Dear Crispin,
Comments below.
Regards,
Rajan
Message: 7
Date: Mon, 10 Oct 2011 00:12:55 -0400
From: "Crispin Pemberton-Pigott" <[email protected]>
To: "'Discussion of biomass cooking stoves'"
<[email protected]>
Subject: Re: [Stoves] High mass space heating options Re: Rocket Stove
for the PLACE
Message-ID: <[email protected]>
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.
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