The Experts below are selected from a list of 193437 Experts worldwide ranked by ideXlab platform
Francois Marechal - One of the best experts on this subject based on the ideXlab platform.
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Energy Integration study on a hybrid electric vehicle Energy system using process Integration techniques
Applied Thermal Engineering, 2015Co-Authors: Zlatina Dimitrova, Francois MarechalAbstract:The needs of efficiency improvement of the vehicle Energy systems require to find innovative solutions during the design process, integrating all vehicle services and Energy requirement on a vehicle system level. In this article the boundary of the Energy system are extended to the powertrain and the cabin and the requirements for mobility and comfort are integrated. The Energy balance of the internal combustion engine is done and discussed, according to its operating points. The Energy requirement for comfort in the cabin is also determined, according to the seasonal requirement for heating or cooling. In this article an Energy Integration methodology, using process Integration techniques is discussed and applied on the extended vehicle Energy system. The minimal Energy requirement is determined for different mobility and comfort situations. The Energy recovery potential of an organic Rankine cycle, with sensitivity of different working fluids, is assessed. The Energy Integration methodology is applied on a hybrid electric vehicle Energy system, and is studied for adapted dynamic profile, represented by characteristic clustered operating points. Multi-objective optimization is applied to define the optimal design of a hybrid electric powertrain and the optimal ICE size, from efficiency and cost point of view.
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Energy Integration on multi periods and multi usages for hybrid electric and thermal powertrains
Energy, 2015Co-Authors: Zlatina Dimitrova, Francois MarechalAbstract:Abstract The improvement of the efficiency of vehicle Energy systems promotes an active search to find innovative solutions during the design process. This requires more accurate modeling of complex systems, which offers new ways to improve the design efficiency of Energy systems. The vehicle is a highly dynamic system. The size and the efficiency of the convertors are dependent on the dynamic driving profile. In order to increase the Energy efficiency, using Energy Integration techniques, an adapted methodology is required to choose the best points for the integrated system design. The idea is to clusterize the dynamic profile on typical multi-periods of the vehicle use. The Energy system design is then optimized for these typical multi-periods. In this article a new methodology is applied on hybrid electric vehicles, in order to define the Energy integrated powertrain configuration of the vehicle. The Energy recovery potential of a single stage Organic Rankine Cycle for a thermal engine in combination with a hybrid electric powertrain is assessed for different drive cycles profiles and comfort situations. After the Energy Integration, a multi-objective optimization is applied to define the optimal design of a hybrid electric vehicle with a waste heat recovery system.
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thermodynamic analysis Energy Integration and flowsheet improvement of a methanol absorption acid gas removal process
Chemical engineering transactions, 2013Co-Authors: Manuele Gatti, Emanuele Martelli, Francois Marechal, Stefano ConsonniAbstract:This paper analyses the thermodynamic performance and proposes different Energy Integration schemes for a methanol absorption based acid gas removal process, namely the Rectisol® process specifically designed for the selective removal of H2S and CO2 from coal derived syngas. The study consists of three major tasks: 1. Calibrating the PC-SAFT equation of state for MEOH-CO2-H2S-H2-CO mixtures at conditions relevant for the Rectisol® process. 2. Evaluating the thermodynamic performances and optimising the Energy Integration of the "Reference" scheme by means of "heat-cascade" based optimisation methodology. 3. Identifying attractive process modifications on the basis of Process Integration principles.
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Energy Integration optimisation of chilled ammonia process for co2 capture
9th European Congress of Chemical Engineering, 2013Co-Authors: Laurence Tock, Francois MarechalAbstract:Within the global challenge of climate change mitigation, CO2 capture and storage is regarded as a potential option to reduce the CO2 emissions in power plants. The most common technology to capture CO2 is chemical absorption with amines, requiring however a significant amount of Energy for solvent regeneration and CO2 compression and therefore penalizing the performance of the electricity production. The Energy efficiency is reduced by up to 10%-points and the production costs increased by around one third. To reduce the Energy and cost penalty of CO2 capture, the recently developed chilled ammonia process is studied here as a promising alternative. It is focused especially on process Integration aspects to improve the competitiveness of power plants with CO2 capture. By applying process Integration techniques based on the pinch analysis concept, the process Energy requirement is identified and the maximal heat recovery and the optimal utility Integration are computed. The optimal process Integration is computed by solving the heat cascade model of the process. A detailed analysis of the Energy Integration results, in the form of composite curves expressed in Carnot axis, allows to identify the major exergy losses and to propose process modifications to reduce the losses and improve the performance. It appears that a refrigeration cycle using a water-ammonia mixture as a refrigerant can satisfy the cooling need with almost no exergy losses. It is highlighted that by improving the absorber and refrigeration Integration, the competiveness of an NGCC plant with 90% CO2 capture by chilled ammonia can be enhanced. The Energy efficiency can be increased from 47% to 52%, which leads to a production cost decrease of 15%.
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conceptual design of a thermo electrical Energy storage system based on heat Integration of thermodynamic cycles part a methodology and base case
Energy, 2012Co-Authors: Matteo Morandin, Francois Marechal, Mehmet Mercangoz, Florian BuchterAbstract:This paper analyses the thermodynamic performance and proposes different Energy Integration schemes for a methanol absorption based acid gas removal process, namely the Rectisol® process specifically designed for the selective removal of H2S and CO2 from coal derived syngas. The study consists of three major tasks: 1. Calibrating the PC-SAFT equation of state for MEOH-CO2-H2S-H2-CO mixtures at conditions relevant for the Rectisol® process. 2. Evaluating the thermodynamic performances and optimising the Energy Integration of the "Reference" scheme by means of "heat-cascade" based optimisation methodology. 3. Identifying attractive process modifications on the basis of Process Integration principles. © 2013, AIDIC Servizi S.r.l.
Cao Junwe - One of the best experts on this subject based on the ideXlab platform.
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Energy internet an infrastructure for cyber Energy Integration
Southern Power System Technology, 2014Co-Authors: Cao JunweAbstract:Energy is the material basis of human development. Energy Internet,which is considered as a possible solution of Energy sustainability,is becoming a hot research topic and mainstream technology. Discribing the definition and features of Energy internet,this paper proposes its basic architecture,and discusses the information and Energy infrastructure development by introducing WAN,LAN and infrastructure. The domestic and world-wide development of Energy internet is reviewed,and a solution of the infrastructure for cyber-Energy Integration is proposed with Energy routers. The typical application scenario of the Energy router is given to illustrate the cyber-Energy fusion.
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Energy internet an infrastructure for cyber Energy Integration
Southern Power System Technology, 2014Co-Authors: Cao JunweAbstract:Energy is the material basis of human development. Energy Internet,which is considered as a possible solution of Energy sustainability,is becoming a hot research topic and mainstream technology. Discribing the definition and features of Energy internet,this paper proposes its basic architecture,and discusses the information and Energy infrastructure development by introducing WAN,LAN and infrastructure. The domestic and world-wide development of Energy internet is reviewed,and a solution of the infrastructure for cyber-Energy Integration is proposed with Energy routers. The typical application scenario of the Energy router is given to illustrate the cyber-Energy fusion.
David B Richardson - One of the best experts on this subject based on the ideXlab platform.
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electric vehicles and the electric grid a review of modeling approaches impacts and renewable Energy Integration
Renewable & Sustainable Energy Reviews, 2013Co-Authors: David B RichardsonAbstract:Electric vehicles (EVs) and renewable Energy sources offer the potential to substantially decrease carbon emissions from both the transportation and power generation sectors of the economy. Mass adoption of EVs will have a number of impacts and benefits, including the ability to assist in the Integration of renewable Energy into existing electric grids. This paper reviews the current literature on EVs, the electric grid, and renewable Energy Integration. Key methods and assumptions of the literature are discussed. The economic, environmental and grid impacts of EVs are reviewed. Numerous studies assessing the ability of EVs to integrate renewable Energy sources are assessed; the literature indicates that EVs can significantly reduce the amount of excess renewable Energy produced in an electric system. Studies on wind–EV interaction are much more detailed than those on solar photovoltaics (PV) and EVs. The paper concludes with recommendations for future research.
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electric vehicles and the electric grid a review of modeling approaches impacts and renewable Energy Integration
Renewable & Sustainable Energy Reviews, 2013Co-Authors: David B RichardsonAbstract:Abstract Electric vehicles (EVs) and renewable Energy sources offer the potential to substantially decrease carbon emissions from both the transportation and power generation sectors of the economy. Mass adoption of EVs will have a number of impacts and benefits, including the ability to assist in the Integration of renewable Energy into existing electric grids. This paper reviews the current literature on EVs, the electric grid, and renewable Energy Integration. Key methods and assumptions of the literature are discussed. The economic, environmental and grid impacts of EVs are reviewed. Numerous studies assessing the ability of EVs to integrate renewable Energy sources are assessed; the literature indicates that EVs can significantly reduce the amount of excess renewable Energy produced in an electric system. Studies on wind–EV interaction are much more detailed than those on solar photovoltaics (PV) and EVs. The paper concludes with recommendations for future research.
Zlatina Dimitrova - One of the best experts on this subject based on the ideXlab platform.
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Energy Integration study on a hybrid electric vehicle Energy system using process Integration techniques
Applied Thermal Engineering, 2015Co-Authors: Zlatina Dimitrova, Francois MarechalAbstract:The needs of efficiency improvement of the vehicle Energy systems require to find innovative solutions during the design process, integrating all vehicle services and Energy requirement on a vehicle system level. In this article the boundary of the Energy system are extended to the powertrain and the cabin and the requirements for mobility and comfort are integrated. The Energy balance of the internal combustion engine is done and discussed, according to its operating points. The Energy requirement for comfort in the cabin is also determined, according to the seasonal requirement for heating or cooling. In this article an Energy Integration methodology, using process Integration techniques is discussed and applied on the extended vehicle Energy system. The minimal Energy requirement is determined for different mobility and comfort situations. The Energy recovery potential of an organic Rankine cycle, with sensitivity of different working fluids, is assessed. The Energy Integration methodology is applied on a hybrid electric vehicle Energy system, and is studied for adapted dynamic profile, represented by characteristic clustered operating points. Multi-objective optimization is applied to define the optimal design of a hybrid electric powertrain and the optimal ICE size, from efficiency and cost point of view.
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Energy Integration on multi periods and multi usages for hybrid electric and thermal powertrains
Energy, 2015Co-Authors: Zlatina Dimitrova, Francois MarechalAbstract:Abstract The improvement of the efficiency of vehicle Energy systems promotes an active search to find innovative solutions during the design process. This requires more accurate modeling of complex systems, which offers new ways to improve the design efficiency of Energy systems. The vehicle is a highly dynamic system. The size and the efficiency of the convertors are dependent on the dynamic driving profile. In order to increase the Energy efficiency, using Energy Integration techniques, an adapted methodology is required to choose the best points for the integrated system design. The idea is to clusterize the dynamic profile on typical multi-periods of the vehicle use. The Energy system design is then optimized for these typical multi-periods. In this article a new methodology is applied on hybrid electric vehicles, in order to define the Energy integrated powertrain configuration of the vehicle. The Energy recovery potential of a single stage Organic Rankine Cycle for a thermal engine in combination with a hybrid electric powertrain is assessed for different drive cycles profiles and comfort situations. After the Energy Integration, a multi-objective optimization is applied to define the optimal design of a hybrid electric vehicle with a waste heat recovery system.
Antonio Perejon - One of the best experts on this subject based on the ideXlab platform.
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the calcium looping technology for co2 capture on the important roles of Energy Integration and sorbent behavior
Applied Energy, 2016Co-Authors: Pilar Lisbona, Luis M Romeo, Antonio Perejon, Yolanda Lara, Ana Martinez, J M ValverdeAbstract:The Calcium Looping (CaL) technology, based on the multicyclic carbonation/calcination of CaO in gas–solid fluidized bed reactors at high temperature, has emerged in the last years as a potentially low cost technology for CO2 capture. In this manuscript a critical review is made on the important roles of Energy Integration and sorbent behavior in the process efficiency. Firstly, the strategies proposed to reduce the Energy demand by internal Integration are discussed as well as process modifications aimed at optimizing the overall efficiency by means of external Integration. The most important benefit of the high temperature CaL cycles is the possibility of using high temperature streams that could reduce significantly the Energy penalty associated to CO2 capture. The application of the CaL technology in precombustion capture systems and Energy Integration, and the coupling of the CaL technology with other industrial processes are also described. In particular, the CaL technology has a significant potential to be a feasible CO2 capture system for cement plants. A precise knowledge of the multicyclic CO2 capture behavior of the sorbent at the CaL conditions to be expected in practice is of great relevance in order to predict a realistic capture efficiency and Energy penalty from process simulations. The second part of this manuscript will be devoted to this issue. Particular emphasis is put on the behavior of natural limestone and dolomite, which would be the only practical choices for the technology to meet its main goal of reducing CO2 capture costs. Under CaL calcination conditions for CO2 capture (necessarily implying high CO2 concentration in the calciner), dolomite seems to be a better alternative to limestone as CaO precursor. The proposed techniques of recarbonation and thermal/mechanical pretreatments to reactivate the sorbent and accelerate calcination will be the final subjects of this review.