• Title/Summary/Keyword: Fuel cell

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DEVELOPMENT OF FUEL CELL HYBRID ELECTRIC VEHICLE PERFORMANCE SIMULATOR

  • Park, C.;Oh, K.;Kim, D.;Kim, H.
    • International Journal of Automotive Technology
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    • v.5 no.4
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    • pp.287-295
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    • 2004
  • A performance simulator for the fuel cell hybrid electric vehicle (FCHEV) is developed to evaluate the potentials of hybridization for fuel cell electric vehicle. Dynamic models of FCHEV's electric powertrain components such as fuel cell stack, battery, traction motor, DC/DC converter, etc. are obtained by modular approach using MATLAB SIMULINK. In addition, a thermodynamic model of the fuel cell is introduced using bondgraph to investigate the temperature effect on the vehicle performance. It is found from the simulation results that the hybridization of fuel cell electric vehicle (FCEV) provides better hydrogen fuel economy especially in the city driving owing to the braking energy recuperation and relatively high efficiency operation of the fuel cell. It is also found from the thermodynamic simulation of the FCEV that the fuel economy and acceleration performance are affected by the temperature due to the relatively low efficiency and reduced output power of the fuel cell stack at low temperature.

Development of the Hydrogen Recirculation System for Fuel Cell Hybrid Vehicle (연료전지 하이브리드 자동차의 고효율 수소 재순환 시스템의 개발)

  • Kim, Min-Jin;Sohn, Young-Jun;Kim, Kyoung-Youn;Lee, Won-Yong
    • Transactions of the Korean hydrogen and new energy society
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    • v.19 no.2
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    • pp.118-123
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    • 2008
  • For the hydrogen recirculation system of the PEMFC (polymer electrolyte membrane fuel cell), the ejector is useful to improve the efficiency of the fuel cell system. However, conventional ejector does not keep its entrainment ratio good when the various power duties is required by the fuel cell system. In this study, the variable multi-ejector acceptable in the whole duty range required from the fuel cell hybrid mini-bus is developed. Consequently, the performance of the developed ejector is verified by the experiments based on the real operating conditions.

A Power Control Scheme of a Fuel Cell Hybrid Power Source

  • Song, Yu-Jin;Han, S.B.;Park, S.I.;Jeong, H.G.;Jung, B.M.;Kim, G.D.;Yu, S.W.
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2008.10a
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    • pp.183-187
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    • 2008
  • This paper describes a power control scheme to improve the performance of a fuel cell battery hybrid power source for residential application. The proposed power control scheme includes a power control strategy to control the power flow of the fuel cell hybrid power system and a digital control technique for a front-end dc-dc converter of the fuel cell. The power control strategy enables the fuel cell to operate within the high efficiency region defined by the polarization curve and efficiency curve of the fuel cell. A dual boost converter with digital control is applied as a front-end dc-dc converter to control the fuel cell output power. The digital control technique of the converter employs a moving-average digital filter into its voltage feedback loop to cancel the low frequency harmonic current drawn from the fuel cell and then limits the fuel cell output current to a current limit using a predictive current limiter to keep the fuel cell operation within the high efficiency region as well as to minimize the fuel cell oxygen starvation.

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Development of An Accelerated Durability Test Mode for Fuel Cell (연료전지 가속내구모드 개발)

  • LEE, YONGHEE;OH, DONGJO;JEON, UISIK;LEE, JONGHYUN
    • Transactions of the Korean hydrogen and new energy society
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    • v.26 no.5
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    • pp.493-498
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    • 2015
  • The fuel cell vehicle is a type of hydrogen vehicle which uses a fuel cell to produce electricity, powering its on-board electric motor. The fuel cell vehicle driving principle is completely different from the internal combustion engine vehicle. In order to ensure the durable quality of the fuel cell vehicle, durability test mode considering the characteristics of the fuel cell must be developed. In this study, we derived the durability test mode profile through collecting and analyzing fuel cell vehicle driving data. Then, the accelerated durability test mode is developed by adding degradation conditions and is experimentally validated to have an acceleration factor of 5~6.

Analysis of Solid Oxide Fuel Cell/Oxy-fuel Combustion Power Generation System Using Oxygen Separation Technology (산소분리기술을 사용한 연료전지/순산소연소 발전시스템 해석)

  • Park, Sung-Ku;Kim, Tong-Seop;Sohn, Jeong-Lak;Lee, Young-Duk
    • 한국신재생에너지학회:학술대회논문집
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    • 2008.10a
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    • pp.51-54
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    • 2008
  • This study aims to devise and analyze a power generation system combining the solid oxide fuel cell and oxy-fuel combustion technology. The fuel cell operates at an elevated pressure, a constituting a SOFC/gas turbine hybrid system. Oxygen is extracted from the high pressure cathode exit gas using ion transport membrane technology and supplied to the oxy-fuel power system. The entire system generates much more power than the fuel cell only system due to increased fuel cell voltage and power addition from oxy-fuel system. More than one third of the power comes out of the oxy-fuel system. The system efficiency is also higher than that of the fuel cell only system. Recovering most of the generated carbon dioxide is major advantage of the system.

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FUEL CELL ELECTRIC VEHICLES: RECENT ADVANCES AND CHALLENGES - REVIEW

  • Yang, W.C.
    • International Journal of Automotive Technology
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    • v.1 no.1
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    • pp.9-16
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    • 2000
  • The growing concerns on environmental protection have been constantly demanding cleaner and more energy efficient vehicles without compromising any conveniences provided by the conventional vehicles. The recent significant advances in proton-exchange-membrane (PEM) fuel cell technology have shown the possibility of developing such vehicles powered by fuel cells. Several prototype fuel cell electric vehicles (FCEV) have been already developed by several major automotive manufactures, and all of the favorable features have been demonstrated in the public roads. FCEV is essentially a zero emission vehicle and allows to overcome the range limitation of the current battery electric vehicles. Being motivated by the laboratory and field demonstrations of the fuel cell technologies, variety of fuel cell alliances between fuel cell developers, automotive manufactures, petroleum companies and government agencies have been formed to expedite the realization of commercially viable FCEV. However, there still remain major issues that need to be overcome before it can be fully accepted by consumers. This paper describes the current fuel cell vehicle development status and the staggering challenges for the successful introduction of consumer acceptable FCEVS.

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Advanced Interchangeable Dynamic Simulation Model for the Optimal Design of a Fuel Cell Power Conditioning System

  • Kim, Jong-Soo;Choe, Gyu-Yeong;Lee, Byoung-Kuk;Shim, Jae-Sun
    • Journal of Electrical Engineering and Technology
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    • v.5 no.4
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    • pp.561-570
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    • 2010
  • This paper presents an advanced dynamic simulation model of a proton exchange membrane fuel cell for the optimal design of a fuel cell power conditioning system (FC-PCS). For the development of fuel cell models, the dynamic characteristics of the fuel cell are considered, including its static characteristics. Then, software fuel cell simulation is realized using Matlab-Simulink. Specifically, the design consideration of PCS (i.e., power semiconductor switch, capacitor, and inductor) is discussed by comparatively analyzing the developed simulator and ideal DC source. In addition, a cosimulation between the fuel cell model and PCS realized using the PSIM software is performed with the help of the SimCoupler module. Detailed analysis and informative simulation results are provided for the optimal design of fuel cell PCS.

Design and Performance Evaluation for a Fuel Cell/Battery Hybrid Mini-Bus Based on a Simulation (시뮬레이션 기반 연료전지/2차전지 하이브리드 미니버스의 설계 및 성능 평가)

  • Kim, Min-Jin;Kong, Nak-Won;Lee, Won-Yong;Kim, Chang-Soo
    • Transactions of the Korean hydrogen and new energy society
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    • v.18 no.1
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    • pp.60-66
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    • 2007
  • In terms of the vehicle efficiency, a fuel cell hybrid system has advantages compared to a conventional internal combustion engine and a fuel cell alone-powered system. The efficiency of the fuel cell hybrid vehicle mainly depends on the maximum power of the fuel cell and therefore it is important to decide the design value of the fuel cell maximum power. In this paper, to estimate the performance of the fuel cell hybrid mini-bus in the design phase the simulator based on the models for the fuel cell stack, the electric battery, the fuel cell balance of plant, the controller, and the vehicle itself is proposed. Additionally, the hybrid mini-bus efficiencies with several different fuel cell powers are simulated for a city driving schedule and are compared on another. Consequently, the proposed simulation scheme is useful to determine the best design value of the fuel cell hybrid vehicles.