Bibliografías temáticas / Multi-Stack fuel cells

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Literatura académica sobre el tema "Multi-Stack fuel cells"

Autor: Grafiati

Publicado: 25 de mayo de 2024

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Artículos de revistas sobre el tema "Multi-Stack fuel cells"

Becherif, Mohamed, Frederic Claude, Thomas Hervier y Loïc Boulon. "Multi-stack Fuel Cells Powering a Vehicle". Energy Procedia 74 (agosto de 2015): 308–19. http://dx.doi.org/10.1016/j.egypro.2015.07.613.

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Xiong, Shusheng, Zhankuan Wu, Wei Li, Daize Li, Teng Zhang, Yu Lan, Xiaoxuan Zhang et al. "Improvement of Temperature and Humidity Control of Proton Exchange Membrane Fuel Cells". Sustainability 13, n.º 19 (24 de septiembre de 2021): 10578. http://dx.doi.org/10.3390/su131910578.

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Temperature and humidity are two important interconnected factors in the performance of PEMFCs (Proton Exchange Membrane Fuel Cells). The fuel and oxidant humidity and stack temperature in a fuel cell were analyzed in this study. There are many factors that affect the temperature and humidity of the stack. We adopt the fuzzy control method of multi-input and multi-output to control the temperature and humidity of the stack. A model including a driver, vehicle, transmission motor, air feeding, electrical network, stack, hydrogen supply and cooling system was established to study the fuel cell performance. A fuzzy controller is proven to be better in improving the output power of fuel cells. The three control objectives are the fan speed control for regulating temperature, the solenoid valve on/off control of the bubble humidifier for humidity variation and the speed of the pump for regulating temperature difference. In addition, the results from the PID controller stack model and the fuzzy controller stack model are compared in this research. The fuel cell bench test has been built to validate the effectiveness of the proposed fuzzy control. The maximum temperature of the stack can be reduced by 5 °C with the fuzzy control in this paper, so the fuel cell output voltage (power) increases by an average of approximately 5.8%.

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Linderoth, Søren, Peter Halvor Larsen, M. Mogensen, Peter V. Hendriksen, N. Christiansen y H. Holm-Larsen. "Solid Oxide Fuel Cell (SOFC) Development in Denmark". Materials Science Forum 539-543 (marzo de 2007): 1309–14. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.1309.

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The SOFC technology under development at Risø National Laboratory (RISØ) and Topsoe Fuel Cell A/S (TOFC) is based on an integrated approach ranging from basic materials research on single component level over development of cell and stack manufacturing technology to system studies and modelling. The effort also comprises an extensive cell and stack testing program. Systems design, development and test is pursued by TOFC in collaboration with various partners. The standard cells are thin and robust with dimensions of 12 x 12 cm2 and cell stacks are based on internal manifolding. Production of cells is being up-scaled continuously. The durability of the standard stack design with standard cells has been tested for more than 13000 hours including nine full thermal cycles with an overall voltage degradation rate of about 1% per 1000 hours. Recently, the degradation rate has been significantly reduced by introduction of improved stack component materials. 75-cell stacks in the 1+ kW power range have been tested successfully. Stacks have been delivered in a pre-reduced state to partners and tested successfully in test systems with natural gas as fuel. The consortium of TOFC and RISØ has an extended program to develop the SOFC technology all the way to a marketable product. Stack and system modelling including cost optimisation analysis is used to develop multi kW stack modules for operation in the temperature range 700-850oC. To ensure the emergence of cost-competitive solutions, a special effort is focused on larger anode-supported cells as well as a new generation of SOFCs based on porous metal supports and new electrode and electrolyte materials. The SOFC program comprises development of next generation of cells and multi stack modules for operation at lower temperature with increased durability and mechanical robustness in order to ensure long-term competitiveness.

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Zhang, Zhiming, Zhihao Chen, Kunpeng Li, Xinfeng Zhang, Caizhi Zhang y Tong Zhang. "A Multi-Field Coupled PEMFC Model with Force-Temperature-Humidity and Experimental Validation for High Electrochemical Performance Design". Sustainability 15, n.º 16 (16 de agosto de 2023): 12436. http://dx.doi.org/10.3390/su151612436.

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PEMFCs (Proton Exchange Membrane Fuel Cells) are commonly used in fuel cell vehicles, which facilitates energy conversation and environmental protection. The fuel cell electrochemical performance is significantly affected by the contact resistance and the GDL (Gas Diffusion Layer) porosity due to ohmic and concentration losses. However, it is difficult to obtain the exact performance prediction of the electrochemical reaction for a fuel cell design, resulting from the complex operating conditions of fuel cells coupled with the assembly force, operating temperature, relative humidity, etc. Considering the compression behavior of porosity and the contact pressure in GDLs, a force-temperature-humidity multi-field coupled model is established based on FEA (Finite Element Analysis) and CFD (Computational Fluid Dynamics) for the fuel cell electrochemical performance. Aside from that, the characteristics between the contact resistance and the contact pressure are measured and fitted through the experiments in this study. Finally, the numerical model is validated by the experiment of the fuel cell stack, and the error rate between the presented model and the experimentation of the full-dimensional stack being a maximum of 3.37%. This work provides important insight into the force-temperature-humidity coupled action as less empirical testing is required to identify the high fuel cell performance and optimize the fuel cell parameters in a full-dimensional fuel cell stack.

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Zeng, Yijin, Jian Huang, Zhiliang Wang, Junxiong Li y Yahui Yi. "Optimization of Fuel Cell Stack Consistency Based on Multi-Model". Scientific Programming 2022 (14 de junio de 2022): 1–12. http://dx.doi.org/10.1155/2022/9242940.

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With the proposal of cloud computing, fog computing, and edge computing, various simulation operations are greatly guaranteed, which benefits the multi-model operations of Matlab and CFD. This paper established the 1-D flow network model and 12 cm ∗ 8 cm 3-steady-state PEMFC model. Based on the experiment, the intake flow distribution of the cathode anode of 80 cells is simulated to obtain the maximum and minimum intake flow cell. The 3-D and steady-state single-cell model is used to calculate the cell’s performance, and the performance difference between the two cells is improved by optimizing the size structure of the single cell. The results show that the best version of the cell was obtained when the values of the width and depth were 1.1 mm and 0.8 mm, and the power density difference between the two cells decreased from 5.7% to 2.1%. The voltage difference at 1000 mA·cm−2 current density decreases from 0.065 to 0.035 V after optimization. The intake flow extreme difference of the reactor improved significantly, and C v was reduced by 48.7%.

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Xu, Ming, Hanlin Wang, Mingxian Liu, Jianning Zhao, Yuqiong Zhang, Pingping Li, Mingliang Shi, Siqi Gong, Zhaohuan Zhang y Chufu Li. "Performance test of a 5 kW solid oxide fuel cell system under high fuel utilization with industrial fuel gas feeding". International Journal of Coal Science & Technology 8, n.º 3 (13 de mayo de 2021): 394–400. http://dx.doi.org/10.1007/s40789-021-00428-2.

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AbstractAs the demand for green energy with high efficiency and low carbon dioxide (CO2) emissions has increased, solid oxide fuel cells (SOFCs) have been intensively developed in recent years. Integrated gasification fuel cells (IGFCs) in particular show potential for large-scale power generation to further increase system efficiency. Thus, for commercial application of IGFCs, it is important to design reliable multi-stacks for large systems that show long-term stability and practical fuel gas for application to industrial equipment. In this work, a test rig (of a 5 kW SOFC system, with syngas from industrial gasifiers as fuel) was fabricated and subjected to long-term tests under high fuel utilization to investigate its performance. The maximum steady output power of the system was 5700 W using hydrogen and 5660 W using syngas and the maximum steady electrical efficiency was 61.24% while the fuel utilization efficiency was 89.25%. The test lasted for more than 500 h as the fuel utilization efficiency was larger than 83%. The performances of each stack tower were almost identical at both the initial stage and after long-term operation. After 500 h operation, the performances of the stack towers decreased only slightly under lower current and showed almost no change under high current. These results demonstrate the reliability of the multi-stack design and the prospect of this SOFC power-generation system for further enlarging its application in a MWth demonstration.

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Liang, YiFan, QianChao Liang, JianFeng Zhao, MengJie Li, JinYi Hu y Yang Chen. "Online identification of optimal efficiency of multi-stack fuel cells(MFCS)". Energy Reports 8 (julio de 2022): 979–89. http://dx.doi.org/10.1016/j.egyr.2022.01.243.

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Zheng, Jianmin, Liusheng Xiao, Mingtao Wu, Shaocheng Lang, Zhonggang Zhang, Ming Chen y Jinliang Yuan. "Numerical Analysis of Thermal Stress for a Stack of Planar Solid Oxide Fuel Cells". Energies 15, n.º 1 (4 de enero de 2022): 343. http://dx.doi.org/10.3390/en15010343.

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In this work, a 3D multi-physics coupled model was developed to analyze the temperature and thermal stress distribution in a planar solid oxide fuel cell (SOFC) stack, and then the effects of different flow channels (co-flow, counter-flow and cross-flow) and electrolyte thickness were investigated. The simulation results indicate that the generated power is higher while the thermal stress is lower in the co-flow mode than those in the cross-flow mode. In the cross-flow mode, a gas inlet and outlet arrangement is proposed to increase current density by about 10%. The generated power of the stack increases with a thin electrolyte layer, but the temperature and its gradient of the stack also increase with increase of heat generation. The thermal stress for two typical sealing materials is also studied. The predicted results can be used for design and optimization of the stack structure to achieve lower stress and longer life.

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Montaland, Patrice. "Multi-Scale Physical Modeling of Fuel Cells, From Sub-System to Stack". ECS Transactions 17, n.º 1 (18 de diciembre de 2019): 149–60. http://dx.doi.org/10.1149/1.3142745.

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Wang, Yingmin, Ying Han, Weirong Chen y Ai Guo. "HIERARCHICAL ENERGY MANAGEMENT STRATEGY BASED ON THE MAXIMUM EFFICIENCY RANGE FOR A MULTI-STACK FUEL CELL HYBRID POWER SYSTEM". DYNA 98, n.º 4 (1 de julio de 2023): 397–405. http://dx.doi.org/10.6036/10857.

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A multi-stack fuel cell hybrid power system (MFCHS) consists of multiple sources with various characteristics. The power distribution between different sources influences the performance of the system, which involves many factors. To distribute the power effectively and enhance the efficiency and fuel economy of a single-stack fuel cell system, this study proposed a hierarchical energy management strategy (EMS) for MFCHS. An MFCHS configuration that included three fuel cell systems and a battery was presented. An MFCHS model that incorporated the effect of altitude was constructed, and an efficiency analysis of the multi-stack fuel cell system (MFCS) was performed. The hierarchical EMS of MFCHS was composed of a bottom control layer and a top management layer. The bottom control layer utilized a coordinated optimal distribution strategy based on the maximum efficiency range of MFCS to realize optimal power allocation between the different fuel cells in MFCS. The top management layer used EMS under multiple operating conditions to realize the effective distribution of the demand power between MFCS and the battery. Results demonstrate that the proposed strategy improves the average efficiency of MFCS by up to 5.2% and 8.9% compared with those of the equal distribution and daisy chain strategies, respectively. The proposed strategy also displays good performance in terms of the hydrogen consumption of MFCS, which saved 1% and 3% hydrogen compared with the equal distribution and daisy chain strategies, respectively. The proposed strategy results in promising improvements in the overall performance of the system. This study provides a good reference for developing EMS for MFCHS. Keywords: Fuel cell, Multi-stack fuel cell hybrid power system, Energy management strategy, Coordinated optimal distribution, Maximum efficiency range

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Tesis sobre el tema "Multi-Stack fuel cells"

Zuo, Jian. "Développement de stratégies de gestion conjointe de la détérioration et de de l'énergie pour un système multi-piles à combustible PEM". Electronic Thesis or Diss., Université Grenoble Alpes, 2022. http://www.theses.fr/2022GRALT077.

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Les systèmes de piles à combustible offrent une solution durable à la production d'énergie électrique dans le secteur des transports, même s'ils rencontrent encore des problèmes de fiabilité et de durabilité. Le recours à des systèmes multi-piles à combustible (MFC) au lieu de piles à combustible uniques est une solution prometteuse pour surmonter ces limitations en répartissant de manière optimale la demande de puissance entre les différentes piles tout en tenant compte de leur état de santé, au moyen d'une stratégie de gestion de l'énergie (EMS) efficace. Dans ce travail, différentes stratégies ont été développées pour des applications automobiles, avec l'objectif d'optimiser la durée de vie du système de piles à combustible.Le premier défi est de développer un modèle reliant la détérioration de chaque pile avec la puissance délivrée, de manière à être en mesure de prédire l'effet d'une allocation de charge sur la détérioration de chaque pile, et ainsi prendre une décision post-pronostic pertinente. Plusieurs modèles stochastiques de détérioration, allant du modèle classique de processus Gamma à des modèles plus complexes avec des effets aléatoires, sont développés et adaptés aux spécificités des piles à combustible. Sur la base de ces modèles, plusieurs stratégies de décision post-pronostic pour une MFC sont proposées et, pour chacune d'entre elles, le problème d'optimisation associé est formulé.Tout d'abord, sous un profil de charge constant, en prenant en compte dans le processus de décision à la fois la consommation totale de combustible et la détérioration attendue, une stratégie de gestion de l'énergie tenant compte de la détérioration est proposée pour un système constitué de trois piles à combustible. Le problème d'optimisation multi-objectif associé à cette stratégie est résolu à l'aide d'un algorithme évolutionnaire, ce qui permet d'obtenir les allocations de charge optimisées pour chacune des piles du système. La durée de vie moyenne obtenue dans le cadre de la stratégie proposée s'avère plus longue que celle résultant de stratégies classiques (Average Load, Daisy Chain).De plus, sous un profil de charge dynamique aléatoire, et en prenant en compte les phénomènes de détérioration dus à la fois au niveau et aux variations de la charge, une stratégie de prise de décision est proposée pour un système de deux piles à combustible. La prise de décision est réalisée à chaque événement de modification de la demande, et les allocations de charge optimales sont obtenues en minimisant la fonction objectif qui est estimée sur la base de la prévision de la détérioration future du système. Une étude de l'influence des charges dynamiques aléatoires sur les performances de la stratégie proposée montre que la durée de vie moyenne obtenue dans le cas d’une durée inconnue entre deux modifications de demande est proche de celle obtenue avec une durée d'événement connue, ce qui prouve la robustesse de la stratégie proposée. De plus, il est montré que la durée de vie moyenne du système est augmentée par rapport au cas avec une stratégie de charge moyenne, sur plusieurs modèles de détérioration stochastique différents.Enfin, une étude plus exploratoire ouvre des perspectives de recherche dans le cas où le système multi-piles est composé de trois piles, dont deux seulement fonctionnent en même temps. Pour optimiser la durée de vie des piles, tout en répondant à la demande de charge, le système de gestion de l’énergie doit également optimiser le démarrage et l'arrêt des différentes piles. En fait, l'optimisation du remplacement des piles est également nécessaire pour une tâche d'exploitation à long terme. Par conséquent, cette étude ouvre la voie à des approches de maintenance pour les systèmes multi-piles
Fuel cell systems offer a sustainable solution to electrical power generation in the transportation sector, even if they still encounter reliability and durability issues. Resorting to Multi-stack Fuel Cells systems (MFC) instead of single fuel cells is a promising solution to overcome these limitations by optimally distributing the power demand among the different stacks while taking into account their state of health, by means of an efficient Energy Management Strategy (EMS). In this work, different strategies have been developed for vehicle applications, with the objective of optimizing the fuel cell system lifetime.The first challenge is to develop a model linking the deterioration trend of each stack with the power delivered by the stack, so as to predict the effect of a load allocation on each stack deterioration, and thus make a relevant post-prognostics decision. Several stochastic deterioration models, from the classical Gamma process model to more complex models with random effects are developed and tailored to the fuel cell specificities. Based on these models, several post-prognostics decision-making strategies for an MFC are proposed and, for each of them, the associated optimization problem is formulated.First, under a constant load profile, taking into consideration both the expected whole fuel consumption and the expected deterioration in the decision-making process, a deterioration-aware energy management strategy is proposed for a three-stack fuel cell system. The multi-objective optimization problem associated to this strategy is solved using an evolutionary algorithm, giving the optimized load allocations among stacks. The average lifetime obtained under the proposed strategy is demonstrated to be larger than those resulting from the classical Average Load and Daisy Chain strategies.Furthermore, under a random dynamic load profile, taking into consideration the deterioration phenomena due to both the load magnitude and the load variations, an event-based decision-making strategy is built for a two-stack fuel cell system. The optimal load allocations are obtained by minimizing the objective function which is estimated based on the prevision of the future system deterioration. An investigation on the influence of the random dynamic loads on the proposed strategy performance shows that the average lifetime obtained with unknown event duration is close to that with known event duration, which proves the robustness of the proposed strategy. Moreover, it is shown that the average system lifetime is increased when compared to the case with an Average Load strategy, on several different stochastic deterioration models.Lastly, a more exploratory study opening research perspectives in the case where the multi-stack system is composed of three stacks, only two of which are operating at the same time. To optimize the lifetime of the stacks, while meeting the load demand, the EMS must also optimize the start and stop of the different stacks. In fact, the optimization of stack replacement is also required for a long-term operation task. Therefore, this study opens the way to maintenance approaches to multi-stack systems

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Frappé, Emmanuel. "Architecture de convertisseur statique tolérante aux pannes pour générateur pile à combustible modulaire de puissance-traction 30kW". Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00796139.

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Dans l'objectif d'une augmentation en puissance des piles à combustible pour satisfaire les besoins énergétiques des applications embarquées, une solution consiste à augmenter la taille des assemblages. Dès lors, des problèmes de disparités fluidique, thermique et électrique peuvent survenir dans le cœur des piles et conduire ainsi à l'apparition de défaut. La pile à combustible, de par sa nature de source électrique basse tension - fort courant, requiert d'être couplée au réseau électrique embarqué par l'intermédiaire d'un convertisseur statique. Ce dernier peut alors être employé pour agir de façon corrective sur la pile et aussi de corriger les défaillances qui en sont liées. Dans cette perspective, le convertisseur doit avoir en permanence un retour sur l'état de santé de la pile. Pour cela, une méthode de détection et d'identification de défaut de type noyage et d'assèchement pour une pile du type PEMFC a été approfondie. Cette méthode simple, économique en capteurs, se base sur la mesure de 3 tensions de cellule judicieusement sélectionnées et localisées sur la pile. Ainsi, l'utilisation de l'information " spatiale ", qui correspond à la position de la mesure de tension dans la pile permet d'identifier les défauts. Le principe de la détection localisée nous amène alors à considérer le concept de pile segmentée qui consiste à séparer électriquement la pile en 3 parties de façon à ce que des convertisseurs associés puissent agir électriquement sur chaque segment. L'action peut être du type tout ou rien, ou contrôlée. Cette dernière offre davantage de degrés de liberté, et est moins contraignante pour la pile d'un point de vue électrique. Pour choisir comment réaliser cette action, une étude comparative de plusieurs topologies de convertisseur est effectuée. Les structures alimentées en courant répondent au mieux aux contraintes électriques d'une PEMFC et sont donc privilégiées, de même que la nécessité d'une isolation galvanique imposée par la segmentation de la pile. Au final, une topologie de BOOST isolé résonant est apparue comme étant la topologie répondant au mieux à l'ensemble des critères (plage de fonctionnement, performances énergétiques, nombre de composants). L'ensemble convertisseur global intègre ainsi trois structures unitaires qui permettent d'offrir une modularité, une action indépendante sur chaque segment et de garantir une disponibilité du système grâce à un fonctionnement dégradé. Pour cela, la stratégie de commande de l'ensemble convertisseur intègre les informations issues de la méthode de détection. La thèse se termine avec le dimensionnement complet d'un pré-prototype du convertisseur avec le choix des composants actif et passifs, et du système de refroidissement associé.

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Lee, Shu-Feng y 李書鋒. "Multi-scale Simulation and Design of an Intermediate Temperature Micro Solid Oxide Fuel Cell Stack System". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/38644748094953947416.

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博士
國立清華大學
動力機械工程學系
97
本論文以多尺度模擬設計中低溫平板型微固態氧化物燃料電池堆系統，結合分子動態模擬(Molecular dynamics)與計算流體力學(Computational fluid dynamics)。分子動態模擬用來求出固態氧化物燃料電池電解質的最佳摻雜濃度，而且此固態電解質能夠在中低溫操作下仍具有良好離子傳導性能。本論文針對中低溫型固態電解質氧化釤-鈰固態電解質(samarium-doped ceria)與氧化釓-鈰固態電解質(gadolinium-doped ceria)比較傳統型釔安定化氧化鋯(yittria-stablized zirconia)固態電解質在中低溫下的性能表現。透過分子動態模擬探討摻雜濃度與操作溫度對於固態電解質中離子傳導率的影響，以及利用計算流體力學合併電化學反應方程式研究中低溫平板型微固態氧化物燃料電池堆性能。利用分子動態模擬，可以觀察氧離子在電解質內的傳遞現象，係藉由氧空洞的位置進行不連續性的動態傳遞，從分子動態模擬結果中得知，釤-鈰固態電解質與氧化釓-鈰固態電解質存在一最佳摻雜濃度。受到溫度影響，固態電解質內離子遷移性在較高溫時其傳導率越佳。最後，比對實驗結果證明分子動態模擬結果與實驗數據具有良好的匹配性。利用多尺度模擬，進行中低溫平板型微固態氧化物燃料電池堆性能研究，由計算流體力學合併電化學反應方程式針對不同固態電解質與進氣岐管設計進行電池性能差異研究。在873K中低溫平板型微固態氧化物燃料電池堆系統使用氧化釤-鈰固態電解質能獲得較高的性能，相較於傳統型釔安定化氧化鋯固態電解質在中低溫操作環境下電池性能表現較差。為了改善中低溫平板型微固態氧化物燃料電池堆系統性能，利用新設計的進氣岐管來改善氣體利用率，由電池性能模擬結果顯示，此新型進氣岐管設計確實能夠獲得較高的電池性能。

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Li, Chuan-Tien y 李川田. "Applying Taguchi Method and Intelligent Parameter Design to the Study of Performance on the Multi-Quality of PEM Fuel Cell Stack". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/54230188517203848258.

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"Cooling Strategy for Effective Automotive Power Trains: 3D Thermal Modeling and Multi-Faceted Approach for Integrating Thermoelectric Modules into Proton Exchange Membrane Fuel Cell Stack". Master's thesis, 2014. http://hdl.handle.net/2286/R.I.26885.

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abstract: Current hybrid vehicle and/or Fuel Cell Vehicle (FCV) use both FC and an electric system. The sequence of the electric power train with the FC system is intended to achieve both better fuel economies than the conventional vehicles and higher performance. Current hybrids use regenerative braking technology, which converts the vehicles kinetic energy into electric energy instead of wasting it. A hybrid vehicle is much more fuel efficient than conventional Internal Combustion (IC) engine and has less environmental impact The new hybrid vehicle technology with it's advanced with configurations (i.e. Mechanical intricacy, advanced driving modes etc) inflict an intrusion with the existing Thermal Management System (TMS) of the conventional vehicles. This leaves for the opportunity for now thermal management issues which needed to be addressed. Till date, there has not been complete literature on thermal management issued of FC vehicles. The primary focus of this dissertation is on providing better cooling strategy for the advanced power trains. One of the cooling strategies discussed here is the thermo-electric modules. The 3D Thermal modeling of the FC stack utilizes a Finite Differencing heat approach method augmented with empirical boundary conditions is employed to develop 3D thermal model for the integration of thermoelectric modules with Proton Exchange Membrane fuel cell stack. Hardware-in-Loop was designed under pre-defined drive cycle to obtain fuel cell performance parameters along with anode and cathode gas flow-rates and surface temperatures. The FC model, combined experimental and finite differencing nodal net work simulation modeling approach which implemented heat generation across the stack to depict the chemical composition process. The structural and temporal temperature contours obtained from this model are in compliance with the actual recordings obtained from the infrared detector and thermocouples. The Thermography detectors were set-up through dual band thermography to neutralize the emissivity and to give several dynamic ranges to achieve accurate temperature measurements. The thermocouples network was installed to provide a reference signal. The model is harmonized with thermo-electric modules with a modeling strategy, which enables optimize better temporal profile across the stack. This study presents the improvement of a 3D thermal model for proton exchange membrane fuel cell stack along with the interfaced thermo-electric module. The model provided a virtual environment using a model-based design approach to assist the design engineers to manipulate the design correction earlier in the process and eliminate the need for costly and time consuming prototypes.
Dissertation/Thesis
Masters Thesis Technology 2014

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Capítulos de libros sobre el tema "Multi-Stack fuel cells"

Li, Duankai y Guorui Zhang. "Coordinated Control Technology for Multi-stack Fuel Cell System". En Springer Proceedings in Physics, 159–65. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-99-8581-4_17.

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Ye, Xiaming, Ruyi Qin, Ting He, Fangyi Ying, Jianqi Yao, Lijun Ma, Jiajie Yu y Yueping Yang. "A Power Distribution Method for Multi-stack Fuel Cell Considering Operating Efficiency and Aging". En The Proceedings of the 5th International Conference on Energy Storage and Intelligent Vehicles (ICEIV 2022), 696–706. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1027-4_72.

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Zhang, Zhiming, Christine Renaud y Zhiqiang Feng. "Numerical Analysis of Mechanical Multi-Contacts on the Interfaces in a PEM Fuel Cell Stack". En Computational Structural Engineering, 1225–30. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2822-8_138.

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Larrain, Diego, François Maréchal, Nordahl Autissier, Jan Van herle y Daniel Favrat. "Multi-scale modeling methodology for computer aided design of a solid oxide fuel cell stack". En Computer Aided Chemical Engineering, 1081–86. Elsevier, 2004. http://dx.doi.org/10.1016/s1570-7946(04)80246-3.

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Authayanun, Suthida, Artitaya Patniboon, Dang Saebea, Yaneeporn Patcharavorachot y Amornchai Arpronwichanop. "Effect of Flow Pattern on Single and Multi-stage High Temperature Proton Exchange Membrane Fuel Cell Stack Performance". En Computer Aided Chemical Engineering, 1471–76. Elsevier, 2014. http://dx.doi.org/10.1016/b978-0-444-63455-9.50080-5.

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Actas de conferencias sobre el tema "Multi-Stack fuel cells"

Sembler, William J. y Sunil Kumar. "Modification of Results From Computational-Fluid-Dynamics Simulations of Single-Cell Solid-Oxide Fuel Cells to Estimate Multi-Cell Stack Performance". En ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33014.

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A typical single-cell fuel cell is capable of producing less than one volt of direct current. Therefore, to produce the voltages required in most industrial applications, many individual fuel cells must typically be stacked together and connected electrically in series. Computational fluid dynamics (CFD) can be helpful to predict fuel-cell performance before a cell is actually built and tested. However, to perform a CFD simulation using a 3-dimensional model of an entire fuel-cell stack would require a considerable amount of time and multiprocessor computing capability that may not be available to the designer. To eliminate the need to model an entire multi-cell assembly, a study was conducted to determine the incremental effect on fuel-cell performance of adding individual solid-oxide fuel cells (SOFC) to a multi-fuel-cell stack. As part of this process, a series of simulations was conducted to establish a CFD-nodal density that would produce reasonably accurate results but that could also be used to create and analyze the relatively large models of the multi-cell stacks. Full 3-dimensional CFD models were then created of a single-cell SOFC and of SOFC stacks containing two, three, four, five and six cells. Values of the voltage produced when operating with various current densities, together with temperature distributions, were generated for each of these CFD models. By comparing the results from each of the simulations, adjustment factors were developed to permit single-cell CFD results to be modified to estimate the performance of stacks containing multiple fuel cells. The use of these factors could enable fuel-cell designers to predict multi-cell stack performance using a CFD model of only a single cell.

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Lunghi, Piero y Roberto Bove. "Performance Enhancement of Fuel Cells Systems Through Series and Parallel Connections of Multi Stack Arrays". En ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33166.

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Fuel cells have been known theoretically for more than a century. Recently conceived high temperature fuel cells, by guaranteeing higher degrees of efficiencies and greater fuel flexibility, have the potential to yield a radical change in the future of distributed electricity market promising high efficient and ultra-clean power generation. In the last years progress has been so relevant that they seem to be on the verge of commercialization. All plants commissioned seem to consider the parallel flow solution i.e. in which primary fuel flow splits to enter all the stacks that works with nominally equal operational parameters. The present work analysed the possibility of disposing stacks in an array, thus leading to a combination of series and parallel fluid dynamic connection so that one cell anode may have as input the exhaust of another cell anode. The aim is to allow some cells to work with low utilization factors and therefore at greater voltages. Different solutions have been analysed with a tool obtained from the integration of a proprietary code for cells simulation, with Aspen+ flowsheet. Code predictions of cells performances have been validated by experimental campaigns [Lunghi and Burzacca 2002]. The results showed that a noticeable performance increase can be obtained with the proposed configuration without any significant complication in the process. The authors believe that this should be considered as a very interesting research field and strongly encourage participation of the scientific community.

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Zuo, Jian, Catherine Cadet, Zhongliang Li, Christophe Bérenguer y Rachid Outbib. "A Load Allocation Strategy for Stochastically Deteriorating Multi-Stack PEM Fuel Cells". En 32nd European Safety and Reliability Conference. Singapore: Research Publishing Services, 2022. http://dx.doi.org/10.3850/978-981-18-5183-4_r22-01-051-cd.

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Mehida, H., M. Y. Ayad, R. Saadi, O. Kraa y A. Aboubou. "Multi-Stack Fuel Cells and Interleaved DC/DC Converters Interactions for Embedded Applications". En 2018 International Conference on Electrical Sciences and Technologies in Maghreb (CISTEM). IEEE, 2018. http://dx.doi.org/10.1109/cistem.2018.8613600.

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O’Brien, J. E., R. C. O’Brien, X. Zhang, G. G. Tao y B. J. Butler. "Long-Term Performance of Solid Oxide Stacks With Electrode-Supported Cells Operating in the Steam Electrolysis Mode". En ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62581.

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Performance characterization and durability testing have been completed on two five-cell high-temperature electrolysis stacks constructed with advanced cell and stack technologies. The solid oxide cells incorporate a negative-electrode-supported multi-layer design with nickel-zirconia cermet negative electrodes, thin-film yttria-stabilized zirconia electrolytes, and multi-layer lanthanum ferrite-based positive electrodes. The per-cell active area is 100 cm2. The stack is internally manifolded with compliant seals. Treated metallic interconnects with integral flow channels separate the cells and electrode gases. Stack compression is accomplished by means of a custom spring-loaded test fixture. Initial stack performance characterization was determined through a series of DC potential sweeps in both fuel cell and electrolysis modes of operation. Results of these sweeps indicated very good initial performance, with area-specific resistance values less than 0.5 Ω.cm2. Long-term durability testing was performed with a test duration of 1000 hours. Overall performance degradation was less than 10% over the 1000-hour period. Final stack performance characterization was again determined by a series of DC potential sweeps at the same flow conditions as the initial sweeps in both electrolysis and fuel cell modes of operation. A final sweep in the fuel cell mode indicated a power density of 0.356 W/cm2, with average per-cell voltage of 0.71 V at a current of 50 A.

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Geng, Ruixue, Rui Ma, Xiaoyue Chai, Yufan Zhang, Wentao Jiang y Yang Zhou. "An Improved Energy Management Strategy for Multi-Stack Fuel Cells Based on Hierarchical Strategy". En IECON 2023- 49th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2023. http://dx.doi.org/10.1109/iecon51785.2023.10311901.

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Chai, Xiaoyue, Rui Ma, Jian Song, Hailong Sun, Congcong Wang y Zhi Feng. "An Energy Management Strategy for All Electric Aircraft Based on Multi-stack Fuel Cells". En 2023 IEEE Transportation Electrification Conference & Expo (ITEC). IEEE, 2023. http://dx.doi.org/10.1109/itec55900.2023.10186915.

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Akbay, Taner, Norihisa Chitose, Takashi Miyazawa, Naoya Murakami, Kei Hosoi, Futoshi Nishiwaki y Toru Inagaki. "A Unique Seal-Less Solid Oxide Fuel Cell Stack and Its CFD Analysis". En ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2006. http://dx.doi.org/10.1115/fuelcell2006-97072.

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Combined Heat and Power (CHP) generation units based on intermediate temperature (600∼800°C) solid oxide fuel cell (SOFC) modules have been collaboratively developed by Mitsubishi Materials Corporation and The Kansai Electric Power Co., Inc. Currently, hydrocarbon fuel utilising units designed to produce modular power outputs up to 10 kWe-AC with overall efficiencies greater than 80% (HHV) are being tested. A unique seal-less stack concept is adopted to build SOFC modules accommodating multiple stacks incorporated of stainless steel separators and disk-type planar electrolyte-supported cells. In order to advance the current technology to achieve improved levels of efficiency and reliability, through design iterations, computational modelling tools are being heavily utilised. This contribution will describe the results of coupled computational fluid dynamics (CFD) analysis performed on our fourth-generation 1 kW class SOFC stack. A commercially available CFD code is employed for solving the governing equations for conservation of mass, momentum and energy. In addition, a local electrochemical reaction model is coupled to the rest of the transport processes that take place within the SOFC stack. It is found that the CFD based multi-physics model is capable of providing necessary and proper guidance for identifying problem areas in designing multi-cell SOFC stacks. The stack performance is also estimated by calibrating the computational model against data obtained by experimental measurements.

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Zhou, Su, Jianhua Gao, Lei Fan, Gang Zhang, Yanda Lu y Jiang Li. "A Study on Optimization Design of Hydrogen Supply Integrated Subsystem for Multi-Stack Fuel Cells". En SAE 2022 Vehicle Electrification and Powertrain Diversification Technology Forum. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2022. http://dx.doi.org/10.4271/2022-01-7039.

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