fuel cell system design pdf

... afterburner, a fuel heat exchanger and an air heat exchanger As with any SOFC system, the performance of the INER SOFC system is dependent not only on the design and operating conditions of the fuel cell ... for power-generation systems with a high efficiency and low emissions is becoming an increasing concern Solid oxide fuel cells (SOFCs), which convert the chemical energy in fuels such as hydrogen, ... different input fuels, and therefore resolve many of the technical challenges associated with proton exchange membrane fuel cells (PEMFCs), which can use only hydrogen as the input fuel However,

Ngày tải lên: 05/09/2013, 16:10

... into the fuel cell system than is actually consumed, which establishes the relationship known as fuel cell stoichiometry, represented as λfuel = fuel feed / fuel consumed = H2 feed.The fuel efficiency ... etc.A fuel cell system (FCS) consists of essential components such as the fuel cell stack, air processing system—including a compressor and humidifier—fuel gas supply, and thermal management system ... in fuel cell systems and assessing their efficiencies For further details, refer to ASME PTC 50-2002 on Fuel Cell Power Systems Performance and DIN IEC 62282-3-2, which focuses on stationary fuel

Ngày tải lên: 01/10/2019, 09:47

... electrolyte and fuel used: phosphoric acid fuel cell (PAFC), molten carbonate fuel cell (MCFC), alkaline fuel cell (AFC), solid oxide fuel cell (SOFC), proton exchange membrane fuel cell (PEMFC), ... 34 Contents I Introduction 5 II PEM fuel cell system modeling 6 2.1 PEM fuel cell 6 2.2 System modeling 7 III Control design of the PEM fuel cell system 11 3.1 Sliding mode control approach ... 𝑖𝐿 R The output voltage of a fuel cell stack constitutes by 𝑁𝐹𝐶 fuel cells connected in series is given by: 𝑉𝑠𝑡= 𝑁𝐹𝐶𝑉𝑐𝑒𝑙𝑙 (12) 2.2 System modeling The PEM fuel cell system adopted in this study

Ngày tải lên: 11/06/2024, 22:02

... describe the fuel cell characteristics, fuel cell model seems to be aneffective way to simulate the fuel cell behavior Based on different fuel cell operatingmodes, different fuel cell behavior ... electrolyte used, fuel cells can be divided intofive types: PAFC (Phosphoric Acid Fuel Cell), AFC (Alkaline Fuel Cell), PEMFC(Proton Exchange Membrane Fuel Cell), MCFC (Molten Carbonate Fuel Cell) andSOFC ... diagram of fuel cell and energy storage system 178A.1 Experimental setup designed for testing on the effect of fuel cell current ripple 200A.2 Sketch of the generation of fuel cell current

Ngày tải lên: 14/09/2015, 14:09

... performance of air-breathing fuel cells However, these fuel cell designs have generally relied on traditional planar MEA architecture Because the majority of PEM fuel cell designs are based on planar ... the cell performance Such fuel cells have the potential to be significantly cheaper, smaller, and lighter than planar plate and frame fuel cells; they could also broaden the range of fuel cell ... future Small fuel cells have provided significant advantages in portable electronic applications over conventional battery systems However, the typical polymer electrolyte fuel cell system with

Ngày tải lên: 05/09/2013, 14:58

... performance of air-breathing fuel cells However, these fuel cell designs have generally relied on traditional planar MEA architecture Because the majority of PEM fuel cell designs are based on planar ... thickness of the cell (compacted-design) for increasing the volumetric power density of a fuel cell power supply A novel, simple to construct, air-breathing micro-structured PEM fuel cell which work ... future Small fuel cells have provided significant advantages in portable electronic applications over conventional battery systems However, the typical polymer electrolyte fuel cell system with

Ngày tải lên: 05/09/2013, 14:58

... using these measures such as RS and KPS, the trading systems presented in this book can be used as a platform to build better systems Make t h e systems your own, and you will have the confidence ... 505 Symbol OPWV ORBK ORCL OSIP OSIS OVER PAYX PB-CONT PCAR PCLN PCRATIO PCSA Description Openwave Systems Orbotech LTD Oracle Corp OSI Pharmaceuticals Inc OSI Sys Inc Overture Services Inc Paychex ... get a sense of the signals that will be triggered the following day Second, run each of the Acme systems unfiltered for the broad market and sector indices, e.g., the HOLDRS4 Finally, highlight

Ngày tải lên: 10/08/2014, 07:21

... miniaturized fuel cell systems The majority of research on micro-scale fuel cells is aimed at micro-power applications Performance of micro-fuel cells are closely related to many factors, such as designs ... reserved Keywords: PEM fuel cells; Micro fuel cell; Nature inspired flow channels; Electrochemical; Heat transfer; CFD Introduction Fuel cell system is an advanced power system for the future ... of fuel cells, the introduction of cheaper materials and fabrication techniques, and the design and development of novel architectures The difficult experimental environment of fuel cell systems

Ngày tải lên: 09/09/2015, 10:17

... R Reis, Designing Fault-Tolerant Techniques for SRAM-Based FPGAs, IEEE Design and Test of Computers, Nov.–Dec 2004, pp 552–562 [7] F Lima, L Carro, R Reis, Designing Fault Tolerant System into ... Architectures 133 A new design paradigm 1 Introduction to RCF Devices 134 2 The ReCoM Architecture 135 3 The Proposed System 108 4 Experimental Results 111 4.1 Compression System Results 112 ... published widely in the area of dependable systems and fault tolerance techniques and he is involved in research on dependable designs for aerospace and automotive systems as well as innova-tive biological

Ngày tải lên: 20/10/2021, 21:22

... HỌC BÁCH KHOA KHOA ĐIỆN-ĐIỆN TỬ BỘ MÔN KỸ THUẬT ĐIỆN TỬ Embedded System Design Chapter 3: Hardware design for an embedded system Trang 21Trang 3– Sensors: temperature, humidity, light, motion– ... Process tasks, functions, and algorithms – Interface other systems microprocessor Trang 6Bộ môn Kỹ Thuật Điện Tử Example of an embedded system 3Chapter 4 Trang 71 Hardware components• Microprocessors/Microcontrollers ... Trang 10Bộ môn Kỹ Thuật Điện Tử 5Actuator: relay Chapter 4 Trang 112 Design block diagram• Block diagram – Is a diagram of a system in which the principal parts or functions are represented by

Ngày tải lên: 24/10/2024, 17:20

... in PEM fuel cell design is a tubular-shaped fuel cell Fuel cell companies and research institutes may have carried out various systematic experimental studies for this type of the fuel cell, for ... exchange membranes used in fuel cells is a major factor in the operating lifetime of fuel cell systems The stresses distribution in the fuel cells is affected by operating point (cell voltage and related ... 2, 2010, pp.183-198 Introduction Fuel cell system is an advanced power system for the future that is sustainable, clean and environmental friendly Small fuel cells have provided significant advantages

Ngày tải lên: 05/09/2013, 14:58

... proton exchange membrane (PEM) fuel cell are accelerated by mechanical stresses arising during fuel cell assembly (bolt assembling), and the stresses arise during fuel cell running, because it consists ... leading to a fuel cell durability under various operating conditions Optimization study of a PEM fuel cell durability has been performed To achieve long cell life, the results show that the cell must ... two-dimensional model of fuel cell with hardening for analysis of mechanical stresses in MEA arising in cell assembly procedure The model includes the main components of real fuel cell (membrane, gas

Ngày tải lên: 05/09/2013, 14:58

... maintaining a tolerance to fuel impurities in the reformate feed. An important part of the fuel cell is the electrolyte, which gives every fuel cell its name. At the core of a PEM fuel cell is the polymer ... a proton exchange membrane fuel cell are accelerated by mechanical stresses arising during fuel cell assembly (bolt assembling), and the stresses arise during fuel cell running, because it consists ... membranes used in fuel cells is a major factor in the operating lifetime of fuel cell systems. Figure 3 shows the total displacement distribution at the upper and lower surface of the cell membrane,

Ngày tải lên: 05/09/2013, 14:58

... stresses; Nafion Trang 21 Introduction Fuel cell system is an advanced power system for the future that is sustainable, clean and environmental friendly Small fuel cells have provided significant advantages ... battery systems Competitive costs, instant recharge, and high energy density make fuel cells ideal for supplanting batteries in portable electronic devices However, the typical PEM fuel cell system ... portable-power applications In air-breathing PEM fuel cell, the cathode side of the cell is directly open to ambient air The oxygen needed by the fuel cell electrochemical reaction is taken directly

Ngày tải lên: 05/09/2013, 14:58

... damage mechanisms in a PEM fuel cell are accelerated by mechanical stresses arising during fuel cell assembly (bolt assembling), and the stresses arise during fuel cell running, because it consists ... to simulate the stresses inside the PEM fuel cell, which are occurring during fuel cell assembly (bolt assembling), and the stresses arise during fuel cell running due to the changes of temperature ... leading to a fuel cell durability for vehicular applications Copyright © 2012 International Energy and Environment Foundation - All rights reserved Keywords: Fuel cell vehicles; PEM fuel cells, Durability,

Ngày tải lên: 05/09/2013, 14:58

... design is a tubular-shaped fuel cell Fuel cell companies and research institutes may have carried out various systematic experimental studies for this type of the fuel cell, for different specific ... of fuel cells, the introduction of cheaper materials and fabrication techniques, and the design and development of novel architectures [2] The difficult experimental environment of fuel cell systems ... governing fuel cell behaviour Models that Trang 2include all parts of a fuel cell are typically two- or three-dimensional and reflect many of the physical processes occurring within the fuel cell

Ngày tải lên: 05/09/2013, 14:58

... exchange membrane (PEM) fuel cells without extensive calculations A fuel cell mathematical module has been designed and constructed to determine the performance of a PEM fuel cell The influence of ... PEM fuel cell stacks and optimization of fuel cell system integration and operation Copyright © 2013 International Energy and Environment Foundation - All rights reserved Keywords: PEM fuel cells; ... of fuel cells without extensive calculations The present model can be used to investigate the influence of process variables for design optimization of fuel cells, stacks, and complete fuel cell

Ngày tải lên: 05/09/2013, 14:58

... ideas together by developing a top-down design for a small CPU design, verify its func-tionality, verify that it can be synthesized, and implement the design in an FPGA device 12 Trang 2Reg0 ... Trang 112 Top-Level System Design In the last few chapters, we have discussed VHDL language features and the VHDL synthesis ... of these units communicate through a com-mon, 16-bit tristate data bus Top-Level System Operation The top-level design consists of the processor block and a memory block communicating through

Ngày tải lên: 29/09/2013, 19:20

... Trang 2and System DesignTrang 4and System DesignPekka Eskelinen Artech House, Inc. Boston • London www.artechhouse.com Trang ... DataEskelinen, Pekka Introduction to RF equipment and system design.—(Artech House radar library) 1 Radio—Equipment and supplies 2 Wireless communications systems—Design and struction 3 Radio frequency con-I ... RF system or device Both parameters are fundamentally defined during the initialdesign process although some of the designers may not recognize the fact [17] Some of the factors affecting system

Ngày tải lên: 05/11/2013, 12:15

... has graciously requested that I author this webcast on the Domain Name System or DNS I’d personally like to thank my excellent technical editors Bill Ralph of Naval Surface Warfare Center and ... Trang 1IP Behavior VI – SANS GIAC LevelTwo - ©2000, 2001 1IP Behavior VI Domain Name System (DNS) Hello again I am Judy Novak If you are taking the IP Behavior series in successive ... in this case, dns.my.com Generally, a default name server is chosen at the time the operating system is installed on a given client machine (on Unix machines the information is stored in the

Ngày tải lên: 09/12/2013, 17:15