[Stoves] High mass space heating options Re: Rocket Stove for the PLACE

Tue Oct 18 15:08:55 CDT 2011

Dear Roger

My First Rule is, "Never assume anything."

Nearly everyone in Ulaanbaatar has electricity, enough to have a TV and
lights. It is not that they have an electricity account, they 'make a plan'
with neighbours. The same situation exists in South Africa with sometimes
breathtaking results. See attached.

You can increase the draft by reducing the chimney diameter. The gas flow
rate is then higher and there is less time to be taken out to heat the room.
Using stainless steel sheet for the chimney will reduce losses as well. The
new stove from SeTAR will take advantage of both: it has a 63.5mm diameter
chimney made from SS.

Until you reach about 10 feet per second the draft loss to friction is not
much. Most domestic stoves have chimneys that are far too large to work
properly. If you have less gas at a higher speed in the pipe and on average
it is hotter, you get more draft for the same heat loss.

Regards

Crispin

From: stoves-bounces at lists.bioenergylists.org
[mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of Fireside
Hearth
Sent: October-18-11 1:27 PM
To: stoves at lists.bioenergylists.org
Subject: Re: [Stoves] High mass space heating options Re: Rocket Stove for
the PLACE

Hello Steve, 

         In UlaanBataar Mongolia for one example there are times where
electricity is not available, then you have the off gridder, and my total
paranoia that even here at home we could be without power for long periods
of time. One of our local power generating dams is horribly compromised
structurally, should it go it would send millions of gallons of water
rushing downhill toward Seattle taking out every power translator station in
it's path. This could mean many months before power could be restored in
many area's. This is why I wish to not rely on power at all if possible.
        I have worked out my stove problem by two methods. One was to
"wrap"my flue pipe raising it's internal temperature creating a better draw,
the other was getting more activity from my secondary combustors which in
turn accomplished both a better (cleaner) burn as well as providing a little
more temperature in the flue.

  _____  

Date: Tue, 18 Oct 2011 09:25:28 +0100
From: steve at thetaylorfamily.org.uk
To: stoves at lists.bioenergylists.org
Subject: Re: [Stoves] High mass space heating options Re: Rocket Stove for
the PLACE

On 17 October 2011 22:08, Fireside Hearth <firesidehearthvashon at hotmail.com>
wrote:

Hi Steve.....

            I have tried that, and it does work......but........I'm trying
desperately to stay away from all electric options.  I did find this morning
that my combustor pack was losing heat to it's outer shell and not
developing the temps needed to stay clean and solved this issue which might
also solve the other. What I am wondering is more along the line of chimney
diameter vs temperature. Different diameters have different velocities which
could result in different temp ranges. I am also putting a second section of
pipe around the chimney on top of the roof to raise the temp and this seems
to be helping.

Why? because you don't like using electricity, or you want the ability to
run "off grid" ? 

Steve 

_______________________________________________ Stoves mailing list to Send
a Message to the list, use the email address stoves at lists.bioenergylists.org
to UNSUBSCRIBE or Change your List Settings use the web page
http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists
.org for more Biomass Cooking Stoves, News and Information see our web site:
http://www.bioenergylists.org/

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20111018/55baf856/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Informal Sector Electricity Service.JPG
Type: image/jpeg
Size: 90931 bytes
Desc: not available
URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20111018/55baf856/attachment.jpe>