Product development using cfd simulation and performance evaluation of energy efficient institutional bio-char rocket stove

Abstract

Globally, biomass accounts for ten percent of energy production, two-thirds of which is used for cooking and heating purposes in developing countries. Environmental degradation and natural resource depletion are also serious issues as a result of cutting trees to serve as fuel wood; biomass will govern household energy of the countries in the near future and increased afforestation, reforestation, and forest management to increase carbon sequestration in forests and woodlands. This study was product development using CFD simulation, evaluate developed prototype of modified rocket stove, the performance of the stove for institutional cooking and evaluate the stove co-product (bio-char production) for soil amendment. The stove design was selected for both the computational fluid dynamic (CFD) simulation, and experimental measurements. ANSYS fluent work bench was used for CFD simulation the wood combustion and pyrolysis of woodchip to form multi-face exhaust holes syngas flow to stove combustion chamber. Gasses start to come out from the pyrolysis chamber through the exhaust outlet after 8 minutes of pyrolysis, and pressurized the gasses come out at this time, it start burn in combustion chamber. After 20 minutes the water boiling was completed, the biochar had 4.634 pH value. At 60 minutes pressurize Syngas was stop and gives low combustion. The char was tested and found to be rich in carbon with a pH of 7.235 and 1.35kg(30.17%)yield when syngas burn up to 60minutes. The results of experiment show that the fuel consumption 8.75kg, and overall thermal efficiency 45.67% of stove and the biochar produced is good for amendment of soil