The Experts below are selected from a list of 212277 Experts worldwide ranked by ideXlab platform
Marc A. Rosen - One of the best experts on this subject based on the ideXlab platform.
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energy and exergy analyses of a solar biomass integrated cycle for multigeneration
Solar Energy, 2015Co-Authors: Farrukh Khalid, Ibrahim Dincer, Marc A. RosenAbstract:Abstract A biomass and solar integrated system for multigeneration of useful outputs, in which two renewable energy sources are combined to produce multiple outputs (e.g., power, cooling, hot water, heated air), is developed and presented. Energy and exergy analyses are used to assess the performance of the cycle, and the effects of various system parameters on energy and exergy efficiencies of the overall system and its subsystems are examined. The overall energy and exergy efficiencies of the system are found to be 66.5% and 39.7% respectively. Furthermore, the effect is also investigated of Reference-Environment temperature on energy and exergy efficiencies for the system, when operated only on biomass and solar energy.
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energy and exergy analyses of the drying step of a copper chlorine thermochemical cycle for hydrogen production
International Journal of Exergy, 2009Co-Authors: Mehmet F Orhan, Ibrahim Dincer, Marc A. RosenAbstract:Hydrogen can be produced by decomposing water, through thermochemical cycles, in an Environmentally benign manner using nuclear energy. The copper-chlorine (Cu-Cl) cycle is one of the most promising low-temperature thermochemical cycles and involves five main steps: HCl (g) production; oxygen production; copper (Cu) production; drying; hydrogen production. In this study, energy and exergy analyses are performed of the drying step of the Cu-Cl cycle for hydrogen production, considering its operational and Environmental conditions. The evaluation considers efficiencies and various parametric studies are carried out of energetic and exergetic aspects, considering variable evaporator and Reference-Environment temperatures.
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energy and exergy analyses of the fluidized bed of a copper chlorine cycle for nuclear based hydrogen production via thermochemical water decomposition
Chemical Engineering Research & Design, 2009Co-Authors: Mehmet F Orhan, Ibrahim Dincer, Marc A. RosenAbstract:Abstract Nuclear-based hydrogen production via thermochemical water decomposition using a copper–chlorine (Cu–Cl) cycle consists of a series of chemical reactions in which water is split into hydrogen and oxygen as the net result. This is accomplished through reactions involving intermediate copper and chlorine compounds, which are recycled. This cycle consists of three thermally driven reactions and one electrochemical reaction. The cycle involves five steps: (1) HCl(g) production using such equipment as a fluidized bed, (2) oxygen production, (3) copper(Cu) production, (4) drying, and (5) hydrogen production. A chemical reaction takes place in each step, except drying. In this study, the HCI(g) production step of the Cu–Cl cycle for hydrogen production as well as its operational and Environmental conditions are defined, and a comprehensive thermodynamic analysis is performed, incorporating energy and exergy and considering relevant chemical reactions. The performance of the fluidized bed is evaluated through energy and exergy efficiencies, and various parametric studies on energetic and exergetic aspects with variable reaction and Reference-Environment temperatures are carried out.
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the oxygen production step of a copper chlorine thermochemical water decomposition cycle for hydrogen production energy and exergy analyses
Chemical Engineering Science, 2009Co-Authors: Mehmet F Orhan, Ibrahim Dincer, Marc A. RosenAbstract:Abstract In the copper–chlorine (Cu–Cl) thermochemical cycle water is decomposed into its constituents (oxygen and hydrogen) by a series of chemical reactions. The cycle involves five steps in which three thermally driven chemical reactions and one electrochemical reaction take place. Oxygen is produced during one of the main chemical reactions. In the present study, the O 2 production step is described with its operational and Environmental conditions, and energy and exergy analyses are performed. The cycle is assumed driven using nuclear energy. Various parametric studies are carried out on energetic and exergetic aspects of the step, considering variable reaction and Reference-Environment temperatures. At a constant Reference-Environment temperature of 25 °C, the exergy destruction of the O 2 production step varies between 4500 and 23,000 kJ/kmol H 2 when the reaction temperature increases from 450 to 1000 °C. At a 500 °C reaction temperature and a 25 °C Reference-Environment temperature, the exergy destruction for this step is found to be 5300 kJ/kmol H 2 . At a reaction temperature of 500 °C and a Reference-Environment temperature of 25 °C, the exergy efficiency of the step is determined to be 96% and to decrease with increasing reaction temperature and/or Reference-Environment temperature.
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thermodynamic analysis of the copper production step in a copper chlorine cycle for hydrogen production
Thermochimica Acta, 2008Co-Authors: Mehmet F Orhan, Ibrahim Dincer, Marc A. RosenAbstract:Abstract The hybrid copper–chlorine (Cu–Cl) thermo/electrochemical cycle for decomposing water into its constituents is a novel method for hydrogen production. The process involves a series of closed-loop chemical reactions. The cycle is assumed driven in an Environmentally benign manner using nuclear energy. The cycle involves five steps of which three are thermally driven chemical reactions and one has an electrochemical reaction. In the present study, the electrochemical reaction, copper (Cu) production step, is described with its operational and Environmental conditions, and analyzed thermodynamically. Various parametric studies are carried out on energetic and exergetic aspects of the step, considering variable reaction and Reference-Environment temperatures. At a reaction temperature of 45 °C, the reaction heat of the Cu production step is 140,450 kJ/kmol H 2 . At a constant reaction temperature of 45 °C, the exergy destruction of the step varies between 50 kJ/kmol H 2 and 7000 kJ/kmol H 2 when the Reference-Environment temperature increases from 0 °C to 30 °C. At a reaction temperature of 45 °C and a Reference-Environment temperature of 25 °C, the exergy efficiency of this step is 99% and decreases with increasing Reference-Environment and/or reaction temperatures.
Mehmet F Orhan - One of the best experts on this subject based on the ideXlab platform.
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energy and exergy analyses of the drying step of a copper chlorine thermochemical cycle for hydrogen production
International Journal of Exergy, 2009Co-Authors: Mehmet F Orhan, Ibrahim Dincer, Marc A. RosenAbstract:Hydrogen can be produced by decomposing water, through thermochemical cycles, in an Environmentally benign manner using nuclear energy. The copper-chlorine (Cu-Cl) cycle is one of the most promising low-temperature thermochemical cycles and involves five main steps: HCl (g) production; oxygen production; copper (Cu) production; drying; hydrogen production. In this study, energy and exergy analyses are performed of the drying step of the Cu-Cl cycle for hydrogen production, considering its operational and Environmental conditions. The evaluation considers efficiencies and various parametric studies are carried out of energetic and exergetic aspects, considering variable evaporator and Reference-Environment temperatures.
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energy and exergy analyses of the fluidized bed of a copper chlorine cycle for nuclear based hydrogen production via thermochemical water decomposition
Chemical Engineering Research & Design, 2009Co-Authors: Mehmet F Orhan, Ibrahim Dincer, Marc A. RosenAbstract:Abstract Nuclear-based hydrogen production via thermochemical water decomposition using a copper–chlorine (Cu–Cl) cycle consists of a series of chemical reactions in which water is split into hydrogen and oxygen as the net result. This is accomplished through reactions involving intermediate copper and chlorine compounds, which are recycled. This cycle consists of three thermally driven reactions and one electrochemical reaction. The cycle involves five steps: (1) HCl(g) production using such equipment as a fluidized bed, (2) oxygen production, (3) copper(Cu) production, (4) drying, and (5) hydrogen production. A chemical reaction takes place in each step, except drying. In this study, the HCI(g) production step of the Cu–Cl cycle for hydrogen production as well as its operational and Environmental conditions are defined, and a comprehensive thermodynamic analysis is performed, incorporating energy and exergy and considering relevant chemical reactions. The performance of the fluidized bed is evaluated through energy and exergy efficiencies, and various parametric studies on energetic and exergetic aspects with variable reaction and Reference-Environment temperatures are carried out.
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the oxygen production step of a copper chlorine thermochemical water decomposition cycle for hydrogen production energy and exergy analyses
Chemical Engineering Science, 2009Co-Authors: Mehmet F Orhan, Ibrahim Dincer, Marc A. RosenAbstract:Abstract In the copper–chlorine (Cu–Cl) thermochemical cycle water is decomposed into its constituents (oxygen and hydrogen) by a series of chemical reactions. The cycle involves five steps in which three thermally driven chemical reactions and one electrochemical reaction take place. Oxygen is produced during one of the main chemical reactions. In the present study, the O 2 production step is described with its operational and Environmental conditions, and energy and exergy analyses are performed. The cycle is assumed driven using nuclear energy. Various parametric studies are carried out on energetic and exergetic aspects of the step, considering variable reaction and Reference-Environment temperatures. At a constant Reference-Environment temperature of 25 °C, the exergy destruction of the O 2 production step varies between 4500 and 23,000 kJ/kmol H 2 when the reaction temperature increases from 450 to 1000 °C. At a 500 °C reaction temperature and a 25 °C Reference-Environment temperature, the exergy destruction for this step is found to be 5300 kJ/kmol H 2 . At a reaction temperature of 500 °C and a Reference-Environment temperature of 25 °C, the exergy efficiency of the step is determined to be 96% and to decrease with increasing reaction temperature and/or Reference-Environment temperature.
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thermodynamic analysis of the copper production step in a copper chlorine cycle for hydrogen production
Thermochimica Acta, 2008Co-Authors: Mehmet F Orhan, Ibrahim Dincer, Marc A. RosenAbstract:Abstract The hybrid copper–chlorine (Cu–Cl) thermo/electrochemical cycle for decomposing water into its constituents is a novel method for hydrogen production. The process involves a series of closed-loop chemical reactions. The cycle is assumed driven in an Environmentally benign manner using nuclear energy. The cycle involves five steps of which three are thermally driven chemical reactions and one has an electrochemical reaction. In the present study, the electrochemical reaction, copper (Cu) production step, is described with its operational and Environmental conditions, and analyzed thermodynamically. Various parametric studies are carried out on energetic and exergetic aspects of the step, considering variable reaction and Reference-Environment temperatures. At a reaction temperature of 45 °C, the reaction heat of the Cu production step is 140,450 kJ/kmol H 2 . At a constant reaction temperature of 45 °C, the exergy destruction of the step varies between 50 kJ/kmol H 2 and 7000 kJ/kmol H 2 when the Reference-Environment temperature increases from 0 °C to 30 °C. At a reaction temperature of 45 °C and a Reference-Environment temperature of 25 °C, the exergy efficiency of this step is 99% and decreases with increasing Reference-Environment and/or reaction temperatures.
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energy and exergy assessments of the hydrogen production step of a copper chlorine thermochemical water splitting cycle driven by nuclear based heat
International Journal of Hydrogen Energy, 2008Co-Authors: Mehmet F Orhan, Ibrahim Dincer, Marc A. RosenAbstract:Abstract Water is split into hydrogen and oxygen as the net result of the copper–chlorine (Cu–Cl) thermochemical water decomposition cycle. The cycle involves five steps: (1) HCl(g) production using such equipment as a fluidized bed, (2) oxygen production, (3) copper (Cu) production, (4) drying, and (5) hydrogen production. A chemical reaction takes place in each step, except drying. In the present study the hydrogen production step of the Cu–Cl cycle is assessed thermodynamically using energy and exergy methods and considering relevant chemical reactions. Energy and exergy efficiencies of the H2 production step are evaluated and parametric studies are carried out on energetic and exergetic aspects considering variable reaction and Reference-Environment temperatures. At a reaction temperature of 450 °C, the reaction heat of the H2 production step is equal to −55,500 kJ/kmol H2 (exothermic reaction). At a constant Reference-Environment temperature of 25 °C, the exergy destruction of the H2 production step varies between 1000 kJ/kmol H2 and 7000 kJ/kmol H2 when the reaction temperature increases from 300 °C to 450 °C. The exergy destruction decreases with increasing reaction temperature. At a reaction temperature of 450 °C and a Reference-Environment temperature of 25 °C, the exergy efficiency of this step is 99% and decreases with increasing Reference-Environment temperature and increases with increasing reaction temperature. The hydrogen production process is assumed to be driven by nuclear-based heat, yielding an Environmentally benign overall process.
Ibrahim Dincer - One of the best experts on this subject based on the ideXlab platform.
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energy and exergy analyses of a solar biomass integrated cycle for multigeneration
Solar Energy, 2015Co-Authors: Farrukh Khalid, Ibrahim Dincer, Marc A. RosenAbstract:Abstract A biomass and solar integrated system for multigeneration of useful outputs, in which two renewable energy sources are combined to produce multiple outputs (e.g., power, cooling, hot water, heated air), is developed and presented. Energy and exergy analyses are used to assess the performance of the cycle, and the effects of various system parameters on energy and exergy efficiencies of the overall system and its subsystems are examined. The overall energy and exergy efficiencies of the system are found to be 66.5% and 39.7% respectively. Furthermore, the effect is also investigated of Reference-Environment temperature on energy and exergy efficiencies for the system, when operated only on biomass and solar energy.
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development of an integrated renewable energy system for multigeneration
Energy, 2014Co-Authors: F Suleman, Ibrahim Dincer, Martin AgelinchaabAbstract:Abstract In this paper, we propose a new integrated, solar and geothermal energy based system for multigeneration applications, which comprises two ORC (organic Rankine cycles) for power generation, an absorption chiller cycle for cooling production and a drying system to dry wet products. In addition, some useful heat is recovered from the condensers of the ORC for heating applications. In order to determine the irreversibilities, almost all the system components are examined energetically and exergetically. The overall energy and exergy efficiencies of the system are found to be 54.7% and 76.4%, respectively. Moreover, to analyze the system efficiently, parametric studies are also performed to observe the effects of different substantial parameters namely inlet pressure and temperature of the ORC turbine, and Reference Environment temperature in order to investigate the variations in the system performance in terms of the energy and exergy efficiencies.
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energy and exergy analyses of a new four step copper chlorine cycle for geothermal based hydrogen production
Energy, 2010Co-Authors: Tolga M Balta, Ibrahim Dincer, Arif HepbasliAbstract:Abstract In this paper, energy and exergy analyses of the geothermal-based hydrogen production via thermochemical water decomposition using a new, four-step copper–chlorine (Cu–Cl) cycle are conducted, and the respective cycle energy and exergy efficiencies are examined. Also, a parametric study is performed to investigate how each step of the cycle and its overall cycle performance are affected by Reference Environment temperatures, reaction temperatures, as well as energy efficiency of the geothermal power plant itself. As a result, overall energy and exergy efficiencies of the cycle are found to be 21.67% and 19.35%, respectively, for a Reference case.
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energy and exergy analyses of the drying step of a copper chlorine thermochemical cycle for hydrogen production
International Journal of Exergy, 2009Co-Authors: Mehmet F Orhan, Ibrahim Dincer, Marc A. RosenAbstract:Hydrogen can be produced by decomposing water, through thermochemical cycles, in an Environmentally benign manner using nuclear energy. The copper-chlorine (Cu-Cl) cycle is one of the most promising low-temperature thermochemical cycles and involves five main steps: HCl (g) production; oxygen production; copper (Cu) production; drying; hydrogen production. In this study, energy and exergy analyses are performed of the drying step of the Cu-Cl cycle for hydrogen production, considering its operational and Environmental conditions. The evaluation considers efficiencies and various parametric studies are carried out of energetic and exergetic aspects, considering variable evaporator and Reference-Environment temperatures.
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energy and exergy analyses of the fluidized bed of a copper chlorine cycle for nuclear based hydrogen production via thermochemical water decomposition
Chemical Engineering Research & Design, 2009Co-Authors: Mehmet F Orhan, Ibrahim Dincer, Marc A. RosenAbstract:Abstract Nuclear-based hydrogen production via thermochemical water decomposition using a copper–chlorine (Cu–Cl) cycle consists of a series of chemical reactions in which water is split into hydrogen and oxygen as the net result. This is accomplished through reactions involving intermediate copper and chlorine compounds, which are recycled. This cycle consists of three thermally driven reactions and one electrochemical reaction. The cycle involves five steps: (1) HCl(g) production using such equipment as a fluidized bed, (2) oxygen production, (3) copper(Cu) production, (4) drying, and (5) hydrogen production. A chemical reaction takes place in each step, except drying. In this study, the HCI(g) production step of the Cu–Cl cycle for hydrogen production as well as its operational and Environmental conditions are defined, and a comprehensive thermodynamic analysis is performed, incorporating energy and exergy and considering relevant chemical reactions. The performance of the fluidized bed is evaluated through energy and exergy efficiencies, and various parametric studies on energetic and exergetic aspects with variable reaction and Reference-Environment temperatures are carried out.
J. J. Bloem - One of the best experts on this subject based on the ideXlab platform.
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an outdoor test Reference Environment for double skin applications of building integrated photovoltaic systems
Energy and Buildings, 2012Co-Authors: J. J. Bloem, C Lodi, Jordi Cipriano, Daniel ChemisanaAbstract:Abstract This article presents and discusses an outdoor Test Reference Environment (TRE) for double skin applications of Building Integrated PhotoVoltaic (BIPV) Systems. From the experience gained during the past 20 years in several EC research projects, an experimental tested design for a common Test Reference Environment is proposed. This outdoor test set-up allows the assessment of experimental data for electrical and thermal performance evaluation of photovoltaic systems integrated as double skin applications in the building envelope. The specific design of the Test Reference Environment makes it possible to study in a harmonised way through electrical and thermal energy flow analysis, the impact of different materials for PV modules and construction design of building envelopes. The energy balance for BIPV double skin applications is presented as well. The experimental data has been used for validation of modelling work by several academic groups which has resulted in an improved knowledge on the heat transfer, in particular the convective heat exchange coefficient for the specific double skin boundary conditions.
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evaluation of a pv integrated building application in a well controlled outdoor test Environment
Building and Environment, 2008Co-Authors: J. J. BloemAbstract:Abstract This paper presents the assessment of experimental data for electrical and thermal performance evaluation of photovoltaic (PV) systems integrated as cladding components into the building envelope, giving input to modelling and analysis work. From the experience gained in several EU research projects, an improved design for a common Test Reference Environment (TRE) has been developed. This specific design of the PV module and TRE makes it possible to study, through electrical and thermal energy flow analysis, the effect on electrical performance of using different materials for PV modules and the construction design of claddings. The results for a glass–glass PV module with forced ventilation are presented.
Daniel Chemisana - One of the best experts on this subject based on the ideXlab platform.
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an outdoor test Reference Environment for double skin applications of building integrated photovoltaic systems
Energy and Buildings, 2012Co-Authors: J. J. Bloem, C Lodi, Jordi Cipriano, Daniel ChemisanaAbstract:Abstract This article presents and discusses an outdoor Test Reference Environment (TRE) for double skin applications of Building Integrated PhotoVoltaic (BIPV) Systems. From the experience gained during the past 20 years in several EC research projects, an experimental tested design for a common Test Reference Environment is proposed. This outdoor test set-up allows the assessment of experimental data for electrical and thermal performance evaluation of photovoltaic systems integrated as double skin applications in the building envelope. The specific design of the Test Reference Environment makes it possible to study in a harmonised way through electrical and thermal energy flow analysis, the impact of different materials for PV modules and construction design of building envelopes. The energy balance for BIPV double skin applications is presented as well. The experimental data has been used for validation of modelling work by several academic groups which has resulted in an improved knowledge on the heat transfer, in particular the convective heat exchange coefficient for the specific double skin boundary conditions.