The Experts below are selected from a list of 147 Experts worldwide ranked by ideXlab platform
Ibrahim Dincer - One of the best experts on this subject based on the ideXlab platform.
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Exergoeconomic analysis of a new integrated copper-chlorine cycle for hydrogen production
International Journal of Hydrogen Energy, 2020Co-Authors: Faran Razi, Ibrahim Dincer, Kamiel GabrielAbstract:Abstract In this study, an exergoeconomic analysis is performed on an integrated four-step thermochemical copper-chlorine cycle developed at the Ontario Tech. University through exergy, cost, energy, and mass (EXCEM) method. A Thermodynamic model is first constructed in Aspen-plus (a process simulation software) to simulate and investigate the integrated cycle through exergy and energy analyses. The capital costs, Thermodynamic Loss rates, and the ratio of the Thermodynamic Loss rate to the capital cost of various system's components are also determined. Moreover, the average unit cost of hydrogen is evaluated and the influence of several system's parameters on the unit cost of hydrogen is analyzed. The results show that the cost of hydrogen is strongly dependent on the production capacity of the plant. Based on the analysis, our system generates hydrogen at an average unit cost of 5.54 $/kg with a plant capacity of 1619.3 kg/h considering both internal (operating and maintenance costs, etc.) and external (costs of various inputs, etc.) parameters.
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Exergoeconomic Analysis of a Combined Ammonia Based Solid Oxide Fuel Cell System
Fuel Cells, 2012Co-Authors: E. Baniasadi, Ibrahim Dincer, Greg F. NatererAbstract:An exergoeconomic study of an ammonia-fed solid oxide fuel cell (SOFC) based combined system for transportation applications is presented in this paper. The relations between capital costs and Thermodynamic Losses for the system components are investigated. The exergoeconomic analysis includes the SOFC stack and system components, including the compressor, microturbine, pressure regulator, and heat exchangers. A parametric study is also conducted to investigate the system performance and costs of the components, depending on the operating temperature, exhaust temperature, and fuel utilization ratio. A parametric study is performed to show how the ratio of the Thermodynamic Loss rate to capital cost changes with operating parameters. For the devices and the overall system, some practical correlations are introduced to relate the capital cost and total exergy Loss. The ratio of exergy consumption to capital cost is found to be strongly dependent on the current density and stack temperature, but less affected by the fuel utilization ratio.
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Thermodynamic analysis of hydrogen production from biomass gasification
International Journal of Hydrogen Energy, 2010Co-Authors: M.k. Cohce, Ibrahim Dincer, Marc A. RosenAbstract:Abstract In this study, we investigate biomass-based hydrogen production through exergy and exergoeconomic analyses and evaluate all components and associated streams using an exergy, cost, energy and mass (EXCEM) method. Then, we define the hydrogen unit cost and examine how key system parameters affect the unit hydrogen cost. Also, we present a case study of the gasification process with a circulating fluidized bed gasifier (CFBG) for hydrogen production using the actual data taken from the literature. We first calculate energy and exergy values of all streams associated with the system, exergy efficiencies of all equipment, and determine the costs of equipment along with their Thermodynamic Loss rates and ratio of Thermodynamic Loss rate to capital cost. Furthermore, we evaluate the main system components, consisting of gasifier and PSA, from the exergoeconomic point of view. Moreover, we investigate the effects of various parameters on unit hydrogen cost, such as unit biomass and unit power costs and hydrogen content of the syngas before PSA equipment and PSA hydrogen recovery. The results show that the CFBG system, which has energy and exergy efficiencies of 55.11% and 35.74%, respectively, generates unit hydrogen costs between 5.37 $/kg and 1.59 $/kg, according to the internal and external parameters considered.
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Analysis of Some Exergoeconomic Parameters of Small Wind Turbine System
International Journal of Green Energy, 2009Co-Authors: Onder Ozgener, Leyla Ozgener, Ibrahim DincerAbstract:This paper investigates some exergoeconomic parameters (energy and exergy Loss ratios) for a 1.5 kW wind turbine system, linking capital costs and Thermodynamic Losses, based on some operating conditions. The results show that while the ratio of energy Loss rate to capital cost (Ren) changes between 0.007 and 0.813 at different wind speeds, the ratio of exergy Loss rate to capital cost (Rex) changes between 0.006 and 0.411. In addition, the maximum Ren and Rex values are obtained at a wind speed of 12 m/s. Furthermore, a parametric study is undertaken to investigate how varying wind speed will affect the exergoeconomic parameters of the wind turbine system and to develop a correlation between the ratio of Thermodynamic Loss rate to capital cost and wind speed for practical applications of wind energy systems.
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Exergoeconomic analysis of geothermal district heating systems: A case study
Applied Thermal Engineering, 2007Co-Authors: Leyla Ozgener, Arif Hepbasli, Ibrahim Dincer, Marc A. RosenAbstract:An exergoeconomic study of geothermal district heating systems through mass, energy, exergy and cost accounting analyses is reported and a case study is presented for the Salihli geothermal district heating system (SGDHS) in Turkey to illustrate the present method. The relations between capital costs and Thermodynamic Losses for the system components are also investigated. Thermodynamic Loss rate-to-capital cost ratios are used to show that, for the devices and the overall system, a systematic correlation appears to exist between capital cost and exergy Loss (total or internal), but not between capital cost and energy Loss or external exergy Loss. Furthermore, a parametric study is conducted to determine how the ratio of Thermodynamic Loss rate to capital cost changes with reference temperature and to develop a correlation that can be used for practical analyses. The correlations may imply that devices in successful district heating systems such as the SGDHS are configured so as to achieve an overall optimal design, by appropriately balancing the Thermodynamic (exergy-based) and economic (cost) characteristics of the overall systems and their devices.
T. H. K. Frederking - One of the best experts on this subject based on the ideXlab platform.
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Thermodynamic Losses in pulse tube coolers : Throttling irreversibility including contamination effects
Advances in cryogenic engineering, 2000Co-Authors: L. Rohlin, T. H. K. FrederkingAbstract:We have continued studies of the Thermodynamic Losses in pulse tube coolers. The topics addressed are Loss functions for pressure drop in a single component, Loss analog for irreversible pressure differences associated with irreversible temperature differences (Gifford-Longsworth model), Joule-Thomson [JT] throttling and orifice Loss modeling. In the experiments we have determined Thermodynamic Loss effects including contamination influences during a long-term test of approximately 2000 hours.
Arif Hepbasli - One of the best experts on this subject based on the ideXlab platform.
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Exergoeconomic analysis of energy utilization of drying process in a ceramic production
Applied Thermal Engineering, 2014Co-Authors: Zafer Utlu, Arif HepbasliAbstract:Abstract Thermo economic cost analysis of a ceramic plant, with a yearly production capacity of 24 million m 2 , was performed based on the actual operational data. The ceramic drying system was analyzed at the spray dryer, the vertical dryer and the furnace stages. The performances of these three processes and the effects of the process conditions on the process performance were evaluated using energetic, exergetic, and exergoeconomic analysis methods. The performance assessment was performed through energy and exergy efficiencies, the improvement potential rate, the total cost, and the exergoeconomic factor terms. The ratio of the Thermodynamic Loss rate to the capital cost values was obtained in the range of 53.38–135.83 MW/$. In this process, there is a great potential towards increasing the energy and exergy utilization efficiencies.
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Exergoeconomic aspects of sectoral energy utilization for Turkish industrial sector and their impact on energy policies
Energy Policy, 2009Co-Authors: Zafer Utlu, Arif HepbasliAbstract:Abstract This study deals with this thermo-economic analysis of energy utilization in the industrial sector (IS) towards establishing energy policies. The relations between capital costs and Thermodynamic Losses for subsectors in the IS are investigated. In the analysis, Turkey is taken as an application country based on its actual data over the period from 1990 to 2003. Energy and exergy analyses are performed for eight industrial modes, namely iron–steel, chemical–petrochemical, petrochemical–feedstock, cement, fertilizer, sugar, non-metal industry, other industry. The energy and exergy utilization efficiency values for the entire Turkish IS are obtained to range from 63.45% to 70.11%, and from 29.72% to 33.23%, respectively. The ratio of Thermodynamic Loss rate-to-capital cost values is also calculated to vary from 0.76 to 1.01.
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Thermoeconomic analysis of energy utilization in the residential–commercial sector: An application
Building and Environment, 2008Co-Authors: Zafer Utlu, Arif HepbasliAbstract:Abstract Thermoeconomic analysis is a very useful tool for investigators in engineering and other disciplines since its methodology includes the quantities such as mass, energy, exergy and cost. This study deals with this analysis of energy utilization in the residential–commercial sector (RCS). In this regard, the relations between capital costs and Thermodynamic Losses for subsectors in the RCS are investigated. In the analysis, Turkey is taken as an application country based on its actual and projected values for the years 1991, 1993, 1995, 1999, 2000 and 2001, and for the year 2020, respectively. It is observed from the results obtained that the maximum exergy destructions in the system particularly occur due to the utilization of the large-cost and high-quality energy sources like petroleum, natural gas carriers in the low-energy needs. In conjunction with this, the values for the total exergy Losses are found to vary from 486.43 to 2797.28 PJ, while those for the improvement potential are obtained to range from 58.80 to 1870 PJ in the Turkish RCS for the analyzed years. The ratio of Thermodynamic Loss rate-to-capital cost values is also calculated to be in the range of 0.76–1.01. It is expected that the results presented here would be beneficial to the researchers, government administration and engineers working in the area of modeling the subsectors of countries using thermoeconomic analysis method.
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a parametric study on the exergoeconomic assessment of a vertical ground coupled geothermal heat pump system
Building and Environment, 2007Co-Authors: Onder Ozgener, Arif Hepbasli, Leyla OzgenerAbstract:Abstract An exergoeconomic model of a vertical ground-source heat pump residential heating system presented in this study uses exergy and cost energy mass (EXCEM) methods. The data obtained from a ground-source heat pump (GSHP) residential heating system installed at the Solar Energy Institute, Ege University, Turkey, are utilized for calculations at different reference temperature values in the range 0–25 °C. The performance of the geothermal heat pump residential heating system is evaluated to indicate how exergoecomic parameter values change with system. We also undertake a parametric study to investigate how varying reference temperatures will affect the exergoeconomic analysis of the GSHP system. A correlation between the ratio of Thermodynamic Loss rate to capital cost and reference state temperature is developed.
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Exergoeconomic analysis of geothermal district heating systems: A case study
Applied Thermal Engineering, 2007Co-Authors: Leyla Ozgener, Arif Hepbasli, Ibrahim Dincer, Marc A. RosenAbstract:An exergoeconomic study of geothermal district heating systems through mass, energy, exergy and cost accounting analyses is reported and a case study is presented for the Salihli geothermal district heating system (SGDHS) in Turkey to illustrate the present method. The relations between capital costs and Thermodynamic Losses for the system components are also investigated. Thermodynamic Loss rate-to-capital cost ratios are used to show that, for the devices and the overall system, a systematic correlation appears to exist between capital cost and exergy Loss (total or internal), but not between capital cost and energy Loss or external exergy Loss. Furthermore, a parametric study is conducted to determine how the ratio of Thermodynamic Loss rate to capital cost changes with reference temperature and to develop a correlation that can be used for practical analyses. The correlations may imply that devices in successful district heating systems such as the SGDHS are configured so as to achieve an overall optimal design, by appropriately balancing the Thermodynamic (exergy-based) and economic (cost) characteristics of the overall systems and their devices.
Marc A. Rosen - One of the best experts on this subject based on the ideXlab platform.
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Thermodynamic analysis of hydrogen production from biomass gasification
International Journal of Hydrogen Energy, 2010Co-Authors: M.k. Cohce, Ibrahim Dincer, Marc A. RosenAbstract:Abstract In this study, we investigate biomass-based hydrogen production through exergy and exergoeconomic analyses and evaluate all components and associated streams using an exergy, cost, energy and mass (EXCEM) method. Then, we define the hydrogen unit cost and examine how key system parameters affect the unit hydrogen cost. Also, we present a case study of the gasification process with a circulating fluidized bed gasifier (CFBG) for hydrogen production using the actual data taken from the literature. We first calculate energy and exergy values of all streams associated with the system, exergy efficiencies of all equipment, and determine the costs of equipment along with their Thermodynamic Loss rates and ratio of Thermodynamic Loss rate to capital cost. Furthermore, we evaluate the main system components, consisting of gasifier and PSA, from the exergoeconomic point of view. Moreover, we investigate the effects of various parameters on unit hydrogen cost, such as unit biomass and unit power costs and hydrogen content of the syngas before PSA equipment and PSA hydrogen recovery. The results show that the CFBG system, which has energy and exergy efficiencies of 55.11% and 35.74%, respectively, generates unit hydrogen costs between 5.37 $/kg and 1.59 $/kg, according to the internal and external parameters considered.
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Exergoeconomic analysis of geothermal district heating systems: A case study
Applied Thermal Engineering, 2007Co-Authors: Leyla Ozgener, Arif Hepbasli, Ibrahim Dincer, Marc A. RosenAbstract:An exergoeconomic study of geothermal district heating systems through mass, energy, exergy and cost accounting analyses is reported and a case study is presented for the Salihli geothermal district heating system (SGDHS) in Turkey to illustrate the present method. The relations between capital costs and Thermodynamic Losses for the system components are also investigated. Thermodynamic Loss rate-to-capital cost ratios are used to show that, for the devices and the overall system, a systematic correlation appears to exist between capital cost and exergy Loss (total or internal), but not between capital cost and energy Loss or external exergy Loss. Furthermore, a parametric study is conducted to determine how the ratio of Thermodynamic Loss rate to capital cost changes with reference temperature and to develop a correlation that can be used for practical analyses. The correlations may imply that devices in successful district heating systems such as the SGDHS are configured so as to achieve an overall optimal design, by appropriately balancing the Thermodynamic (exergy-based) and economic (cost) characteristics of the overall systems and their devices.
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Exergoeconomic analysis of power plants operating on various fuels
Applied Thermal Engineering, 2003Co-Authors: Marc A. Rosen, Ibrahim DincerAbstract:The relation is investigated between capital costs and Thermodynamic Losses for devices in modern coal-fired, oil-fired and nuclear electrical generating stations. Thermodynamic Loss rate-to-capital cost ratios are used to show that, for station devices and the overall station, a systematic correlation appears to exist between capital cost and exergy Loss (total or internal), but not between capital cost and energy Loss or external exergy Loss. The possible existence is indicated of a correlation between the mean Thermodynamic Loss rate-to-capital cost ratios for all of the devices in a station and the ratios for the overall station, when the ratio is based on total or internal exergy Losses. This correlation may imply that devices in successful electrical generating stations are configured so as to achieve an overall optimal design, by appropriately balancing the Thermodynamic (exergy-based) and economic characteristics of the overall station and its devices. The results may (i) provide useful insights into the relations between Thermodynamics and economics, both in general and for electrical generating stations, (ii) help demonstrate the merits of second-law analysis, and (iii) extend throughout the electrical utility sector.
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Thermoeconomic analysis of power plants: an application to a coal fired electrical generating station
Energy Conversion and Management, 2003Co-Authors: Marc A. Rosen, Ibrahim DincerAbstract:Several Thermodynamic relations between energy and exergy Losses and capital costs for thermal systems and equipment are developed and applied to a modern coal fired electrical generating station. Some possible generalizations of the results are also discussed. The application considers the overall station and the following station devices: turbine generators, steam generators, preheating devices and condensers. The data suggest that an important parameter is the ratio of the Thermodynamic Loss rate to capital cost. The relative spread in the ratio values for different devices is seen to be large when based on energy Loss and small when based on exergy Loss. The results suggest that a systematic correlation exists for capital cost and exergy Loss but not for capital cost and energy Loss. The results further suggest that the devices in modern coal fired electrical generating stations approximately conform to a particular ratio value (based on exergy Loss), which reflects the appropriate trade-off between exergy Losses and capital costs that is practiced in successful plant designs. Further research is justified on the relations between the Thermodynamic Losses and capital costs, in general, and on the extension of the present results to different technologies, in particular. It is anticipated that the results will provide insights useful to designers into the relations between the Thermodynamic Losses and capital costs and will help to demonstrate the merits of second law analysis over the more conventional first law analysis techniques.
L. Rohlin - One of the best experts on this subject based on the ideXlab platform.
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Thermodynamic Losses in pulse tube coolers : Throttling irreversibility including contamination effects
Advances in cryogenic engineering, 2000Co-Authors: L. Rohlin, T. H. K. FrederkingAbstract:We have continued studies of the Thermodynamic Losses in pulse tube coolers. The topics addressed are Loss functions for pressure drop in a single component, Loss analog for irreversible pressure differences associated with irreversible temperature differences (Gifford-Longsworth model), Joule-Thomson [JT] throttling and orifice Loss modeling. In the experiments we have determined Thermodynamic Loss effects including contamination influences during a long-term test of approximately 2000 hours.
