improved biomass cooking stove for household use - (PDF, 101 mb ...

were widely distributed throughout the country, a stove collecting team was
sent out to various locations to collect the stove samples and bring them
back to the laboratory for testing.
C. INVESTIGATION OF EXISTING STOVE PERFORMANCE
Efficiencies of all collected stoves were evaluated using the same
standard testing conditions which is described in the next chapter. All
calculations based on data received from the stove testing were done on
an IBM main frame computer at Kasetsart University. The results were
analyzed closely for relevant relationships between the efficiency and the
physical structure of the stoves. This information was critical for stove
development.
D. ANALYSES OF STOVE PHYSICAL FACTORS
The stoves physical factors (such as section for air inlet, area for
exhaust gas outlet, combustion chamber, grate, stove body, etc.) were
analyzed. If one of these factors was changed so was the geometry of the
stove. Such an effect was classified as an internal variable. There was
another group of variables that had no effect on the geometry of the stove
when their values changed (wind velocity, humidity, air temperature, pot
size, etc.). This group made up the external variables. The effects of
both the internal and external variables on the performance of stoves were
studied. The understanding of their effects on the stove performance
would be crucial in designing stoves with high efficiency.
E. DEVELOPMENT OF IMPROVED PROTOTYPE
When the order of most important variables chat affected the efficiency
of the stove was determined from the test analysis, design of high
efficiency stoves corresponding to the prominent variables was then
accomplished. Technical drawings of thu stove prototype were made.
After achieving the dusign of the stove prototype, the next step
involved the selection of suitable quality stove materials, and, finally,
construction of the stove prototype. Stove assembly closely followed the
guidelines of the technical drawing.
F. TESTING OF PROTOTYPE AND REMODIFICATION
The finished stove sample was then subjected to the same efficiency
tests. The results were compared with the existing stoves. This step
might be carried out several times to assure that the developed stoves had
reliable performance and high efficiency.
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