenG3N6joIskOVraQhcc__S5dpEwVlcw8pbpwWuwRufyvZSstnraBJTXAbr2wOPL-tX7Wypj3swduscC5I1Staun8b2olWMeGwuEsLEKsSA0qsYd2J1B5b7fDXOH7vLn_jPI3y12xty5nULquL9LCJu6LE7P-Ysu5qiL45LFwfyKNL4feu5XOzEawUh0a7X5VAZM8fb7F4K1l1kHGeFIFftvkxNTEEi9J_I05V6LKmiIZSk4GOQXJRAMRf5NDba52L-Wn_9jVkbpqju9Kifq8bMZm_xowV5Qn2NerYbUfu00_a4isbrvL9gktLkSQ==&c=WnPhxOQ3V-ic1ZJ3NBDpcipfRPq-UdIrBKPYwMfkxe-_CRS45fkQ4w==&ch=gnDbpciWOWhz6yV0o8Zdcoli15r_rpgR21xk0iBJKKi_KYRnwLVmTw==>
>
> Last month, we reported on the recall of 2,000 Mt. Vernon E2 pellet
> stoves after about 6 experienced explosions that shattered the glass in the
> front door. No injuries have been reported. The Alliance wrote to HHT
> asking for clarifications about what caused the malfunction and whether the
> stove would be 3rd party tested again for safety. *Click here*
> <http://r20.rs6.net/tn.jsp?f=001d7dcszljjgfEKYA31aaHyRsMRRejQSaDUDJHpy5B3lPW1W0QcteHEfKhE4oT8BuuAHDwJ1L0g7GrKo5I0xEbbDvkpCt65Xds638GUTKpc9WxdvAozGBIprVOl7vL1wQKB10dTQFUofpAQnr3z9i2zwxCfiQA3rCg4PVvKxSMWgMWDhYiC_fJ7rGJlBpUwsdpb9A-KCa9c_WZg3sRbG1GpSOEsBvotEVw3FLKELU68l1aktAt4KqIrr-AbESuj8iSP6u9wdRQU3L5aMshSI5ocFejIUjrSB94PP9Q2h_zrmWcq3brFPbj1VqWZSiFfmDp50WpCw2b2SOvJ-9NqzbOgn8sgdzIHO2tNWqczgkuFI6d7bzwPt4D_g==&c=WnPhxOQ3V-ic1ZJ3NBDpcipfRPq-UdIrBKPYwMfkxe-_CRS45fkQ4w==&ch=gnDbpciWOWhz6yV0o8Zdcoli15r_rpgR21xk0iBJKKi_KYRnwLVmTw==>
> for a copy of the HHT response.
>
>
>
> The drive to create better combustion often means having a staged
> gasification-then-burning type of design. That may be a source of problems.
>
>
>
> I know of at least one instance of a very modern TLUD coal stove explosion
> in Ulaanbaatar when the operator refuelled it with a significant amount of
> lignite (high volatiles) while it was already very hot. This generated a
> huge amount of combustible gas while simultaneously extinguishing the gas
> flame.  Eventually it heated up to the point that the gas ignited and it
> blew flaming fuel out of the top of the stove, around the room.  A public
> education campaign tried to prevent exactly this sort of mis-operation.
>
>
>
> Regards
>
> Crispin
>
>
>
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-- 
Dean Still
Executive Director
Aprovecho Research Center
PO Box 1175
76132 Blue Mountain School Road
Cottage Grove, OR 97424
(541) 767-0287
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