For a specific gasification rate of 150 kg/m2-hr and an FCR of 2 kg/hr, the
minimum diameter is 13 cm. Therefore, the required area is 133 cm2. The
stove presented in this report has an annular reactor rather than a circular
one. The smallest area considered for a working design had an innermost
cylinder of 3 in (7.62 cm) and an inner cylinder of 6 in (15.24 cm). The
resulting area is 131 cm2. The 1% difference between these power outputs
would result in only a few more seconds of cook time necessary.
Current trials of the stove design can consistently combust a 4 in layer of
rice husk in 6-12 minutes. Results from one such test are shown in Figure 4.1.
The mass of rice husk burned, assuming a bulk density of 100 kg/m3, is 0.24
kg. Therefore, the resulting fuel consumption rate is 1.18 kg/hr. Dr. Belonio
provides an FCR of 0.62 kg/hr as adequate for cooking in his handbook.
This suggests that the stove performance observed is actually overpowered