[Stoves] lab.testing vs. field testing

[adkarve]

Questions were raised recently about the validity of the laboratory tests on
stoves, because the so called standard conditions differed from those
prevailing in the field. One must however accept the fact that most of the
products  including new varieties of crops, textiles, medicines, cars, etc.
are first tested in the laboratory under a set of standard conditions and
only if they perform satisfactorily under these conditions, they are
released for use under field conditions. It is a standard procedure and
accepted by the scientific and industrial world. It is our general
observation that the field performance of stoves does not differ much from
the laboratory performance, if the recommended practices for using the stove
are adhered to. If the user totally ignores the instructions of using the
devise properly, he would naturally not get the expected response.   For
instance, if you burned wood in a charcoal burning stove, you would
certainly not get the desired performance from it.
Yours
A.D.Karve
----- Original Message -----
From: Kevin Chisholm <kchisholm at ca.inter.net>
To: Discussion of biomass cooking stoves <stoves at listserv.repp.org>;
<rozisjf at club-internet.fr>
Sent: Thursday, February 01, 2007 8:44 AM
Subject: Re: [Stoves] Tom Miles' Highlights from ETHOS 2007



----- Original Message -----
From: "Tom Miles" <tmiles at trmiles.com>


>Jean-Francois,

>You have demonstrated that we need several approaches to stoves and to
>stove
testing and sometimes we have to compromise some technical values for more
usable features.

>I would like to see the laboratory techniques for measuring performance and
emissions become closer to what is experienced in the field so that the
transition from lab to field is smoother. As Dean and others have emphasized
the lab tests are nothing more than development tools, but we need to make
them as close to the actual use as it is practical. Step by step maybe we
can reduce  the differences between them.

Wouldn't you think that Frank Shields is on the right track, with his
proposal to categorize fuels?

Best wishes,

Kevin

Tom


-----Original Message-----
From: stoves-bounces at listserv.repp.org
[mailto:stoves-bounces at listserv.repp.org] On Behalf Of Jean-François Rozis
Sent: Wednesday, January 31, 2007 10:03 AM
To: stoves at listserv.repp.org
Subject: [Stoves] Tom Miles' Highlights from ETHOS 2007

Dear Tom,

thanks to give us some news on ETHOS happening concerning stove testing,
please make effort to definitively give up absolute testing approach, always
now comparing testing methodology in same time, same controlled conditions
(fuel, operator, climate, pots,..)

So, when you speak performance on combustion quality from Philips stove
please don't  say it's the best like that,  it's under specific conditions,
with specific fuel (industrial chips I presume), but not the same quality
than other stoves we can find in developed countries (simply because for
wood combustion we have to let developing the flame at hot temperature
before any thermal transfer, so if you put a cold pot, you cannot reach
those minimal conditions..), but you know all that of course..

always waiting for a common methodology for IAP stove controlling (PM,
CO,...)..

We are just playing with T-LUD stove in Cambodia (thanks Paul and Noelli),
it's funny for me to challenge Philips stove with a totally different
approach (design and way of commercialization), for us the deal is not the
stove itself, it's just a mean to largely commercialize renewable biomass,
the main problem is there, but promising...

to be continued and all the best for everyone..

--
Jean-François Rozis
Tel : 0467643816


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