[Stoves] Major stove-test proposal

Sun Apr 21 12:15:33 CDT 2013

Dear Paul

Further to this I can report that there is significant progress on
systematising this proposal into the form of a Standard with three sections,
or three titles that biomass combusting devices naturally fall into. In fact
that could even be refined further by saying that there are three testing
approaches that provide comparisons contained in one methodology.

They are: devices that heat water only (which is so common that they can be
specifically tuned for that alone); devices that are used for cooking (they
can be controlled enough to give a cook a good cooking experience with
enough power and controllability); and comparative testing where an absolute
measure is not required, but which tests one stove against another doing
exactly the same thing (usually for determining the relative performance of
a locally or culturally relevant task). 

The measurements are based on a determination of what constitutes a decent
and acceptable cooking experience, which of course varies from region to
region. Working back from that, it is possible to set certain targets for
performance that are scientifically rooted and defined.

The definitions required are being compiled at this time. A few people have
been asked for input and then I will circulate it further. It is very much
open for discussion. The Stove Testing Toolbox is a set of agreed methods
with their attendant definitions and metrics, each of which exists
independently and is valid on its own. At the moment there are two 'tools'
that seem to be well defined enough to work well.

One is for determining the heat transfer efficiency of a hot stove at high
power and the other is for determining the average heat transfer efficiency
over a long burn at one or more power levels including ignition. The latter
captures the influence of the thermal mass of a heavy stove - something
building into the Chinese National Standard at the moment though it does so
in a manner that has not been examined in much detail. Emissions are easily
added to the TET numbers based on the mass emitted per net MJ in the pot.
Determining the MJ in the pot of a wok or for frying has been a problem.
This has been addressed.

The thermal efficiency tests (TET) are similar to the BS, Indian and SeTAR
tests meaning they track the heat transferred including the Cp of the pot.

More details will follow when the documentation is organised.

Regards

Crispin

This was not cross-posted to the biochar list

+++++++

Stovers and biochar folks.

The message below and attachment were sent but not distributed (because of
too many other recipients).

That explains why there was so little discussion!!  

I consider this document to be highly important.    So here it is, a month
late but still to be read.

Paul S. Anderson, PhD  aka "Dr TLUD"
Email:  psanders at ilstu.edu <mailto:psanders at ilstu.edu>    Skype: paultlud
Phone: +1-309-452-7072
Website:  www.drtlud.com <http://www.drtlud.com> 

-------- Original Message -------- 

Subject: 

Major stove-test proposal

Date: 

Thu, 21 Mar 2013 18:41:54 -0500

From: 

Paul Anderson  <mailto:psanders at ilstu.edu> <psanders at ilstu.edu>

To: 

Discussion of biomass cooking stoves
<mailto:stoves at lists.bioenergylists.org> <stoves at lists.bioenergylists.org>,
<mailto:biochar at yahoogroups.com> "biochar at yahoogroups.com"
<mailto:biochar at yahoogroups.com> <biochar at yahoogroups.com>, Hugh McLaughlin
<mailto:wastemin1 at verizon.net> <wastemin1 at verizon.net>, Bob Fairchild
<mailto:solarbobky at yahoo.com> <solarbobky at yahoo.com>, Noeli Anderson
<mailto:nvanderson at yahoo.com> <nvanderson at yahoo.com>, Doc Anderson
<mailto:psanders at ilstu.edu> <psanders at ilstu.edu>, Ranyee Chiang
<mailto:rchiang at cleancookstoves.org> <rchiang at cleancookstoves.org>

Dear All,

Here at the GACC Forum, a truly major proposal about adjustments of 
stove-testing method has been made.   It is just beginning to reach 
those who should be involved.   Feel free to forward the attached 
document to others.   And I understand that some additional proposals 
are being formulated, but I have no details on them.

I will send further comments eventually, but you can start 
discussions.   The conference is very productive.  Including some truly 
meaningful TLUD progress!!!

Paul

-- 
Paul S. Anderson, PhD  aka "Dr TLUD"
Email:  psanders at ilstu.edu <mailto:psanders at ilstu.edu>    Skype: paultlud
Phone: +1-309-452-7072
Website:  www.drtlud.com <http://www.drtlud.com> 

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