Experimental Investigations, Regression and Computational, Modeling and Analysis of Efficient and Effective Techniques for Fuel/Energy Conservation in Iron Foundries

摘要

This paper deals with development of efficient and effective techniques for fuel/energy conservation in iron foundries. The authors conducted series of experimental investigations on a self-designed and developed 200kg LDO fired rotary furnace installed in a foundry. Initially the furnace was operated as under existing conditions. the specific fuel consumption was 0.415 liters/kg and energy consumption was 4.110 kwh/kg. The technique of oxygen enrichment and reducing combustion volume was applied. Initially the 6.9% oxygen enrichment of 75% of theoretically required air was done. The specific fuel reduced to 0.260 liters/kg and specific energy to 2.5752 kwh/kg. Further 7.5-8.5% oxygen enrichment of 60-65% of theoretically required air lead to specific fuel consumption of 0.208 liters/kg and specific energy to 2.0403 kwh/kg. This effective technique significantly reduced specific fuel and energy consumption by 53.855% and 53.863% respectively The modeling of oxygen consumption per heat was carried out using mat lab. The average and percentage variations between experimentally investigated and modeled value for 6.9% oxygen enrichment are +0.0549256 and +1.1077304, and for 7.5-8.5% oxygen enrichment are -0.0185 1nd +0.022359% respectively. These variations are within acceptable range of ±5% hence are acceptable. The regression analysis of variability of results has also been done. The average and percentage variations between experimentally investigated and calculated values of fuel consumption for 7.5-8.5% oxygen enrichment are +0.0003717 and -0.14695% respectively.