BioEnergy Lists: Improved Biomass Cooking Stoves

From verhaarp at cqu.edu.au Mon Dec 2 02:27:30 1996
From: verhaarp at cqu.edu.au (Peter Verhaart)
Date: Tue Aug 31 21:35:02 2004
Subject: plant oil as stove fuel
Message-ID: <1.5.4.32.19961202062400.0068c50c@cqu.edu.au>

To Claus Braunbeck
>From Piet Verhaart

At 09:20 25/11/96 +0200, you wrote:
>I learned from Ron Larson that you discussed about kerosene burner as
>replacement for wood stoves. Actually, we are thinking to start a
>project about using plant oil for stoves. The idear is to develop a
>burner which uses the plant oil without any additive and to replace
>charcoal, wood stoves or kerosene burners for cooking. Is there any
>expiriences so far on what oil to use or is there already a burner
>developed ? Thank you for your comments and information.
>
>Claus Braunbeck
>
>_______________________________________________________________________________
>Claus Martin Braunbeck
>
>Institute for Agriculture Engineering in the Tropics and Subtropics
>
>Hohenheim University Garbenstr. 9 70593 Stuttgart Germany
>Phone: 0711 / 459 2840 Fax: 0711 / 459 3298
>
>E-mail: BRAUNBECK@495-simon.agrartech.uni-hohenheim.de
>*******************************************************************************
>

Dear Claus,
You might look at records of experiments to make cookstoves that
burn Diesel fuel. Vegetable oils and diesel fuel have in common that they
cannot vaporise at ambient pressure without decomposing. That is why diesel
fuel is atomised (sprayed) into the cylinder. Kerosene was, at the onset,
specially made for wick lanps e.g. the fuel had to vaporise completely
without any solid remains. The same conditions have to be met in jet engines.
I do remember reading about (and not enquiring into) a lamp that used
'Patentolie' (in Dutch), rapeseed oil, which had some kind of pump, at least
that is what I understood.
What might work is a shallow unglazed earthenware dish, which could be
ignited at its edge while fuel is supplied as needed through a gravity fed
pipe. I am sure the dish will have to be cleaned from sticky carbonaceous
deposits from time to time, possibly from meal to meal.

Do let me know how you get on! Also curious as to Tom's comment.

Keep cooking
Piet Verhaart
Peter Verhaart 6 McDonald St Gracemere Q 4702 Australia
Phone: +61 79 331761 Fax: +61 79 331761 or 332112
E-mail: verhaarp@janus.cqu.edu.au

 

 

From mheat at mha-net.org Mon Dec 2 08:00:49 1996
From: mheat at mha-net.org (Norbert Senf)
Date: Tue Aug 31 21:35:02 2004
Subject: high performance "Helen" & "Vaagner" cook stoves
Message-ID: <199612021258.HAA17765@nic.ott.hookup.net>

>Date: Fri, 29 Nov 1996 19:20:09 -0700 (MST)
>From: Jorg Ostrowski <ash@freenet.calgary.ab.ca>
>To: Norbert Senf <mheat@mha-net.org>
>Cc: ash@freenet.calgary.ab.ca
>Subject: high performance "Helen" & "Vaagner" cook stoves
>Organization: Calgary Free-Net
>
>
>Norbert: The above-mentioned appliances are NOT masonry. Thank you for
>your quick response. I found your information useful and have downloaded
>it for further reading.
>
>The DOE report"DOE/EE/15425-H1, entitled: "Biomass Energy" of June 23,
>1993 I got free-of-charge from Glen Elis (202) 586-1507.I found it very
>interesting and would love to get one of these stoves into our project. If
>you are talking to Glen, ask him for an updated phone/fax number for
>Larry Dobson. He has moved and I do not have his current numbers.
>Have a wonderful day. Jorg
>
>
>
----------------------------------------------------------
Norbert Senf email: mheat@mha-net.org
Masonry Stove Builders website: www.mha-net.org
RR 5 Shawville fax: 819.647.5092
Quebec J0X 2Y0

 

 

From 73002.1213 at compuserve.com Sat Dec 7 09:41:34 1996
From: 73002.1213 at compuserve.com (Tom Reed)
Date: Tue Aug 31 21:35:03 2004
Subject: GAS-L: Paul Wendelbo Stove test in Denmark (fwd)
Message-ID: <961207143734_73002.1213_FHM32-9@CompuServe.COM>

Nitin:

I am certainly hoping to convert you from NETPAL status to personhood. Love to
hear about your trip.

I made several phone calls to Norway, but never contacted Wendelbro. Would love
to find him. I have an address: Kampala, Box 23039, Uganda; 256 4122 1086.
There was a rumor that he based his stratified downdraft on a Norwegian army
stove. Ours evolved from the conventional downdraft gasifier of WW II.

Tom Reed

 

 

From 73002.1213 at compuserve.com Wed Dec 11 21:27:30 1996
From: 73002.1213 at compuserve.com (Thomas Reed)
Date: Tue Aug 31 21:35:03 2004
Subject: More "J" stove
Message-ID: <961212022248_73002.1213_FHM54-1@CompuServe.COM>

Stovers all:

(This message was delayed 2 weeks by the difficulty of installing Compuserve
3.0.1 arghhh!)

I am finally back at my desktop and just read a month old message from Kirk
Smith about the "cat piss" stove. I would very much like to see a picture or
have a description to see if it is Piet Verhart's J stove principle. When is
E-mail going to make it easy to send files (like Compuserve does so easily?)

I saw another similar stove at Grover's lab at IIT Delhi. A metal cylinder 45
cm in diameter and about 60 cm tall had a central tube 10 cm in diameter,
perforated near the bottom. Surrounding this was a cone, narrow end at the
bottom, extending 30 cm up the outer walls. The cone only was filled with
biomass and lit on top, burning initially in the inverted downdraft mode with
flames above the mass. As it approached the bottom the central tube was heated
and suddenly the central tube took over the draft and drew air down through the
burning mass. At this point the chamber could be filled with biomass and would
gasify in the conventional (J stove type) downdraft mode. One would need to
arrange a mixer and burner on top of the 4 inch tube to have a nice blue flame
stove. I'd like to try it some time.

I hope we have Grover on this net. He was just getting up and running on the
Internet two weeks ago when I saw him. I would like to have his description.

Opinions?

TOM REED

 

 

From verhaarp at janus.cqu.edu.au Thu Dec 12 07:51:56 1996
From: verhaarp at janus.cqu.edu.au (Peter Verhaart)
Date: Tue Aug 31 21:35:03 2004
Subject: More "J" stove
Message-ID: <1.5.4.32.19961212114859.006763c8@janus.cqu.edu.au>

>From Piet Verhaart
To Tom Reed, an opinion.

Dear Tom.
I was just saying (by E-mail) to Etienne that it was very quiet on the
Woodstove Front.
Seriously now.

At 21:22 11/12/96 EST, you wrote:

>I saw another similar stove at Grover's lab at IIT Delhi. A metal cylinder 45
>cm in diameter and about 60 cm tall had a central tube 10 cm in diameter,
>perforated near the bottom. Surrounding this was a cone, narrow end at the
>bottom, extending 30 cm up the outer walls. The cone only was filled with
>biomass and lit on top, burning initially in the inverted downdraft mode with
>flames above the mass. As it approached the bottom the central tube was heated
>and suddenly the central tube took over the draft and drew air down through the
>burning mass. At this point the chamber could be filled with biomass and would
>gasify in the conventional (J stove type) downdraft mode. One would need to
>arrange a mixer and burner on top of the 4 inch tube to have a nice blue flame
>stove. I'd like to try it some time.

Is the 100 mm riser pipe also 60 cm tall, or more?
So a little fuel is arranged around the bottom end of the central riser
pipe and fired. As the pipe heats up draft builds up and at a certain
instant air is drawn downward through the burning fuel. When fresh fuel is
added gas is produced which can be ignited at the top of the riser pipe.
That was the initial idea for building the Eindhoven downdraft stove. After
starting downdraft combustion of a thin layer of fuel we could dump a larger
amount of fuel in the bowl. Initially gas would be generated but the
downward velocity of the air through the fuel was insufficient to confine
the combustion zone on top of the grate. Flames crept upward and spoiled the
gasification process. This was using a 1 m tall riser pipe, so if Grover
could maintain stationary gasification with a 60 cm tall riser pipe he must
have learned an equivalent of the local rope trick.
Eager for details am I.

Can you receive attached files with your Compuserve? Do you have Kodak
Picture Postcard Software? If yes to both, I can send you pictures, of
stoves for instance.

With the Seasons Greetings,

Piet Verhaart

 

>
>I hope we have Grover on this net. He was just getting up and running on the
>Internet two weeks ago when I saw him. I would like to have his
description.
>
>Opinions?
>
>TOM REED
>
>
Peter Verhaart 6 McDonald St Gracemere Q 4702 Australia
Phone: +61 79 331761 Fax: +61 79 331761 or 332112
E-mail: verhaarp@janus.cqu.edu.au

 

 

From verhaarp at janus.cqu.edu.au Tue Dec 17 07:14:12 1996
From: verhaarp at janus.cqu.edu.au (Peter Verhaart)
Date: Tue Aug 31 21:35:03 2004
Subject: Do we cook with wind?
Message-ID: <1.5.4.32.19961217111109.0067eff8@janus.cqu.edu.au>

Dear Stovers,
One thing I never saw mentioned is how much wind (Beaufort Number)
should we assume to plague our cooking clients in the not-so-fortunate
countries of the world?
My own experience tells me that none of our Industrialised World gas burners
perform very well under wind conditions. When barbecueing on our outdoor,
(made in Taiwan, proudly designed in Australia), propane fueled barbecue I
usually have to keep up a lively flow of invective to keep the wind at bay
and rig up the cover as well to act as a windbreak.
If we all agree that we only design stoves for wind free conditions, I will
have to build a screened off area to test my stoves.
Today I flattered Grover, I mean Mr (I presume) Grover by imitating. I cut
an old an leaky pressure tank (from the bore pump) in half and welded an
upright pipe (65 mm internal diameter) to one half. The pipe is one meter
tall. The good idea of the stove is the automatic preheating of the riser
pipe. Since I don't want to stink up my precious shed I will either have to
wait for a windstill day or build an enclosure. Life is a constant struggle.
Best wishes for a moderately cholesterol free X Mass and a very happy New Year.
Piet Verhaart
Peter Verhaart 6 McDonald St Gracemere Q 4702 Australia
Phone: +61 79 331761 Fax: +61 79 331761 or 332112
E-mail: verhaarp@janus.cqu.edu.au

 

 

From zach at crest.org Thu Dec 19 18:53:36 1996
From: zach at crest.org (Zach Nobel)
Date: Tue Aug 31 21:35:03 2004
Subject: test message to test new list server software
Message-ID: <Pine.GSO.3.95.961219185133.656N-100000@solstice>

 

test

ZAch

_________
Zachariah Nobel, Assistant Manager for Internet Services
Center for Renewable Energy and Sustainable Technology (CREST)
zach@crest.org