DESIGN, DEVELOPMENT AND PERFORMANCE EVALUATION OF DOMESTIC COOKSTOVE SUITABLE FOR DIFFERENT SOLID BIOMASS FUEL 1969
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Date
2014-12
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JAU, JUNAGADH
Abstract
Biomass has been a major source of households' energy in India. The share of biomass varies from nearly a third (36%) to a half (46%) of total energy in India. Biomass energy constitutes wood fiiels, crop residues and animal dung. The cheapest biomass sources are the wood and agricultural residues which are easily available. Wood fuels contribute 56 percent of total biomass energy in India. Traditional biomass cookstoves have low thermal efficiency and high flue gas emission compared to improved cookstoves. The efficient use of fuel wood is much more eco-friendly than the use of efficient and conventional fuels like kerosene and liquefied petroleum gas (LPG). In order to use biomass in a thermal conversion mode, appropriate designs of biomass stoves are needed. Improved biomass cookstoves are efficient combustion devices which has great potential to minimize emission and yield better fiiel efficiency. An improved biomass cookstove for a family of five to six members was designed, developed and tested as per BIS 13152 (Part 1): 2013 at Thermo-Chemical Conversion Department (TCC) SPRERI, V. V. Nagar, Anand, Gujarat. Combustion chamber of the cookstove was made of three cylinders in which inner shell made with the internal diameter, thickness and height 145, 1.5 and 305 mm respectively. The cook stove was air insulated with the thickness of 20 mm. The middle shell was provided with diameter, thickness and height 185, 1.5 and 260 mm respectively. The outer shell was provided with diameter, thickness and height 225, 2 and 305 mm which contains Insulyte-7 as an insulating material. Two extended pipes each having diameter 38 mm are provided from the sides near the bottom of cookstove. A fiiel opening of 100 x 100 mm from the side at height 80 mm from bottom was provided for continuous feeding. Four wood fuel materials viz. Babool wood {Acacia nilotica\ Mango wood {Mangifera Indica), Nilgiri wood {Eucalyptus) and Palmarosa grass {Cymbopogon martini) briquette were selected and characterized for proximate analysis and calorific value. The calorific value of babool wood, mango wood, nilgiri wood and Palmarosa grass briquette was found to be 4290, 4250, 3987 and 4226 Kcal respectively. Performance of the cookstove was evaluated for different tests viz. fuel consumption rate (PGR), thermal efficiency test (WBT), power output, emission test (CO & CO2), quenching test for grate, surface temperature and stability test. The results of these obtained for different tests revealed that, the PGR was 1.5, 1.57, 1.66 and 1.115 kg/h, thermal
efficiency was 28.07, 27.94.27 04 anH 97 na .. kW for babool wood, mango wood nilgiri wood and^all 2.1,2.16, 2.08 and 1.48 peak CO emission from 'r T CO2 was 10700, 16100, 12600 and 16000 ppm for bahnni J and palmarosa grass briquette respectively The CO/CO was found to be 0.015, 0.011. 0.028 and 0.016 i e S^it?iL° th' ^ .'^'P^^tive feedstocks The cast iron component (grate) no any crack or deformib^V™'^ cookstove was found stable against overturning h . ?" quenching after test The cookstoveisevalutedas fliql/? durmg stability test. The total cost of the
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RENEWABLE ENEGY AND RURAL ENGINEERING