• Title/Summary/Keyword: Fuel Cell Electric Vehicle(FCEV)

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A Study on Electronically Controlled R-134a Heat Pump System for a Fuel Cell Electric Vehicle (FCEV) (연료전지 자동차용 R-134a 전동식 히트펌프 시스템 개발에 관한 연구)

  • Lee, Jun-Kyoung;Lee, Dong-Hyuk;Won, Jong-Phil
    • Transactions of the Korean Society of Automotive Engineers
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    • v.15 no.3
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    • pp.124-132
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    • 2007
  • The main objective of this work is to investigate the characteristics of a heat pump system for fuel cell electric vehicle (FCEV). The present heat pump system adopts an electrically driven compressor running with R134a and uses the heat from the fuel cell stack as the heat source for the exterior heat exchanger. The experimental work has been done with various operating conditions such as different compressor speeds, fuel cell stack coolant temperatures and flow rates. The heating capacity was measured to be from 4 to 10 kW at $-20^{\circ}C$ ambient temperature, and the outlet temperature of interior heat exchanger was up to $70^{\circ}C$. After 30 seconds from start-up, the system reached a steady state and the heating capacity of 6.8 kW was acquired, and after 90 seconds, the air outlet temperature of interior heat exchanger became $35^{\circ}C$.

Aerodynamic Design of Cathode Air Blower for Fuel Cell Electric Vehicle (연료전지 차량용 공기 블로워의 공력 설계)

  • Kim, Woo-June;Park, Chang-Ho;Jee, Yong-Jun;Cho, Kyung-Seok;Kim, Young-Dae;Park, Se-Young;Oh, Chang-Hoon
    • 한국신재생에너지학회:학술대회논문집
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    • 2007.11a
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    • pp.197-200
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    • 2007
  • FCEV uses electric energy generated from fuel cell stack, thus all consisting parts must be re-designed to be suitable for electricity based system. Cathode air blower which supplies compressed air into fuel cell stack has similar shape of turbocharger, but a radial turbine of traditional turbocharger is removed and high speed BLDC motor is installed . Generally, maximum 10% of electric power of fuel cell stack is consumed in air blower, therefore an effective design of air blower can improve the performance of FCEV directly. This study will present an aerodynamic design process of an air blower and compare computational results with experimental data.

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Dynamic Analysis of FCEV Turbo Blower (FCEV Turbo Blower 의 동특성 해석)

  • Yook, Ji-Yong;Yang, Hyun-Sub;Lee, Chang-Ha;Jo, Kyung-Suk;Park, Yong-Sun;Kwon, Hyuk-Ryul
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2010.10a
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    • pp.599-606
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    • 2010
  • This paper presents dynamic analysis of FCEV (Fuel Cell Electric Vehicle) Turbo Blower. To analyze the dynamic characteristics of Turbo Blower, finite element model which consists of solid elements is constructed. Evaluation of stress for safety of rotor sleeve due to centrifugal force, Shrink fit analysis in maximum rotation speed is performed. Rotor dynamic analysis of Turbo blower is conducted using Campbell diagram and FEA (Finite element analysis) results are compared with experimental results to evaluate of validity of finite element model. To evaluate of Structure vibration characteristics, Modal analysis and forced vibration analysis are performed through FEA and experiment.

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Engine Room Layout Design Optimization of Fuel Cell Vehicle Using CFD Technique (CFD를 이용한 연료전지 차량 레이아웃 최적화)

  • Kim, Jung-Ill;Jeon, Wan-Ho;Cho, Jang-Hyung
    • Transactions of the Korean Society of Automotive Engineers
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    • v.19 no.4
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    • pp.99-106
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    • 2011
  • This paper deals with engine room layout design optimization of fuel cell electric vehicle (FCEV), which has been proposed as a potential alternative to fossil fuel depletion. Investing the great R&D efforts, the global vehicle manufacturers, especially Honda motor corporate, have shown not prototype vehicle but commercial vehicle using fuel cell in the market recently. In this paper, we analyze cooling performance and flow characteristic in the engine room of newly FCEV, in addition we suggest the optimization process for engine room layout design optimization. The two radiators in the vehicle for fuel cell stack and electronic components cooling have been analyzed and their performance are obtained in terms of cooling performance ratio (CPR). The value of CPR should always be less than one and based on criteria, we have achieved the optimum cooling performance of radiators for stack and electronic components. Aerodynamic performance is evaluated in terms of drag coefficient, improved through underbody modification using air devices.

An Integrated Humidification System for a Fuel Cell Vehicle (연료전지 자동차용 복합형 가습시스템에 관한 연구)

  • Kim, Hyun-Yoo;Kwon, Hyuck-Ryul;Seo, Sang-Hoon;Park, Yong-Sun;Ahn, Byung-Ki
    • Journal of Hydrogen and New Energy
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    • v.21 no.6
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    • pp.547-552
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    • 2010
  • In this study, we suggested an integrated humidification system for a fuel cell electric vehicle (FCEV) as an efficient method of humidification under the various driving condition of the fuel cell vehicle and system. It is improving air humidification system combined the existing membrane humidifier and water injection. As a result, we verified it through experiments and the vehicle test and could get a result of improvement of humidification performance. The results show that an integrated humidification system is a useful method for FCEV applications.

Reduction of Current Distortion in PWM Inverter by Variable DC-link Voltage of DC-DC Converter for FCEV (FCEV 구동용 DC-DC 컨버터 가변 DC-link 전압 제어에 의한 PWM 인버터의 전류 왜곡 저감)

  • Ko, An-Yeol;Kim, Do-Yun;Lee, Jung-Hyo;Kim, Young-Real;Won, Chung-Yuen
    • The Transactions of the Korean Institute of Power Electronics
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    • v.19 no.6
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    • pp.572-581
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    • 2014
  • A design and control method of DC/DC converter, which can control variable DC-link voltage to drive a fuel cell electric vehicle (FCEV), is proposed in this study. Given that a fuel cell has low-voltage and high-current characteristics, the required voltage for operating motor must be output through the DC/DC boost converter in the system to drive an FCEV. The proposed converter can choose the output voltage of battery or fuel cell in consideration of the driving mode, as well as control DC-link voltage in accordance with the back electromotive force. The switching lag-time to prevent shortage of pulse-width modulation inverter arms makes distorted current waveform caused by voltage distortion. Through this control method, the proposed converter can reduce the output voltage distortion and current ripple of the inverter, thereby reducing the distorted torque. Simulations and experimental results are presented to verify the reliability of the proposed DC/DC converter.

Numerical Analysis of Electromagnetic Radiation Characteristics by High Voltage and General Cables for Fuel Cell Electric Vehicle (FCEV) (수소 연료전지 차량용 고전압 케이블과 일반 케이블에 의한 차량 전자파 방사 특성 수치해석 연구)

  • Lee, Soon-Yong;Seo, Won-Bum;Lim, Ji-Seon;Choi, Jae-Hoon
    • Journal of Hydrogen and New Energy
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    • v.22 no.2
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    • pp.152-160
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    • 2011
  • The electromagnetic characteristics of FCEVs (fuel cell electric vehicles) are much different from the existing combustion engine cars as well as hybrid, plug-in-hybrid, and pure electric vehicles due to the high voltage/current generated by a fuel cell stack which uses a compressed hydrogen gas reacted with oxygen. To operate fuel cell stack efficiently, BOP (Balance of Plant) which is consisted of many motors in water pump, air blower, and hydrogen recycling pump as well as inverters for these motors is essential. Furthermore, there are also electric systems for entertainment, information, and vehicle control such as navigation, broadcasting, vehicle dynamic control systems, and so on. Since these systems are connected by high voltage or general cables, EMC (Electromagnetic compatibility) analysis for high voltage and general cable of FCEV is the most important element to prevent the possible electric functional safety errors. In this paper, electromagnetic fields by high voltage and general cables for FCEVs is studied. From numerical analysis results, total time harmonic electromagnetic field strength from high voltage and general cables have difference of 13~16 dB due to ground effect by impedance matching. The EMI results of FECV at 10 m distance shows difference of 41 dB at 30 MHz and 54 dB at 230 MHz compared with only general cable routing.

High Voltage Wiring System Evaluation Methode of FCEV (Fuel Cell Electric Vehicle) (수소연료전지 자동차용 고전압 배선 시스템 평가 기술 개발)

  • Lim, Ji-Seon;Lee, Jeong-Hun;Lee, Hyo-Jeong;Na, Joo-Ran
    • Journal of Hydrogen and New Energy
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    • v.23 no.4
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    • pp.330-336
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    • 2012
  • FCEV uses 250 ~ 450 V instead of using 12 V battery. High voltage vehicle can cause electric shock, fire and explosion accident. Therefore, it has potential factors that can cause hazard of safety for users. United states of America and Europe legislate regulations such as ECE R100, FMVSS 305 for regulating electrical safety during driving or after collision. The company manufacturing high voltage components must do advanced R&D about Method for improving and confirming the safety of high voltage. We develop the specific hardware components of high voltage wiring system for the power train system and power supply system of Hyundai Motors FCEV. This paper shows test method of insulative performance for securing the electrical safety of high voltage components such as power cable, connectors and buss-bar, and proposals the guide line value for human safety of FCEV according to the test result of our development components.

Measurements and Numerical Analysis of Electric Cart and Fuel Cell to Estimate Operating Characteristic of FCEV (연료전지 자동차의 주행성능 예측을 위한 전기자동차 및 연료전지의 성능실험과 수학적 모델링)

  • Cho, Yong-Seok;Kim, Duk-Sang;An, Seok-Jong
    • Transactions of the Korean Society of Automotive Engineers
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    • v.14 no.5
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    • pp.65-72
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    • 2006
  • In new generation vehicle technologies, a fuel cell vehicle becomes more important, by virtue of their emission merits. In addition, a fuel cell is considered as a major source to generate the electricity for vehicles in near future. This paper focuses on modeling of not only an electric vehicle and but also a fuel cell vehicle to estimate performances. And an EV cart is manufactured to verify the modeling. Speed, voltage, and current of the vehicle and modeling are compared to estimate them at acceleration test and driving mode test. The estimations are also compared with the data of the Ballard Nexa fuel cell stack. In order to investigate a fuel cell based vehicle, motor and fuel cell models are integrated in a electric vehicle model. The characteristics of individual components are also integrated. Calculated fuel cell equations show good agreements with test results. In the fuel cell vehicle simulation, maximum speed and hydrogen fuel consumption are estimated. Even though there is no experimental data from vehicle tests, the vehicle simulation showed physically-acceptable vehicle characteristics.

Design Characteristics on Electric Drivetrain for Electric Vehicle Based on Driving Performance

  • Park, Ji-Seong;Jung, Sang-Yong
    • Journal of IKEEE
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    • v.13 no.3
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    • pp.47-54
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    • 2009
  • Design consideration on electric drivetrain(E-D/T), usually referred as electric motor for driving, its compatible reduction gear, and inverter, are performed for developing electric vehicle(EV) with efficient driving performance. Universal mode of driving cycle has been used to make up the actual vehicle performance, and its results are incorporated to the design of E-D/T.

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