The cathode is one of the most important components for development in solid oxide fuel cells sofcs. Fabrication of thin electrolytes for secondgeneration solid oxide fuel cells. Solid oxide fuel cells sofcs can be grouped into tubular and planar designs. Diagnosis methodology and technique for solid oxide fuel.
This is a major departure from the traditional fuel cell architecture where the support layer is a ceramic composite made of ysz and nio. Promotion of oxygen reduction and evolution by applying a. Bazant for his consistent trust and support during my thesis work. The anode is the part of the sofc that has main focus in this thesis. Report on the status of the solid oxide fuel cell program page 2 usable power. Solid oxide fuel cell market verified market research. Progress in material selection for solid oxide fuel cell.
Solidoxide fuel cells sofcs are the most widely used fuel cells because they exhibit flexibility, power generation efficiency, and low pollution formation. The global solid oxide fuel cell market was valued at usd 295. Lsf electrode displays excellent performance in both fuel cell and electrolysis operations, while it also offers good durability tracked over h of fuel cell operation. Single chamber solid oxide fuel cells, scsofcs, design and performance is discussed. Design and performance of a voc abatement system using a solid oxide fuel cell by dhananjai sudhakar borwankar a thesis presented to the university of waterloo. It has zero emissions, which makes it an ecofriendly technology. Integration of micro solid oxide fuel cells in power generator. Preliminary residual stress characterization of cosputtered ptysz anode and cathode materials and fuel cell trilayers of ptyszyszptysz is also presented. This site is like a library, use search box in the widget to get ebook that you want. On having consulted this thesis youre accepting the following use conditions.
School of science and engineering capstone final report. Little is known about the complex interfacial electrochemistry and, and it is also thermochemistry. Novel coal power plant designs that lower co2 emissions are imperative in the coming decades to mitigate global temperature rise. Thus, there is a strong market for successful portable fuel powered electric generators. Pdf computational modelling of ceriabased solid oxide.
Connecting the external path back to the cathode completes the circuit. Synthesis and characterisation of materials for solid. The implications of this work on the design and fabrication of structurally viable microfabricated solid oxide fuel cell. The first system consists of a solid oxide unit cell with external reformer.
An advanced fuel cell simulator a thesis submitted. The solid oxide fuel cell is made up of a solid ceramic electrolyte which separates two electrodes as shown in figure 1a. As a result these cells are not functioning as true mixed reactant solid oxide fuel cells mrsofc. Highefficiency stationary power systems that integrate coal gasification with solid oxide fuel cells sofcs have been championed by the department of energy for the past couple of decades. A finite volume sofc model for coalbased integrated.
The hybrid solid oxide fuel cell system combines the fuel cell with a microturbine to obtain up to 70% cycle efficiency, and then distributes the electrical power to the loads via a power distribution system. Solid oxide fuel cells sofc have emerged as energy conversion devices in achieving high efficiency of over 70% with regeneration. One key feature of the methodologies presented is the use of modeling tools with an ideal balance between accuracy and computational burden. Fuel cells and biogas abstract this thesis concerns biogasoperated fuel cells. The goal of this thesis is to investigate the design of one such device, a twochamber microfabricated solid oxide fuel cell sofc. An advanced fuel cell simulator a thesis by prabha ramchandra acharya submitted to the o. Anodesupported solid oxide fuel cells sofcs model based on artificial neural network ann and optimized design variables were modeled. The first commercial use of fuel cells came more than a century later in nasa space programs to generate power for satellites and space capsules.
A thin film electrode solid oxide fuel cell model topic. Fabrication of thin electrolytes for secondgeneration. Microalloying mediated segregation and interfacial oxidation of fecr alloys for solid oxide fuel cell applications thesis for the degree of doctor of science in technology to be presented with due permission for public examination and criticism in konetalo building, auditorium k1702. This work presents systematic to develop and validate the microscopic scale models of a single cell sofc supplied with humidified. A solid oxide fuel cell is a device that produces electricity directly from oxidizing hydrogen. However, there are several challenges concerning the sofc research. Ganesh 100518745311 turbomachinery introduction the first fuel cells were invented in 1838. The solid oxide fuel cell sofc is produced from oxide materials, which become active for transportation of oxide ions and electro. Following this general analysis, two simple solid oxide fuel cell systems are examined.
The design choices are based on reported thermodynamic simulation results for the entire. Solid oxide fuel cells sofc are devices that are used to efficiently convert chemical energy into electrical energy. Solid oxide fuel cell sofc is a promising alternative energy source, with its advantages of high operating efficiency, fuel flexibility, low emissions and relatively low cost. Solid oxide fuel cells sofc are environmen tally friendly energy conversion systems to. Materials and manufacturing technologies for solid oxide. Influence of stack arrangement on performance of multiple. Solid oxide fuel cell sofc integrated power plants tu delft. Images of carbon blackfree nioysz sintered at 1400 c. In this doctoral thesis, a power conversion unit for a 10 kwsolid oxide fuel cell is modeled, and a suitable control system is designed. Development of porous metalsupported solid oxide fuel cells. Verkerk and burggraaf 1 investigated the oxygen transfer on esb with.
Hightemperature solid oxide fuel cells based on yttriastabilized. Synthesis and characterisation of materials for solid oxide fuel cell cathodes article pdf available in international journal of materials and product technology 271. Both types can consist of one or several single cells per stacking unit, i. Among several types of fuel cells, the solid oxide fuel cell sofc has the highest efficiency and could utilize various fuels 1. These fuel cells provide many advantages over traditional energy conversion systems including high efficiency, reliability, modularity, fuel adaptability, and very low levels of no x and so x emissions. Microstructure, residual stress, and mechanical properties. Atomic structure observations and reaction dynamics.
Modeling of solid oxide fuel cell performance with coal. A theoretical solid oxide fuel cell model for system. Modeling and control of the power conversion unit in a solid oxide fuel cell environment. Lastly, and most importantly, i must thank my love, suzanne. Paircoil2 predicts the parallel coiled coil fold from sequence using pairwise residue probabilitis with the paircoil algorithm and an updated coiled coil database. Microalloying mediated segregation and interfacial. Unlimited viewing of the articlechapter pdf and any associated supplements and figures. Dynamic simulation of an integrated solid oxide fuel cell. Promotion of oxygen reduction and evolution by applying a nanoengineered hybrid catalyst on cobalt free electrodes for solid oxide cells. An advanced fuel cell simulator a thesis submitted to the. Fuel cell technology may contribute to more efficient energy use, reduce emissions and also perhaps revolutionize current energy systems. Solid oxide fuel cell components download ebook pdf. In this doctoral thesis, a power conversion unit for a 10 kwsolid.
An electronic version of this dissertation is available at. A twodimensional dynamic model was created for a siemens westinghouse type tubular solid oxide fuel cell sofc. This work is downloaded from delft university of technology. Solid oxide fuel cells sofc is one of the most promising fuel cell systems for generating electricity in an efficient and enviroment friendly way 1. A solid oxide fuel cell sofc is an electrochemical conversion device that produces electricity directly from oxidizing a fuel. Solid oxide fuel cell sofc is the most efficient type of the fuel cell. The reduction of oxygen at the cathode is the slow step in the cell reaction at low temperatures, meaning that improvements in cathode performance translates directly to higher cell power densities and lower costs per kilowatt. Pdf a solid oxide fuel cell sofc is a solidstate energy conversion system that converts chemical energy. Solid oxide fuel and electrolysis cells 9 christian lensera, david udomsilpa, norbert h. This device produces electric current through the electrochemical oxidation of fuel through an ionic conductor.
Theoretical and experimental study of solid oxide fuel. Other components such as interconnects and sealings are also of great importance for the operation of an sofc but are out of the scope of this thesis. Three categories of modelling based on the white, the black and the greybox approaches are introduced. Abstract solid oxide fuel cells sofcs are becoming one of the main competitors among environmental friendly energy sources due to low emission rates, high electrical generating efficiency and potential for low operating cost. Novel anode materials for solid oxide fuel cells university of. Models for solid oxide fuel cell systems exploitation of. Integrated gasification fuel cell igfc systems combining coal gasification and solid oxide fuel cells sofc are promising for highly efficient and environmentally friendly utilization of coal for power production. Polymer electrolyte fuel cell, alkaline fuel cell, alkaline fuel cell, molten carbonate fuel cell and solid oxide fuel cell. Author links open overlay panel j will a mitterdorfer c kleinlogel d perednis l.
A solid oxide fuel cell sofc is a solid state energy conversion system that converts chemical energy into electrical energy and heat at elevated temperatures. Advantages and disadvantages of solid oxide fuel cells. Quiet, vibration free operation of solid oxide fuel cells also eliminates noise usually associated with conventional power generation systems. The objective of this study was to develop a process of cofiring the ceramic layers of a solid oxide fuel cell attached to their porous metal support.
The technology is, however, still immature and has not yet been implemented as dominant in any application or niche market. Modeling and structural optimization of solid oxide fuel cells. They operate on cathodes that become selective only under short residence times. The input parameters of the anodesupported sofc model developed in this study are as follows. Most of the present fuel cell systems use hydrogen as fuel, which is the product of natural gas. Fuel cells produce negligible or undetectable amounts of nitrous oxides and should also produce less noise pollution than conventional generators 5,6. For optimum cell performance, the ysz electrolyte must be free of porosity to avoid. Users may download and print one copy of any publication from the public portal for the. Report on the status of the solid oxide fuel cell program. Characterization of the electrochemical performance of. The second law efficiency calculations for the unit cell are carried out at 1273 k and 1073 k, 1 atm and 5 atm, and by assuming different conversion ratios for methane, hydrogen, and. Solid oxide fuel cells sofcs are characterized by low pollution, and are therefore the best alternative both for distributed energy sources and large. Pdf achievements and trends of solid oxide fuel cells in clean. Users may download and print one copy of any publication from the public.
A study of anodesupported solid oxide fuel cell modeling. Pdf the main concerns in the world today, especially in the energy field. As said in the previous section high temperature solid oxide fuel cells sofcs. On the single chamber solid oxide fuel cells sciencedirect. Solid oxide fuel cells an overview sciencedirect topics. This sofc model was integrated with simulation modules for other system components e. The simulator provides an inexpensive and accurate representation of a solid oxide fuel cell under steady state and transient conditions and can replace an actual fuel cell during testing of power conditioning equipment. Influence of stack arrangement on performance of multiplestack solid oxide fuel cells with nonuniform potential operation. Advances in solid oxide fuel cell technology sciencedirect. This book presents methodologies suitable for the optimal design of control and diagnosis strategies for solid oxide fuel cell sofc systems. Diagnosis methodology and technique for solid oxide fuel cells. Depending on the application, the tubular sofcs have dimensions from needlelike shapes to lengths of about 1. Menzlera, peter holtappelsb, takaya fujisakic, leonard kwat.
1461 1220 464 537 1527 655 1508 1262 1386 230 1596 649 203 1526 614 1108 504 334 1676 248 233 1023 1311 453 916 1074 824 98 429 1604 1348 453 1406 757 1526 8 812 1448 569 460 408 862 367 1334 287 1230