The Performance of Clay-based Biomass Briquette Stove with Three Geometry Shape Variations

Biomass briquette stove is a cooking tool that
is still widely used by the people of the interior of South
Sulawesi. Even in urban areas, it is not uncommon to find
their use because of the ease of obtaining briquettes and
its relatively good efficiency. This study aims to
determine the best performance of a biomass stove from
three types of clay material stove shapes in different
configurations of geothermal variations. The three
variations of the geometric shape of the stove are
cylindrical, rectangular and hexagonal using biomass
material from coconut shell charcoal in the shape of a
honeycomb with an inner diameter of 15 mm and an
outer diameter of 65 mm and a height of 45 mm. The
uniqueness of this stove is the addition of a sleeve
diameter of 180mm in the stove's combustion chamber
as heat insulation so that the combustion process in the
combustion chamber can be more perfect. The test
results show that the presence of a flat surface on the
stove wall will accelerate heat loss compared to the
cylindrical surface. This is in line with the results which
show that the highest rate of heat loss occurs in a
rectangular shape, then a six-square shape, and the last
is a cylindrical shape. Furthermore, it can be concluded
that the cylindrical stove is the superior of the two in
terms of flame temperature, ability to boil water and
thermal efficiency of 798°C, 30 liters and 73.66%,
respectively.
Keywords: performance, biomass stove, clay, cylinder,
rectangular, hexagonal