VISUALIZATION STUDY OF CATHODE FLOODING WITH DIFFERENT OPERATING CONDITIONS IN A PEM UNIT FUEL CELL

Size: px
Start display at page:

Download "VISUALIZATION STUDY OF CATHODE FLOODING WITH DIFFERENT OPERATING CONDITIONS IN A PEM UNIT FUEL CELL"

Transcription

1 Proceedings of FUELCELL2005 Third International Conference on Fuel Cell Science, Engineering and Technology May 23-25, 2005, Ypsilanti, Michigan FUELCELL VISUALIZATION STUDY OF CATHODE FLOODING WITH DIFFERENT OPERATING CONDITIONS IN A PEM UNIT FUEL CELL Han-Sang Kim, Tae-Hun Ha, Sung-Jin Park, Kyoungdoug Min, and Minsoo Kim School of Mechanical and Aerospace Engineering, Seoul National University, San 56-1, Shinlim-Dong, Kwanak-Gu, Seoul, , South Korea hsk007@plaza.snu.ac.kr, kdmin@snu.ac.kr ABSTRACT Visualization technique was used to better understand the water build-up phenomena on the cathode side of a proton exchange membrane (PEM) unit fuel cell. In this study, a transparent PEM unit fuel cell with an active area of 25 cm 2 was designed and fabricated to allow for the visualization of cathode channel with fuel cell performance characteristics. Two-phase flow due to the electrochemical reaction of fuel cell was experimentally investigated. The images photographed by CCD camera with various cell temperatures (30 50 o C) and different inlet humidification levels were presented in this study. Results indicated that the flooding on the cathode side first occurs near the exit of cathode flow channel. As the fuel cell operating temperature increases, it was found that water droplets tend to evaporate easily because of increased saturation vapor pressure and it can have an influence on lowering the flooding level. The approaches of this study can effectively contribute to the detailed researches on water transport phenomena including modeling water transport of an operating PEM fuel cell. INTRODUCTION The PEM fuel cell has received much attention as a promising future power source for mobile and portable applications due to its high power density, quick start-up, low emissions, low-temperature operation, the ability to respond to rapid load change, and system robustness. However, because of low operating temperature (less than 100 o C) of the PEM fuel cell, water management is a critical operation issue for achieving high performance and efficiency. Figure 1 shows the schematic of water movements in a PEM fuel cell. Water is supplied into the fuel cell via humidified gas. When a current is drawn from the fuel cell, water tends to migrate from the anode to the cathode along with the protons through the membrane under the electro-osmotic drag. This electro-osmotic transport results in an accumulation of water at the cathode side together with the water production due to the oxygen reduction reaction at the cathodic membraneelectrode interface. The increasing gradient between anodic and cathodic water concentration can cause the flux towards the anode. This flux called back diffusion can work against the drying of the membrane on the anode side [Eckl et al. (2004), Janssen and Overvelde (2001), Karimi and Li (2005)]. Cathode Catalyst Layer Air + in Cathode Flow Channel Transport Cathode Gas Diffusion Layer Proton Exchange Membrane H + (electroosmosis (backdiffusion) Transport Anode Gas Diffusion Layer e - e - e - e - e - e - Membrane Electrode Assembly (MEA) Anode Catalyst Layer Anode Flow Channel H 2 + in out + N 2 Excess H (permeation) 2 + excess O 2 + out Figure 1. Schematic diagram of the PEM fuel cell components and water movement in a PEM fuel cell 1 Copyright 2005 by ASME

2 The conductivity of proton is strongly dependent on the water content of the membrane. To maintain a high ionic conductivity and performance of a PEM fuel cell, the membrane should be sufficiently hydrated with proper water management which can make the balance between water production and water removal from the cell possible [Larminie and Dicks (2000)]. If the inlet gases are not well humidified, dehydration of the membrane occurs, causing a lower power and voltage for a given current density. On the other hand, if the liquid water content is too high in the fuel cell, the flooding of electrode resulting from excess water can hinder the transport of reactant, it can constitute a severe mass transfer limitation for oxygen on the cathode and hydrogen on the anode side. Hence, this can have a detrimental impact on fuel cell performance [Mench et al. (2003)]. The importance of flooding on the cathode side has been emphasized repeatedly in the literature [Hakenjos et al. (2004), Noponen et al. (2004), Pasaogullari et al. (2004), Tüber et al. (2003), Yang et al. (2004), Yang et al. (2005)]. Therefore, for the PEM fuel cell to be commercialized as vehicle or portable applications, the flooding of cathode side should be minimized during the operation of PEM fuel cell. The aim of the present work is two-fold. The first one is to provide a fundamental understanding of liquid water transport and its two-phase nature of flow in an operating PEM fuel cell. A transparent unit fuel cell has been developed to visualize the in situ water flooding. The physical processes on the dynamics (formation, growth, and transport) of water droplets are described and discussed. The second one is to investigate the effects of main operation parameters on cathode flooding characteristics. Two main parameters (operating temperature and inlet humidification level) are chosen in this study. The images taken by visualization experiment for two parameters are compared and analyzed. EXPERIMENTAL In this study, a carefully fabricated transparent unit fuel cell was developed to understand the liquid water transport and distribution in H 2 /air fed PEM fuel cell. Figure 2 represents the picture of the transparent fuel cell. The cell consists of an acryl window cover plate, carbon plates (one on the cathode side with a thickness of 1 mm), membrane/electrode assembly (MEA) and gold-coated current collectors. The modified serpentine flow path with rectangular channels of 0.7 mm in width, 1.0 mm in depth, and 35 passages was adopted for the anode and cathode. The anode and cathode flow fields are in counter-flow configuration. MEAs of 25 cm 2 were used for the experiments. The MEA used in this study is based on Nafion 112. The total MEA thickness (membrane, catalyst, and GDLs (gas diffusion layers)) is 0.65 mm. Figure 2. Transparent unit fuel cell used for this study Figure 3 shows a schematic diagram of experimental setup, which consists of a gas supply unit, unit fuel cell, electronic loader, different sensors, personal-computer (PC) based dataacquisition system, and CCD camera for visualization experiment. High-purity (> %) hydrogen (at the anode) and high purity (> 99.99%) dry air (at the cathode) were used as reactant gases. The flow rates of hydrogen and air were controlled and measured by two mass flow controllers. The humidification temperatures of the reactant gases were controlled by adjusting the humidifier temperature. Hydrogen Nitrogen Air Oxygen Check Valve Mass flow controller Check Valve Mass flow controller Humidifier Humidifier Anode Cathode Backpressure regulator CCD Backpressure regulator Figure 3. Schematic diagram of experimental setup for the visualization of cathode flooding 2 Copyright 2005 by ASME

3 The anode and cathode humidification temperatures were set equal to the cell operating temperature. To visualize the water flooding, the visualization experiment was carried out with cell polarization characteristics under the condition of constant voltage (0.4 V) discharge operating by applying an electronic load. The details of test conditions are listed in Table 1. At the time when the emergence of water droplets was detected in the window of CCD camera, image recording was started. The photographed images were recorded with a time interval of 10s. Table 1. Details of test conditions Flow rate (l/min) (Air/H 2 ) 0.75 / 0.15 Temperature ( o C) (Cathode Humidification/Cell/ Anode Humidification) Pressure (Cathode/Anode) RESULTS AND DISCUSSION 30/30/30 (Case I) 40/40/40 (Case II) 50/50/50 (Case III) 30/40/30 (Case IV) 50/40/50 (Case V) Near ambient Dynamics of Liquid Water Droplets Figure 4 shows the close-up images of dynamic process of water droplets in the cathode flow channel for Case I. The images represent the evolution of water droplets related to twophase flow due to the electrochemical reaction of the fuel cell. Only very small liquid droplets are observed at the early stage when the current is drawn from the cell. The observations suggest that the size and frequency of water droplets increase with time. The sizes of droplets are about mm and confined by the dimension of cathode flow channel. The formation of liquid droplets is not uniform on the GDL surface. It is due to the fact that the open pores of GDL are not distributed regularly. Hence, the liquid droplets are distributed discretely on the GDL and flow channel interface along the cathode channel. The growth of water droplets is generally known to be governed by the saturation vapor pressure, the buoyancy force on the droplet, and surface tension. The size of water droplet increases very gradually with time and the locations of liquid water droplets do not change much until they grow to a sufficient size to be swept away by incoming air flow. Hence, it clearly indicates that the surface tension has dominant effect on liquid droplet behavior in the transparent PEM fuel cell of this study [Lu and Wang (2004)]. It is observed that the flooding first occurs near the exit of the cathode flow channel. This is because the liquid water generated by electrochemical reaction is accumulated at the outlet of flow channel with the effect of air flow. Also, it is found that some of the flow channels are blocked with liquid water. This can impede the transport of reactants from the flow channel to the reaction sites. Influence of Operating Temperature Figure 5 displays the images of flow field flooding with different operating temperatures (30, 40, 50 o C). As the operating temperature of fuel cell increases, the flow field flooding level tends to be lowered. This can be explained by the fact that the liquid droplets can easily evaporate with the increase of saturation vapor pressure resulting from the increase in the temperature of unit fuel cell and supplied gases [Hakenjos et al. (2004)]. As the temperature increases, the surface tension between water droplets and substrate decreases. Therefore, water droplets can not continuously grow, are elongated in shape, and swept away along the cathode channel. Especially, for the operating temperature of 50 o C (Case III), the flooding areas were not observed except the outlet of the cathode flow channel. This can be understood by the steep increase in saturation vapor pressure at the temperature of 50 o C. Also the ohmic heat generated inside the fuel cell contributes to the increase in cell temperature and hence it can lower the flooding level of the flow channel. Influence of Inlet Humidification Level To see the effect of inlet humidification level on flooding level, the visualization experiment was conducted with varying the inlet humidification temperature. The cell temperature was set equal to 40 o C. The anode and cathode inlet humidification temperature ranged between 30 and 50 o C. Other fuel cell operating conditions remained unchanged. Figure 6 shows the comparison of visualization images of water droplets for two different inlet humidification temperatures (Case IV (low humidification case), Case V (high humidification case)). At the early stage (< 5s), the condensing of water was not observed on the cathode flow channel and GDL surface, although the air was supplied with fully humidified for high humidification case. As time elapses, some fog by the instant condensation of inlet gas on the upper surface of acryl window can be seen. However, the fog disappears after a few seconds. As time proceeds, water droplets can be seen on the GDL and cathode flow channel interface. It is found that the emergence of liquid water droplets from GDL is observed earlier for Case V than for Case IV. Also, for high humidification case, the frequency of liquid droplet occurrence increases more rapidly, larger part of the flow channels are filled with liquid water droplets. On the other hand, for low humidification case, the flooded area cannot increase much because the fuel cell inside becomes dry because of lower inlet humidity and ohmic heat generation. 3 Copyright 2005 by ASME

4 CONCLUSIONS Knowledge of the liquid water transport and its related cathode flooding phenomena in an operating PEM fuel cell is critical for proper water management. In this study, a carefully designed transparent unit fuel cell was developed. The physical process on liquid water droplet behavior related to the cathode flooding and the effect of main operating parameters on flooding characteristics were mainly investigated. The major conclusions derived from this work can be summarized as follows; 1. The flooding starts near the outlet of the cathode flow channel. This can be explained by the effect of the accumulation of liquid water due to the electrochemical reaction and the air flow directing towards the exit of flow channel. 2. The size of liquid droplets is between 0.1 and 0.8 mm and it increases very gradually with time. The locations of liquid water droplets do not change much for the case of cathode flow channel configuration adopted for this work. Hence, it clearly reveals that the liquid droplet behavior is mainly affected by the surface tension. 3. As the operating temperature of fuel cell increases, the flow field flooding level tends to be lowered. This is attributed to the increase of saturation vapor pressure and subsequent decrease in surface tension. 4. With higher inlet humidification level, the area of flooding tends to increase and the emergence of liquid water droplets is shortened. Finally, it is expected that the key data obtained through this study can provide basic insight into the prediction of cathode flooding mechanism and the setup and validation of threedimensional fuel cell physical models considering two-phase flow and cathode flooding phenomena. Larminie, J. and Dicks, A., 2000, Fuel Cell Systems Explained, John Wiley & Sons, Ltd. Lu, G. Q. and Wang, C. Y., 2004, Electrochemical and flow characterization of a direct methanol fuel cell, J. Power Sources, Vol. 134, pp Mench, M. M., Wang, C. Y., and Ishikawa, M., 2003, In Situ Current Distribution Measurements in Polymer Electrolyte Fuel Cells, J. of Electrochem. Soc., Vol. 150, pp. A1052-A1059. Minkmas, V. W., Russell, H. K., and James, M. F., 2004, Operation of Nafion -based PEM fuel cells with no external humidification: influence of operating conditions and gas diffusion layers, J. Power Sources, Vol. 135, pp Noponen, M., Birgersson, E., Ihonen, J., Vynnycky, M., Lundblad, A., and Lindbergh, G., 2004, A Two-Phase Non- Isothermal PEFC Model: Theory and Validation, Fuel Cells, Vol. 4, pp Pasaogullari, U. and Wang, C. Y., 2004, Liquid Water Transport in Gas Diffusion Layer of Polymer Electrolyte Fuel Cells, J. of Electrochem. Soc., Vol. 151, pp. A399-A406. Tüber, K., Pócza, D., and Hebling, C., 2003, Visualization of water buildup in the cathode of a transparent PEM fuel cell, J. Power Sources, Vol. 124, pp Yang, H., Zhao, T. S., and Ye, Q., 2005, In situ visualization study of CO 2 gas bubble behavior in DMFC anode flow fields, J. Power Sources, Vol. 139, pp Yang, X. G., Zhang, F. Y., Lubawy, A. L., and Wang, C. Y., 2004, Visualization of Liquid Water Transport in a PEFC, Electrochemical and Solid-State Letters, Vol. 7, pp. A408- A411. REFERENCES Eckl, R., Zehtner, W., Leu, C., and Wagner, U., 2004, Experimental analysis of water management in a selfhumidifying polymer electrolyte fuel cell stack, J. Power Sources, Vol. 138, pp Hakenjos, A., Muenter, H., Wittstadt, U., and Hebling, C., 2004, A PEM fuel cell for combined measurement of current and temperature distribution, and flow field flooding, J. Power Sources, Vol. 131, pp Janssen, G.J.M. and Overvelde, M.L.J., 2001, Water transport in the proton-exchange-membrane fuel cell: measurements of the effective drag coefficient, J. Power Sources, Vol. 101, pp Karimi, G. and Li, X., 2005, Electroosmotic flow through polymer electrolyte membrane in PEM fuel cells, J. Power Sources, Vol. 140, pp Copyright 2005 by ASME

5 t = 30 s t = 70 s t = 110s t = 150 s t = 190 s t = 230s Figure 4. Images of the evolution of liquid water droplets on the GDL and flow channel interface (Experimental parameters are cathode humidification temperature of 30 o C; cell temperature of 30 o C; anode humidification temperature of 30 o C) 5 Copyright 2005 by ASME

6 a) Case I b) Case II c) Case III Figure 5. Images of flow field flooding with various operating temperatures 6 Copyright 2005 by ASME

7 t = 30 s t = 110 s t = 190s t = 270 s t = 350 s t = 430 s a) Case IV t = 30 s t = 110 s t = 190s t = 270 s t = 350 s t = 430 s b) Case V Figure 6. Comparison of flow field flooding with different inlet humidification temperatures (The experimental parameters are shown in Table 1.) 7 Copyright 2005 by ASME

Experimental investigation of dynamic responses of a transparent PEM fuel cell to step changes in cell current density with operating temperature

Experimental investigation of dynamic responses of a transparent PEM fuel cell to step changes in cell current density with operating temperature Journal of Mechanical Science and Technology 22 (2008) 2274~2285 Journal of Mechanical Science and Technology www.springerlink.com/content/1738-494x DOI 10.1007/s12206-008-0702-4 Experimental investigation

More information

TWO-PHASE FLOW IN ANODE INTERDIGITAL FLOW BED OF A LIQUID FED DIRECT METHANOL FUEL CELL. Abstract

TWO-PHASE FLOW IN ANODE INTERDIGITAL FLOW BED OF A LIQUID FED DIRECT METHANOL FUEL CELL. Abstract TWO-PHASE FLOW IN ANODE INTERDIGITAL FLOW BED OF A LIQUID FED DIRECT METHANOL FUEL CELL H Guo, J L Jia, J Kong, F Ye, C F Ma College of Environmental and Energy Engineering, Beijing University of Technology,

More information

Songwut Nirunsin 1, *, and Yottana Khunatorn 1

Songwut Nirunsin 1, *, and Yottana Khunatorn 1 The 23 rd Conference of the Mechanical Engineering Network of Thailand November 4 7, 29, Chiang Mai Quantification of Liquid Water Saturation in a Transparent Single-Serpentine Cathode Flow Channels of

More information

Temperature profiles of an air-cooled PEM fuel cell stack under active and passive cooling operation

Temperature profiles of an air-cooled PEM fuel cell stack under active and passive cooling operation Available online at www.sciencedirect.com Procedia Engineering 41 (2012 ) 1735 1742 International Symposium on Robotics and Intelligent Sensors 2012 (IRIS 2012) Temperature profiles of an air-cooled PEM

More information

A Study of Two-Phase Flow in a Polymer Electrolyte Fuel Cell Tang.M.Z, K.E.Birgersson

A Study of Two-Phase Flow in a Polymer Electrolyte Fuel Cell Tang.M.Z, K.E.Birgersson A Study of Two-Phase Flow in a Polymer Electrolyte Fuel Cell Tang.M.Z, K.E.Birgersson Engineering Science Programme, Faculty of Engineering, National University of Singapore, 10 Kent Ridge Road, Singapore

More information

Experimental Analyses of Cell Voltages for a Two-cell PEM Stack Under Various Operating Conditions

Experimental Analyses of Cell Voltages for a Two-cell PEM Stack Under Various Operating Conditions Journal of the Korean Society of Marine Engineering, Vol. 35, No. 7, pp. 88~890, 0(ISSN 6-9549) http://dx.doi.org/0.596/jkosme.0.35.7.88 Experimental Analyses of Cell Voltages for a Two-cell PEM Stack

More information

Fuel Cell Performance Augmentation: Gas Flow Channel Design for Fuel Optimization

Fuel Cell Performance Augmentation: Gas Flow Channel Design for Fuel Optimization Copyright 2009 Tech Science Press FDMP, vol.5, no.4, pp.399-409, 2009 Fuel Cell Performance Augmentation: Gas Flow Channel Design for Fuel Optimization A. B.Mahmud Hasan 1,2, S.M.Guo 1 and M.A.Wahab 1

More information

A THEORETICAL SIMULATION OF A PEM FUEL CELL WITH 4-SERPENTINE FLOW CHANNEL

A THEORETICAL SIMULATION OF A PEM FUEL CELL WITH 4-SERPENTINE FLOW CHANNEL A THEORETICAL SIMULATION OF A PEM FUEL CELL WITH 4-SERPENTINE FLOW CHANNEL B.Sreenivasulu a,*, S.V.Naidu b, V.Dharma Rao c, G.Vasu d a Department of Chemical Engineering,G.V.P College of Engineering, Visakhapatnam

More information

Effect of water transport properties on a PEM fuel cell operating with dry hydrogen

Effect of water transport properties on a PEM fuel cell operating with dry hydrogen Electrochimica Acta 51 (2006) 6361 6366 Effect of water transport properties on a PEM fuel cell operating with dry hydrogen Yinghua Cai a,b, Jun Hu a, Haipeng Ma a,b, Baolian Yi a,, Huamin Zhang a a Fuel

More information

Journal of Power Sources

Journal of Power Sources Journal of Power Sources 187 (2009) 156 164 Contents lists available at ScienceDirect Journal of Power Sources journal homepage: www.elsevier.com/locate/jpowsour Characterization of flooding and two-phase

More information

Prof. Mario L. Ferrari

Prof. Mario L. Ferrari Sustainable Energy Mod.1: Fuel Cells & Distributed Generation Systems Dr. Ing. Mario L. Ferrari Thermochemical Power Group (TPG) - DiMSET University of Genoa, Italy Lesson IV: fuel cells (PEFC or PEM)

More information

Simulation effect of operating temperature on performance of PEMFC based on serpentine flow field design

Simulation effect of operating temperature on performance of PEMFC based on serpentine flow field design Simulation effect of operating temperature on performance of PEMFC based on serpentine flow field design Pham Hoa Binh, Doan Cong Thanh Department of Automobile Engineering, Hanoi University of Industry,

More information

Temperature distribution on the MEA surface of a PEMFC with serpentine channel flow bed

Temperature distribution on the MEA surface of a PEMFC with serpentine channel flow bed Journal of Power Sources 157 (2006) 181 187 Temperature distribution on the MEA surface of a PEMFC with serpentine channel flow bed Maohai Wang, Hang Guo, Chongfang Ma The Key Laboratory of Enhanced Heat

More information

The flow-field pattern Optimization of the Bipolar Plate for PEMFC Considering the Nonlinear Material

The flow-field pattern Optimization of the Bipolar Plate for PEMFC Considering the Nonlinear Material Int. J. Electrochem. Sci., 10 (2015) 2564-2579 International Journal of ELECTROCHEMICAL SCIENCE www.electrochemsci.org The flow-field pattern Optimization of the Bipolar Plate for PEMFC Considering the

More information

Water Transport through a Proton-Exchange Membrane (PEM) Fuel Cell Operating near Ambient Conditions: Experimental and Modeling Studies

Water Transport through a Proton-Exchange Membrane (PEM) Fuel Cell Operating near Ambient Conditions: Experimental and Modeling Studies Energy & Fuels 2009, 23, 397 402 397 Water Transport through a Proton-Exchange Membrane (PEM) Fuel Cell Operating near Ambient Conditions: Experimental and Modeling Studies D. S. Falcão, C. M. Rangel,

More information

Studying the Water Transport in a Proton Exchange Membrane Fuel Cell by Neutron Radiography and Relative Humidity Sensors

Studying the Water Transport in a Proton Exchange Membrane Fuel Cell by Neutron Radiography and Relative Humidity Sensors Studying the Water Transport in a Proton Exchange Membrane Fuel Cell by Neutron Radiography and Relative Humidity Sensors Yong-Song Chen 1 Huei Peng Department of Mechanical Engineering, University of

More information

Effect of Mass Flow Rate and Temperature on the Performance of PEM Fuel Cell: An Experimental Study

Effect of Mass Flow Rate and Temperature on the Performance of PEM Fuel Cell: An Experimental Study Research Article International Journal of Engineering and Technology ISSN 2277-4106 2013 INPRESSCO. All Rights Reserved. Available at http://inpressco.com/category/ijcet Effect of Mass Flow Rate and Temperature

More information

Numerical Studies of PEM Fuel Cell with Serpentine Flow-Field for Sustainable Energy Use

Numerical Studies of PEM Fuel Cell with Serpentine Flow-Field for Sustainable Energy Use Numerical Studies of PEM Fuel Cell with Serpentine Flow-Field for Sustainable Energy Use Sang-Hoon Jang 1, GiSoo Shin 1, Hana Hwang 1, Kap-Seung Choi 1, Hyung-Man Kim 1,* 1 Department of Mechanical Engineering

More information

Title. Author(s)Aoyama, Yusuke; Suzuki, Kengo; Tabe, Yutaka; Chikahi. CitationElectrochemistry Communications, 41: Issue Date

Title. Author(s)Aoyama, Yusuke; Suzuki, Kengo; Tabe, Yutaka; Chikahi. CitationElectrochemistry Communications, 41: Issue Date Title Observation of water transport in the micro-porous l cryo-scanning electron microscope Author(s)Aoyama, Yusuke; Suzuki, Kengo; Tabe, Yutaka; Chikahi CitationElectrochemistry Communications, 41: 72-75

More information

DYNAMIC SIMULATION OF A PROTON EXCHANGE MEMBRANE FUEL CELL SYSTEM FOR AUTOMOTIVE APPLICATIONS

DYNAMIC SIMULATION OF A PROTON EXCHANGE MEMBRANE FUEL CELL SYSTEM FOR AUTOMOTIVE APPLICATIONS DYNAMIC SIMULATION OF A PROTON EXCHANGE MEMBRANE FUEL CELL SYSTEM FOR AUTOMOTIVE APPLICATIONS R. A. Rabbani 1 and M. Rokni 2 1. Technical University of Denmark, Kgs. Lyngby, Denmark; email: raar@mek.dtu.dk

More information

EXPERIMENTAL STUDY OF A DIRECT METHANOL FUEL CELL

EXPERIMENTAL STUDY OF A DIRECT METHANOL FUEL CELL EXPERIMENTAL STUDY OF A DIRECT METHANOL FUEL CELL M. M. Mench, S. Boslet, S. Thynell, J. Scott, and C.Y. Wang The Electrochemical Engine Center Department of Mechanical and Nuclear Engineering The Pennsylvania

More information

Dynamic water management of an open-cathode self-humidified PEMFC system

Dynamic water management of an open-cathode self-humidified PEMFC system Dynamic water management of an open-cathode self-humidified PEMFC system Doctoral Candidate: Director: Maria Serra i Prat Jordi Riera i Colomer Tutor: Assensi Oliva i Llena Thermal Engineering Department

More information

On mass transport in an air-breathing DMFC stack

On mass transport in an air-breathing DMFC stack INTERNATIONAL JOURNAL OF ENERGY RESEARCH Int. J. Energy Res. 25; 29:141 15 Published online in Wiley InterScience (www.interscience.wiley.com). DOI: 1.12/er.1138 On mass transport in an air-breathing DMFC

More information

Dynamic Characteristics of a Direct Methanol Fuel Cell

Dynamic Characteristics of a Direct Methanol Fuel Cell Maohai Wang 1 Hang Guo Chongfang Ma Enhanced Heat Transfer and Energy Conservation Key Lab of Ministry of Education, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing

More information

City, University of London Institutional Repository

City, University of London Institutional Repository City Research Online City, University of London Institutional Repository Citation: Ous, T. & Arcoumanis, C. (2008). Visualisation of water accumulation in the flow channels of PEMFC under various operating

More information

City Research Online. Permanent City Research Online URL:

City Research Online. Permanent City Research Online URL: Ous, T. & Arcoumanis, C. (2008). Visualisation of water accumulation in the flow channels of PEMFC under various operating conditions. Journal of Power Sources, 187(1), pp. 182-189. doi: 10.1016/j.jpowsour.2008.10.072

More information

Comparative Studies of a Single Cell and a Stack of Direct Methanol Fuel Cells

Comparative Studies of a Single Cell and a Stack of Direct Methanol Fuel Cells Korean J. Chem. Eng., 22(3), 406-411 (2005) Comparative Studies of a Single Cell and a Stack of Direct Methanol Fuel Cells Songki LeeQ, QQ, Daejin KimQ, Jaeyoung LeeQ, Sung Taik ChungQQ and Heung Yong

More information

Control and Analysis of Air, Water, and Thermal Systems for a Polymer Electrolyte Membrane Fuel Cell. Jong-Woo Ahn

Control and Analysis of Air, Water, and Thermal Systems for a Polymer Electrolyte Membrane Fuel Cell. Jong-Woo Ahn Control and Analysis of Air, Water, and Thermal Systems for a Polymer Electrolyte Membrane Fuel Cell by Jong-Woo Ahn A dissertation submitted to the Graduate Faculty of Auburn University in partial fulfillment

More information

Accelerated Stress Tests in PEM Fuel Cells: What can we learn from it?

Accelerated Stress Tests in PEM Fuel Cells: What can we learn from it? Accelerated Stress Tests in PEM Fuel Cells: What can we learn from it? D.P. Wilkinson 1,3, W. Merida 2,3 1 st Workshop : Durability and Degradation Issues in PEM Electrolysis Cells and its Components Fraunhofer

More information

A NOVEL REACTANT DELIVERY SYSTEM FOR PEM FUEL CELLS

A NOVEL REACTANT DELIVERY SYSTEM FOR PEM FUEL CELLS Proceedings of FuelCell2008 6th International Fuel Cell Science, Engineering & Technology Conference June 16 18, 2008, Denver, USA FuelCell2008-65142 A NOVEL REACTANT DELIVERY SYSTEM FOR PEM FUEL CELLS

More information

Fault Detection in Polymer Electrolyte Membrane Fuel Cells by Variable Behavior Analysis

Fault Detection in Polymer Electrolyte Membrane Fuel Cells by Variable Behavior Analysis Int. J. Mech. Eng. Autom. Volume 1, Number 3, 2014, pp. 182-192 Received: May 27, 2014; Published: September 25, 2014 International Journal of Mechanical Engineering and Automation Fault Detection in Polymer

More information

THE EFFECT OF CURRENT DENSITY PEMFC TO WATER LIQUID FORMATION IN CATHODE

THE EFFECT OF CURRENT DENSITY PEMFC TO WATER LIQUID FORMATION IN CATHODE THE EFFECT OF CURRENT DENSITY PEMFC TO WATER LIQUID FORMATION IN CATHODE Mulyazmi Department of Chemical Engineering, University of Bung Hatta Padang, West Sumatera, Indonesia E-Mail: mulyazmi@yahoo.com

More information

HYDROGEN FUEL CELL TECHNOLOGY

HYDROGEN FUEL CELL TECHNOLOGY HYDROGEN FUEL CELL TECHNOLOGY Vikash, Vipin Yadav, Vipin Badgaiyan Dronacharya College of Engineering, Gurgaon Abstract: - Whereas the 19th century was the century of the steam engine and the 20th century

More information

COMPUTATIONAL FLUID DYNAMICS MODEL OF HIGH PERFORMANCE PROTON EXCHANGE MEMBRANE FUEL CELL WITHOUT EXTERNAL HUMIDIFICATION

COMPUTATIONAL FLUID DYNAMICS MODEL OF HIGH PERFORMANCE PROTON EXCHANGE MEMBRANE FUEL CELL WITHOUT EXTERNAL HUMIDIFICATION COMPUTATIONAL FLUID DYNAMICS MODEL OF HIGH PERFORMANCE PROTON EXCHANGE MEMBRANE FUEL CELL WITHOUT EXTERNAL HUMIDIFICATION Željko Penga, Frano Barbir Faculty of electrical engineering, mechanical engineering

More information

WATER AND HEAT MANAGEMENT FOR IMPROVED PERFORMANCE OF PROTON EXCHANGE MEMBRANE FUEL CELLS

WATER AND HEAT MANAGEMENT FOR IMPROVED PERFORMANCE OF PROTON EXCHANGE MEMBRANE FUEL CELLS UNIVERSITY OF SPLIT FACULTY OF ELECTRICAL ENGINEERING, MECHANICAL ENGINEERING AND NAVAL ARCHITECTURE MECHANICAL ENGINEERING POSTGRADUATE STUDIES DOCTORAL QUALIFYING EXAM WATER AND HEAT MANAGEMENT FOR IMPROVED

More information

Journal of Power Sources

Journal of Power Sources Journal of Power Sources 191 (2009) 185 202 Contents lists available at ScienceDirect Journal of Power Sources journal homepage: www.elsevier.com/locate/jpowsour Review Small direct methanol fuel cells

More information

Polymer Electrolyte Membrane Fuel Cell as a Hydrogen. Flow Rate Monitoring Device. S. Giddey* and S.P.S. Badwal. CSIRO Energy Technology

Polymer Electrolyte Membrane Fuel Cell as a Hydrogen. Flow Rate Monitoring Device. S. Giddey* and S.P.S. Badwal. CSIRO Energy Technology The final definitive version of this manuscript was published in Ionics. The final publication is available at www.springerlink.com http://dx.doi.org/10.1007/s11581-012-0757-1 Ionics short communication

More information

Quantification of liquid water accumulation and distribution in a polymer electrolyte fuel cell using neutron imaging

Quantification of liquid water accumulation and distribution in a polymer electrolyte fuel cell using neutron imaging Journal of Power Sources 160 (2006) 1195 1203 Quantification of liquid water accumulation and distribution in a polymer electrolyte fuel cell using neutron imaging A. Turhan, K. Heller, J.S. Brenizer,

More information

Spatially-resolved current and impedance analysis of a stirred tank reactor and serpentine fuel cell flow-field at low relative humidity

Spatially-resolved current and impedance analysis of a stirred tank reactor and serpentine fuel cell flow-field at low relative humidity Journal of Power Sources 164 (2007) 464 471 Spatially-resolved current and impedance analysis of a stirred tank reactor and serpentine fuel cell flow-field at low relative humidity Warren H.J. Hogarth

More information

INVESTIGATION OF RUTHENIUM DISSOLUTION IN ADVANCED MEMBRANE ELECTRODE ASSEMBLIES FOR DIRECT METHANOL BASED FUEL CELL STACKS

INVESTIGATION OF RUTHENIUM DISSOLUTION IN ADVANCED MEMBRANE ELECTRODE ASSEMBLIES FOR DIRECT METHANOL BASED FUEL CELL STACKS 10.1149/1.2214500, copyright The Electrochemical Society INVESTIGATION OF RUTHENIUM DISSOLUTION IN ADVANCED MEMBRANE ELECTRODE ASSEMBLIES FOR DIRECT METHANOL BASED FUEL CELL STACKS T. I. Valdez 1, S. Firdosy

More information

HEAT AND MASS TRANSFER AND TWO PHASE FLOW IN HYDROGEN PROTON EXCHANGE MEMBRANE FUEL CELLS AND DIRECT METHANOL FUEL CELLS

HEAT AND MASS TRANSFER AND TWO PHASE FLOW IN HYDROGEN PROTON EXCHANGE MEMBRANE FUEL CELLS AND DIRECT METHANOL FUEL CELLS HEAT AND MASS TRANSFER AND TWO PHASE FLOW IN HYDROGEN PROTON EXCHANGE MEMBRANE FUEL CELLS AND DIRECT METHANOL FUEL CELLS Hang GUO a, b, Chong Fang MA a, *, Mao Hai WANG a, Jian YU a, Xuan LIU a, Fang YE

More information

The Pennsylvania State University. The Graduate School. Department of Mechanical and Nuclear Engineering

The Pennsylvania State University. The Graduate School. Department of Mechanical and Nuclear Engineering The Pennsylvania State University The Graduate School Department of Mechanical and Nuclear Engineering INDIVIDUAL AND COUPLED EFFECTS OF FLOW FIELD GEOMETRY, INTERFACE AND MATERIAL PROPERTIES ON LIQUID

More information

Water distribution measurement for a PEMFC through

Water distribution measurement for a PEMFC through Water distribution measurement for a PEMFC through neutron radiography Yong-Song Chen a, Huei Peng a *, Daniel S. Hussey b, David L. Jacobson b, Doanh T. Tran c, Tarek Abdel-Baset c, Mark Biernacki c a

More information

Progress in Energy and Combustion Science

Progress in Energy and Combustion Science Progress in Energy and Combustion Science 35 (2009) 275 292 Contents lists available at ScienceDirect Progress in Energy and Combustion Science journal homepage: www.elsevier.com/locate/pecs Mass transport

More information

Investigation of Two-Phase Transport Phenomena in Microchannels using a Microfabricated Experimental Structure

Investigation of Two-Phase Transport Phenomena in Microchannels using a Microfabricated Experimental Structure Heat SET 05 Heat Transfer in Components and Systems for Sustainable Energy Technologies 5-7 April 05, Grenoble, France Investigation of Two-Phase Transport Phenomena in Microchannels using a Microfabricated

More information

PRODUCTION OF A QUALIFIED POLYMER ELECTROLYTE FUEL CELL MEMBRANE ELECTRODE ASSEMBLY FOR EMERGING COMMERCIAL APPLICATIONS

PRODUCTION OF A QUALIFIED POLYMER ELECTROLYTE FUEL CELL MEMBRANE ELECTRODE ASSEMBLY FOR EMERGING COMMERCIAL APPLICATIONS PRODUCTION OF A QUALIFIED POLYMER ELECTROLYTE FUEL CELL MEMBRANE ELECTRODE ASSEMBLY FOR EMERGING COMMERCIAL APPLICATIONS Simon Cleghorn W. L. Gore & Associates, Inc. 201 Airport Road Elkton, Maryland 21921

More information

Development of Composite Bipolar Plates for PEMFC

Development of Composite Bipolar Plates for PEMFC Development of Composite Bipolar Plates for PEMFC 1. Introduction Polymer electrolyte membrane fuel cell (PEMFC) is a very promising power source for residential and mobile applications with its favorable

More information

Proceedings of the 14th International Middle East Power Systems Conference (MEPCON 10), Cairo University, Egypt, December 19-21, 2010, Paper ID 217.

Proceedings of the 14th International Middle East Power Systems Conference (MEPCON 10), Cairo University, Egypt, December 19-21, 2010, Paper ID 217. Proceedings of the 14th International Middle East Power Systems Conference (MEPCON 10), Cairo University, Egypt, December 19-21, 2010, Paper ID 217. Modeling and Analysis of a PEM Fuel cell for Electrical

More information

3D Modeling of a fuel cell stack in COMSOL Multiphysics and design of humidity con- trol system

3D Modeling of a fuel cell stack in COMSOL Multiphysics and design of humidity con- trol system 3D Modeling of a fuel cell stack in COMSOL Multiphysics and design of humidity control system IJCTA, 9(21), 2016, pp. 59-64 International Science Press 59 3D Modeling of a fuel cell stack in COMSOL Multiphysics

More information

Journal of Power Sources

Journal of Power Sources Journal of Power Sources 189 (2009) 1114 1119 Contents lists available at ScienceDirect Journal of Power Sources journal homepage: www.elsevier.com/locate/jpowsour Study on the processes of start-up and

More information

Effect of Operating Parameter on H2/CO2 Gas Separation using Electrochemical Cell

Effect of Operating Parameter on H2/CO2 Gas Separation using Electrochemical Cell Effect of Operating Parameter on H2/CO2 Gas Separation using Electrochemical Cell Fung Yun Ru 1, Nurul Noramelya Zulkefli 2, Nur Yusra Mt Yusuf 3 and Mohd Shahbudin Masdar 4,* 1,2,3,4 Department of Chemical

More information

I. Khazaee & M. Ghazikhani

I. Khazaee & M. Ghazikhani Experimental Characterization and Correlation of a Triangular Channel Geometry PEM Fuel Cell at Different Operating Conditions I. Khazaee & M. Ghazikhani Arabian Journal for Science and Engineering ISSN

More information

We are IntechOpen, the world s leading publisher of Open Access books Built by scientists, for scientists. International authors and editors

We are IntechOpen, the world s leading publisher of Open Access books Built by scientists, for scientists. International authors and editors We are IntechOpen, the world s leading publisher of Open Access books Built by scientists, for scientists 3,800 116,000 120M Open access books available International authors and editors Downloads Our

More information

A small mono-polar direct methanol fuel cell stack with passive operation

A small mono-polar direct methanol fuel cell stack with passive operation Available online at www.sciencedirect.com Journal of Power Sources 178 (2008) 118 124 A small mono-polar direct methanol fuel cell stack with passive operation Y.H. Chan, T.S. Zhao, R. Chen, C. Xu Department

More information

Optimization of porous current collectors for PEM water electrolysers

Optimization of porous current collectors for PEM water electrolysers Optimization of porous current collectors for PEM water electrolysers S. Grigoriev a, I. Baranov a, P. Millet b, Z. Li c, V. Fateev a a Hydrogen Energy and Plasma Technology Institute of Russian Research

More information

Designing and Building Fuel Cells

Designing and Building Fuel Cells Designing and Building Fuel Cells Colleen Spiegel Me Grauv Hill NewYork Chicago San Francisco Lisbon London Madrid Mexico City Milan New Delhi San Juan Seoul Singapore Sydney Toronto Foreword xii Chapter

More information

FABSTRACT. Technical Overview of Fuel Cell Systems: How Computer Simulation is Used to Reduce Design Time

FABSTRACT. Technical Overview of Fuel Cell Systems: How Computer Simulation is Used to Reduce Design Time W H I T E P A P E R - 1 2 0 FABSTRACT Fuel cells offer the means for the conversion of chemical energy in hydrogen rich fuels (fossil and renewable) directly to electricity without having to generate thermal

More information

Department of Mechanical Engineering, Tatung University, Taipei, 104, Taiwan

Department of Mechanical Engineering, Tatung University, Taipei, 104, Taiwan Int. J. Electrochem. Sci., 9 (214) 7819-7831 International Journal of ELECTROCHEMICAL SCIENCE www.electrochemsci.org Effect of Gas Diffusion Layer With Double-Side Microporous Layer Coating on Proton Exchange

More information

Supporting Information

Supporting Information Supporting Information Effect of water electrolysis catalysts on carbon corrosion in polymer electrolyte membrane fuel cells Sang-Eun Jang, Hansung Kim* Department of Chemical and Biomolecular Engineering,

More information

The Effect of Operating Parameters on the Performance of a Passive DMFC Single Cell

The Effect of Operating Parameters on the Performance of a Passive DMFC Single Cell World Applied Sciences Journal (4): 516-5, 013 ISSN 1818-495 IDOSI Publications, 013 DOI: 10.589/idosi.wasj.013..04.494 The Effect of Operating Parameters on the Performance of a Passive DMFC Single Cell

More information

Journal of Power Sources

Journal of Power Sources Journal of Power Sources 190 (2009) 216 222 Contents lists available at ScienceDirect Journal of Power Sources journal homepage: www.elsevier.com/locate/jpowsour An approach for determining the liquid

More information

An Investigation of GDL Porosity on PEM Fuel Cell Performance

An Investigation of GDL Porosity on PEM Fuel Cell Performance 37 A publication of VOL. 42, 2014 CHEMICAL ENGINEERING TRANSACTIONS Guest Editors: Petar Sabev Varbanov, Neven Duić Copyright 2014, AIDIC Servizi S.r.l., ISBN 978-88-95608-33-4; ISSN 2283-9216 The Italian

More information

Two-phase flow and transport

Two-phase flow and transport Two-phase flow and transport C.-Y. Wang Volume 3, Part 3, pp 337 347 in Handbook of Fuel Cells Fundamentals, Technology and Applications (ISBN: 0-471-49926-9) Edited by Wolf Vielstich Arnold Lamm Hubert

More information

ABSTRACT INTRODUCTION

ABSTRACT INTRODUCTION Geometrical analysis of Gas Diffusion Layer in a Direct Methanol Fuel Cell Low H.W., and Birgersson E. Engineering Science Programme National University of Singapore 10 Kent Ridge Road, Singapore 117546

More information

Real-time monitoring of internal temperature, flow rate and pressure in the high-temperature PEMFC stack using flexible integrated micro sensor

Real-time monitoring of internal temperature, flow rate and pressure in the high-temperature PEMFC stack using flexible integrated micro sensor Real-time monitoring of internal temperature, flow rate and pressure in the high-temperature PEMFC stack using flexible integrated micro sensor *Chi-Yuan Lee 1), Fang-Bor Weng 2), Yen-Ting Huang 3), Yen-Pu

More information

FAULT DETECTION BY TEMPERATURE BEHAVIOR ANALYSIS IN POLYMER ELECTROLYTE MEMBRANE FUEL CELLS

FAULT DETECTION BY TEMPERATURE BEHAVIOR ANALYSIS IN POLYMER ELECTROLYTE MEMBRANE FUEL CELLS Page 335 FAULT DETECTION BY TEMPERATURE BEHAVIOR ANALYSIS IN POLYMER ELECTROLYTE MEMBRANE FUEL CELLS Luis Alberto Martínez Riascos, luis.riascos@ufabc.edu.br David Dantas Pereira, david.pereira@ufabc.edu.br

More information

Analysis of Cell to Cell Voltage Variations in a 4-cell and 25- Cell Low Temperature PEM Stacks

Analysis of Cell to Cell Voltage Variations in a 4-cell and 25- Cell Low Temperature PEM Stacks International Conference on Renewable Energies and Power Quality (ICREPQ 16) Madrid (Spain), 4 th to 6 th May, 2016 exçxãtuäx XÇxÜzç tçw céãxü dâtä àç ]ÉâÜÇtÄ (RE&PQJ) ISSN 2172 038 X, No.14 May 2016 Analysis

More information

Pore network modelling for fuel cell diffusion media

Pore network modelling for fuel cell diffusion media Pore network modelling for fuel cell diffusion media A. Bazylak, V. Berejnov, D. Sinton and N. Djilali Department Dept. of Mechanical Engineering and Institute for Integrated Energy Systems, University

More information

PEM Fuel Cell Investigation at Chiang Mai University, Thailand

PEM Fuel Cell Investigation at Chiang Mai University, Thailand International Energy Journal: Vol. 4, No. 2, December 23 119 PEM Fuel Cell Investigation at Chiang Mai University, Thailand Konlayutt Chailorm *, Songwut Nirunsin **, and Thirapat Vilaithong ** * Department

More information

H-5000 Fuel Cell Stack. User Manual

H-5000 Fuel Cell Stack. User Manual H-5000 Fuel Cell Stack User Manual V1.3 Updated 16 June 2009 1 OVERVIEW OF THE STACK Thank you for choosing our fuel cell stack. The Horizon 5000W fuel cell stack is an air-cooled, light weight and compact

More information

Report On Adsorption/Desorption Studies of CO on PEM Electrodes Using Cyclic Voltammetry. Sethuraman, Vijay Anand

Report On Adsorption/Desorption Studies of CO on PEM Electrodes Using Cyclic Voltammetry. Sethuraman, Vijay Anand Report On Adsorption/Desorption Studies of CO on PEM Electrodes Using Cyclic Voltammetry Sethuraman, Vijay Anand I. AIM: The aim of this study is to calculate the adsorption and desorption rate constants

More information

MICRO FUEL CELLS for MOBILE POWER Thermal Management in Fuel Cells

MICRO FUEL CELLS for MOBILE POWER Thermal Management in Fuel Cells Thermal Management in Fuel Cells Jennifer Brantley Mechanical Engineer UltraCell Corporation 2/29/08 2/29/08 MEPTEC Thermal Symposium Session 4: Green 1 Agenda What is a Fuel Cell? Why Fuel Cells? Types

More information

Durability of MEA Prepared with PFA-g-PSSA Membrane for Direct Methanol Fuel Cell

Durability of MEA Prepared with PFA-g-PSSA Membrane for Direct Methanol Fuel Cell Durability of MEA Prepared with PFA-g-PSSA Membrane for Direct Methanol Fuel Cell D.-H. Peck, S. Kang, B.-R. Lee, D.-H. Jung This document appeared in Detlef Stolten, Thomas Grube (Eds.): 18th World Hydrogen

More information

Available online at ScienceDirect. Physics Procedia 69 (2015 )

Available online at  ScienceDirect. Physics Procedia 69 (2015 ) Available online at www.sciencedirect.com ScienceDirect Physics Procedia 69 (2015 ) 607 611 10 World Conference on Neutron Radiography 5-10 October 2014 Visualization of water accumulation process in polymer

More information

An In Situ Method for Determination of Current Distribution in PEM Fuel Cells Applied to a Direct Methanol Fuel Cell

An In Situ Method for Determination of Current Distribution in PEM Fuel Cells Applied to a Direct Methanol Fuel Cell Journal of The Electrochemical Society, 150 1 A79-A85 2003 0013-4651/2002/1501/A79/7/$7.00 The Electrochemical Society, Inc. An In Situ Method for Determination of Current Distribution in PEM Fuel Cells

More information

A self-regulated passive fuel-feed system for passive direct methanol fuel cells

A self-regulated passive fuel-feed system for passive direct methanol fuel cells Available online at www.sciencedirect.com Journal of Power Sources 176 (2008) 183 190 A self-regulated passive fuel-feed system for passive direct methanol fuel cells Y.H. Chan, T.S. Zhao, R. Chen, C.

More information

Dynamic Modeling and Analysis of PEM Fuel Cells for Startup from Subfreezing Temperatures

Dynamic Modeling and Analysis of PEM Fuel Cells for Startup from Subfreezing Temperatures Dynamic Modeling and Analysis of PEM Fuel Cells for Startup from Subfreezing Temperatures Mallika Gummalla, Nikunj Gupta, Shubhro Ghosh, Sergei Burlatsky, Patrick Hagans and Cynthia Rice United Technologies

More information

Performance characterization of passive direct methanol fuel cells

Performance characterization of passive direct methanol fuel cells Journal of Power Sources 167 (2007) 455 460 Short communication Performance characterization of passive direct methanol fuel cells R. Chen, T.S. Zhao Department of Mechanical Engineering, The Hong Kong

More information

Under-land Convection in a PEM Fuel Cell

Under-land Convection in a PEM Fuel Cell University of Miami Scholarly Repository Open Access Dissertations Electronic Theses and Dissertations 2012-07-11 Under-land Convection in a PEM Fuel Cell Hidetaka Taira University of Miami, htaira3@gmail.com

More information

Appendix A: Parameters that Used to Model PEM Fuel Cells

Appendix A: Parameters that Used to Model PEM Fuel Cells Appendix A: Parameters that Used to Model PEM Fuel Cells Name Value Description L 0.06[m] Cell 1ength H_ch 1e-3[m] Channel height W_ch 9.474e-3[m] Channel width W_rib 9.0932e-3[m] Rib width H_gdl 640e-6[m]

More information

Mass Transport Analysis of a PEM Fuel Cell (High Temperature-PEMFC) Under Different Operating Conditions

Mass Transport Analysis of a PEM Fuel Cell (High Temperature-PEMFC) Under Different Operating Conditions I J C T A, 9(37) 2016, pp. 577-581 International Science Press Mass Transport Analysis of a PEM Fuel Cell (High Temperature-PEMFC) Under Different Operating Conditions Deepti Suresh * and R. Bakiyalakshmi

More information

Diffusion layer parameters influencing optimal fuel cell performance

Diffusion layer parameters influencing optimal fuel cell performance . Journal of Power Sources 86 2000 250 254 www.elsevier.comrlocaterjpowsour Diffusion layer parameters influencing optimal fuel cell performance L.R. Jordan a, A.K. Shukla b, T. Behrsing c, N.R. Avery

More information

9-11 April 2008 Micro-electroforming Metallic Bipolar Electrodes for Mini-DMFC Stacks

9-11 April 2008 Micro-electroforming Metallic Bipolar Electrodes for Mini-DMFC Stacks 9-11 April 8 Micro-electroforming Metallic Bipolar Electrodes for Mini-DMFC Stacks R. F. Shyu 1, H. Yang, J.-H. Lee 1 Department of Mechanical Manufacturing Engineering, National Formosa University, Yunlin,

More information

Title. CitationJournal of Power Sources, 287: Issue Date Doc URL. Rights

Title. CitationJournal of Power Sources, 287: Issue Date Doc URL. Rights Title Impact of micro-porous layer on liquid water distrib polymer electrolyte membrane fuel cell Author(s)Tabe, Yutaka; Aoyama, Yusuke; Kadowaki, Kazumasa; Su CitationJournal of Power Sources, 287: 422-430

More information

The Effect of Bi-Polar Plate and Membrane Materials On Water Transport in PEMFCs

The Effect of Bi-Polar Plate and Membrane Materials On Water Transport in PEMFCs University of South Carolina Scholar Commons Theses and Dissertations 1-1-2013 The Effect of Bi-Polar Plate and Membrane Materials On Water Transport in PEMFCs Visarn Lilavivat University of South Carolina

More information

HFF 17,3. H. Ene Mathematical Institute, Romanian Academy of Sciences, Bucharest, Romania

HFF 17,3. H. Ene Mathematical Institute, Romanian Academy of Sciences, Bucharest, Romania The current issue and full text archive of this journal is available at www.emeraldinsight.com/0961-5539.htm HFF 302 Received 1 January 2006 Accepted 9 July 2006 A computational fluid dynamics analysis

More information

Study ofwater distribution and transport in a polymer electrolyte fuel cell using neutron imaging

Study ofwater distribution and transport in a polymer electrolyte fuel cell using neutron imaging Nuclear Instruments and Methods in Physics Research A 542 (2005) 134 141 www.elsevier.com/locate/nima Study ofwater distribution and transport in a polymer electrolyte fuel cell using neutron imaging N.

More information

Performance enhancement of a PEM fuel cell through reactant gas channel and gas. diffusion layer optimisation

Performance enhancement of a PEM fuel cell through reactant gas channel and gas. diffusion layer optimisation Performance enhancement of a PEM fuel cell through reactant gas channel and gas diffusion layer optimisation S. O. Obayopo, T. Bello-Ochende and J. P. Meyer Department of Mechanical and Aeronautical Engineering,

More information

Journal of Power Sources

Journal of Power Sources Journal of Power Sources 195 (2010) 3451 3462 Contents lists available at ScienceDirect Journal of Power Sources journal homepage: www.elsevier.com/locate/jpowsour Towards operating direct methanol fuel

More information

PARAMETRIC ANALYSIS ON INTERDIGITATED FLOW CHANNEL OF PEMFC PERFORMED BY TAGUCHI METHOD

PARAMETRIC ANALYSIS ON INTERDIGITATED FLOW CHANNEL OF PEMFC PERFORMED BY TAGUCHI METHOD PARAMETRIC ANALYSIS ON INTERDIGITATED FLOW CHANNEL OF PEMFC PERFORMED BY TAGUCHI METHOD Dr. V.LAKSHMINARAYANAN Department of Mechanical Engineering, B V Raju Institute of Technology, Narsapur, Telangana-

More information

Electronic circuit model for proton exchange membrane fuel cells

Electronic circuit model for proton exchange membrane fuel cells Journal of Power Sources 142 (2005) 238 242 Short communication Electronic circuit model for proton exchange membrane fuel cells Dachuan Yu, S. Yuvarajan Electrical and Computer Engineering Department,

More information

A LIQUID WATER MANAGEMENT STRATEGY FOR PEM FUEL CELL STACKS

A LIQUID WATER MANAGEMENT STRATEGY FOR PEM FUEL CELL STACKS A LIQUID WATER MANAGEMENT STRATEGY FOR PEM FUEL CELL STACKS By Trung Van Nguyen * Chemical & Petroleum Engineering Department The University of Kansas Lawrence, KS 66045 and Mack W. Knobbe TVN Systems,

More information

Sulfur Dioxide Crossover during the Production of Hydrogen and Sulfuric Acid in a PEM Electrolyzer

Sulfur Dioxide Crossover during the Production of Hydrogen and Sulfuric Acid in a PEM Electrolyzer B836 0013-4651/2009/1567/B836/6/$25.00 The Electrochemical Society Sulfur Dioxide Crossover during the Production of Hydrogen and Sulfuric Acid in a PEM Electrolyzer John A. Staser*,z and John W. Weidner**,z

More information

A Study of Stirred Tank Reactor Polymer Electrolyte Membrane Fuel Cell Stack Dynamics

A Study of Stirred Tank Reactor Polymer Electrolyte Membrane Fuel Cell Stack Dynamics A Study of Stirred Tank Reactor Polymer Electrolyte Membrane Fuel Cell Stack Dynamics Claire Woo April 21 st, 2006 Advisor: Professor Jay B. Benziger Submitted in partial fulfillment Of the requirements

More information

International Journal of Mechanical & Mechatronics Engineering IJMME-IJENS Vol:15 No:05 83

International Journal of Mechanical & Mechatronics Engineering IJMME-IJENS Vol:15 No:05 83 International Journal of Mechanical & Mechatronics Engineering IJMME-IJENS Vol:15 No:05 83 The Model Development of Gas Diffusion Layer for PEM Fuel Cell Dahiyah Mohd Fadzillah, Chin Lee Nee & Masli Irwan

More information

PEM fuel cell geometry optimisation using mathematical modeling

PEM fuel cell geometry optimisation using mathematical modeling Int. Jnl. of Multiphysics Volume 2 Number 3 2008 313 PEM fuel cell geometry optimisation using mathematical modeling Elena Carcadea 1, Ioan Stefanescu 2, Roxana E. Ionete 3, Horia Ene 4, Derek B. Ingham

More information

EXPERIMENTAL STUDY OF POLYMER ELECTROLYTE MEMBRANE FUEL CELLS USING A GRAPHITE COMPOSITE BIPOLAR PLATE FABRICATED BY SELECTIVE LASER SINTERING

EXPERIMENTAL STUDY OF POLYMER ELECTROLYTE MEMBRANE FUEL CELLS USING A GRAPHITE COMPOSITE BIPOLAR PLATE FABRICATED BY SELECTIVE LASER SINTERING EXPERIMENTAL STUDY OF POLYMER ELECTROLYTE MEMBRANE FUEL CELLS USING A GRAPHITE COMPOSITE BIPOLAR PLATE FABRICATED BY SELECTIVE LASER SINTERING Nannan Guo and Ming C. Leu Department of Mechanical and Aerospace

More information

Micro Fuel Cells Potential

Micro Fuel Cells Potential Mech 549 Nov. 6, 2007 Micro Fuel Cells Potential Longer Duration for equivalent weight & volume Energy Density Instant Charge Flat Discharge Low Self-Discharge Little Short-circuit protection required

More information

Supporting information

Supporting information Supporting information Low-Cost and Durable Bipolar Plates for Proton Exchange Membrane Electrolyzers P. Lettenmeier 1, R. Wang 2, R. Abouatallah 2, B. Saruhan 3, O. Freitag 3, P. Gazdzicki 1, T. Morawietz

More information

A novel electrode architecture for passive direct methanol fuel cells

A novel electrode architecture for passive direct methanol fuel cells Electrochemistry Communications 9 (27) 718 724 www.elsevier.com/locate/elecom A novel electrode architecture for passive direct methanol fuel cells R. Chen, T.S. Zhao * Department of Mechanical Engineering,

More information