The Experts below are selected from a list of 6513 Experts worldwide ranked by ideXlab platform
Aristide F Massardo - One of the best experts on this subject based on the ideXlab platform.
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optimal design of compact recuperators for microturbine application
Applied Thermal Engineering, 2005Co-Authors: Alberto Traverso, Aristide F MassardoAbstract:Abstract This paper presents a new approach for the optimization of microturbine recuperators from the technical and economic standpoints. The Procedure proposed has been implemented in the software called CHEOPE (compact heat exchanger optimization and performance evaluation), which considers two types of recuperator concept, which have proved to be the most promising for microturbine applications: the furnace-brazed plate-fin type and the welded primary surface type. The general design rules for performance evaluation of gas–gas heat exchangers are summarized and specifically applied to these two types of recuperator. Moreover, the cost equation, employed to estimate the capital cost of these types of heat exchanger, is discussed. With regard to the Sizing Procedure, a special optimization Procedure of the recuperator matrix has been developed, which takes into account several targets in a single multi-objective function: the compactness, the pressure drops and the expected cost of the device. The tests performed for the validation are presented, and three case studies are illustrated for three different microturbine sizes, for a 50 kW, 100 kW and 500 kW machine, respectively.
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optimal design of compact recuperators for microturbine application
Applied Thermal Engineering, 2005Co-Authors: Alberto Traverso, Aristide F MassardoAbstract:Abstract This paper presents a new approach for the optimization of microturbine recuperators from the technical and economic standpoints. The Procedure proposed has been implemented in the software called CHEOPE (compact heat exchanger optimization and performance evaluation), which considers two types of recuperator concept, which have proved to be the most promising for microturbine applications: the furnace-brazed plate-fin type and the welded primary surface type. The general design rules for performance evaluation of gas–gas heat exchangers are summarized and specifically applied to these two types of recuperator. Moreover, the cost equation, employed to estimate the capital cost of these types of heat exchanger, is discussed. With regard to the Sizing Procedure, a special optimization Procedure of the recuperator matrix has been developed, which takes into account several targets in a single multi-objective function: the compactness, the pressure drops and the expected cost of the device. The tests performed for the validation are presented, and three case studies are illustrated for three different microturbine sizes, for a 50 kW, 100 kW and 500 kW machine, respectively.
Ilan Aharon - One of the best experts on this subject based on the ideXlab platform.
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Sizing Procedure for system hybridization based on experimental source modeling for electric vehicles
Energies, 2021Co-Authors: Aaron Shmaryahu, Nissim Amar, Alexander Ivanov, Ilan AharonAbstract:Hybrid vehicles are now more common in response to increasing global warming. The hybridization of energy sources and energy storage units enables improving the sustainability, reliability, and robustness of power systems. To reach the objective of zero emissions, a proton exchange membrane hydrogen fuel-cell was utilized as an energy source. The aim of this research was to create an accurate optimal Sizing Procedure for determining the nominal rating of the necessary sources. We modeled the fuel cell and the battery pack using data from real experimental results to create the generic database. Then, we added data on the mission profile, system constraints, and the minimization target function. The mission profile was then analyzed by the Sizing algorithm to determine optional minimum and maximum fuel cell ratings. Analyzing the optional solutions using the vehicle real time energy management system controller resulted in a set of solutions for each available rated fuel cell, and the optimal compatible battery in the revealed band successfully accomplished the route of the driving cycle within the system limitations. Finally, the Pareto curve represented the optimal finding of the Sizing Procedure. Ultimately, in contrast to previous works that utilize gross manufacturer data in the Sizing Procedure, the main research contribution and novelty of this research is the very accurate Sizing results, which draw on real experimental-based fuel-cell and battery Sizing models. Moreover, the actual vehicle real time energy management system controllers were used in the Sizing Procedure.
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Sizing Procedure for system hybridization based on experimental source modeling in grid application
Energies, 2021Co-Authors: Nissim Amar, Aaron Shmaryahu, Michael Coletti, Ilan AharonAbstract:Hybridization of sources is spreading worldwide by utilizing renewable sources and storage units as standard parts of every grid. The conjunction of energy source and storage type open the door to reshaping the sustainability and robustness of the mains while improving system parameters such as efficiency and fuel consumption. The solution fits existing networks as well as new ones. The study proposes the creation of an accurate optimal Sizing Procedure for setting the required rating of each type of source. The first step is to model the storage and energy sources by using real experimental results for creating the generic database. Then, data on the mission profile, system constraints, and the minimization target function are inserted. The mission profile is then analyzed to determine the minimum and maximum energy source rating. Next, the real time energy management system controller is used to find the set of solutions for each available energy source and the optimal compatible storage in the revealed band to fulfil the mission task. A Pareto-curve is then plotted to present the optimal findings of the Sizing Procedure. Ultimately, the main research contribution is the far more accurate Sizing results. A case study shows that relying on the standard method leads to noncompliance of Sizing constraints, while the proposed Procedure leads to fulfilling the mission successfully. First, by utilizing experimentally based energy and a storage unit. Second, by using the same real time energy management system controller in the Sizing Procedure.
Alberto Traverso - One of the best experts on this subject based on the ideXlab platform.
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optimal design of compact recuperators for microturbine application
Applied Thermal Engineering, 2005Co-Authors: Alberto Traverso, Aristide F MassardoAbstract:Abstract This paper presents a new approach for the optimization of microturbine recuperators from the technical and economic standpoints. The Procedure proposed has been implemented in the software called CHEOPE (compact heat exchanger optimization and performance evaluation), which considers two types of recuperator concept, which have proved to be the most promising for microturbine applications: the furnace-brazed plate-fin type and the welded primary surface type. The general design rules for performance evaluation of gas–gas heat exchangers are summarized and specifically applied to these two types of recuperator. Moreover, the cost equation, employed to estimate the capital cost of these types of heat exchanger, is discussed. With regard to the Sizing Procedure, a special optimization Procedure of the recuperator matrix has been developed, which takes into account several targets in a single multi-objective function: the compactness, the pressure drops and the expected cost of the device. The tests performed for the validation are presented, and three case studies are illustrated for three different microturbine sizes, for a 50 kW, 100 kW and 500 kW machine, respectively.
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optimal design of compact recuperators for microturbine application
Applied Thermal Engineering, 2005Co-Authors: Alberto Traverso, Aristide F MassardoAbstract:Abstract This paper presents a new approach for the optimization of microturbine recuperators from the technical and economic standpoints. The Procedure proposed has been implemented in the software called CHEOPE (compact heat exchanger optimization and performance evaluation), which considers two types of recuperator concept, which have proved to be the most promising for microturbine applications: the furnace-brazed plate-fin type and the welded primary surface type. The general design rules for performance evaluation of gas–gas heat exchangers are summarized and specifically applied to these two types of recuperator. Moreover, the cost equation, employed to estimate the capital cost of these types of heat exchanger, is discussed. With regard to the Sizing Procedure, a special optimization Procedure of the recuperator matrix has been developed, which takes into account several targets in a single multi-objective function: the compactness, the pressure drops and the expected cost of the device. The tests performed for the validation are presented, and three case studies are illustrated for three different microturbine sizes, for a 50 kW, 100 kW and 500 kW machine, respectively.
R K Bird - One of the best experts on this subject based on the ideXlab platform.
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development of advanced metallic thermal protection system prototype hardware
Journal of Spacecraft and Rockets, 2004Co-Authors: Max L Blosser, Carl C Poteet, Roger R Chen, John T Dorsey, I H Schmidt, R K Bird, Kathryn E WursterAbstract:A new metallic thermal-protection-system concept has been designed, analyzed, and fabricated. A specific location on a slngle-stage-to-orbit reusable launch vehicle was selected to develop loads and requirements needed todesign prototype panels. The design loads include ascent and entry heating rates, pressures, acoustics, and accelerations. Additional design issues were identified and discussed. An iterative Sizing Procedure was used to size the thermal protection system panels for thermal and structural loads as part of an integrated wall construction that included the thermal protection system and cryogenic tank structure. The panels were sized to maintain acceptable temperatures on the underlying structure and to operate under the design structural loading. Detailed creep analyses were also performed on critical components of the panels. Four 18-in.-square metallic thermal-protection-system panels were fabricated. A lightweight, thermally compliant support system to connect the thermal protection system to the cryogenic tank structure was designed and fabricated.
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advanced metallic thermal protection system development
40th AIAA Aerospace Sciences Meeting & Exhibit, 2002Co-Authors: Max L Blosser, Carl C Poteet, Roger R Chen, John T Dorsey, I H Schmidt, R K BirdAbstract:A new Adaptable, Robust, Metallic, Operable, Reusable (ARMOR) thermal protection system (TPS) concept has been designed, analyzed, and fabricated. In addition to the inherent tailorable robustness of metallic TPS, ARMOR TPS offers improved features based on lessons learned from previous metallic TPS development efforts. A specific location on a single-stage-to-orbit reusable launch vehicle was selected to develop loads and requirements needed to design prototype ARMOR TPS panels. The design loads include ascent and entry heating rate histories, pressures, acoustics, and accelerations. Additional TPS design issues were identified and discussed. An iterative Sizing Procedure was used to size the ARMOR TPS panels for thermal and structural loads as part of an integrated TPS/cryogenic tank structural wall. The TPS panels were sized to maintain acceptable temperatures on the underlying structure and to operate under the design structural loading. Detailed creep analyses were also performed on critical components of the ARMOR TPS panels. A lightweight, thermally compliant TPS support system (TPSS) was designed to connect the TPS to the cryogenic tank structure. Four 18-inch-square ARMOR TPS panels were fabricated. Details of the fabrication process are presented. Details of the TPSS for connecting the ARMOR TPS panels to the externally stiffened cryogenic tank structure are also described. Test plans for the fabricated hardware are presented.
Aaron Shmaryahu - One of the best experts on this subject based on the ideXlab platform.
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Sizing Procedure for system hybridization based on experimental source modeling for electric vehicles
Energies, 2021Co-Authors: Aaron Shmaryahu, Nissim Amar, Alexander Ivanov, Ilan AharonAbstract:Hybrid vehicles are now more common in response to increasing global warming. The hybridization of energy sources and energy storage units enables improving the sustainability, reliability, and robustness of power systems. To reach the objective of zero emissions, a proton exchange membrane hydrogen fuel-cell was utilized as an energy source. The aim of this research was to create an accurate optimal Sizing Procedure for determining the nominal rating of the necessary sources. We modeled the fuel cell and the battery pack using data from real experimental results to create the generic database. Then, we added data on the mission profile, system constraints, and the minimization target function. The mission profile was then analyzed by the Sizing algorithm to determine optional minimum and maximum fuel cell ratings. Analyzing the optional solutions using the vehicle real time energy management system controller resulted in a set of solutions for each available rated fuel cell, and the optimal compatible battery in the revealed band successfully accomplished the route of the driving cycle within the system limitations. Finally, the Pareto curve represented the optimal finding of the Sizing Procedure. Ultimately, in contrast to previous works that utilize gross manufacturer data in the Sizing Procedure, the main research contribution and novelty of this research is the very accurate Sizing results, which draw on real experimental-based fuel-cell and battery Sizing models. Moreover, the actual vehicle real time energy management system controllers were used in the Sizing Procedure.
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Sizing Procedure for system hybridization based on experimental source modeling in grid application
Energies, 2021Co-Authors: Nissim Amar, Aaron Shmaryahu, Michael Coletti, Ilan AharonAbstract:Hybridization of sources is spreading worldwide by utilizing renewable sources and storage units as standard parts of every grid. The conjunction of energy source and storage type open the door to reshaping the sustainability and robustness of the mains while improving system parameters such as efficiency and fuel consumption. The solution fits existing networks as well as new ones. The study proposes the creation of an accurate optimal Sizing Procedure for setting the required rating of each type of source. The first step is to model the storage and energy sources by using real experimental results for creating the generic database. Then, data on the mission profile, system constraints, and the minimization target function are inserted. The mission profile is then analyzed to determine the minimum and maximum energy source rating. Next, the real time energy management system controller is used to find the set of solutions for each available energy source and the optimal compatible storage in the revealed band to fulfil the mission task. A Pareto-curve is then plotted to present the optimal findings of the Sizing Procedure. Ultimately, the main research contribution is the far more accurate Sizing results. A case study shows that relying on the standard method leads to noncompliance of Sizing constraints, while the proposed Procedure leads to fulfilling the mission successfully. First, by utilizing experimentally based energy and a storage unit. Second, by using the same real time energy management system controller in the Sizing Procedure.
