390 results found
Maher RC, Duboviks V, Offer G, et al., 2013, In-operando Raman Characterization of Carbon Deposition on SOFC Anodes, 13th International Symposium on Solid Oxide Fuel Cells (SOFC-XIII), Publisher: ELECTROCHEMICAL SOC INC, Pages: 1619-1626, ISSN: 1938-5862
Duboviks V, Maher RC, Offer G, et al., 2013, In-Operando Raman Spectroscopy Study of Passivation Effects on Ni-CGO Electrodes in CO2 Electrolysis Conditions, 13th International Symposium on Solid Oxide Fuel Cells (SOFC-XIII), Publisher: ELECTROCHEMICAL SOC INC, Pages: 3111-3117, ISSN: 1938-5862
Lomberg M, Ruiz-Trejo E, Offer G, et al., 2013, Characterization of a Novel Ni-impregnated GDC Electrode for Solid Oxide Fuel Cell and Electrolysis Cell Applications, SOLID OXIDE FUEL CELLS 13 (SOFC-XIII), Vol: 57, Pages: 1349-1357, ISSN: 1938-5862
Parkes M, Refson K, d'Avezac M, et al., 2013, Determining Surface Chemistry and Vibrational Properties of SOFC Anode Materials Through ab initio Calculations, SOLID OXIDE FUEL CELLS 13 (SOFC-XIII), Vol: 57, Pages: 2419-2427, ISSN: 1938-5862
Wu B, Yufit V, Campbell J, et al., 2013, Simulated and experimental validation of a fuel cell-supercapacitor passive hybrid system for electric vehicles, IET Conference Publications, Vol: 2013
The concept of a fuel cell-supercapacitor hybrid system involves the direct coupling of the two devices to achieve the same benefits of hybridisation but without the need for costly DCDC converters. Using an experimentally validated steady state fuel cell model and a transmission line based supercapacitor model, it has been shown that the passive hybridisation allows for efficiency gains of approximately 16% compared to a pure fuel cell system. Under load, the supercapacitors meets the peak power requirement due to their lower impedance giving the FC time to ramp up. Under no load conditions, the fuel cell gradually charges the supercapacitors back to the steady state thermodynamic equilibrium potential. A fast fourier transform analysis of the respective loads under an automotive drive cycle showed that the supercapacitors act as a low pass filter, reducing the magnitude of load oscillations from the fuel cell. This therefore addresses two of the main modes of fuel cell degradation in automotive applications: rapid power cycling and no load idling.
Tariq F, Kishimoto M, Cooper SJ, et al., 2013, Advanced 3D Imaging and Analysis of SOFC Electrodes, SOLID OXIDE FUEL CELLS 13 (SOFC-XIII), Vol: 57, Pages: 2553-2562, ISSN: 1938-5862
Maskell WC, Brett DJL, Brandon NP, 2013, Improvements to Zirconia Thick-Film Oxygen Sensors, 17th Conference on Sensors and Their Applications, Publisher: IOP PUBLISHING LTD, ISSN: 1742-6588
Yufit V, Hale B, Matian M, et al., 2013, Development of a Regenerative Hydrogen-Vanadium Fuel Cell for Energy Storage Applications, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 160, Pages: A856-A861, ISSN: 0013-4651
Clague R, Marquis AJ, Brandon NP, 2013, Time independent and time dependent probability of failure of solid oxide fuel cells by stress analysis and the Weibull method, JOURNAL OF POWER SOURCES, Vol: 221, Pages: 290-299, ISSN: 0378-7753
Cooper SJ, Kishimoto M, Tariq F, et al., 2013, Microstructural Analysis of an LSCF Cathode Using In-Situ Tomography and Simulation, SOLID OXIDE FUEL CELLS 13 (SOFC-XIII), Vol: 57, Pages: 2671-2678, ISSN: 1938-5862
Mazur C, Contestabile M, Offer G, et al., 2012, Comparing electric mobility policies to transition science: Transition management already in action?, Pages: 123-128, ISSN: 2165-4387
Driven by sustainability issues as well as economic aspects, governments have been creating and applying policies and regulations with the aim of shifting national personal transport towards electric mobility. In this context, transition science offers insights into the relevant socio-technological systems and the process of transition. This paper gives an overview of transition science, and furthermore presents current policy making by the UK and German governments that aim to manage the shift to electric mobility. A comparison of the two different policies with transition science shows that there is an overlap between the applied policy making and theory, especially for the case of the UK. Although both governments do not explicitly follow transition management their actions can be explained with the help of transition science. However, it should be noted that transition science is still a young field which needs to be further developed in order to provide policy makers with tools that enable them to manage such transitions. ©2012 IEEE.
Solid oxide fuel cells (SOFCs) have many advantages when compared to other fuel cell technologies, particularly for distributed stationary applications. As a consequence they are becoming ever more economically competitive with incumbent energy solutions. However, as with all technologies, improvements in durability, efficiency and cost is required before they become feasible alternatives. Such improvements are enabled through improved understanding of the critical material interactions occurring during operation. Raman spectroscopy is a noninvasive and non-destructive optical characterization tool which is ideally suited to the study of these critical chemical processes occurring within operational SOFCs. In this paper we will discuss advantages of using Raman characterization for understanding these important chemical processes occurring within SOFCs. We will present the specific examples of the type of measurement possible and discuss the direction of future research. © 2012 Materials Research Society.
Iora P, Taher MAA, Chiesa P, et al., 2012, A one dimensional solid oxide electrolyzer-fuel cell stack model and its application to the analysis of a high efficiency system for oxygen production, CHEMICAL ENGINEERING SCIENCE, Vol: 80, Pages: 293-305, ISSN: 0009-2509
Ang SMC, Brett DJL, Staffell I, et al., 2012, Design of fuel-cell micro-cogeneration systems through modeling and optimization, WILEY INTERDISCIPLINARY REVIEWS-ENERGY AND ENVIRONMENT, Vol: 1, Pages: 181-193, ISSN: 2041-8396
Wu B, Offer GJ, Yufit V, et al., 2012, Fault analysis in battery module design for electric and hybrid vehicles
In this paper systems integration issues, such as electrical and thermal design and management of full battery packs - often containing hundreds of cells - are discussed. The design and construction of a 9 kWh battery pack for a motorsports application is used as an example. The pack contained 504 lithium cells arranged into 2 sidepods, each containing 3 modules, with each module in a 12P7S configuration. This paper focuses on describing problems related to cells being connected in parallel, known as massively parallel packs. We also demonstrate how a full vehicle test can be used to identify malfunctioning strings of cells for further investigation. It is shown that normal inter-cell contact resistances can cause currents to flow unevenly within the pack, leading to cells being unequally worked. This is supported by a Matlab/Simulink model of one battery module, including contact resistances, which was able to reproduce the results that were seen in experimental tests. Over time the unequal current flowing through cells can lead to significant differences in cells' state of charge and open circuit voltages, large currents flowing between cells even when the load is disconnected, and ultimately, some cells discharging and aging more quickly than others and jeopardising the energy storage capacity and lifetime of the entire pack.
Clague R, Marquis AJ, Brandon NP, 2012, Finite element and analytical stress analysis of a solid oxide fuel cell, JOURNAL OF POWER SOURCES, Vol: 210, Pages: 224-232, ISSN: 0378-7753
Konda NVSNM, Shah N, Brandon NP, 2012, Dutch hydrogen economy: evolution of optimal supply infrastructure and evaluation of key influencing elements, ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING, Vol: 7, Pages: 534-546, ISSN: 1932-2135
Shearing PR, Bradley RS, Gelb J, et al., 2012, Exploring microstructural changes associated with oxidation in Ni-YSZ SOFC electrodes using high resolution X-ray computed tomography, SOLID STATE IONICS, Vol: 216, Pages: 69-72, ISSN: 0167-2738
Offer GJ, Yufit V, Howey DA, et al., 2012, Module design and fault diagnosis in electric vehicle batteries, JOURNAL OF POWER SOURCES, Vol: 206, Pages: 383-392, ISSN: 0378-7753
Brightman E, Maher R, Offer GJ, et al., 2012, Designing a miniaturised heated stage for in situ optical measurements of solid oxide fuel cell electrode surfaces, and probing the oxidation of solid oxide fuel cell anodes using in situ Raman spectroscopy, REVIEW OF SCIENTIFIC INSTRUMENTS, Vol: 83, ISSN: 0034-6748
Brandon N, 2012, Can we kick our petrol pump habit?, MATERIALS TODAY, Vol: 15, Pages: 182-182, ISSN: 1369-7021
Lorente E, Millan M, Brandon NP, 2012, Use of gasification syngas in SOFC: Impact of real tar on anode materials, INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, Vol: 37, Pages: 7271-7278, ISSN: 0360-3199
Somalu MR, Brandon NP, 2012, Rheological Studies of Nickel/Scandia-Stabilized-Zirconia Screen Printing Inks for Solid Oxide Fuel Cell Anode Fabrication, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Vol: 95, Pages: 1220-1228, ISSN: 0002-7820
Brett DJL, Manage M, Agante E, et al., 2012, Fuels and fuel processing for low temperature fuel cells, Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology: Fundamentals and Performance of Low Temperature Fuel Cells, Pages: 3-26, ISBN: 9781845697730
This chapter examines the role of the fuel in the operation, performance and degradation of fuel cells. The range of fuels and impurities that are of relevance to low-temperature fuel cells are discussed and the performance from a thermodynamic perspective is analysed. As a route to hydrogen, various fuel processing options are considered along with an overview of the major storage techniques. Issues associated with alternative fuels are covered along with the deleterious properties of fuels and their impurities. © 2012 Woodhead Publishing Limited All rights reserved.
Liu YH, Brandon NP, Liu M, 2012, Electrical models of SOFC for Power Generation, Asia-Pacific Power and Energy Engineering Conference (APPEEC), Publisher: IEEE, ISSN: 2157-4839
Hawkes A, Bergman N, Jardine C, et al., 2012, A change of scale? prospects for distributed energy resources, Energy 2050: Making the Transition to a Secure Low Carbon Energy System, Pages: 219-257, ISBN: 9781849775311
Brett DJL, Agante E, Brandon NP, et al., 2012, The role of the fuel in the operation, performance and degradation of fuel cells, Functional Materials for Sustainable Energy Applications, Pages: 249-278, ISBN: 9780857090591
This chapter examines the role of the fuel in the operation, performance and degradation of fuel cells. The range of fuels that are of relevance to fuel cells are discussed and the performance from a thermodynamic perspective is analysed. As a route to hydrogen, various fuel processing options are considered along with an overview of the major storage techniques. Issues associated with alternative fuels are covered along with the deleterious properties of fuels and their impurities. © 2012 Woodhead Publishing Limited All rights reserved.
Cai Q, Haw AWV, Adjiman CS, et al., 2012, Hydrogen production through steam electrolysis: a model-based study, 22nd European Symposium on Computer Aided Process Engineering (ESCAPE), Publisher: ELSEVIER SCIENCE BV, Pages: 257-261, ISSN: 1570-7946
Shearing PR, Brandon NP, Gelb J, et al., 2012, Multi Length Scale Microstructural Investigations of a Commercially Available Li-Ion Battery Electrode, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 159, Pages: A1023-A1027, ISSN: 0013-4651
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