Master Degree / Yüksek Lisans Tezleri

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Department: search.filters.department.Thesis (Master)--İzmir Institute of Technology, Energy Systems EngineeringSubject: search.filters.subject.Biomass energy

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  • Master Thesis
    Energy, Exergy and Enviromental Assessment of a Novel Multi-Generation System Fed by Biomass and Geothermal Energy Sources
    (01. Izmir Institute of Technology, 2022) Gökçen Akkurt, Gülden; Mohammadpourfard, Mousa; Gökçen Akkurt, Gülden; Mohammadpourfard, Mousa; 03.06. Department of Energy Systems Engineering; 03. Faculty of Engineering; 01. Izmir Institute of Technology
    Energy is the one of the critical tools that ensure the development of the countries. Since almost no country is completely energy independent, it is very important for countries to use the available energy efficiently and to produce their own energy from renewable energy sources. Multi-generation systems combine various cycles and processes to produce number of outputs and valuable market products using one or multiple energy sources as input. By creating a multi-generation system powered by renewable sources can increase system efficiency and provide some additional outputs such as hydrogen, heating, cooling, and domestic hot water. In this thesis, a novel multi-generation system consisting of a biomass gasification cycle, a double-flash geothermal cycle, an Organic Rankine Cycle and a PEM electrolyzer subsystems, is proposed to increase the efficiency and energy production from biomass and geothermal energy sources instead of using a single source for a single output. The proposed system is analyzed in terms of energy, exergy, and environmental impact point of view. By performing parametric studies for biomass flow rate, turbine inlet temperature, and single-objective optimization, effects on thermodynamic behavior and environmental impact are investigated for subsystems and overall system. The best operating conditions are determined. The findings indicate that energy efficiency of the proposed multi-generation system is 75% higher than a double-flash geothermal power plant. Based on the parametric study, biomass mass flow rate is encountered as the most significant parameter, which caused an 11.7% increase in energy efficiency, and 225% increase in environmental impact cost.
  • Master Thesis
    Heterotrophic Bio-Oil Production From Microalgae
    (Izmir Institute of Technology, 2010) Çağlar, Emre; Bayraktar, Oğuz; Bayraktar, Oğuz; Bayraktar, Oğuz; 03.02. Department of Chemical Engineering; 03. Faculty of Engineering; 01. Izmir Institute of Technology
    The purpose of the thesis is to investigate the parameters affecting heterotrophic production of microalga, Chlorella minutissima. The aim is to use crude glycerol, a waste product derived from biodiesel production, as a carbon and energy source for microalgal growth and examine the optimum growth conditions in chemostat mode, as well as the productivity of oil using FTIR based technique. The highest lipid productivity achieved was 1.04 gl-1h-1, at the temperature 250C, with the dilution rate of 0.25 h-1 and using a substrate concentration of 80 gl-1 in feeding medium. The lipid, protein and carbohydrate content at this conditions was 14.36%, 47.89% and 8.06%, respectively.