[Stoves] Pellet stoves - risks

[Frank Shields]

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
> 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 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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