The quality of liquid smoke and charcoal product yield can be improved by conducting pyrolysis process through indirect heating process. However, a great huge of energy is required to reach the exact operating temperature. In this experiment, slow pyrolysis of coconut shell is performed for liquid smoke and charcoal production using indirect method where the feedstock is just heated in a tube by using LPG as the heat source. The effect of feedstock size and the operating temperature on the liquid smoke and charcoal yields are investigated by varying the coconut shell sizes in the ranges of 1 to 7 cm2, while the operating temperature is expected as low as possible to reduce the energy required. The optimum process conditions for maximizing the two products yields and quality were also identified to meet the user requirement. The various characteristics of liquid smoke obtained under the optimum conditions for maximum yield are identified based on standard test methods. Data from a simple way of charcoal and liquid smoke production during preliminary research of this study indicated that the coconut shell sizes, and the operating temperatures are the crucial parameter during process.
The purpose of this research was to assess the ability of peat as fuels based on improved stove gasification. The stove was designed and fabricated refer to numerous stoves used by resesearchers and used as the appliance for validation. The stove tested was the forced draft types with a battery mini fan-assisted and a mini blower to force the controlled air for gasification requirement. Flame temperature was recorded and displayed using K-type thermocouple and thermometer indicator respectively. The laboratory operating parameter used was the equivalence ratio (ER) in the ranges of 0,2-0,45. Three peat sizes different in diameters were considered to study the effect of ER on the flame temperature as the thermal power indicator of the peat. From the test results, it was found that the flames temperature was in the ranges 600-700 0 C. Peat with moderate diameter sizes (about 3 cm) was acchieved higher flame temperature about 680 0 C with ER was about 0,34.
This paper presents an integrated performance evaluation of in-lab manufacturing own designed prototype biomass fired-stove used coconut shell as feedstock. Two different stoves in terms of air required for combustion supply mode;(1) external air box (EAB), (2) internal air box (IAB) mode were tested and assessed with respect to the following performance indicator such as water time to boil, specific fuel consumption, and thermal efficiency. The stoves tested were the forced draft modified rocket-stove types with a battery mini fan-assisted to induce draft to force the controlled air for combustion requirement into the stoves. Flame temperature wasrecorded and displayed using K-type thermocouple and thermometer indicator respectively. Specific calculated using the water boiling test (WBT 4.2.3) version protocol. Results showed that the internal air box (IAB) mode has higher thermal efficiency (38 %), specific fuel consumption (2.5 kg/h), and flame temperature (500 0C) than external air box (EAB) mode. However, the thermal output of the EAB (2.3 kW) was reached higher compare to IAB mode. The findings were used to improve the current biomass fired-stoves further that usually used for heating and cooking applications in rural communities.
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