A311 PERFORMANCE STUDIES OF A BIOGAS FUELED DIESEL ENGINE OPERATING IN A DUAL FUEL MODE

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  • Haq M. Z.
    Department of Mechanical Engineering, Bangladesh University of Engineering and Technology
  • Rahman M. H.
    901 Central Workshop, EME, Bangladesh Army, Dhaka Cantonment
  • Bhutto Z. A.
    Adhoc Field Workshop, EME, Bangladesh Army, Dhaka Cantonment

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The present paper reports the experimental and modeling studies of a 4-cylinder, 4-stroke, direct injection diesel engine. Study is carried out for two modes of operations-one with straight diesel fueling and another in dual-fuel mode using natural gas and biogas of two compositions with a fixed amount o pilot diesel injection for the ignition of the charge. Both experiments and simulations are carried out for different engine speeds at different loading conditions. The results obtained from the simulations are in reasonable agreement with the experimental results; however, neglect of detailed combustion in the model resulted in higher rated power estimate of the engine. Lower cylinder gas pressure and higher bulk gas temperatures are obtained in case of fueling by natural gas, and these quantities decrease with increase in the carbon dioxide content of biogas.

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