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    Potential of Biogas and Electricity Production from Animal Waste in Turkey
    (Springer, 2021) Caliskan, Meltem; Tumen Ozdil, Naime Filiz
    In this paper, biogas potential produced from animal manure has been calculated using data for various regions of Turkey between 2007 and 2019. Moreover, generation of electricity potential that can be provided using biogas obtained from animal manure resources has been examined. The animal numbers subjected to the study have been reached via the Turkish Statistical Institute. The amount of animal manure, which is the basis for calculating the amount of biogas, has been calculated using the average number of animals and the animal weight. Eastern Anatolia and Central Anatolia Regions have the highest biogas potential with 19% compared with the other regions due to amount of manure obtained from animal. The finding of this study denotes that 76,448 x 10(6) m(3)potential of methane content can be obtained from biogas for the mentioned years, and 2,339,296 x 10(6) MJ potential of heating value can be obtained from this methane value. While the potential of electricity energy, which can be provided from animal manure wastes, has been 231,009 x 10(6)between 2007 and 2019 in Turkey, the total electricity consumption in 2007-2019 is 2,898,040 x 10(6) kWh. The results show that the potential electricity that can be provided from animal manure could meet 7.99% of the electricity consumed in the same years. Furthermore, the cost analysis of biogas facility, which is established in Eastern Anatolia Region, has been performed using circular economy model. According to calculations, the discounted payback period has been found to be 10 years.
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    Öğe
    Thermodynamic, economic and environmental assessments in a cogeneration power plant
    (Taylor & Francis Inc, 2020) Tumen Ozdil, Naime Filiz; Tantekin, Atakan; Pekdur, Arzu
    Exergoeconomic assessment with Specific Exergy Costing (SPECO) technique and an exergoenvironmental analysis for a cogeneration system have been implemented to show the relation among thermodynamics and economical data and environmental impact of each component on the system. Depending upon the outcomes of exergoeconomic analysis, the unitary exergy price and exergy price of the natural gas have been counted as 0.05 US$/GJ and 490.23 US$/h, respectively. The unitary exergetic price and exergetic price of the steam have been counted as 158.84 US$/GJ and 2958.17 US$/h, respectively. Furthermore, the capital investment price, operating and maintenance price, and total price of the cogeneration system have been calculated to be 2185.50, 2316.60, and 4502.08 US$ per hour, respectively. The unitary environmental impact rate and environmental impact rate of the electricity, which is produced in the turbine, have been reckoned as 0.22 mPts/GJ and 0.02 mPts/h, respectively. Moreover, the effects of various fuel loading conditions and steam pressures (from 4 bar to 12 bar) on exergy prices have been investigated. The amount of fuel loading decreases, the exergy price of fuel, steam, and electricity also decreases. As the steam pressure goes up, the price of exergy loss for the boiler goes up whilst the exergy price of steam decreases.