Combustion of Methanol in an Automotive Gas Turbine
Analytical and experimental studies were carried out to assess the effects of methanol as fuel for the GT-225 experimental passenger-car gas-turbine engine. The thermodynamic analyses indicated that the engine performance with methanol would not be changed significantly from that observed with kerosene. After the engine fuel handling system was suitably modified for methanol, dynamometer engine testing confirmed that the engine performed as well on methanol as on kerosene. Using a conventional diffusion flame combustor, oxides of nitrogen emissions were reduced by about 70% for all conditions. Carbon monoxide emissions were reduced by about 25% over the normal engine operating range, but were increased by up to 165% at high engine loads when using methanol. The emissions of hydrocarbons and aldehydes were low for both fuels, but methanol operation produced somewhat more of both. Tests of the engine installed in a chassis rig in the chassis dynamometer and operated on the 1975 Federal Test Procedure Emission Schedule and Highway Fuel Economy Schedule confirmed that the energy consumption of the vehicle operating on methanol was about the same as with kerosene. At low mileage, the vehicle easily passed the 1978 Federal emission standards for HC and CO (0.25 g/km and 2.1 g/km) with either fuel, and also passed the 1977 California standard for NOx (0.93 g/km) with methanol. No attempt was made to determine emission deterioration factors. The driveability with methanol was at least as good as with kerosene.
KeywordsFuel Economy Fuel Flow Turbine Inlet Temperature Hydrocarbon Emission Gasifier Speed
Unable to display preview. Download preview PDF.
- 4.R. C. Farmer, “Methanol-A New Fuel Source?”, Gas Turb. Int. 16, 3, 38–40, 1975.Google Scholar
- 5.C. W. LaPointe and W. L. Schultz, “Measurement of Nitric Oxide Formation Within a Multi-Fueled Turbine Combustor,” Emissions from Continuous Combustion Systems, Plenum, New York, 1972, 211–242.Google Scholar
- 6.C. T. Bowman, “A Shock Tube Investigation of the High-Temperature Oxidation of Methanol,” presented at the Fall Meeting of the Eastern Section of The Combustion Institute, Silver Springs, MD, November 1974.Google Scholar