[Stoves] Back into action

[Philip Lloyd]

"The WBT was a successful program to compare stoves and allow the stoves
with the best potential to be picked for further consideration in the real
World. It was only flawed in the test method used."

I could be wrong, but I know of no stove showing best potential by the WBT
that realized that potential in the real world. 

Frank accepts that the test method was flawed.  Some of it, e.g. the
simmering test, was not merely flawed, it was outright unsound.

Using a metal block instead of water in a cooking vessel will probably
overcome the problem of estimating the time to boil, but it removes the test
even further from the real world.

Prof Philip Lloyd
Energy Institute, CPUT
PO Box 1906
Bellville 7535
Tel 021 959 4323
Cell 083 441 5247
PA Nadia 021 959 4330

-----Original Message-----
From: Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of
Frank Shields
Sent: Wednesday, September 6, 2017 5:03 PM
To: Discussion of biomass cooking stoves
Subject: [Stoves] Back into action

Stovers,

The WBT was a successful program to compare stoves and allow the stoves with
the best potential to be picked for further consideration in the real World.
It was only flawed in the test method used. Lets correct these problems and
get the WBT back to central to our many faceted program.  

1) It needs to relate to the fuel planned to be used. I suggest the energy
in the Volatile Fraction to be the total energy released to the secondary.
The Fixed energy to be the maximum  char making capability of the fuel.
Results of percent energy used (if that is at all important?) is based on
the volatile energy fraction and the Percent char produced a percent of the
maximum for that biomass. That will please all three groups; TLUD, Rocket
and Ron : ).


2) We need to have it measured for the many different tasks that the stove
might be used. I suggest developing a Task Cube. This a solid metal
(platinum, aluminum, steel, titanium) of something that will last. Cubed to
exact measurements, Drilled and taped to fit a thermistor to record the
increase in temperature. Place this block in with different foods being
cooked and record the temperature profile. Develop the profile that needs be
obtained for each task. Sell the Task Cubes to labs where they can place
them in boiling water or sit on a hot surface then follow the temperature
profile to determine if the stove will work for that task and when the task
is completed.  

So we go from the actual fuel (well sort of) to the actual task (well sort
of). The program is (or was) already set up and used so should be quick to
get it running again. Purpose it to provide Cecil Cook (and others) with a
list of stoves from an unbiased source and with best chance for success into
the field so they can do the things they do. And provide the opportunity for
every stove designer to get their stove  compared with others.  






Thanks

Frank
Frank Shields
Gabilan Laboratory
Keith Day Company, Inc.
1091 Madison Lane
Salinas, CA  93907
(831) 246-0417 cell
(831) 771-0126 office




franke at cruzio.com




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