[Stoves] Pellet stoves - risks

[Crispin Pemberton-Pigott]

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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