• 제목/요약/키워드: PEMFC (Proton Exchange Membrane Fuel Cell)

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고분자 연료전지용 세공충진막의 제조 및 연료전지 특성 (Preparation of pore-filling membranes for polymer electrolyte fuel cells and their cell performances)

  • 최영우;박진수;이미순;박석희;양태현;김창수
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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    • pp.278-281
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    • 2009
  • Proton exchange membrane is the key material for proton exchange membrane fuel cells (PEMFC). Currently widely-used perfluorosulfonic acid membranes have some disadvantages, such as low thermal stability, easy swelling, excessive crossover of methanol and high price etc. Other membranes, including sulfonated polymer, radiation grafted membranes, organic-inorganic hybrids and acid-base blends, do not satisfy the criteria for PEMFC, which set a barrier to the development and commercialization of PEMFC. Pore-filling type proton exchange membrane is a new proton exchange membrane, which is formed by filling porous substrate with electrolytes. Compared with traditional perfluorosulfonic acid membranes, pore-filling type proton exchange membranes have many advantages, such as non- swelling, low methanol permeation, high proton conductivity, low cost and a wide range of materials to choose. In this research, preparation methodology of pore-filling membranes by particularly using all hydrocarbon polymers and fuel cell performances with the membranes are evaluated.

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고온형 고분자전해질연료전지용 MEA 개발 및 응용 (Development and Application of High Temperature Proton Exchange Membrane Fuel Cells)

  • 임태훈;김형준
    • 한국수소및신에너지학회논문집
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    • 제18권4호
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    • pp.439-445
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    • 2007
  • Proton exchange membrane Fuel Cells(PEMFCs) have been spotlighted because of their broad potential application for potable electrical devices, automobiles and residential usages. However, their utilization is limited to low temperature operation due to the electrolyte dehydration at high temperature. High temperature PEMFC operation offers high CO tolerance and easy water management. This review presents development of high temperature($120{\sim}200^{\circ}C$) PEMFC. Especially, PEMFC which is based on acid-doped PBI membrane is discussed.

고분자 전해질 연료전지 가시화 장치를 이용한 이상유동 현상 관찰 (Visualization of two-phae flow by using transparent Proton Exchange Membrane Fuel Cell)

  • 이동율;배중면
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2009년도 춘계학술대회 논문집
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    • pp.374-377
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    • 2009
  • The operating temperature of Proton Exchange Membrane Fuel Cell (PEMFC) usually has to be limited under $100^{\circ}C$ to maintain the proper ionic conductivity. Therefore, the only product from reaction, water, is in the liquid phase. Two-phase flow makes the flow phenomenon in the channel difficult to understand and predict. Water blocking in the PEMFC channel or the pore of Gas Diffusion Layer (GDL), called flooding, is known as the main effect of PEMFC degradation. To analyze two-phase flow, the PEMFC with transparent acrylic plate was used. Two-phase flow patterns were observed by varying the current density. When the PEMFC is mounted horizontally, water in the cathode is mainly transported on the interface between the channel and GDL.

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상대습도 변화에 따른 PEM Fuel Cell 내에서의 플러딩에 관한 실험적 연구 (Experimental studies on Flooding in the PEM Fuel Cell at various RH)

  • 김경록;한성호;안득균;최영돈
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2008년도 추계학술대회B
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    • pp.2385-2389
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    • 2008
  • This is the experimental research that tries to explain a variety of RH is how to affect the cell performance and the flooding phenomenon of proton exchange membrane fuel cell (PEMFC). A value of PH changes to 0%, 50% and 90% as its variation, either stoichiometric flow rate changes to 1.5, 2 and 4. Into the comparison between theoretical and experimental value, this study analyzes that a variety of PH is how 10 affect flooding in the cathode of the proton exchange membrane fuel cell. The effect of air stoichiometry, air humidity and different flow fields are also discussed in this paper This study has accomplished the measurement of performance as the variety of RH in the cathode of proton exchange membrane fuel cell, moreover it has recorded the visualization of flooding in the cathode with a high-speed micro camera.

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5 kW급 고분자 전해질 연료전지 스택의 운전 특성 (Operation Characteristics of 5 kW Class Proton-Exchange-Membrane Fuel Cell(PEMFC) Stack)

  • 김재동;이정운;박달영
    • 한국가스학회지
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    • 제11권1호
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    • pp.51-54
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    • 2007
  • 78개 셀의 전극유효 면적이 $295cm^{2}$인 고분자 전해질 연료전지(PEMFC) 스택의 운전특성과 CO 피독에 대한 영향을 조사하였다. 전류밀도 $325mA/cm^{2}$에서 출력 5.4kW를 6시간 유지시키는 동안 셀들의 전압편차는 2.3%로 매우 안정함을 보였다. 개질과정의 부산물로 생성되는 CO는 PEHFC의 성능에 중요한 영향을 끼치는 스택의 주 오염물질중의 하나이다. 시간에 따른 연속적인 CO 피독 실험(5-20ppm)은 스택의 피독과 재생과정의 route를 알 수 있었다.

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고분자 전해질 연료전지용 바이폴라 플레이트의 디자인에 관한 고찰 (A Study on the design of bipolar plate for proton exchange membrane fuel cell)

  • 윤정필;최장균;차인수;임중열
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2007년도 추계학술대회 논문집
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    • pp.39-42
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    • 2007
  • Hydrogen fuel cell is clean and efficient technology along with high energy densities. While there are many different types of fuel cells, the proton exchange membrane fuel cell stands out as one of the most promising for transportation and small stationary applications. This paper focuses on design of bipolar plate for proton exchange membrane fuel cell. The bipolar plate model is realistically and accurately simulated velocity distribution, current density distribution and its effect on the PEMFC system using CFD tool FLUENT.

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가정용 연료전지 운전 모드 해석을 위한 동특성 모델 개발 (A Dynamic Simulation Model for the Operating Strategy Study of 1 kW PEMFC)

  • 유상석;이영덕;홍동진;안국영
    • 한국수소및신에너지학회논문집
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    • 제19권4호
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    • pp.313-321
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    • 2008
  • Dynamics of the proton exchange membrane fuel cell is specially important when the system is frequently working on transient conditions. Even though the dynamics of proton exchange membrane fuel cell for residential power generation is less critical than that of PEMFC for transportation application, the system dynamics of PEMFC for RPG can be very important for daily start-up and stop. In particular, thermal management of the PEMFC for RPG is very important because the heat generation from electrochemical reaction is delivered to the home for hot water usages. Additionally, the thermal management is also very important for heat balance of the system and temperature control of the fuel cell. The objective of this study is to develop a dynamic system model for the study of PEMFC performance over various BOP options. Basic simulation results will be presented.

Dynamic Transient Phenomena of Proton Exchange Membrane Fuel Cell

  • Lee, Ying;Choi, Yong-Sung;Zhang, You-Sai;Lee, Kyung-Sup
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2010년도 춘계학술대회 논문집
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    • pp.9-9
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    • 2010
  • The proton exchange membrane fuel cell (PEMFC) holds great promise of clean power. However, in practical applications which use the PEMFC as the power source, the output voltage from the fuel cell undergoes transient response especially during acceleration and deceleration. This paper presents the relationships between the internal voltage drop, voltage of time constant, time constant of FC1 and FC2 (in series and in parallel) charge curves and discharge curves respectively.

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고분자막전해질 연료전지의 열관리 (Thermal Management of Proton Exchange Membrane Fuel Cell)

  • 유상석;김한석;이상민;이영덕;안국영
    • 한국수소및신에너지학회논문집
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    • 제18권3호
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    • pp.292-300
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    • 2007
  • A dynamic system model of a proton exchange membrane fuel cell(PEMFC) has been developed. The PEMFC of this study has large active area with water cooling in order to simulate the performance of the commercially viable PEMFC system for the transportation. A PEMFC stack model is a transient thermal model which is respond to the dynamic change of the coolant temperature and the flow rate. The dynamic cooling system model has been developed to determine the coolant flow rate and the coolant temperature. Prior to the system level study, thermal management criteria have been set up and brought to the control command of the cooling system. Since the system model is designed to evaluate the effect of thermal management on the system performance, it is attempted to determine the proper control algorithm of the cooling system so that the PEMFC system is working on the thermal management criteria. As a result of simulation, feedback controlled cooling system consumes less power and produce more power comparing with that of conventionally controlled cooling system.

고온형 고분자전해질 연료전지의 준3차원 모델링을 통한 국부적 동특성 해석에 관한 연구 (A Study on the Local Dynamic Characteristics of High Temperature Proton Exchange Membrane Fuel Cell by Quasi-three-dimensional Model)

  • 박재만;민경덕;강상규
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2011년도 추계학술대회 초록집
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    • pp.81.1-81.1
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    • 2011
  • High temperature proton exchange membrane fuel cell (HT-PEMFC) has been regarded as a promising clean energy sources. In this study, a quasi-three-dimensional dynamic model of HT-PEMFC has been developed and the local dynamic characteristics are investigated. The model has the geometrical simplification of 2+1D reduction (quasi-3D). The one-dimensional model consists of nine control volumes in cross-sectional direction to solve the energy conservation and the species conservation equations. Then, the one-dimensional model is discretized into 25 local sections along the gas flow direction to account for gas and thermal transport in channels. With this discretization, the local characteristics of HT-PEMFC such as species conservation, temperature, and current density can be captured. In order to study the basic characteristics of HT-PEMFC, it is important to investigate the local dynamic characteristics. Thus, the model is simulated at various operating conditions and the local dynamic characteristics related to them are observed. The model is useful to investigate the distribution of HT-PEMFC characteristics and the physical phenomena in HT-PEMFC.

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