Application of bioethanol in gas turbines

To reduce our dependence on primer energy resources, renewable fuels are appearing in an increasing number of fields. Environment has a major effect on theoperating conditions of a gas turbine. Thermal efficiency and power loss occurs, due to higher ambient temperature in summers. There are certain methods to reduce gas turbine inlet temperature, e.g. water evaporation, adsorption and mechanical cooling. Ours is the following: inject bioethanol into the inlet air, which will evaporate, so it reduces inlet temperature. Emission and efficiency measurements were taken to evaluate this method. The Department´s Capstone C330 gas turbine use airblast atomizers for liquid fuel evaporation. Air, as auxiliary medium was replaced with ethanol-water compound steam,which can be easily produced with waste heat of the gas turbine. A test pad was built to examine an isolated fuel nozzle in operation. Pictures and high frame rate videos were taken for visual evaluation. This information helped us to fine-tune our system, and then optimal operating conditions were determined

Evaporation of Renewable Fuels in a Lean Premixed Prevaporized Burner

The last decades have emphasized the requirement for alternative energy sources, particularly in the transport sector, where combustible liquid fuels are expected to dominate in the foreseeable future. In such applications, the fuel must be efficiently atomized, evaporated, and mixed with the combustion air before it reaches the flame front, in order to meet the latest pollutant emission standards.Hence, this paper investigates the utilization of nine different fossil and renewable liquid fuels. The domain of the analysis is a lean premixed prevaporized burner equipped with an air blast atomizer and a mixing tube. Analytical calculations are performed to determine the evaporation process after the atomization; then the evaporation time is compared to the residence time of the droplets in the mixing tube. The effect of preheating both the fuel and the combustion air is also examined to determine proper combustion conditions even for the low volatile crude vegetable oils

Porlasztás sebességképének elemzése statisztikai momentumok segítségével: Evaluation of the velocity profile of airblast spray with statictical momenta

Atomization can be found in numerous fields of engineering sciences, from agriculture to applications in energy. During the present research, the analysis of a spray Phase Doppler Anemometer measurement data, generated by a micro gas turbine burner was performed. In this paper, the velocity profiles of the spray were evaluated by statistical momenta at various atomizing conditions, measurement locations, and liquid types. Kivonat Porlasztással a mérnöki tudományok számos területén találkozunk a mezőgazdaságtól kezdve az energetikai alkalmazásokig. Kutatásaink során egy mikrogázturbina égő által előállított permet Fázis Doppler Anemométeres mérés eredményeit vizsgáltuk. Jelen cikkben a képzett permetben kialakuló sebességprofil statisztikai momentumok segítségével történő értékelését tárgyaljuk különböző folyadékok, porlasztási feltételek és permetbeli pozíciók mentén. &nbsp