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A Hybrid Power Generating System Using Producer Gas And Biodiesel Blend

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2010 Pittsburgh, Pennsylvania, June 20 - June 23, 2010  1008535.(doi:10.13031/2013.29641)
Authors:   Hifjur RAheman
Keywords:   Hybrid power, Jatropha biodiesel, Producer gas, Performance, Emissions Leave the

A hybrid power generating system comprising a down draft gasifier and 5.5 kW diesel engine coupled to a 5 KVA AC generator was evaluated with biodiesel and high speed diesel (HSD) blend (B10) as well as producer gas and B10 in dual fuel mode (B10PG). The producer gas and biodiesel were produced from wood chips and jatropha oil, respectively. The performance and emission parameters of the system such as brake specific fuel consumption (BSFC), brake thermal efficiency (BTE), overall efficiency of the system (OES), CO and CO2 were measured at variable loads (0, 50, 75 and 100% of load corresponding to load at maximum power) maintaining the rated engine speed (1500 rpm). Minimum BSFC and maximum BTE were observed at 100% engine loading and were 269.95 g/kWh, 31.86%; 346.57 g/kWh, 24% and 279.29 g/kWh, 31% for B10, B10PG and HSD, respectively. Reduction in calorific value of B10PG could be the reason for higher BSFC and lower BTE. The maximum OES was found to be 25.49%, 19.18% and 24.43% for B10, B10PG and HSD, respectively. As compared to HSD, CO and CO2 emissions for B10PG were found to be 18% higher and 6% lower, respectively whereas for B10, both these emissions were reduced by 9 and 2%, respectively. The increased CO emission with B10PG was due to less oxygen availability, which led to incomplete combustion. The developed system was found operating satisfactorily with dual fuel mode and on an average 70% of HSD replacement was possible.

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