FW: Jatropha oil as household energy (forwarding Stumpf)

["Ron Larson" <ronallarson@qwest.net>]

Stovers -  the following just in from Elmar Stumpf on his stove for oils.

Elmar -  Thank you for this additional information you have supplied below.
I hope you will go (if you haven't already) to "List-Subscribe:
<mailto:stoves-subscribe@crest.org>" to join the "stoves" list.  Your
joining (if not already there) will facilitate discussion.

I have a few questions to start you kind offer to discuss this stove
further:

1.  Can you give an estimated cost for the stove now (and in the future, if
likely to be different).

2.  What are the principal things you learned about seed oils that changed
the stove design?  Did tubes have be longer, thinner, hotter, etc?

3.  Can one modify a kerosene stove oneself?

4.  Have you any comment on using a gravity feed mechanism for the oil
rather than a pumping mechanism (as I reported was being done by Grant
Ballard-Tremeer)?

5.  Any detailed testing yet on pollution emissions and efficiency?  Any
comparisons with wood-burning stoves?

6.  How much cost difference for a typical meal in the locations you have
been testing?

7.  What costs have you found for seed oils in different locations (US cents
per liter?)

8.  We have been talking a good bit about gel alcohols as a stove approach.
Any comparisons or thoughts on that alternative as being better or worse
than seed oils?

9.  How does the economics of other attributes of the native species fit in
(use for soil preservation, nitrogenation, firewood benefits, left over
economic value of the seed cake, etc)?

10.  Any more detail on first results from your village tests?

11.  Any comparisons to solar cookers (another upcoming GTZ emphasis)?

12.   Please add anything else important I left out.

Thanks in advance.  We all look forward to hearing more.

Ron

-----Original Message-----
From: Elmar Stumpf: stumpf@ats.uni-hohenheim.de
[mailto:Stumpf@495-simon.ats.uni-hohenheim.de]
Sent: Wednesday, September 18, 2002 9:39 AM
To: ronallarson@qwest.net
Subject: Re: Jatropha oil as household energy (forwarding Henning)


Dear Stovers:

I am very happy to read about our stove on the mailing list. I was out of
office some days but would like to give a short comment on the plant oil
stove.

Since the time Dr. Karve visited our institute we were able to further
optimize our stove. We are now pretty much concluding the technical design
of the stove and are able to burn divers liquid plant oils in our cooking
stove - we have tested around 8 so far and they all work very good.

Right now, we are running long term tests at our test bench as well as a
first practical test in Guatemala. In March this year we tested our stove
in the Philippines with very promising results. Since the functioning as
well as the utilization of the plant oil stove is the same as for the
pressure kerosene stoves, the users had no acceptance problems with this
new technology. We also did a financial analysis comparing the plant oils
as fuel to the other known cooking technologies. We found out that
utilizing coconut oil is the cheapest fuel regarding running costs (if we
put a financial value also on the collected wood).

I would be very happy to discuss the possibilities of this technology
within the stovers-forum.

Dr. Karve: thank you very much for mentioning our stove. That was
really a pitty for me not being able to attend the conference in Pune.

So far for today,
Elmar Stumpf

von:
Dipl.-Ing. Elmar Stumpf, M.Sc./Univ. of Wisc.-Madison
Institute for Agricultural Engineering in the Tropics and Subtropics
Hohenheim University (495)
Garbenstr. 9, 70599 Stuttgart, Germany
Tel.: +49 (0)711 - 459 - 2840
Fax:  +49 (0)711 - 459 - 3298
e-mail: stumpf@ats.uni-hohenheim.de




-
Stoves List Archives and Website:
http://www.crest.org/discussion/stoves/200209/
http://crest.org/discussiongroups/resources/stoves/
>
Stoves List Moderators:
Ron Larson, ronallarson@qwest.net
Elsen L. Karstad, elk@wananchi.com www.chardust.com

Other Biomass Stoves Events and Information:
http://www.crest.org/articles/static/1/1010424940_7.html Bioenergy
http://www.crest.org/articles/static/1/1011975339_7.html Gasification
http://www.crest.org/articles/static/1/1011975672_7.html Carbon

List-Post: <mailto:stoves@crest.org>
List-Help: <mailto:stoves-help@crest.org>
List-Unsubscribe: <mailto:stoves-unsubscribe@crest.org>
List-Subscribe: <mailto:stoves-subscribe@crest.org>
>
For information about CHAMBERS STOVES
>http://www.repp.org/discussiongroups/resources/stoves/Chambers/Chambers.htm