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This study investigates the operation of a 30 kW gas turbine engine operated on biodiesel. Atomization, vaporization, combustion, and emissions are compared for operation of the gas turbine on biodiesel and, as a reference, diesel fuel distillate #2. The role of liquid properties on fuel preparation and subsequent engine performance, injector operation on the resulting droplet sizes, and fuel vaporization characteristics are examined. Results show that while compositionally simple, biodiesel’s fluid properties result in inferior atomization, longer evaporation times compared to diesel. Theoretical and experimental findings indicate that optimizing the fuel injection process will improve NO x emissions for biodiesel. The minimum emission levels achieved for biodiesel still exceed the minimum attained for diesel. It is apparent that factors in addition to atomization contribute to the generally higher NO x emissions observed for biodiesel. |
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