[Stoves] ventillation

[rajan_jiby at dataone.in]

Dear Crispin,

Comments below.

Regards,

Rajan



>
> Message: 7
> Date: Mon, 10 Oct 2011 00:12:55 -0400
> From: "Crispin Pemberton-Pigott" <crispinpigott at gmail.com>
> To: "'Discussion of biomass cooking stoves'"
> <stoves at lists.bioenergylists.org>
> Subject: Re: [Stoves] High mass space heating options Re: Rocket Stove
> for the PLACE
> Message-ID: <005f01cc8702$e3ed0ef0$abc72cd0$@gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Dear Massive Friends
>
>
>
> There is a strong preference to put mass walls into homes in Mongolia as 
> spare income becomes available. Something like 60% of people who used to 
> live in a ger (yurt) have built permanent structures and many of the small 
> homes have a mass wall in them.
>
>
>
> There is a significant risk with these devices and that is the problem of 
> controlling the air flow through them once the fire dies down. The amount 
> of heat lost up the chimney can be very significant when the wall is hot 
> and there are open holes. It is not possible to close the chimney 
> completely because it is never certain that a fire is completely out so CO 
> would get into the home if the ventilation of the wall is blocked.


Will it be possible to close the air entry into the combustion area ( after 
the fire dies down ), leaving the chimney passage open ?   If possible ( if 
at all it is practicable ) this will maintain a very small amount of vacuum 
( ie. partial vacuum ) inside the fire-chamber, thus preventing any CO or 
combustion gases getting into the home. Of course there may be some minor 
leakage of heat through the chimney.