The Experts below are selected from a list of 2994 Experts worldwide ranked by ideXlab platform
Fei Gao - One of the best experts on this subject based on the ideXlab platform.
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study of the Modeling parameter effects on the polarization characteristics of the pem Fuel Cell
International Journal of Hydrogen Energy, 2016Co-Authors: Dongdong Zhao, Fei Gao, Manfeng Dou, Daming ZhouAbstract:Abstract The polarization characteristic (V I curve) describes the basic working performance of proton exchange membrane (PEM) Fuel Cell. The variations of internal parameters including physical and empirical ones have great impact on the polarization characteristic. This paper investigates the parametric variations effect on the Fuel Cell voltage during the full range current. Some important parameters in the electrochemical domain and fluidic domain are selected and their influences on the mass transfer and electrochemical reaction are studied. The analytic results show that the positive- and negative-deviations of the selected parameters have very different effect on the Cell voltage. Multi-parameter sensitivity analysis (MPSA) based on Monte-Carlo method is used to identify the sensitivity index of each parameter. The study results could provide a guidance for the parameter identification during the Fuel Cell Modeling or manufacturing.
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Study of the Modeling parameter effects on the polarization characteristics of the PEM Fuel Cell
International Journal of Hydrogen Energy, 2016Co-Authors: Dongdong Zhao, Manfeng Dou, Daming Zhou, Fei GaoAbstract:The polarization characteristic (Vsingle bondI curve) describes the basic working performance of proton exchange membrane (PEM) Fuel Cell. The variations of internal parameters including physical and empirical ones have great impact on the polarization characteristic. This paper investigates the parametric variations effect on the Fuel Cell voltage during the full range current. Some important parameters in the electrochemical domain and fluidic domain are selected and their influences on the mass transfer and electrochemical reaction are studied. The analytic results show that the positive- and negative-deviations of the selected parameters have very different effect on the Cell voltage. Multi-parameter sensitivity analysis (MPSA) based on Monte-Carlo method is used to identify the sensitivity index of each parameter. The study results could provide a guidance for the parameter identification during the Fuel Cell Modeling or manufacturing.
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Methanol Fuel processor and PEM Fuel Cell Modeling for mobile application
International Journal of Hydrogen Energy, 2010Co-Authors: Daniela Chrenko, Fei Gao, Benjamin Blunier, David Bouquain, Abdellatif MiraouiAbstract:The use of hydrocarbon fed Fuel Cell systems including a Fuel processor can be an entry market for this emerging technology avoiding the problem of hydrogen infrastructure. This article presents a 1 kW low temperature PEM Fuel Cell system with Fuel processor, the system is Fueled by a mixture of methanol and water that is converted into hydrogen rich gas using a steam reformer. A complete system model including a fluidic Fuel processor model containing evaporation, steam reformer, hydrogen filter, combustion, as well as a multi-domain Fuel Cell model is introduced. Experiments are performed with an IDATECH FCS1200™ Fuel Cell system. The results of Modeling and experimentation show good results, namely with regard to Fuel Cell current and voltage as well as hydrogen production and pressure. The system is auto sufficient and shows an efficiency of 25.12%. The presented work is a step towards a complete system model, needed to develop a well adapted system control assuring optimized system efficiency.
Norman Munroe - One of the best experts on this subject based on the ideXlab platform.
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Semi-analytical proton exchange membrane Fuel Cell Modeling
Journal of Power Sources, 2008Co-Authors: Denver Cheddie, Norman MunroeAbstract:Abstract Mathematical techniques are presented which allow for analytical solutions of the catalyst layer transport and electrochemical problem in PEM Fuel Cells. These techniques transform the volumetric reaction terms to boundary flux terms, thereby eliminating the need for computational solving of the catalyst layer problem. The result is a semi-analytical Fuel Cell model—a computational model that entails analytical rather than computational catalyst layer solutions. This helps to alleviate the meshing difficulties inherent in the catalyst layers caused by large geometric aspect ratios, and hence reduce the computational requirements for Fuel Cell models. These analytical solutions are implemented in a 3D PEM Fuel Cell model, and the results of the semi-analytical model match well with the full computational model in terms of the polarization performance and species concentration distribution. In addition, these analytical solutions were able to reduce the required computational memory by a factor of approximately 3, and the computational time by a factor of approximately 4.
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review and comparison of approaches to proton exchange membrane Fuel Cell Modeling
Journal of Power Sources, 2005Co-Authors: Denver F Cheddie, Norman MunroeAbstract:A review of recent literature on proton exchange membrane Fuel Cell Modeling is presented. Fuel Cell models can be categorized as analytical, semi-empirical or mechanistic. Mechanistic models can be further subcategorized based on the solution strategy, single-domain or multi-domain. The multi-domain approach develops and solves separate equations in each region of the Fuel Cell. The single-domain approach consists of equations governing the entire domain of interest, with source and sink terms accounting for species consumption and generation within the Cell. The merits and demerits of each method are discussed. For a one-dimensional case study, both methods were compared quantitatively and results show that both models accurately predict the polarization effects and water management requirements.
Qiangu Yan - One of the best experts on this subject based on the ideXlab platform.
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investigation of water transport through membrane in a pem Fuel Cell by water balance experiments
Journal of Power Sources, 2006Co-Authors: Qiangu Yan, Hossein ToghianiAbstract:Abstract Water balance in a polymer electrolyte membrane Fuel Cell (PEMFC) was investigated by measurements of the net drag coefficient under various conditions. The effects of water balance in the PEMFC on the Cell performance were also investigated at different operating conditions. Experimental results reveal that the net drag coefficient of water through the membrane depended on current density and humidification of feed gases. It was found that the net drag coefficient (net number of water molecules transported per proton) ranged from −0.02 to 0.93, and was dependent on the operating conditions, the current load and the level of humidification. It was also found that the humidity of both anode and cathode inlet gases had a significant effect on the Fuel Cell performance. The resistance of the working Fuel Cell showed that the membrane resistance increased as the feed gas relative humidity (RH) decreased. The diffusion of water across Nafion membranes was also investigated by experimental water flux measurements. The electro-osmotic drag coefficient was evaluated from the experimental results of water balance and diffusion water flux measurements. The value of electro-osmotic drag coefficient, ranging from 1.5 to 2.6 under various operating conditions, was in agreement with literature values. The electro-osmotic drag coefficient, the net flux of water through the membrane and the effective drag as a function of operating conditions will also provide validation data for the Fuel Cell Modeling and simulation efforts.
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investigation of water transport through membrane in a pem Fuel Cell by water balance experiments
Journal of Power Sources, 2006Co-Authors: Qiangu Yan, Hossein Toghiani, Junxiao WuAbstract:Abstract Water balance in a polymer electrolyte membrane Fuel Cell (PEMFC) was investigated by measurements of the net drag coefficient under various conditions. The effects of water balance in the PEMFC on the Cell performance were also investigated at different operating conditions. Experimental results reveal that the net drag coefficient of water through the membrane depended on current density and humidification of feed gases. It was found that the net drag coefficient (net number of water molecules transported per proton) ranged from −0.02 to 0.93, and was dependent on the operating conditions, the current load and the level of humidification. It was also found that the humidity of both anode and cathode inlet gases had a significant effect on the Fuel Cell performance. The resistance of the working Fuel Cell showed that the membrane resistance increased as the feed gas relative humidity (RH) decreased. The diffusion of water across Nafion membranes was also investigated by experimental water flux measurements. The electro-osmotic drag coefficient was evaluated from the experimental results of water balance and diffusion water flux measurements. The value of electro-osmotic drag coefficient, ranging from 1.5 to 2.6 under various operating conditions, was in agreement with literature values. The electro-osmotic drag coefficient, the net flux of water through the membrane and the effective drag as a function of operating conditions will also provide validation data for the Fuel Cell Modeling and simulation efforts.
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Water Balance Experiments in PEM Fuel Cell for Measurements of Water Transport Properties Through Membrane
3rd International Conference on Fuel Cell Science Engineering and Technology, 2005Co-Authors: Qiangu Yan, Qingyun Liu, Junxiao WuAbstract:Water balance in a polymer electrolyte membrane Fuel Cell (PEMFC) was investigated by measurements of the net drag coefficient under various conditions. The effects of water balance in the PEM Fuel Cell on the Cell performance were also investigated at different operating conditions. Experimental results reveal that the net drag coefficient of water through the membrane depends on current density and humidification of feed gases. It is found that the net drag coefficient (net number of water molecules transported per proton) has values between 0.93 and −0.015 depending on operating condition, current loading and level of humidification. It was also found that the humidity of both anode and cathode inlet gases had significant effect on Fuel Cell performance. The results will be used to define conditions of optimal hydration of the membrane. Based on the performance and resistance measurements, optimal humidification can be achieved. The resistance of working Fuel Cell shows that the membrane resistance increases with the feed gas relative humidity (RH) decreased. Data obtained will be used to evaluate the transport parameters such as net flux of water through the membrane and the effective drag under various operating conditions, and further provide validation data for the Fuel Cell Modeling and simulation efforts.Copyright © 2005 by ASME
Hossein Toghiani - One of the best experts on this subject based on the ideXlab platform.
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investigation of water transport through membrane in a pem Fuel Cell by water balance experiments
Journal of Power Sources, 2006Co-Authors: Qiangu Yan, Hossein ToghianiAbstract:Abstract Water balance in a polymer electrolyte membrane Fuel Cell (PEMFC) was investigated by measurements of the net drag coefficient under various conditions. The effects of water balance in the PEMFC on the Cell performance were also investigated at different operating conditions. Experimental results reveal that the net drag coefficient of water through the membrane depended on current density and humidification of feed gases. It was found that the net drag coefficient (net number of water molecules transported per proton) ranged from −0.02 to 0.93, and was dependent on the operating conditions, the current load and the level of humidification. It was also found that the humidity of both anode and cathode inlet gases had a significant effect on the Fuel Cell performance. The resistance of the working Fuel Cell showed that the membrane resistance increased as the feed gas relative humidity (RH) decreased. The diffusion of water across Nafion membranes was also investigated by experimental water flux measurements. The electro-osmotic drag coefficient was evaluated from the experimental results of water balance and diffusion water flux measurements. The value of electro-osmotic drag coefficient, ranging from 1.5 to 2.6 under various operating conditions, was in agreement with literature values. The electro-osmotic drag coefficient, the net flux of water through the membrane and the effective drag as a function of operating conditions will also provide validation data for the Fuel Cell Modeling and simulation efforts.
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investigation of water transport through membrane in a pem Fuel Cell by water balance experiments
Journal of Power Sources, 2006Co-Authors: Qiangu Yan, Hossein Toghiani, Junxiao WuAbstract:Abstract Water balance in a polymer electrolyte membrane Fuel Cell (PEMFC) was investigated by measurements of the net drag coefficient under various conditions. The effects of water balance in the PEMFC on the Cell performance were also investigated at different operating conditions. Experimental results reveal that the net drag coefficient of water through the membrane depended on current density and humidification of feed gases. It was found that the net drag coefficient (net number of water molecules transported per proton) ranged from −0.02 to 0.93, and was dependent on the operating conditions, the current load and the level of humidification. It was also found that the humidity of both anode and cathode inlet gases had a significant effect on the Fuel Cell performance. The resistance of the working Fuel Cell showed that the membrane resistance increased as the feed gas relative humidity (RH) decreased. The diffusion of water across Nafion membranes was also investigated by experimental water flux measurements. The electro-osmotic drag coefficient was evaluated from the experimental results of water balance and diffusion water flux measurements. The value of electro-osmotic drag coefficient, ranging from 1.5 to 2.6 under various operating conditions, was in agreement with literature values. The electro-osmotic drag coefficient, the net flux of water through the membrane and the effective drag as a function of operating conditions will also provide validation data for the Fuel Cell Modeling and simulation efforts.
Junxiao Wu - One of the best experts on this subject based on the ideXlab platform.
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investigation of water transport through membrane in a pem Fuel Cell by water balance experiments
Journal of Power Sources, 2006Co-Authors: Qiangu Yan, Hossein Toghiani, Junxiao WuAbstract:Abstract Water balance in a polymer electrolyte membrane Fuel Cell (PEMFC) was investigated by measurements of the net drag coefficient under various conditions. The effects of water balance in the PEMFC on the Cell performance were also investigated at different operating conditions. Experimental results reveal that the net drag coefficient of water through the membrane depended on current density and humidification of feed gases. It was found that the net drag coefficient (net number of water molecules transported per proton) ranged from −0.02 to 0.93, and was dependent on the operating conditions, the current load and the level of humidification. It was also found that the humidity of both anode and cathode inlet gases had a significant effect on the Fuel Cell performance. The resistance of the working Fuel Cell showed that the membrane resistance increased as the feed gas relative humidity (RH) decreased. The diffusion of water across Nafion membranes was also investigated by experimental water flux measurements. The electro-osmotic drag coefficient was evaluated from the experimental results of water balance and diffusion water flux measurements. The value of electro-osmotic drag coefficient, ranging from 1.5 to 2.6 under various operating conditions, was in agreement with literature values. The electro-osmotic drag coefficient, the net flux of water through the membrane and the effective drag as a function of operating conditions will also provide validation data for the Fuel Cell Modeling and simulation efforts.
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Water Balance Experiments in PEM Fuel Cell for Measurements of Water Transport Properties Through Membrane
3rd International Conference on Fuel Cell Science Engineering and Technology, 2005Co-Authors: Qiangu Yan, Qingyun Liu, Junxiao WuAbstract:Water balance in a polymer electrolyte membrane Fuel Cell (PEMFC) was investigated by measurements of the net drag coefficient under various conditions. The effects of water balance in the PEM Fuel Cell on the Cell performance were also investigated at different operating conditions. Experimental results reveal that the net drag coefficient of water through the membrane depends on current density and humidification of feed gases. It is found that the net drag coefficient (net number of water molecules transported per proton) has values between 0.93 and −0.015 depending on operating condition, current loading and level of humidification. It was also found that the humidity of both anode and cathode inlet gases had significant effect on Fuel Cell performance. The results will be used to define conditions of optimal hydration of the membrane. Based on the performance and resistance measurements, optimal humidification can be achieved. The resistance of working Fuel Cell shows that the membrane resistance increases with the feed gas relative humidity (RH) decreased. Data obtained will be used to evaluate the transport parameters such as net flux of water through the membrane and the effective drag under various operating conditions, and further provide validation data for the Fuel Cell Modeling and simulation efforts.Copyright © 2005 by ASME
