Development And Experimental Performance Evaluation Of Multi Purpose Stove Fueled By Bio-Briquette Made Of Coffee Husk As A Prime Feedstock

Abstract

In Ethiopia, Traditional Single Stoves Using Charcoal, Sawdust, Agricultural Residues, And Firewood As Fuel Sources Have Low Energy Efficiency And Are Becoming Costly, While Coffee Husk Waste Has Potential As A Clean Energy Source For Cooking And Baking When Converted To Bio Briquettes. This Study Aimed To Develop A Multipurpose Biomass Stove Using Ignitable Bio Briquettes Made From Coffee Husk And Cornstarch Binder. The Dimensions Of The Fabricated Stove Were 85cm In Height, 64cm In Width, And Had A Length Of 64cm, Incorporating A Mitad, Detachable Cooking Place, And Baking Chamber. The Performance Of The Stove Was Evaluated Through Various Tests, Including Water Boiling, Control Cooking, And Baking Tests, Using Sawdust And Bio-Briquettes As Fuel. The Bio-Briquettes Produced Had A Moisture Content Of 7.18%, Volatile Matter Of 28.6%, Fixed Carbon Content Of 50.34%, And Ash Content Of 13.87%, With A Higher Heating Value Of 6108.99 Cal/G. The Performance Of A Multipurpose Stove Using Charcoal For Water Boiling Tests And Bio-Briquettes For Baking Bread And Boiling Water Was Also Evaluated. The Stove Achieved Thermal Efficiencies Of 25% And 41% For Cold Start And Hot Start, Respectively. The Baking Chamber Showed Thermal Efficiencies Of 40% And 42% For Cold Start And Hot Start, Respectively, During Water Boiling Tests. The Specific Fuel Consumption For The Control Cooking Test Was 87g Of Briquettes Per Kg Of Food Cooked, And The Time To Bake Was 14 Minutes. The Study Also Evaluated The Performance Of The Multipurpose Stove Mitad For Baking Injera, And The Multipurpose Stove Mitad Reached The Desired Temperature Of 180??C Within An Average Duration Of 7.5 Minutes, Which Is Significantly Faster Than Traditional Three-Stone Stoves. The Mitad Demonstrated The Lowest Fuel Consumption Per Injera Baked At 383.88g/Kg, Showing Superior Efficiency Over Other Stoves. Its Overall Performance In Baking 10 Injera Was 24.86% Efficient, With 15.21% Exergy Efficiency Via Direct Calculation. In Summary, The Multipurpose Stove And Bio-Briquettes Provide Cost-Effective, Eco-Friendly Cooking And Baking, With The Mitad Enabling Efficient, Even Injera Baking.