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Ibrahim Dincer - One of the best experts on this subject based on the ideXlab platform.
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new Trigeneration system integrated with desalination and industrial waste heat recovery for hydrogen production
Applied Thermal Engineering, 2018Co-Authors: H Ishaq, Ibrahim Dincer, G F NatererAbstract:Abstract An integrated Trigeneration system for electricity, hydrogen and fresh water production using waste heat from a glass melting furnace is analyzed in this paper. The heat source for the integrated system is flue gas ejected from a glass melting furnace. This heat source is integrated with a thermochemical copper-chlorine (Cu-Cl) cycle for hydrogen production, reverse osmosis desalination for fresh water production, and Rankine cycle for electricity production. A four-step copper-chlorine cycle is used in this paper. The Trigeneration system is modeled and analyzed in Aspen Plus simulation software and Engineering Equation Solver (EES). The reverse osmosis desalination unit provides the system with 17.4 kg/s of fresh water, while the hydrogen production rate is 12 g/s. Energy and exergy analyses are performed on the integrated Trigeneration system. The overall energy and exergy efficiencies of the integrated system are 47.7% and 37.9%, respectively. Additional results and sensitivity studies are presented and discussed in this paper.
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Chapter 2.19 – Thermodynamic and Thermoeconomic Comparisons of Two Trigeneration Systems
Exergetic Energetic and Environmental Dimensions, 2017Co-Authors: Parisa Heidarnejad, Alireza Noorpoor, Ibrahim DincerAbstract:Abstract In this chapter, two Trigeneration systems with different cooling systems using the waste heat of a cement plant were examined from the thermodynamic and thermoeconomic perspectives. The waste heat from a cement plant was considered as the energy input for both systems. Energy, exergy, and thermoeconomic analyses were conducted to evaluate the technical and economic performance of these two Trigeneration systems. The results showed that recovering heat for these two Trigeneration systems achieved energy and exergy efficiencies of 89% and 48%, respectively, for the Trigeneration-absorption system and 61% and 50%, respectively, for the Trigeneration-ejector system. The thermoeconomic results indicated that the product cost rate was $103.7/h for the Trigeneration-absorption system and $40.9/h for the Trigeneration-ejector system. The analysis demonstrated that the Trigeneration-absorption system had better performance from the viewpoint of heating and cooling capacities. Finally, a parametric study was carried to investigate the role of some system parameters on the overall system performance.
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energy and exergy analyses of an ethanol fueled solid oxide fuel cell for a Trigeneration system
Energy, 2015Co-Authors: Phanicha Tippawan, Amornchai Arpornwichanop, Ibrahim DincerAbstract:This paper examines an integrated SOFC (solid oxide fuel cell) system with an absorption chiller that uses heat recovery of the SOFC exhaust gas for combined cooling, heating, and power production (Trigeneration) through energy and exergy analyses. The system consists of an ethanol reformer, SOFCs, an air pre-heater, a steam generator and a double-effect LiBr/H2O absorption chiller. Validation of the SOFC and absorption chiller models is performed by comparison with published data. To assess the system performance and determine the irreversibility in each component, a parametric study of the effects of changing the current density, SOFC temperature, fuel utilization ratio and SOFC anode recirculation ratio on the net electrical efficiency and the efficiency of heating cogeneration, cooling cogeneration and Trigeneration is presented. The study shows that in the Trigeneration plant, there is at least a 32% gain in efficiency, compared to the conventional power cycle. This study also demonstrates that the proposed Trigeneration system represents an attractive option to improve the heat recovery and enhance the exergetic performance of the system.
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thermoeconomic optimization of three Trigeneration systems using organic rankine cycles part ii applications
Energy Conversion and Management, 2013Co-Authors: Ibrahim Dincer, Fahad A Alsulaiman, Feridun HamdullahpurAbstract:Abstract This part I of the study presents the thermoeconomic optimization formulations of three new Trigeneration systems using organic Rankine cycle (ORC): SOFC-Trigeneration, biomass-Trigeneration, and solar-Trigeneration systems. A thermoeconomic modeling is employed using the specific exergy costing (SPECO) method while the optimization performed using the Powell’s method to minimize the product cost of Trigeneration (combined, cooling, heating, and power). The results help in understanding how to apply the thermoeconomic modeling and thermoeconomic optimization to a Trigeneration system.
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Thermoeconomic optimization of three Trigeneration systems using organic Rankine cycles: Part II – Applications
Energy Conversion and Management, 2013Co-Authors: Fahad A. Al-sulaiman, Ibrahim Dincer, Feridun HamdullahpurAbstract:Abstract This part I of the study presents the thermoeconomic optimization formulations of three new Trigeneration systems using organic Rankine cycle (ORC): SOFC-Trigeneration, biomass-Trigeneration, and solar-Trigeneration systems. A thermoeconomic modeling is employed using the specific exergy costing (SPECO) method while the optimization performed using the Powell’s method to minimize the product cost of Trigeneration (combined, cooling, heating, and power). The results help in understanding how to apply the thermoeconomic modeling and thermoeconomic optimization to a Trigeneration system.
Fahad A Alsulaiman - One of the best experts on this subject based on the ideXlab platform.
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thermoeconomic optimization of three Trigeneration systems using organic rankine cycles part ii applications
Energy Conversion and Management, 2013Co-Authors: Ibrahim Dincer, Fahad A Alsulaiman, Feridun HamdullahpurAbstract:Abstract This part I of the study presents the thermoeconomic optimization formulations of three new Trigeneration systems using organic Rankine cycle (ORC): SOFC-Trigeneration, biomass-Trigeneration, and solar-Trigeneration systems. A thermoeconomic modeling is employed using the specific exergy costing (SPECO) method while the optimization performed using the Powell’s method to minimize the product cost of Trigeneration (combined, cooling, heating, and power). The results help in understanding how to apply the thermoeconomic modeling and thermoeconomic optimization to a Trigeneration system.
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energy and exergy analyses of a biomass Trigeneration system using an organic rankine cycle
Energy, 2012Co-Authors: Ibrahim Dincer, Fahad A Alsulaiman, Feridun HamdullahpurAbstract:In this study, energy and exergy analyses of a biomass Trigeneration system using an organic Rankine cycle (ORC) are presented. Four cases are considered for analysis: electrical-power, cooling-cogeneration, heating-cogeneration and Trigeneration cases. The results obtained reveal that the best performance of the Trigeneration system considered can be obtained with the lowest ORC evaporator pinch temperature considered, Tpp = 20 K, and the lowest ORC minimum temperature, T9 = 345 K. In addition, this study reveals that there is a significant improvement when Trigeneration is used as compared to only electrical power production. This study demonstrates that the fuel utilization efficiency increases, in average, from 12% for electrical power to 88% for Trigeneration. Moreover, the maximum exergy efficiency of the ORC is 13% and, when Trigeneration is used, it increases to 28%. Furthermore, this study reveals that the electrical to cooling ratio can be controlled through changing the ORC evaporator pinch point temperature and/or the pump inlet temperature. In addition, the study reveals that the biomass burner and the ORC evaporator are the main two sources of exergy destruction. The biomass burner contributes to 55% of the total destructed exergy whereas the ORC evaporator contributes to 38% of the total destructed exergy.
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performance comparison of three Trigeneration systems using organic rankine cycles
Energy, 2011Co-Authors: Feridun Hamdullahpur, Fahad A Alsulaiman, Ibrahim DincerAbstract:In this paper, energetic performance comparison of three Trigeneration systems is presented. The systems considered are SOFC-Trigeneration, biomass-Trigeneration, and solar-Trigeneration systems. This study compares the performance of the systems considered when there is only electrical power and the efficiency improvement of these systems when there is Trigeneration. Different key output parameters are examined: energy efficiency, net electrical power, electrical to heating and cooling ratios, and (GHG) GHG (greenhouse gas) emissions. This study shows that the SOFC-Trigeneration system has the highest electrical efficiency among the three systems. Alternatively, when Trigeneration is used, the efficiencies of all three systems considered increase considerably. The maximum Trigeneration efficiency of the SOFC-Trigeneration system is around 76% while it is around 90% for the biomass-Trigeneration system. On the other hand, the maximum Trigeneration efficiencies of the solar-Trigeneration system is around 90% for the solar mode, 45% for storage and storage mode, and 41% for the storage mode. In addition, this study shows that the emissions of CO2 in kg per MWh of electrical power are high for the biomass-Trigeneration and SOFC-Trigeneration systems. However, by considering the emissions per MWh of Trigeneration, their values drop to less than one fourth.
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exergy modeling of a new solar driven Trigeneration system
Solar Energy, 2011Co-Authors: Ibrahim Dincer, Fahad A Alsulaiman, Feridun HamdullahpurAbstract:Abstract In this paper, exergy modeling is used to assess the exergetic performance of a novel Trigeneration system using parabolic trough solar collectors (PTSC) and an organic Rankine cycle (ORC). Four cases are considered: electrical-power, cooling-cogeneration, heating-cogeneration, and Trigeneration. In this Trigeneration system a single-effect absorption chiller is utilized to provide the necessary cooling energy and a heat exchanger is utilized to provide the necessary heating energy. The Trigeneration system considered is examined using three modes of operation. They are: solar mode during the low-solar radiation time of the day, solar and storage mode during the high-solar radiation time of the day, and storage mode during night time. The storage mode is operated through the heat collected in a thermal storage tank during the solar and storage mode. The exergy efficiencies and exergy destruction rates are examined under the variation of the ORC evaporator pinch point temperature, ORC pump inlet temperature, and turbine inlet pressure. This study reveals that the maximum electrical-exergy efficiency for the solar mode is 7%, for the solar and storage mode is 3.5%, and for the storage mode is 3%. Alternatively, when Trigeneration is used, the exergy efficiency increases noticeably. The maximum Trigeneration-exergy efficiency for the solar mode is 20%, for solar and storage mode is 8%, and for the storage mode is 7%. Moreover, this study shows that the main sources of exergy destruction rate are the solar collectors and ORC evaporators. Therefore, careful selection and design of these two components are essential to reduce the exergy destructed by them and, thus, increase the exergy efficiencies of the system.
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Trigeneration a comprehensive review based on prime movers
International Journal of Energy Research, 2011Co-Authors: Fahad A Alsulaiman, Feridun Hamdullahpur, Ibrahim DincerAbstract:In this paper, various aspects of Trigeneration power plants including advantages, challenges and criteria for high efficiency operation are discussed. In Trigeneration systems, prime movers are treated to be the heart of the plant and thus an appropriate selection is crucial for successful operation. A comparative analysis of potential prime movers, together with a comprehensive literature review used in Trigeneration and, their selection criteria are presented. A case study of a Trigeneration plant based on solid oxide fuel cells and an organic Rankine cycle is examined using thermodynamic analysis. This thermodynamic analysis includes performance assessment of the system through energy and exergy efficiencies. An environmental impact assessment is also conducted based on CO2 emissions as a measure. The present study reveals that compared to power cycle efficiency (considering net electrical efficiency), there is a minimum potential of 22% gain in efficiency when Trigeneration is used. Also, it is shown that there is more than 200 kg MWh−1 reduction in CO2 emissions when Trigeneration is used compared to the case where a power cycle is only used. Copyright © 2010 John Wiley & Sons, Ltd.
Feridun Hamdullahpur - One of the best experts on this subject based on the ideXlab platform.
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thermoeconomic optimization of three Trigeneration systems using organic rankine cycles part ii applications
Energy Conversion and Management, 2013Co-Authors: Ibrahim Dincer, Fahad A Alsulaiman, Feridun HamdullahpurAbstract:Abstract This part I of the study presents the thermoeconomic optimization formulations of three new Trigeneration systems using organic Rankine cycle (ORC): SOFC-Trigeneration, biomass-Trigeneration, and solar-Trigeneration systems. A thermoeconomic modeling is employed using the specific exergy costing (SPECO) method while the optimization performed using the Powell’s method to minimize the product cost of Trigeneration (combined, cooling, heating, and power). The results help in understanding how to apply the thermoeconomic modeling and thermoeconomic optimization to a Trigeneration system.
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Thermoeconomic optimization of three Trigeneration systems using organic Rankine cycles: Part II – Applications
Energy Conversion and Management, 2013Co-Authors: Fahad A. Al-sulaiman, Ibrahim Dincer, Feridun HamdullahpurAbstract:Abstract This part I of the study presents the thermoeconomic optimization formulations of three new Trigeneration systems using organic Rankine cycle (ORC): SOFC-Trigeneration, biomass-Trigeneration, and solar-Trigeneration systems. A thermoeconomic modeling is employed using the specific exergy costing (SPECO) method while the optimization performed using the Powell’s method to minimize the product cost of Trigeneration (combined, cooling, heating, and power). The results help in understanding how to apply the thermoeconomic modeling and thermoeconomic optimization to a Trigeneration system.
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energy and exergy analyses of a biomass Trigeneration system using an organic rankine cycle
Energy, 2012Co-Authors: Ibrahim Dincer, Fahad A Alsulaiman, Feridun HamdullahpurAbstract:In this study, energy and exergy analyses of a biomass Trigeneration system using an organic Rankine cycle (ORC) are presented. Four cases are considered for analysis: electrical-power, cooling-cogeneration, heating-cogeneration and Trigeneration cases. The results obtained reveal that the best performance of the Trigeneration system considered can be obtained with the lowest ORC evaporator pinch temperature considered, Tpp = 20 K, and the lowest ORC minimum temperature, T9 = 345 K. In addition, this study reveals that there is a significant improvement when Trigeneration is used as compared to only electrical power production. This study demonstrates that the fuel utilization efficiency increases, in average, from 12% for electrical power to 88% for Trigeneration. Moreover, the maximum exergy efficiency of the ORC is 13% and, when Trigeneration is used, it increases to 28%. Furthermore, this study reveals that the electrical to cooling ratio can be controlled through changing the ORC evaporator pinch point temperature and/or the pump inlet temperature. In addition, the study reveals that the biomass burner and the ORC evaporator are the main two sources of exergy destruction. The biomass burner contributes to 55% of the total destructed exergy whereas the ORC evaporator contributes to 38% of the total destructed exergy.
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performance comparison of three Trigeneration systems using organic rankine cycles
Energy, 2011Co-Authors: Feridun Hamdullahpur, Fahad A Alsulaiman, Ibrahim DincerAbstract:In this paper, energetic performance comparison of three Trigeneration systems is presented. The systems considered are SOFC-Trigeneration, biomass-Trigeneration, and solar-Trigeneration systems. This study compares the performance of the systems considered when there is only electrical power and the efficiency improvement of these systems when there is Trigeneration. Different key output parameters are examined: energy efficiency, net electrical power, electrical to heating and cooling ratios, and (GHG) GHG (greenhouse gas) emissions. This study shows that the SOFC-Trigeneration system has the highest electrical efficiency among the three systems. Alternatively, when Trigeneration is used, the efficiencies of all three systems considered increase considerably. The maximum Trigeneration efficiency of the SOFC-Trigeneration system is around 76% while it is around 90% for the biomass-Trigeneration system. On the other hand, the maximum Trigeneration efficiencies of the solar-Trigeneration system is around 90% for the solar mode, 45% for storage and storage mode, and 41% for the storage mode. In addition, this study shows that the emissions of CO2 in kg per MWh of electrical power are high for the biomass-Trigeneration and SOFC-Trigeneration systems. However, by considering the emissions per MWh of Trigeneration, their values drop to less than one fourth.
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exergy modeling of a new solar driven Trigeneration system
Solar Energy, 2011Co-Authors: Ibrahim Dincer, Fahad A Alsulaiman, Feridun HamdullahpurAbstract:Abstract In this paper, exergy modeling is used to assess the exergetic performance of a novel Trigeneration system using parabolic trough solar collectors (PTSC) and an organic Rankine cycle (ORC). Four cases are considered: electrical-power, cooling-cogeneration, heating-cogeneration, and Trigeneration. In this Trigeneration system a single-effect absorption chiller is utilized to provide the necessary cooling energy and a heat exchanger is utilized to provide the necessary heating energy. The Trigeneration system considered is examined using three modes of operation. They are: solar mode during the low-solar radiation time of the day, solar and storage mode during the high-solar radiation time of the day, and storage mode during night time. The storage mode is operated through the heat collected in a thermal storage tank during the solar and storage mode. The exergy efficiencies and exergy destruction rates are examined under the variation of the ORC evaporator pinch point temperature, ORC pump inlet temperature, and turbine inlet pressure. This study reveals that the maximum electrical-exergy efficiency for the solar mode is 7%, for the solar and storage mode is 3.5%, and for the storage mode is 3%. Alternatively, when Trigeneration is used, the exergy efficiency increases noticeably. The maximum Trigeneration-exergy efficiency for the solar mode is 20%, for solar and storage mode is 8%, and for the storage mode is 7%. Moreover, this study shows that the main sources of exergy destruction rate are the solar collectors and ORC evaporators. Therefore, careful selection and design of these two components are essential to reduce the exergy destructed by them and, thus, increase the exergy efficiencies of the system.
Marc A. Rosen - One of the best experts on this subject based on the ideXlab platform.
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greenhouse gas emission and exergy analyses of an integrated Trigeneration system driven by a solid oxide fuel cell
Applied Thermal Engineering, 2015Co-Authors: Ata Chitsaz, Mohammad S S Mahmoudi, Marc A. RosenAbstract:Abstract Exergy and greenhouse gas emission analyses are performed for a novel Trigeneration system driven by a solid oxide fuel cell (SOFC). The Trigeneration system also consists of a generator-absorber heat exchanger (GAX) absorption refrigeration system and a heat exchanger to produce electrical energy, cooling and heating, respectively. Four operating cases are considered: electrical power generation, electrical power and cooling cogeneration, electrical power and heating cogeneration, and Trigeneration. Attention is paid to numerous system and environmental performance parameters, namely, exergy efficiency, exergy destruction rate, and greenhouse gas emissions. A maximum enhancement of 46% is achieved in the exergy efficiency when the SOFC is used as the primary mover for the Trigeneration system compared to the case when the SOFC is used as a standalone unit. The main sources of irreversibility are observed to be the air heat exchanger, the SOFC and the afterburner. The unit CO 2 emission (in kg/MWh) is considerably higher for the case in which only electrical power is generated. This parameter is reduced by half when the system is operates in a Trigeneration mode.
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energy and exergy assessments of a novel Trigeneration system based on a solid oxide fuel cell
Energy Conversion and Management, 2014Co-Authors: Faramarz Ranjbar, Ata Chitsaz, S M S Mahmoudi, Shahram Khalilarya, Marc A. RosenAbstract:Energy and exergy assessments are reported of a novel Trigeneration system based on a solid oxide fuel cell (SOFC), for steady-state operation and using a zero-dimensional approach. The Trigeneration system also includes a generator-absorber heat exchanger for cooling and a heat exchanger for the heating process. The influences of two significant SOFC parameters (current density and inlet flow temperature) on several variables are investigated. The results show that the energy efficiency is a minimum of 33% higher when using the Trigeneration system compared with the SOFC power cycle. In addition, the maximum energy efficiencies are found to be 79% for the Trigeneration system, 69% for the heating cogeneration, 58% for cooling cogeneration and 46% for electricity production. Moreover, the highest Trigeneration exergy efficiency is almost 47% under the given conditions. It is also shown that, as SOFC current density increases, the exergy efficiencies decrease for the power cycle, cooling cogeneration, heating cogeneration and Trigeneration. As current density increases, the Trigeneration energy and exergy efficiencies decrease, and an optimal current density is observed to exist at which the net electrical power is a maximum. As SOFC inlet flow temperature increases, the Trigeneration energy and exergy efficiencies and net electrical power increase to a peak and then decrease. The main exergy destructions occur in the air heat exchanger, the SOFC and the afterburner.
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exergo environmental analysis of an integrated organic rankine cycle for Trigeneration
Energy Conversion and Management, 2012Co-Authors: Pouria Ahmadi, Ibrahim Dincer, Marc A. RosenAbstract:A comprehensive thermodynamic modelling is reported of a Trigeneration system for cooling, heating (and/or hot water) and electricity generation. This Trigeneration system consists of a gas turbine cycle, an organic Rankine cycle (ORC), a single-effect absorption chiller and a domestic water heater. Energy and exergy analyses, environmental impact assessments and related parametric studies are carried out, and parameters that measure environmental impact and sustainability are evaluated. The exergy efficiency of the Trigeneration system is found to be higher than that of typical combined heat and power systems or gas turbine cycles. The results also indicate that carbon dioxide emissions for the Trigeneration system are less than for the aforementioned systems. The exergy results show that combustion chamber has the largest exergy destruction of the cycle components, due to the irreversible nature of its chemical reactions and the high temperature difference between the working fluid and flame temperature. The parametric investigations show that the compressor pressure ratio, the gas turbine inlet temperature and the gas turbine isentropic efficiency significantly affect the exergy efficiency and environmental impact of the Trigeneration system. Also, increasing the turbine inlet temperature decreases the cost of environmental impact, primarily by reducing the combustion chamber mass flow rate.
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Exergo-environmental analysis of an integrated organic Rankine cycle for Trigeneration
Energy Conversion and Management, 2012Co-Authors: Ibrahim Dincer, Marc A. RosenAbstract:A comprehensive thermodynamic modelling is reported of a Trigeneration system for cooling, heating (and/or hot water) and electricity generation. This Trigeneration system consists of a gas turbine cycle, an organic Rankine cycle (ORC), a single-effect absorption chiller and a domestic water heater. Energy and exergy analyses, environmental impact assessments and related parametric studies are carried out, and parameters that measure environmental impact and sustainability are evaluated. The exergy efficiency of the Trigeneration system is found to be higher than that of typical combined heat and power systems or gas turbine cycles. The results also indicate that carbon dioxide emissions for the Trigeneration system are less than for the aforementioned systems. The exergy results show that combustion chamber has the largest exergy destruction of the cycle components, due to the irreversible nature of its chemical reactions and the high temperature difference between the working fluid and flame temperature. The parametric investigations show that the compressor pressure ratio, the gas turbine inlet temperature and the gas turbine isentropic efficiency significantly affect the exergy efficiency and environmental impact of the Trigeneration system. Also, increasing the turbine inlet temperature decreases the cost of environmental impact, primarily by reducing the combustion chamber mass flow rate. © 2012 Elsevier Ltd. All rights reserved.
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Greenhouse gas emission and exergo-environmental analyses of a Trigeneration energy system
International Journal of Greenhouse Gas Control, 2011Co-Authors: Marc A. Rosen, Ibrahim DincerAbstract:A comprehensive thermodynamic modeling is reported of a Trigeneration system for cooling, heating and electricity purposes. This Trigeneration system consists of a gas turbine cycle, a steam turbine cycle and a single-effect absorption chiller. Energy and exergy analyses, environmental impact assessments and related parametric studies are carried out, and parameters that measure environmental impact and sustainability are evaluated. The exergy efficiency of the Trigeneration system is found to be higher than that for typical combined heat and power systems or gas turbine cycles. The results also indicate that the carbon dioxide emissions for the Trigeneration system are less than those for the compared systems. The parametric investigations show that compressor pressure ratio, the gas turbine inlet temperature, the gas turbine isentropic efficiency and the heat recovery steam generator pressure significantly affect the exergy efficiency and environmental impact of the Trigeneration system. The results also show that compressor pressure ratio and turbine inlet temperature decreases the cost of environmental impact, primarily by reducing the combustion chamber mass flow rate. The evaluation of the exergy efficiency, exergy destruction, carbon dioxide emission and cost of environmental impacts for each case and the overall cycle demonstrate that the combustion chamber has the highest exergy destruction of all system components, due to the high temperature difference between the working fluid and the flame temperature. © 2011.
Alberto Coronas - One of the best experts on this subject based on the ideXlab platform.
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Performance analysis of a Trigeneration system based on a micro gas turbine and an air-cooled, indirect fired, ammonia–water absorption chiller
Applied Energy, 2011Co-Authors: M Moya, J C Bruno, Inmaculada Zamora, E. Torres, Pablo Eguia, Alberto CoronasAbstract:The objective of this paper is to experimentally determine the efficiency and viability of the performance of an advanced Trigeneration system that consists of a micro gas turbine in which the exhaust gases heat hot thermal oil to produce cooling with an air cooled absorption chiller and hot water for heating and DHW. The micro gas turbine with a net power of 28kW produces around 60kW of heat to drive an ammonia/water air-cooled absorption chiller with a rated capacity of 17kW. The Trigeneration system was tested in different operating conditions by varying the output power of the micro gas turbine, the ambient temperature for the absorption unit, the chilled water outlet temperature and the thermal oil inlet temperature. The modelling performance of the Trigeneration system and the electrical modelling of the micro gas turbine are presented and compared with experimental results. Finally, the primary energy saving and the economic analysis show the advantages and drawbacks of this Trigeneration configuration.
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performance analysis of a Trigeneration system based on a micro gas turbine and an air cooled indirect fired ammonia water absorption chiller
Applied Energy, 2011Co-Authors: M Moya, J C Bruno, Inmaculada Zamora, E. Torres, Pablo Eguia, Alberto CoronasAbstract:The objective of this paper is to experimentally determine the efficiency and viability of the performance of an advanced Trigeneration system that consists of a micro gas turbine in which the exhaust gases heat hot thermal oil to produce cooling with an air cooled absorption chiller and hot water for heating and DHW. The micro gas turbine with a net power of 28kW produces around 60kW of heat to drive an ammonia/water air-cooled absorption chiller with a rated capacity of 17kW. The Trigeneration system was tested in different operating conditions by varying the output power of the micro gas turbine, the ambient temperature for the absorption unit, the chilled water outlet temperature and the thermal oil inlet temperature. The modelling performance of the Trigeneration system and the electrical modelling of the micro gas turbine are presented and compared with experimental results. Finally, the primary energy saving and the economic analysis show the advantages and drawbacks of this Trigeneration configuration.
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integration of Trigeneration in an indirect cascade refrigeration system in supermarkets
Energy and Buildings, 2011Co-Authors: M A Marimon, J C Bruno, J Arias, Per Lundqvist, Alberto CoronasAbstract:This article presents an energy and economic analysis of a Trigeneration configuration for supermarket applications. The energy system in a supermarket is relatively complex, because it includes lighting, air conditioning, cabinets, refrigeration system, etc. A Trigeneration system could be used to simultaneously satisfy heating, refrigeration and electricity demands in supermarkets. More specifically, this article studies the integration of a Trigeneration system and an indirect refrigeration cascade compression system in a supermarket in Barcelona. The Trigeneration system consists of a cogeneration engine and an ammonia/water absorption chiller unit. The results of simulating energy usage, life cycle costs and CO2 emissions have been compared with a conventional indirect refrigeration cascade compression system for the supermarket studied. Several Trigeneration configurations have been studied. They all show a payback time of less than 6 years but the profitability of the investment depends strongly on the ratio between the prices of natural gas and electricity. This study shows that this novel Trigeneration system is economically feasible and environmentally more viable than conventional supermarket systems.
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Integration of Trigeneration in an indirect cascade refrigeration system in supermarkets
Energy and Buildings, 2011Co-Authors: M. A. Marim??n, Pernille Lundqvist, Joan Carles Bruno, J Arias, Alberto CoronasAbstract:This article presents an energy and economic analysis of a Trigeneration configuration for supermarket applications. The energy system in a supermarket is relatively complex, because it includes lighting, air conditioning, cabinets, refrigeration system, etc. A Trigeneration system could be used to simultaneously satisfy heating, refrigeration and electricity demands in supermarkets. More specifically, this article studies the integration of a Trigeneration system and an indirect refrigeration cascade compression system in a supermarket in Barcelona. The Trigeneration system consists of a cogeneration engine and an ammonia/water absorption chiller unit. The results of simulating energy usage, life cycle costs and CO2 emissions have been compared with a conventional indirect refrigeration cascade compression system for the supermarket studied. Several Trigeneration configurations have been studied. They all show a payback time of less than 6 years but the profitability of the investment depends strongly on the ratio between the prices of natural gas and electricity. This study shows that this novel Trigeneration system is economically feasible and environmentally more viable than conventional supermarket systems. ?? 2011 Elsevier B.V.
