國立臺南大學教師基本資料

基本資料
姓名 郭振坤
系所 綠色能源科技學系
職稱 教授
校內分機 7915
傳真 +886-6-260-2205
辦公室/研究室 榮譽校區-A103-1室
E-mail jenn.kun@gmail.com
網址 http://www.nutn.edu.tw/aertl/
專長/研究領域 氫能燃料電池系統研發、熱流系統研究、甲醇重組產氫研究、3D列印技術研究
 

畢業學校國別主修學門學位修業期間
國立成功大學中華民國機械工程研究所博士2004/9~2007/5

服務機關部門 / 系所職稱服務期間
台塑石化公司麥寮(海豐)火力發電廠工程主辦1998~2001
元砷光電公司LED製程部工程師2001~2002
國立中山大學機械與機電工程學系助教2002~2004
遠東科技大學機械工程系講師2004/8/1~2007/7/31
國立臺南大學綠色能源科技研究所助理教授2007/8/1~2010/01
國立臺南大學綠色能源科技學系助理教授2010/02~2011/07
國立臺南大學綠色能源科技學系副教授2011/08~2014/7
國立臺南大學綠色能源科技學系教授2011/8~2014/7
University of BirminghamMechanical Engineering訪問教授2013/7~2013/9
國立臺南大學綠色能源科技學系教授2014/8~迄今

著作
名稱(1) S.S. Hsieh, J.K. Kuo, C.F. Hwang, H.H. Tsai, “A novel design and microfabrication for a micro PEMFC” Microsystem Technologies 10 (2004) 121-126. (SCI) (IF: 1.025)
年度2004
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名稱(2) S.S. Hsieh, C.F. Hwang, J.K. Kuo,H.H. Tsai, “SU-8 flow field plates for a micro PEMFC” Journal of Solid State Electrochem 9 (2005) 121-131. (SCI) (IF: 1.821)
年度2005
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名稱(3) S.S. Hsieh, J.K. Kuo, S.H. Yang, C.F. Hwang, H.H. Tsai, “Study of operational parameters on the performance of micro PEMFCs with different flow fields” Energy Conversion & Management 47 (2006) 1868-1878. (SCI) (IF: 2.054)
年度2006
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名稱(4) C.K. Chen, J.K. Kuo, “Nylon 6/CB polymeric conductive plastic bipolar plates for PEM fuel cells” Journal of Applied Polymer Science 101 (2006) 3415-3421. (SCI) (IF: 1.2)
年度2006
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名稱(5) J.K. Kuo, C.K. Chen, “A novel Nylon-6-S316L fiber compound material for injection molded PEM fuel cell bipolar plates” Journal of Power Sources 162 (2006) 207-214. (SCI) (IF: 3.792)
年度2006
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名稱(6) J.K. Kuo, C.K. Chen, “Evaluating the enhanced performance of a novel wave-like form gas flow channel in the PEMFC using the field synergy principle” Journal of Power Sources 162 (2006) 1122-1129. (SCI) (IF: 3.792)
年度2006
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名稱(7) J.K. Kuo*, C.K. Chen, “The effects of buoyancy on the performance of a PEM fuel cell with a wave-like gas flow channel design by numerical investigation” International Journal of Heat and Mass Transfer 50 (2007) 4166-4179.(SCI) (IF: 1.947)
年度2007
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名稱(8) J.K. Kuo*, C.K. Chen, “Improvement of the performance of the gas flow channel in the PEM fuel cells,” Energy Conversion and Management.49(2008)2776-2787 (SCI)(IF:1.944)
年度2008
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名稱(9) Jenn-Kun Kuo*, Cai-Wan Chang-Jian, Cha’o-Kuang Chen, “Numerical investigation the Performance and Transport Phenomena of a Proton Exchange Membrane Fuel Cell with a Wavelike Gas Flow Channel Design”, Journal of Applied Polymer Science. Vol. 111, 1440-1448 (2009). (SCI) (IF:1.2)
年度2008
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名稱(10) Shiuh-Ming Chang*, Jenn-Kun Kuo, ” Injection molded PEM fuel cell bipolar plates structure”, Journal of Professional Mechanical Engineers, 2008, Vol.1, No.4, pp.14-20.
年度2008
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名稱(11) J.K. Kuo*, T.H. Yen, C.K. Chen," Three-dimensional numerical analysis of PEM fuel cells with conventional straight and wave-like gas flow fields channels" Journal of Power Sources 117 (2008) 96-103. (SCI)(IF: 3.792)
年度2008
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名稱(12) C. T. Lin, J. K. Kuo, T. H. Yen*, “Quantum Fluid Dynamics and Quantum Computational Fluid Dynamics”, Journal of Computational and Theoretical Nanoscience,Vol.6, No.5, 1090-1108 (2009) (SCI)(IF:0.9)
年度2009
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名稱(13) Cai-Wan Chang-Jian*, J.K. Kuo, “Bifurcation and chaos for porous squeeze film damper mounted rotor–bearing system lubricated with micropolar fluid,” Nonlinear Dynamics. 58, (2009) 697-741. (SCI) (IF:1.658)(30/105)
年度2009
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名稱(14) T.H. Yen, J.K. Kuo, Y.T. Yang*,"Comparison of Heat Transfer Coefficient in the Backward-Facing Step Flow with the LBM and Field Synergy Principle", Journal of the Chinese Society of Mechanical Engineers, Vol.30, No.2, 125~134 (2009) (SCI)(IF:0.656)
年度2009
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名稱(15) Shiuh-Ming Chang, Jenn-Kun Kuo*,"Simulation of PEM fuel cell gas flow field channel ", Journal of the Chinese Society of Mechanical Engineers, 2010, VO1.31 ,NO.6(SCI)(IF:06.56)
年度2010
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名稱(16) J.K. Kuo*“ Numerical investigation into thermofluidic and electrochemical characteristics of tubular-type SOFC“, Fuel Cells Vol.10 (2010) 463-471 (SCI)(IF:3.32)
年度2010
類別期刊論文
摘要Three-dimensional simulations based on a multi-physics model are performed to examine the thermofluidic and electrochemical characteristics of a tubular, anode-supported solid oxide fuel cell (SOFC). The simulations focus on the local transport characteristics of the cathode and anode gases and the distribution of the temperature field within the fuel cell. In addition, the electrochemical properties of the SOFC are systematically examined for a representative range of inlet gas temperatures and pressures. The validity of the numerical model is confirmed by comparing the results obtained for the correlation between the power density and the current density with the experimental results presented in the literature. Overall, the present results show that the performance of the tubular SOFC is significantly improved under pressurized conditions and a higher operating temperature.
關鍵字tubular; Solid Oxide Fuel Cell; numerical simulation
名稱(17) Jenn-Kun Kuo*,Pei-Hsing Huang, Shiuh-Ming Chang ,"Displacement Impact on PEM Fuel Cell Bipolar Plate for Fibre Orientation and Cooling System", Journal of the Chinese Society of Mechanical Engineers,Vol.32 (2011) 409-417. (SCI) (IF: 0.696) (通訊作者)
年度2011
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名稱(18) J.K.Kuo*, Jian-Kai Wang"Characteristic simulation and mass transfer of membrane electrode assembly in SOFC"Journal of Soild State Electrochemistry Vol.16 (2012) 329-340. (SCI)(IF:2.234) (通訊作者)
年度2011
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名稱(19) J.K. Kuo*, C.F. Wang, “An integrated simulation model for PEM fuel cell power systems with a buck DC-DC converter” International Journal of Hydrogen Energy, Vol.36 (2011) 11846-11855 (SCI) (IF: 4.053)(通訊作者)
年度2011
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名稱(20) Pei-Hsing Huang*, Jenn-Kun Kuo, "Thermal stretching of defective nanowires: the coupled effects of vacancy cluster defects, operating temperature, and wire cross-sectional area", Applied Physics A: Material Science & Processing, Vol.103,2010,1083-1092. (SCI) (IF: 1.595)
年度2011
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名稱(21) Chin-Tien Lin, Jenn-Kun Kuo, Tzu-Hsiang Yen "Three-dimensional molecular dynamics study of aperture shape effect on nanojet ejection", Journal of the Chinese Institute of Engineers, Journal of the Chinese Institute of Engineers, Vol.34, Issue 8, 1001-1011 (2011) (SCI (IF:0.225)
年度2011
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名稱(25) P.H. Huang*, J.K. Kuo, "Atomistic Simulations of Solid-state Pressure Welding of Metallic Nanowires", Applied Physics A, Accepted on 4 July 2012. (SCI)(IF:1.63)
年度2012
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名稱(26) Jenn-Kun Kuo*, Jenn-Jiang Hwang, Chin-Hong Lin,"Performance Analysis of a Stationary Fuel Cell Thermoelectric Cogeneration System", Fuel Cells, Vol.12 (2012) 1104-1114. (SCI)(IF:2.364)(通訊作者)
年度2012
類別期刊論文
摘要The main purpose of our study was to use an experimental method and system dynamic simulation technology to examine a proton exchange membrane fuel cell thermoelectric cogeneration system that provides both high-quality electric power and heated water. In the second part of our study, we experimentally verified the development of key components of the fuel cell and conducted a comprehensive analysis of the subsystems, including the fuel cell module, hydrogen supply subsystem, air supply subsystem, humidifier subsystem, and heat recovery subsystem. Finally, we integrated all of the subsystems into a PEM fuel cell thermoelectric cogeneration system and performed efficiency tests and analysis of power generation, heat recovery, and thermoelectric cogeneration. After comparing this system’s efficiency results using simulation and experimentation, we determined that the accuracy of the simulation values when compared to the experimental values was greater than 95%, showing that this system’s simulation nearly approached the efficiency of the actual experiment, including more than 53% for power generation efficiency, more than 39% for heat recovery efficiency, and more than 93% for thermoelectric cogeneration combined efficiency.
關鍵字Proton exchange membrane fuel cell thermoelectric cogeneration system; fuel cell thermoelectric cogeneration system dynamic simulation; heat recovery.
名稱(23) Jenn-Jiang Hwang , Yu-Jie Chen, Jenn-Kun Kuo*,"The Study on the Power Management System in a Fuel Cell Hybrid Vehicle", International Journal of Hydrogen Energy 37(2012) 4476-7789.(SCI)(IF:4.402)(通訊作者)
年度2012
類別期刊論文
摘要This paper presents a model of a hybrid electric vehicle, based on a primary proton exchange membrane fuel cell (PEMFC) and an auxiliary Li-ion battery, and its dynamics and overall performance. The power voltage from the fuel cell is regulated by a DC/DC converter before integrating with the Li-ion battery, which provides energy to the drive motor. The driving force for propelling the wheels comes from a permanent magnet synchronous motor (PMSM); where the power passes through the transmission, shaft, and the differential. The mathematical model, comprising the PEMFC, Li-ion battery, PMSM, and vehicular structure, was modeled in MATLAB/Simulink. A power management model was incorporated in the system such that the power output varies in different conditions; including high-power, low-power, standard-power, and charge modes. By changing the speed of the accelerator, the relation between the output of dual power supply, hydrogen consumption, and Li-ion battery’s state of charge was observed. The power management model is validated against the ECE40 driving cycle. The performance of the fuel cell hybrid vehicle is evaluated. The operation modes in the vehicle show a close match with the proposed power management system. Additionally, the hybrid ratio is measured to evaluate the overall efficiency. The results indicate that the hybrid ratio shows little correlation with efficiency. However, the higher the power of the fuel cell, the higher the hydrogen consumption.
關鍵字proton exchange membrane fuel cell, Li-ion battery, permanent magnet synchronous motor, power management, hybrid vehicle
名稱(24) J.J. Hwang , P.C. Wang, J.K. Kuo*,"Simulation of a Cogeneration System Based on Proton Exchange Membrane Fuel Cell", Fuel Cells, Volume 12 (2012) 326-334.(SCI)(IF:3.32) (通訊作者)
年度2012
類別期刊論文
摘要This project designs and simulates a cogeneration system of Proton exchange membrane fuel cell using Matlab/Simulink software and Thermolib heat module components. The system not only satisfies the need for electric power, but also provides heat recovery for future uses, thus increasing energy transfer efficiency. PEM fuel cell-based cogeneration system is introduced, including the hydrogen supply subsystem, air supply subsystem, load control subsystem, real-time monitoring block, and heat recovery subsystem. The complete fuel cell-based cogeneration system is constructed by assembling the fuel cell stack, fuel, coolant flow rate control system, and all the subsystems. In addition to the fuel cell experiment, influencing factors on the fuel cell-based system, such as the fuel inhale rate, coolant flow rate, system temperature, fuel humidification, thermal efficiency, electrical efficiency, and combined heat and power system efficiency, are analyzed and charted regarding different loads. In this system, with the power at 3 kW, the combined heat and power efficiency reaches 64 %. The combined heat and power efficiency is 76.6 % with the load power at 4 kW. When the power is at 5 kW, the thermal efficiency reaches 36.9 % and the combined heat and power efficiency reaches 82.9 %.
關鍵字Proton exchange membrane fuel cell, real-time monitoring, thermal efficiency, heat and power system
名稱(28)J.J. Hwang,W.R. Chang,J.K Kuo,W.Wu,"Experimental study on performance of a planar membrane humidifier for a proton exchange membrane fuel cell stack", Journal of Power Sources, Vol.215,2012,69-76. (SCI)(IF:4.951)
年度2012
類別期刊論文
摘要Experiments are conducted to evaluate the performance of aplanarmembranehumidifier for a PEM fuel cellstack. The humidification performance of the humidifier adopted here includes the dew point approach temperature (DPAT), water recovery ratio (WRR), and water vapor transfer rate (WVTR). Parametric studies involve the dry inlet temperature, the wet inlet dew point, and the flow rate across the humidifier. Results show that increasing the flow rate across the humidifier linearly increases its pressure drop. However, the DPAT increases sharply at high flow rates (>350 SLPM) due to the inadequate WVTR limited by the humidifier size. In addition, increasing the wet inlet dew point reduces the humidification performance by increasing the DPAT and reducing in the WRR. Moreover, an increase in the dry inlet temperature could reduce the DPAT at the low flow rate of 100 SLPM, but does not affect the DPAT at the high flow rate of 450 SLPM. Furthermore, the electrochemical performance of the stack–humidifier assembly is only 10% less than that of the stack tested on a commercial test station. Stability test reveals a satisfactory reliability of the present membranehumidifier as well.
關鍵字Fuelcell; Membranehumidifier; Dew point approach temperature; Water recovery ratio
名稱(29)Jenn-Kun Kuo*, Yuan-Yao Hsu,"Intelligent Control Scheme for the Prototype Stationary 1.0 kW PEM Fuel Cell System", International Journal of Green Energy,Vol.10(2013) 1086-1101. (SCI)(IF:2.069)(通訊作者)
年度2013
類別期刊論文
摘要The performance of polymer electrolyte membrane fuel cells (PEMFCs) is affected by many factors, including the relative humidity and pressure of the inlet gases, the temperature of the fuel cell stack, the transport of the reactants and byproducts, the dissipation of the reaction heat, and so on. Thus, to optimize the PEMFC performance over a range of operating conditions, the various components within the PEMFC system must be appropriately controlled. Accordingly, the present study proposes a sophisticated control system for a 1.0 kW PEMFC system comprising a fuel cell stack, an auxiliary power supply, a DC-DC buck converter and a DC-AC inverter. The control system is implemented using a programmable logic controller (PLC) and is designed to optimize the system performance and safety in both the start-up phase and the long-term operation phase. Uniquely, the control system is interfaced with a user-friendly human-machine interface, which not only permits the PEMFC system to be operated by individuals with no experience in the field, but also provides access to the controller via the Internet such that the system can be maintained and tuned by a qualified technician in a remote location. Overall, the PEMFC system and associated control scheme proposed in this study have considerable potential for commercialization as a reliable, low-cost solution for meeting the power supply requirements of small-scale residential and office users.
關鍵字PEMFC, PLC control system, human-machine interface
名稱(30)Jenn-Jiang Hwang*, Jenn-Kun Kuo, Wei Wu, Wei-Ru Chang, Chih-Hong Lin, Song-En Wang,"Lifecycle performance assessment of fuel cell/battery electric vehicles", International Journal of Hydrogen Energy 38(2013)3433-3446. (SCI)(IF:4.402)
年度2013
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名稱(31)Jenn-Kun Kuo*, Hsiang-Kuei Hsieh, "Research of flywheel system energy harvesting tehnology for fuel cell hybrid vehicles" Fuel Cells, Vol.13( 2013)1234-1241. (SCI)(IP:2.364)(通訊作者)
年度2013
類別期刊論文
摘要In this study, 2 fuel-cell hybrid systems for the energy performance comparison of fuel-cell hybrid vehicles (FCHVs) are presented. A Matlab/Simulink model was constructed, and the main power source was a fuel cell. A lithium battery and a flywheel battery were the auxiliary power sources. A vehicle driving test, FTP-75(Federal Test Procedure), was applied for 4 different control modes: mixed common output mode, normal driving charge mode, fuel-cell mode, and braking mode. FTP-75 simulated the energy requirements and energy output state of the full-motor hybrid system. The results show that the recovered energy of the flywheel battery was higher than that of the lithium battery, and the output power was close to the motor output curve. The flywheel battery can withstand rapid charging and discharging, which substantially reduces time and instantaneous motor current output. It can also effectively reduce the load on the motor. Finally, the flywheel battery enhanced the driving range of the hybrid vehicle to a greater degree than the lithium battery did under the same conditions. Energy consumption by 22.7% and the overall saving of 17.8 grams of hydrogen.
關鍵字 hybrid power system, fuel cell, lithium battery, flywheel battery, Federal Test Procedure -75
名稱(32)Jenn-Kun Kuo, Pei-Hsing Huang*, Wei-Te Wu, "Mechanical and fracture behaviors of defective silicon nanowires: combined effects of vacancy clusters, temperature, wire size, and shape" Applied Physics A, Accepted on 24 July 2013.(SCI)(IF:1.545)
年度2013
類別期刊論文
摘要The coupled effects of vacancy clusters (VCs), temperature, wire size, and geometry on the mechanical and fracture behaviors of defective silicon nanowires (Si NWs) were investigated using molecular dynamics modeling with Tersoff potential. The formation energies (Ev) of a monovacancy (3.933 eV) and a tetrahedron vacancy (10.189 eV) obtained in this study agree well with experimental results and ab initio calculation. Simulation results show that the slip deformations of defective Si NWs are triggered at the wire’s surface and edge due to the number of dangling bonds on the wire’s surface being much greater than that inside a vacancy defect. VC defects barely affect to the value of Young’s modulus, but substantially weaken the ultimate strength of wires with a small cross-sectional size. With decreasing wire size and increasing operation temperature, significant reductions in Young’s modulus and fracture strength were observed. The average Young’s modulus for square NWs was about 3.7 % higher than that of wires with a circular shape due to the surface facet effect. A brittle-toductile transition (BDT) occurred for [001]-oriented Si NWs with a lateral size ? 5.43 nm and an operation temperature T ? 300 K.
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名稱(27)Jenn-Kun Kuo*, Pei-Hsing Huang, Chi-Fa Wang,"Numerical Modeling and Analysis of PEMFC Integrated with Auxiliary Power Source", International Journal of Energy Research, Vol.37 (2013) 1635-1644 (SCI)(IF:1.987)(通訊作者)
年度2013
類別期刊論文
摘要A numerical model is developed of a stationary proton exchange membrane fuel cell (PEMFC) system comprising a PEMFC, a DC-DC buck converter, an auxiliary power supply (a lithium battery and supercapacitor), and a DC-AC inverter. The transient and steady-state performance of the PEMFC system is investigated by means of Matlab/Simulink simulations. It is shown that a good agreement exists between the simulated polarization curve of the PEMFC and the experimental results presented in the literature. In addition, it is shown that the DC-DC buck converter provides an effective means of stabilizing the output voltage of the PEMFC. Finally, the results confirm the effectiveness of the auxiliary power source in enabling the PEMFC to satisfy the peak load demand.
關鍵字proton exchange membrane fuel cell, DC-DC converter, transient output electrical power, supercapacitor, steady state
名稱(22) Jenn-Kun Kuo, Hung-Yi Li Wen-Chung Weng, Wei-Mon Yan, "Numerical investigation into transient response of proton exchange membrane fuel cell with serpentine flow field", Iernational Journal of Energy Research VOL.37 (2013)1302-1312.(SCI) (IF:2.122) (第一作者)
年度2013
類別期刊論文
摘要The transient response of a proton exchange membrane fuel cell (PEMFC) with a serpentine flow field design is investigated using a three-dimensional numerical model. The simulations consider three different flow field designs with 7, 11, and 15 bends, respectively. For the flow field design with 11 bends, three different channel width ratios are considered, namely 25%, 50%, and 75%. The channel width ratio is defined as the ratio of the channel width to the total channel/rib width. The simulation results show that for all of the flow field designs, an overshoot in the local current density occurs when the voltage is reduced instantaneously from 0.7 to 0.5V because of the high and uniform oxygen mass fraction. Conversely, a significant undershoot occurs when the voltage is increased instantaneously from 0.5 to 0.7V because of the low and nonuniform oxygen mass fraction. The overshoot and undershoot phenomena are particularly evident in the PEMFC with a 15-bend flow field. For the flow field design with 11 bends, the channel width ratio has little effect on the current density at an operating voltage of 0.7V. However, at an operating voltage of 0.5 V, the oxygen concentration into the catalyst and diffusion layers increases with the increasing channel width ratio, which leads to higher current density. As a result, a more significant overshoot phenomenon is observed in the flow field with a width ratio of 75%.
關鍵字serpentine; flow field design; transient characteristics; simulation; cathode
名稱(34)Jenn-Jiang Hwang, Chin-Hong Lin, Jenn-Kun Kuo*, "Performance analysis of fuel cell thermoelectric cogeneration system with methanol steam reformer", International Journal of Hydrogen Energy, Vol.39 (2014)14448-14459. (SCI)(IF:2.93)(通訊作者)
年度2014
類別期刊論文
摘要A MATLAB/Simulink model is constructed of a fuel cell thermoelectric cogeneration system fed by a methanol steam reformer. The major components within the simulation model include the fuel cell stack, the hydrogen and oxygen supply systems, the heat recovery system, and the methanol steam reformer. It is shown that the simulation results for the dynamic response of the fuel cell given a step change in the load are in good qualitative agreement with the experimental results. Moreover, the simulation results show that the proposed thermoelectric cogeneration system has a thermal efficiency of 35%, an electrical efficiency of 45.6%, and a combined heat and power efficiency of 80.6%. The numerical results for the system efficiency deviate by no more than 4.4% from the experimental results. Finally, it is shown both numerically and experimentally that the methanol conversion rate is greater than 99%.
關鍵字Proton exchange membrane fuel cell; Thermoelectric cogeneration system; Methanol steam reforming; Methanol conversion rate
名稱(33)Pei-Hsing Huang, Jenn-Kun Kuo*, Yuan-Yao Hsu, "Design and Implementation of 8051 Single-Chip Microcontroller for Stationary 1.0 kW PEM Fuel Cell System", Journal of Chemistry, Vol.762954 (2014)1-8.(SCI)(IF:0.622) (通訊作者)
年度2014
類別期刊論文
摘要Proton exchange membrane fuel cells (PEMFCs) have attracted significant interest as a potential green energy source. However, if the performance of such systems is to be enhanced, appropriate control strategies must be applied. Accordingly, the present study proposes a sophisticated control system for a 1.0?kW PEMFC system comprising a fuel cell stack, an auxiliary power supply, a DC-DC buck converter, and a DC-AC inverter. The control system is implemented using an 8051 single-chip microcontroller and is designed to optimize the system performance and safety in both the startup phase and the long-term operation phase. The major features of the proposed control system are described and the circuit diagrams required for its implementation introduced. In addition, the touch-sensitive, intuitive human-machine interface is introduced and typical screens are presented. Finally, the electrical characteristics of the PEMFC system are briefly examined. Overall, the results confirm that the single-chip microcontroller presented in this study has significant potential for commercialization in the near future.
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名稱(35)Jenn-Kun Kuo, Pei-Hsing Huang*, Wei-Te Wu, Chi-Ming Lu,"Mechanical and fracture behaviors of defective silicon nanowires: combined effects of vacancy clusters, temperature, wire size, and shape", Applied Physics A, Vol.114 (2014)1247-1256.(SCI)(IF:1.694) (第一作者)
年度2014
類別期刊論文
摘要The coupled effects of vacancy clusters (VCs), temperature, wire size, and geometry on the mechanical and fracture behaviors of defective silicon nanowires (Si NWs) were investigated using molecular dynamics modeling with Tersoff potential. The formation energies (E v ) of a monovacancy (3.933 eV) and a tetrahedron vacancy (10.189 eV) obtained in this study agree well with experimental results and ab initio calculation. Simulation results show that the slip deformations of defective Si NWs are triggered at the wire’s surface and edge due to the number of dangling bonds on the wire’s surface being much greater than that inside a vacancy defect. VC defects barely affect to the value of Young’s modulus, but substantially weaken the ultimate strength of wires with a small cross-sectional size. With decreasing wire size and increasing operation temperature, significant reductions in Young’s modulus and fracture strength were observed. The average Young’s modulus for square NWs was about 3.7 % higher than that of wires with a circular shape due to the surface facet effect. A brittle-to-ductile transition (BDT) occurred for [001]-oriented Si NWs with a lateral size?5.43 nm and an operation temperature T?300 K.
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名稱(35)Pei-Hsing Huang, Jenn-Kun Kuo*, Chun-Yen Huang, "A new application of the UltraBattery to hybrid fuel cell vehicles", International Journal of Energy Research, Vol.40 (2016) 146-159. (SCI)(IF:2.4)(通訊作者)
年度2015
類別期刊論文
摘要This study involves investigation of fuel cell hybrid vehicles. The main power source in the dynamic configuration is a proton exchange membrane fuel cell. An energy performance comparison is conducted between the use of a lithium-ion battery (Automotive Energy Supply Corporation, Japan) and the UltraBattery (Furukawa Battery Company, Japan) as auxiliary power sources. The MATLAB/Simulink for simulation is used to observe dynamic behavior and overall performance. This study describes the simulation frameworks of the proton exchange membrane fuel cell, ultracapacitor, lead–acid battery, and UltraBattery. Then, the Economic Commission for Europe 40 driving cycle is used to test and investigate the performance of the fuel cell hybrid vehicle. Four energy output models are adopted to simulate the energy demand and the energy motor output of the dual power source, namely the high-load demand, general demand, low-load demand, and charge models. The simulation results indicate that the lithium battery recycles 0.1% more work compared with the UltraBattery. Regarding fuel economy, the UltraBattery is only 0.1% inferior to the lithium battery. The expected cost of an UltraBattery with the same specifications is 35% less than that of a lithium battery. Considering fuel economy and cost simultaneously, the UltraBattery can compete with the lithium battery.
關鍵字fuel cell; Economic Commission for Europe 40; system simulation; UltraBattery; hybrid vehicle
名稱(36) Jenn-Kun Kuo*, Chung-Neng Huang, Tsung-Hung Lu, "Experimental investigation on heat transfer and pressure drop of ZnO/ethylene glycol-water nanofluids in transition", Applied Thermal Engineering, Vol. 93 (2016) 425-432. (SCI)(IF: 2.739)(第一作者)(通訊作者)
年度2015
類別期刊論文
摘要Light emitting diodes (LEDs) have many advantages, including a low power consumption, a long lifetime and a small size. However, at temperatures greater than 120 °C, a significant deterioration of the lamp body and packaging materials occurs. As a result, effective thermal management schemes are essential in maintaining the performance and reliability of high-power LED modules. One of the most common forms of LED cooling system is a heat sink consisting of an array of vertical fins designed in such a way as to optimize the heat dissipation efficiency through conduction, convection and radiation effects. In practice, the efficiency of such systems is largely dependent on the thermal conductivity of the fin material. Accordingly, the present study performs a numerical investigation into the cooling efficiency of a heat sink consisting of aluminum-graphite pin fins under ambient temperature conditions of 35 °C, 70 °C and 80 °C and natural convection air flow velocities of 0.5 ms−1, 2ms−1 and 4ms−1. The simulations assume the pin fins to be fabricated of aluminum-graphite composite material with graphite contents ranging from 0 to 90 vol.%. In general, the results confirm the effectiveness of graphite addition in improving the heat transfer performance of passive aluminum pin fin heat sinks. It is found that for all values of the ambient temperature and convection air flow velocity, the heat transfer performance improves as the graphite addition is increased from 0 to 60 vol.%. However, at higher values of the graphite concentration, only a minor further improvement in the heat transfer rate is obtained. Thus, it is inferred that a graphite content of 60 vol.% represents the optimal design for the present aluminum-graphite pin fins.
關鍵字LED, Heat sink, Pin fins, Aluminum-graphite composite material
名稱(38) Jenn-Kun Kuo, Pei-Hsing Huang*, Tzu-Hsiu Huang and Jheng-Yu Luo, "Adsorption behaviors of hydrogen sulphide on Au(110) nanoslit array surfaces using molecular dynamics simulations", Molecular Simulation, Vol.42 (2016) 1429-1436. (IF:1.678) (第一作者)
年度2016
類別期刊論文
摘要The adsorption behaviour of gas molecules on detector surfaces has a profound influence on the sensitivity of the detector. For this reason, this study used molecular dynamics simulation to explore the dynamic adsorption behaviour of hydrogen sulphide (H2S) molecules on various types of Au surfaces, including a planar Au(1 1 0) structure and three types of slit array structures. The influence of system temperature, adsorbate concentration and the slit width of nanoarrays on diffusivity, average adsorption energy and static adsorption amount were systematically examined. Simulation results indicate that the self-diffusivity of the adsorbate molecules increases with temperature but decreases with adsorbate concentration. At low concentrations (~3 mol/L), each type of Au(1 1 0) surface structure shows good capacity to adsorb all H2S molecules. With increasing concentration at 6.5 mol/L, the high concentration leads to adsorption saturation and many free H2S molecules in the planar Au(1 1 0) structure. Moreover, desorption also begins to appear on the planar structures at a temperature of 300 K (at 6.5 mol/L). The simulation results indicate that the columnar array structures with a slit width ≥5.76 Å allow molecules to swiftly spread into the slits and provide more stable adsorption sites (i.e. with a higher adsorption energy), which can effectively address the issues of high-temperature desorption and adsorption saturation. Particularly at low temperatures (≤100 K), slit structures presented a level of static adsorption of H2S that was 30% to 35 higher than that of planar structures.
關鍵字Hydrogen sulphide; gas sensor; molecular dynamics simulation; adsorption
名稱(37) Pei-Hsing Huang , Jenn-Kun Kuo*, Zong-Dain Wu, "Applying small wind turbines and a photovoltaic system to facilitate electrolysis hydrogen production",International Journal of Hydrogen Energy, Vol. 41, 2016, 8514-8524. (IF: 3.205) (通訊作者)
年度2016
類別期刊論文
摘要This study simulated hydrogen production scenarios for fuel cell electric vehicle (FCEV) hydrogen refueling stations by examining an electrolysis hydrogen production system powered by small wind turbines and a PV system. The simulation model was developed using MATLAB/Simulink to observe the effect of temperature on hydrogen flow and Faraday efficiency in the electrolyzer. In the simulation, the decentralized hybrid renewable energy system generated power used to produce hydrogen in the electrolyzer at an internal temperature of 40 °C, 60 °C, and 80 °C. The results of the simulation showed that electrolysis hydrogen production efficiency improved under two conditions: (a) when the 12 kW-rated power turbines operated simultaneously with the 18 kW PV system for a total power output of 30 kW; and (b) when the electrolyzer was heated to an operating temperature of 60 °C using the solar thermal collection system. If improvement in per second hydrogen flow can approach 0.1% compared to 40 °C, the system could produce 25 kg of hydrogen in the shortest time, at 49.2 hours and I-100 current density.
關鍵字Small wind turbine, PV system, Hydrogen refueling station, Electrolyzer hydrogen production, Faraday efficiency
名稱(39) Jenn-Kun Kuo, Pei-Hsing Huang*, Meng-Jun Guo, "Removal of CrMo alloy steel components from investment casting gating system using vibration-excited fatigue failure", The International Journal of Advanced Manufacturing Technology, Vol. 89, 2017, 101-111. (SCI)(IF:1.568) (第一作者))
年度2016
類別期刊論文
摘要In investment casting, the separation of cast components composed of strong, hard materials from the gating system is a delicate operation, which can incur considerable costs in terms of labor and tools. In this study, we substituted conventional grinder cutting with vibration-induced fatigue failure to facilitate the separation of chromium-molybdenum (CrMo) alloy steel components from an investment casting tree. This process involves the creation of V-shape notches on the ingate structure as well as modifications to component layout within the pattern tree. Vibration-excited dynamic experiments were performed to examine the effects of notch designs on stress concentration and cutting off at the ingates. Mold flow analysis was used to optimize the design of the pouring system to ensure casts of high quality. Finite element method (FEM) and experimental modal analysis (EMA) were conducted to predict the efficacy of the model and vibration characteristics. The application of harmonic response analysis to a casting tree model determined the maximum and minimum principal stresses at ingate notches. Once the stress values at the ingate notches were sufficient to ensure failure conditions, the same parameters were used to perform a final experiment for verification. Experiment results revealed that the breaks indeed occurred at the notches of the ingate. The proposed approach could be used as an alternative to conventional cutting using a grinding wheel as a means of reducing labor costs, increasing safety, and enhancing production efficiency.
關鍵字Investment casting, Mold flow, Shrinkage, Finite element, Vibration
名稱(40) Pei-Hsing Huang, Jenn-Kun Kuo*, Cheng-Yun Han, "Numerical investigation into slope-climbing capability of fuel cell hybrid scooter", Applied Thermal Engineering, Vol.110, 2017, 921-920. (SCI)(IF: 3.043) (通訊作者)
年度2017
類別期刊論文
摘要Fuel cell hybrid scooters provide an adequate performance on horizontal road surfaces, but perform less well when climbing slopes. In the present study, the slope-climbing capability of a fuel cell hybrid scooter is examined in simulations. The simulations focus specifically on the effects of the slope inclination angle, riding speed and rider weight on the power consumption, hydrogen consumption, and maximum travel range of the scooter. The validity of the numerical model is confirmed by comparing the numerical results for the power consumption of the scooter with the experimental and analytical results presented in the literature. The simulation results show that the power consumption and hydrogen consumption increase with an increasing slope inclination angle, riding speed and rider weight. Moreover, it is shown that given an initial hydrogen mass of 90 g, a constant riding speed of 40 km h-1, and a rider weight of 60 kg, the maximum travel range reduces from 47 km to 5 km as the slope inclination angle is increased from 0° to 40°. In general, the results presented in this study confirm that the proposed simulation model provides a valid means of characterizing the performance of a fuel cell hybrid scooter under typical urban riding conditions.
關鍵字fuel cell hybrid scooter; simulation; hydrogen consumption; slope inclination angle; travel range
名稱(41) Jenn-Kun Kuo, Pei-Hsing Huang*, Hsin-Yi Lai, Jian-Rong Chen, " Optimal gating system design for investment casting of 17-4PH stainless steel enclosed impeller by numerical simulation and experimental verification"The International Journal of Advanced Manufacturing Technology, Vol.92 (2017) 1093-1103. (SCI) (IF:2.209 ) ( 第一作者)
年度2017
類別期刊論文
摘要The impellers of centrifugal pumps are highly susceptible to the latent damage of corrosion and cavitation after long periods of transporting chemical fluids. To enhance the structural integrity and effective lifespan of impellers, this study applied mold flow analysis to the design of gating systems for 17-4PH stainless steel enclosed impellers. Our objective was to eliminate shrinkage and porous defects common in investment casting.We adopted various bottom, side, and top pouring systems with different pouring parameters to examine the behavior of the molten metal flow and solidification in the mold cavity. We designed a pressurized gating system with specific gating ratio to achieve a stable flow velocity at ingates. Physical sensors preset in the interior of the cavity were also used to detect thermodynamic behavior and analyze phase changes during casting simulations. The probability of shrinkage defect formation was assessed using the retained melt modulus (RMM) and the Niyama criterion. Experiments and nondestructive inspections show that optimizing the design of the gating system prevented surface shrinkage and interior defects. The improvements also reduced post-processing time and costs, increased yields, and enhanced casting quality.
關鍵字Investment casting, Mold flow analysis, Niyama criterion, Retained melt modulus, Riser , Shrinkage
名稱(42). Pei-Hsing Huang, Jenn-Kun Kuo*, Sie-Jhih Tsai , Yu-Chou, Tsai, “Evaporation analysis of different fuels in evaporator coil of steam reformer for stationary PEM fuel cell systems”, Applied Thermal Energy, Accepted on 2017.9.10. (SCI)(IF:3.356) (通訊作者)
年度2017
類別期刊論文
摘要Numerical simulations are performed to investigate the evaporation behavior of various fuels in the evaporator coil of the steam reformer used for hydrogen gas production purposes in a stationary proton exchange membrane (PEM) fuel cell system. The simulations consider five different fuels, namely three methanol-water mixtures (50%:50%, 62%:38% and 75%:25%), pure methanol, and pure ethanol, respectively. For all operating temperatures, the pure ethanol fuel exhibits the lowest flow rate due to its relatively higher dynamic viscosity. For the methanol-water fuel mixtures, the evaporation temperature increases from 473 K to 547 K as the methanol content increases from 50% to 75%. Moreover, the pure methanol and ethanol fuels have evaporation temperatures of 609 K and 713 K, respectively. Of the five fuels, the pure ethanol fuel achieves full vaporization (i.e., no water content) within the shortest flow distance (543 mm). Moreover, the outlet temperature of the vaporized ethanol (713 K) is the highest of the considered fuels. Overall, the simulation results indicate that pure ethanol yields the highest hydrogen production efficiency, and is therefore the most suitable fuel for the steam-reforming production of hydrogen gas in PEM fuel cell applications.
關鍵字steam reformer, methanol-water mixture, methanol, ethanol, evaporator coil
名稱S.S Hsieh, J.K. Kuo, and C.F. Huang, “A Novel Design and Microfabrication for Micro PEMFC,” Presented at the First International Conference on Fuel Cell Science, Engineering and Technology,April 21-23, 2003, Rochester, New York, USA.
年度2003
類別研討會
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名稱Jenn-Kun Kuo, Cha’o-Kuang Chen, “The field synergy principle and its applications in enhancing convective and heat transfer for PEM fuel cells”, 中國機械工程學會第二十三屆全國學術研討會,2006, A8-044,台南,臺灣。
年度2006
類別研討會
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名稱郭振坤*, 陳朝光, “The field synergy principle and its applications in enhancing convective and heat transfer for PEM fuel cells”, 中國機械工程學會第二十三屆全國學術研討, 24-25,11, 2006, 崑山科技大學, 台南,台灣.
年度2006
類別研討會
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名稱郭振坤*, 張簡才萬, 陳朝光, “利用場協同理論證明新型流道形狀對質子交換膜燃料電池性能增強之研究”, 中國機械工程學會第二十四屆全國學術研討, 23-24,11, 2007, 中原大學, 桃園,台灣.
年度2007
類別研討會
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名稱郭振坤*, 張簡才萬, 陳朝光, “流道形狀對質子交換膜燃料電池性能增強之研究”, 中華民國力學學會第三十一屆全國力學會議, 21-22,12, 2007, 義守大學,高雄,台灣.
年度2007
類別研討會
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名稱Jenn-Kun Kuo, Shiuh-Ming Chang, “Improvement of the performance the gas flow channel in the PEM fuel cells” Proceedings of ASCHT07 1st Asian Symposium on Computational Heat Transfer and Fluid Flow October 18-21, 2007, Xi’an, China.
年度2007
類別研討會
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名稱Jenn-Kun Kuo, Shiuh-Ming Chang, “Numericalinvestigation into the performance PEMFC with a wave-like gas flow channel design,” 2007.8.29., IASTED International Conference on Power and Energy Systems (EuroPES 2007), 582-031,Spain.
年度2007
類別研討會
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名稱Jenn-Kun Kuo, Cha’o-Kuang Chen, “Convective and heat transfer of PEM fuel cell with the field synergy principle” Proceedings of NCHEFC-2 The 2ST National Conference on Hydrogen Energy and Fuel Cell December 14-15, 2007, Taipei, Taiwan.
年度2007
類別研討會
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名稱Jenn-Kun Kuo, Shiuh-Ming Chang, “Numerical investigation into the performance PEMFC with a wave-like gas flow channel design” Proceeding of the Seventh IASTED, International Conference Power and Energy Systems August 29-31, 2007, Palma de Mallorca, Spain.
年度2007
類別研討會
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名稱Jenn-Kun Kuo, Shiuh-Ming Chang, “Convective and heat transfer of PEM fuel cell with the field synergy principle” HEAT 2008, Fifth International Conference on Transport Phenomena In Multiphase Systems June 30 - July 3, 2008, Bialystok, Poland.
年度2008
類別研討會
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名稱Jenn-Kun Kuo, Shiuh-Ming Chang, “Numerical analysis of PEM fuel cell gas flow field channel”7th International symposium on heat transfer 08, October 26-29, 2008, Beijing, China.
年度2008
類別研討會
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名稱Jenn-Kun Kuo, Shiuh-Ming Chang, “Compound material for injection molded PEM fuel cell bipolar plates”, IEEE ICSET 2008 CONFERENCE REGISTRATION SMU Conference Centre, 24 – 27 November 2008, Singapore.
年度2008
類別研討會
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名稱Jenn-Kun Kuo a, Cha’o-Kuang Chen, “Simulation of PEM fuel cell gas flowfield channel, 第三屆氫能與燃料電池研討會,FC075(2008),臺南大學,台南, 台灣.
年度2008
類別研討會
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名稱Jenn-Kun Kuo, Shiuh-Ming Chang, “Low-cost and light bipolar plates of PEM fuel cell”, Proceedings of the Inaugural US-EU-China Thermophysics Conference UECTC-RE ’09 May 28-30, 2009 Beijing, China.
年度2009
類別研討會
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名稱Shiuh-Ming Chang, Jenn-Kun Kuo*, “Field Synergy Principle to Square and Trapezoid Types Fuel Cell Bipolar Plate of Mold Injection”, 2010 Asia-Pacific Power and Energy Engineering Conference (APPEEC 2010), March 28-31, 2010, Chengdu, China.
年度2010
類別研討會
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名稱郭振坤*, 王建凱,"固態氧化物燃料電池膜電極組特性模擬與數值分析", 中國機械工程學會第二十七屆全國學術研討會, DD23-014,10-11,12, 2010, 國立台北科技大學,台北,台灣
年度2010
類別研討會
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名稱郭振坤*, 王琪發,"質子交換膜燃料電池動力系統之降壓型直流轉換器模擬與控制研究", 中國機械工程學會第二十七屆全國學術研討會, BB05-006,10-11,12, 2010, 國立台北科技大學,台北,台灣
年度2010
類別研討會
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名稱Jenn-Kun Kuo*, Yuan-Yao Hsu,"Intelligent control system for PEM fuel cell", 2010 The International Conference on Green Technologies (ICGT 2010), October 6-8, 2010,RN01, Pingtung, Taiwan. (NSC 99-2221-E-024-012) (國際研討會分區報告會議主持人)
年度2010
類別研討會
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名稱J.K. Kuo*, Y.Y. Hsu, S.M. Chang“INTEGRATED SYSTEM OF FUEL CELL FOR POLYMER EELECTROLYTE MEMBRANE”, IEEE Power Engineering and Automation Conference (PEAM 2011),0003-1888191, September 8-9, 2011 in Wuhan, China. (NSC 99-2221-E-024-012)
年度2011
類別研討會
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名稱J.K. Kuo*, S.S. Chung, “Characteristic simulation and numerical investigation of flow distribution in PEMFC”, The Eighth International Conference for Mescoscopic Methods in Engineering and Science (ICMMES), July 04~08, 2011, Lyon, France. (NSC 99- 2221 -E-024-012)
年度2011
類別研討會
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名稱J.K. Kuo*, C.F. Wang, “Simulation model for PEM fuel cell power systems with a buck DC-DC converter”, 2011 The International Conference on Green Technologies (ICGT 2011), October 12-15, 2011, Pingtung, Taiwan. (NSC 99-2221-E-024-012) (國際研討會分區報告會議主持人)
年度2011
類別研討會
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名稱郭振坤*, 許元耀, 韓承昀,謝享桂“燃料電池即時監控系統研製”, 第六屆氫能與燃料電池學術研討會, AF174, 10.28~29, 2011, 國立宜蘭大學, 宜蘭,台灣. (兩岸氫能研討會分區報告會議主持人)
年度2011
類別研討會
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名稱J.K. Kuo*,C.F. Wang,H.K. Hsieh, C.H. Lin,"Analysis of the steady enhancement from PEM fuel cell combines with a Super Capacitor", The First Multi Disciplines of Engineering on Advanced Technology and Environmentalism Design MDEATED International Conference,March 06~08,2012,Pattaya,Thailand
年度2012
類別研討會
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名稱J.K. Kuo*,J.J. Hwang,Y.J. Chen,C.Y. Han,S.E. Wang,"Simulate Four Modules of a Fuel Cell Hybrid System in a Vehicle", The First Multi Disciplines of Engineering on Advanced Technology and Environmentalism Design(MDEATED) International Conference,March 06~08,2012,Pattaya,Thailand
年度2012
類別研討會
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名稱J.K. Kuo*, Y.Y. Hsu, T.H. Yen,"Development and implementation of single-chip microcontroller for stationary PEM fuel cell system"Fundamentals & Development of Fuel Cells (FDFC2013) International Conference, April 16-18, 2013, Karlsruhe, Germany.
年度2013
類別研討會
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名稱Jenn Jiang Hwang, Ching Chang Cho, Jenn Kun Kuo,*, Chih Hong Lin,"Subsystem development with a regulated vacuum ejector for recirculation of the PEMFC", 20th World Hydrogen Energy Conference 2014, June15-20, 2014, Gwangju, Korea.
年度2014
類別研討會
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名稱Wen-Fan Chang, Cheng-Liang Hsu, Jenn-Kun Kuo, Yaw-Shyan Fu, Ming-Hung Liu, and ITseng Tang"A novel co-planar waveguide fed transparent antenna for Wi-Fi applications", ICICE International Conference, October 17-21, 2014, Guizhou, China.
年度2014
類別研討會
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名稱Jenn-Kun Kuo*, Chung-Neng Huang, Cheng-Yun Han,” Design and numerical analysis into slop-climbing capability of PEMFC scooter”, International Conference on Applied System Innovation (ICASI 2015), May 22-26, 2015, Osaka, Japan.
年度2015
類別研討會
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名稱Chung-Neng Huang, Jenn-Kun Kuo,Yui-Sung Chen, Ze-Si Huang, Chen-Chia Chuang, “Performance Improvement on Fuel Cell in a Vehicle via Magnetic Flywheel Control”, Committee of the 16th International Symposium on Advanced Intelligent Systems, November 4-7, 2015, Mokpo, Korea.
年度2015
類別研討會
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