Performance and emissions of a gas turbine engine using ox tallow ethyl-ester blended with kerosene

The performance and emissions of two alternative types of gas turbine engine for a chosen family vehicle are compared. One engine is a regenerative 71 kW gas turbine; the other is a hybrid power plant composed of a 15 kW gas turbine and a 7 MJ flywheel. These engines would give generally similar vehicle performance to that produced by 71 kW spark ignition and compression ignition engines. (The turbine engines would be lighter and, with a free power turbine, would have a more favourable torque-speed curve (1), giving them some advantages.) Results predict that for long-distance trips the hybrid engine would have a considerably better fuel economy and would produce lower emissions than the piston engines, and that the ‘straight’ gas turbine would be even better. For shorter commuting trips the hybrid would be able to run entirely from energy acquired and stored from house electricity, and it could therefore be the preferred choice for automobiles used primarily for urban driving when environmental factors are taken into account. However, the degradation of remaining energy in flywheel batteries and thermal energy in the regenerator and other engine hot parts between use periods will result in more energy being used than for the straight gas turbine engine using normal liquid fuel. The higher initial cost and greater complexity of the hybrid engine will be additional disadvantages.

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Impact of variable geometry combustor on performance and emissions from miniature gas turbine engine

Journal of the Energy Institute ◽

10.1016/j.joei.2016.01.004 ◽

2017 ◽

Vol 90 (2) ◽

pp. 257-264 ◽

Cited By ~ 8

Author(s):

Maciej Chmielewski ◽

Marian Gieras

Keyword(s):

Gas Turbine ◽

Gas Turbine Engine ◽

Variable Geometry ◽

Turbine Engine ◽

Performance And Emissions

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Performance and Exhaust Emissions of a Gas-Turbine Engine Fueled with Biojet/Jet A-1 Blends for the Development of Aviation Biofuel in Tropical Regions

Energies ◽

10.3390/en13246570 ◽

2020 ◽

Vol 13 (24) ◽

pp. 6570

Author(s):

Iman K. Reksowardojo ◽

Long H. Duong ◽

Rais Zain ◽

Firman Hartono ◽

Septhian Marno ◽

...

Keyword(s):

Gas Turbine ◽

Alternative Fuels ◽

Coconut Oil ◽

Gas Turbine Engine ◽

Inlet Temperature ◽

Exhaust Gas ◽

Gas Temperature ◽

Tropical Regions ◽

Turbine Engine ◽

Performance And Emissions

Biofuels as alternative fuels in today’s world are becoming increasingly important for the reduction of greenhouse gases. Here, we present and evaluate the potential of a new alternative fuel based on the conversion of medium-chain fatty acids to biojet (MBJ), which was produced from coconut oil using hydrotreated processes. MBJ is produced by using both deoxygenation and isomerization processes. Several blends of this type of biojet fuel with Jet A-1 were run in a gas-turbine engine (Rover 1S/60, ROTAX LTD., London, England) for the purpose of investigating engine performance and emissions. Performance results showed almost the same results as those of Jet A-1 fuel for these fuels in terms of thermal efficiency, brake-specific fuel consumption, turbine-inlet temperature, and exhaust-gas temperature. The results of exhaust-gas emissions also showed no significant effects on carbon monoxide, unburned hydrocarbon, and nitrogen oxides, while a decrease in smoke opacity was found when blending MBJ with Jet A-1. MBJ performed well in both performance and emissions tests when run in this engine. Thus, MBJ brings hope for the development of aviation biofuels in tropical regions that have an abundance of bioresources, but are limited in technology and investment capital.

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