This study is to test and compare the performance of small biomass stove no gas stove and the isthmus of the biomass model with isthmus. Without gas, biomass, size, diameter: 13 cm height 4 cm room burned diameter 10 cm height 12 cm. use a flow principle and eucalyptus size diameter 6.5 cm, 1 cm high, as fuel in a gas oven performance test of small biomass by means of boiling. (WBT) and combustion gas, biomass has a small isthmus. 3.1847 cm diameter from performance testing of gas, biomass, small with no gas, biomass, the isthmus, and the model with the isthmus. Equal to 17.73 and 16.31 percent, respectively. From the experimental results showed that the performance of the gas, biomass, small isthmus is performing better than gas, biomass has a small isthmus, because there is no heat loss to air and does not use electrical energy in the combustion process to cause the firing process.Burns, a long and continuous boiling water longer, thus resulting in high efficiency, but on the contrary, the amount of time it takes to make the boiling water will last longer than gas, biomass, using centrifugal fan assisted combustion therefore it can be concluded that the performance of small biomass gas cooker is inverse to the thermal performance. If you want a fast-boiling water must be losing efficiency down.
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