The combustion properties of Four sets of briquettes (rice husks, sawdust, cattle dung), and blends thereof in the ratio of 2:1 with coal were evaluated in improved stove system. Water Boiling Test (WBT) was carried out using the prepared briquettes and compared with firewood. Sawdust Briquettes and Fire wood boiled water in 8 minutes while briquettes from other materials boiled water between 18-33 minutes. This is an indication that the designed stove performed efficiently with the briquettes and firewood. The chemically bound energy of the briquettes was determined by calometry. Coal briquette had the highest calorific value of 4961.8 cal/g while other briquettes had between 3012.8-4531.2 cal/g. Ele-triaxial compressive machine was used to determine the compressive strength of the briquettes. Briquettes produced from 100% non-blended materials had comparatively weaker strength (92.44kN/m2, 30.13kN/m2, and 45.41kN/m2 for sawdust, rice husk and cow dung respectively). The briquettes produced from blending 70% materials with 30% coal had higher compressive strength of 106.74kN/m2 for sawdust, 73.40kN/m2 for cow dung, and 51.85kN/m2 for rice. Coal briquette had the highest compressive strength of 134.87kN/m2. These are appreciable compressive strengths and are indication of good quality briquettes.
PAPER TITLE :EVALUATION OF COMBUSTION CHARACTERISTICS OF AGRO-WASTES/COAL BRIQUETTES IN IMPROVED STOVE SYSTEM
JOURNAL Of SUSTAINABLE TECHNOLOGY | VOLUME 2 NUMBER 1 2011
- Author(s) : NARON, D.R. and AKPABIO, I.O