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Öğe BIOGAS PRODUCTION FROM ANIMAL MANURE(Taylors Univ Sdn Bhd, 2015) Recebli, Z.; Selimli, S.; Ozkaymak, M.; Gonc, O.An experimental study worked on a model biogas production unit which has 0.5 m(3) fermentation tank capacities of a breeding farm in the Urla district of Izmir/Turkey. The farm animal quantity is 70 cattle and 1400 chicken. Animal wastes (poultry manure and bovine animals manure) were anaerobically fermented in the tank. It is known in literature, the optimum fermentation occurs at 298-313 K temperatures. In this respect, experimentation was performed at summer season and average regional temperature was 307 K and so reaction does not require the extra heating for the optimization of process. Biogas production potential from bovine animal and poultry manure was separately studied. Firstly, 350 kg bovine animal manure blend (175 kg manure+ 175 kg water) filled to the tank and the process occurred. Secondly, 375 kg poultry manure blend (50 kg manure+ 325 kg water) was filled to the tank and the processes done. Then the biogas production rates was evaluated and compared for two processes. Results showed that daily 6.33 m(3) and 0.83 m(3) biogas productions were obtained from fermentation of bovine animal manure and poultry animal manure. Lower heating value of natural gas was known 34,000 kJ/m(3) and biogas LHV value was predicted 21,000 kJ/m3 by the 62% CH4 content. By using biogas as a fuel to the heating or energy systems instead of natural gas about 0.35 $/m(3) energy cost is saved.Öğe Biogas production from animal manure(Taylor's University, 2015) Recebli, Z.; Selimli, S.; Ozkaymak, M.; Gonc, O.An experimental study worked on a model biogas production unit which has 0.5 m3 fermentation tank capacities of a breeding farm in the Urla district of Izmir/Turkey. The farm animal quantity is 70 cattle and 1400 chicken. Animal wastes (poultry manure and bovine animals manure) were anaerobically fermented in the tank. It is known in literature, the optimum fermentation occurs at 298-313 K temperatures. In this respect, experimentation was performed at summer season and average regional temperature was 307 K and so reaction does not require the extra heating for the optimization of process. Biogas production potential from bovine animal and poultry manure was separately studied. Firstly, 350 kg bovine animal manure blend (175 kg manure+175 kg water) filled to the tank and the process occurred. Secondly, 375 kg poultry manure blend (50 kg manure+325 kg water) was filled to the tank and the processes done. Then the biogas production rates was evaluated and compared for two processes. Results showed that daily 6.33 m3 and 0.83 m3 biogas productions were obtained from fermentation of bovine animal manure and poultry animal manure. Lower heating value of natural gas was known 34,000 kJ/m3, and biogas LHV value was predicted 21,000 kJ/m3 by the 62% CH4 content. By using biogas as a fuel to the heating or energy systems instead of natural gas about 0.35 $/m3 energy cost is saved. © School of Engineering, Taylor’s University.Öğe CFD simulation of magnetohydrodynamic flow of a liquid- metal galinstan fluid in circular pipes(2013) Gedik, E.; Kurt, H.; Recebli, Z.In this paper, the steady, laminar, incompressible viscous flow of an electrically conducting liquid-metal fluid is investigated numerically in acircular non-conducting pipe. The considered work fluid is Galinstan (GaInSn, i.e. Gallium-Indium-Tin). Such a liquid metal is subjected to a constantpressure gradient along the axial direction and a uniform transverse magnetic field in the spanwise direction. Numerical simulations are performed by means of the Fluent commercial software (used to solve the governing three dimensional fluid dynamics and electromagnetic field partial differential equations iteratively). The magnetic field induction, B, takes values between 0 and 1.5 T with a 0.5 T step size. The fluid velocity is found to decrease with an increase in the intensity of the applied magnetic field. The results, plotted as a function of system parameters, are critically discussed with respect to potential industrial applications.©2013 Tech Science Press.Öğe CFD Simulation of Magnetohydrodynamic Flow of a Liquid-Metal Galinstan Fluid in Circular Pipes(Tech Science Press, 2013) Gedik, E.; Kurt, H.; Recebli, Z.In this paper, the steady, laminar, incompressible viscous flow of an electrically conducting liquid-metal fluid is investigated numerically in a circular non-conducting pipe. The considered work fluid is Galinstan (GaInSn, i.e. Gallium-Indium-Tin). Such a liquid metal is subjected to a constant pressure gradient along the axial direction and a uniform transverse magnetic field in the spanwise direction. Numerical simulations are performed by means of the Fluent commercial software (used to solve the governing three dimensional fluid dynamics and electromagnetic field partial differential equations iteratively). The magnetic field induction, B, takes values between 0 and 1.5 T with a 0.5 T step size. The fluid velocity is found to decrease with an increase in the intensity of the applied magnetic field. The results, plotted as a function of system parameters, are critically discussed with respect to potential industrial applications.Öğe Convectional heat transfer numerical analysis of mhd steady state laminar lithium pipe flow(Begell House Inc., 2014) Recebli, Z.; Selimli, S.this paper discuss about the effect of normally applied magnetic field on steady state laminar flow of liquid lithium in a horizontal circular pipe model was analysed with ANSYS Fluent, and also convectional heat transfer was examined. Examination was completed by ANSYS Fluent MHD module; the theoretical base of the module established on the Navier Stokes, continuity equation and energy equations. Flow profile was observed for cooling of the fluid with a constant wall temperature. Thermal fully developed but hydro-dynamically transient region of flow was taken to observations. Results of the examination showed that, increase of magnetic field induction, decreased the local flow velocity, but also increased the Nusselt number through the pipe length. Moreover, while the liquid lithium was cooling, the fluid temperature was increased by the increase of magnetic field induction through the pipe length. Increase of magnetic field induction enhanced the convective heat transfer and so, indirectly improved the cooling of liquid lithium. © 2014, Begell House Inc. All rights reserved.Öğe Theoretical examination of the three phase mixture flow in the horizontal cylindrical pipe in homogeneous conditions without gravity(2007) Recebli, Z.In this study, liquid-liquid-solid three phase mixture flow through the pipe have been investigated. A differential equation system representing the steady state flow has been solved analytically with D'Alambert methods; formulas for the local velocities of the mixture phase have been obtained. The unsteady state flow of this mixture was also solved numerically by using finite difference equation method. Local velocity-time graphics has been obtained to see the phase in steady flow progress. The analytical and numerical solution results of steady state flow are compared by plotting local velocity graphs for different radiuses. It was obtained that the velocity profiles from both of the solutions are identical.
