Biodiesel remains an alternative fuel of interest for use in diesel engines. A common characteristic of biodiesel, relative to petroleum diesel, is a lowered heating value (or per mass energy content of the fuel). For same torque engine comparisons, the lower heating value translates into a higher brake specific fuel consumption (amount of fuel consumed per unit of power produced). The efficiency at which fuel energy converts into work energy, however, may remain unchanged. In this experimental study, evaluating nine unique engine operating conditions, the brake fuel conversion efficiency (an assessor of fuel energy to work energy efficiency) remains unchanged between 100% petroleum diesel fuel and 100% biodiesel fuel (palm olein) at all conditions, except for high load conditions. Several parameters may affect the brake fuel conversion efficiency, including heat loss, mixture properties, pumping work, friction, combustion efficiency, and combustion timing. This article describes a study that evaluates how the aforementioned parameters may change with the use of biodiesel and petroleum diesel, and how these parameters may result in differences in the brake fuel conversion efficiency.
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December 2010
Research Papers
Biodiesel Effects on Influencing Parameters of Brake Fuel Conversion Efficiency in a Medium Duty Diesel Engine
Joshua A. Bittle,
Joshua A. Bittle
Texas A&M University
, College Station, TX 77843-3123
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Jesse K. Younger,
Jesse K. Younger
Texas A&M University
, College Station, TX 77843-3123
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Timothy J. Jacobs
Timothy J. Jacobs
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Joshua A. Bittle
Texas A&M University
, College Station, TX 77843-3123
Jesse K. Younger
Texas A&M University
, College Station, TX 77843-3123
Timothy J. Jacobs
J. Eng. Gas Turbines Power. Dec 2010, 132(12): 122801 (10 pages)
Published Online: August 27, 2010
Article history
Received:
November 13, 2009
Revised:
December 9, 2009
Online:
August 27, 2010
Published:
August 27, 2010
Citation
Bittle, J. A., Younger, J. K., and Jacobs, T. J. (August 27, 2010). "Biodiesel Effects on Influencing Parameters of Brake Fuel Conversion Efficiency in a Medium Duty Diesel Engine." ASME. J. Eng. Gas Turbines Power. December 2010; 132(12): 122801. https://doi.org/10.1115/1.4001086
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