The development of these vehicles is increasing, but they still. Improving and understanding direct methanol fuel cell dmfc performance by alexandre hacquard a thesis submitted to the faculty of worcester polytechnic institute in partial fulfillment of the requirement for the degree of master of science in chemical engineering may 2005 approved dr. Mtss is a web site about fuel cell scooters, in line with the masters thesis i carried out late 1999 at princeton college mechanical engineering department. Bachelor thesis hydrogen fuel cell vehicles upcommons. Solid oxide fuel cell thesis pdf for free essay writing worksheets. However, the most common fuel cell classification is by type of electrolyte. In this thesis research, a comprehensive 3d model is developed which accounts. While the microfluidic fuel cells developed here are targeted to eventual integration with biocatalysts, the contributions of this thesis have more general applicability.
Wind photovoltaicfuel cell distributed generation systems by caisheng wang a dissertation submitted in partial fulfillment. In the1960s, international fuel cells in windsor connecticut developed a fuel cell power. In a pem fuel cell, two halfcell reactions take place simultaneously, an oxidation reaction loss of electrons at the anode and a reduction reaction gain of electrons at the cathode. In this study a portable 3kw pem fuel cell system is modeled to understand the system dynamics. A porous media approach where used to reduce the number of cells and computational time. Design of a fuel cell system chalmers publication library. We also compare the cost of fuel cell storage system to 8 other storage technologies for individual applications like rapid reserve and load shifting in section seven. Advances in fuel cell vehicle design by jennifer bauman a thesis presented to the university of waterloo in fulfillment of the thesis requirement for the degree of. The results of the analysis are presented in a specification of. Fuel cell stacks are devices of tremendous complexity and the overall thermal effect of electrochemical reactions in cells is heat production.
Energyefficient wastewater treatment by microbial fuel. In this thesis, we employ phenomenological modeling and multivariable control techniques to provide fast and. Experimental studies suggest that nafion degradation is caused by generation of trace radical species such as oh, h when in the presence of h2, o2, and pt. A thesis presented to the faculty of the graduate school of the missouri university of science and technology. Hydrogen fuel cell vehicles are meant to be the alternative for all these cars on the. Design of a fuel cell system design of a specification of requirements for a fuel cell system for the electric power generation in a 77foot sailing ship master of science thesis sebastian emanuelsson jonatan persson department of energy and environment division of electric power engineering chalmers university of technology. The advantages of proton exchange membrane pem fuel cells include lower operating temperature than other fuel cells and size small enough to fit into a car. Technologies and applications the open fuel cells journal, 20, volume 6 the ove rall cell efficiency is between 37% and 42% however, if the heated watersteam generat ed by the. Pemfcs also operate at low temperature which makes them quick to start up and easy to handle. Improving and understanding direct methanol fuel cell. An open cathode con guration supplies oxygen for the chemical reaction and removes excess heat due to irreversibilities.
In this thesis, two numerical modeling methods are used to investigate the thermal conductivity of the polymer electrolyte membrane pem fuel cell gas diffusion layer gdl. The typical value of the fuel cell voltage is about 0. Masters thesis for the degree of master of science in. This work represents the mechanical and microfluidic portion of a microfluidic biofuel cell project. Modeling the effective thermal conductivity of an anisotropic. A fuel cell is a device that directly changes chemical energy derived from combining hydrogen and oxygen into electrical energy and produces heat and water as byproducts. Proton exchange membrane fuel cell modeling and simulation using ansys fluent by adam arvay a thesis presented in partial fulfillment of the requirements for the degree master of science in technology.
A schema for a typical fuel cell wherein the electrolyte is a proton exchange membrane pem and. Advances in fuel cell vehicle design university of waterloo. A durable fuel cell power system including hydrogen storage that achieves 60% energy efficiency when operating at peak power and that offers a 325 wkg power density and 220 wl operating on hydrogen. This makes pemfc an attractive option for clean power generation. Microbial fuel cell mfc research is a rapidly evolving field that lacks established terminology and methods for the analysis of system performance. A fuel cell is an energy conversion device which takes some form of fuel. Other conditions worked with include cost estimation.
Uppermost, polymer electrolyte fuel cells, molten carbonate fuel cells, and solid oxide fuel cells have been demonstrated at commercial size in power plants. Technoeconomic analysis of hydrogen fuel cell systems used as an electricity storage technology in a wind farm with large amounts of. Pem fuel cell performance eric kruszewski thesis submitted to the faculty of the virginia polytechnic institute and. Proton exchange membrane fuel cells pemfcs run on pure hydrogen and oxygen or air, producing electricity, water, and some heat. An advanced fuel cell simulator a thesis by prabha ramchandra acharya submitted to the o. The work presented in this thesis describes a procedure for utilizing computer modeling to create high quality fuel cell simulations using ansys fluent 12.
It produces electricity with fuel on the anode side and an oxidant on the cathode side, in the presence of an electrolyte. Pdf hightemperature polymer electrolyte membrane fuel cells. The fuel cell works principally the same as a battery but it is used as a source, rather than storage. Pdf this dissertation introduces the issues of durability for hightemperature polymer electrolyte membrane fuel cells htpemfcs. Flow uniformity through the pem fuel cell stack is essential for obtaining high fuel cell e ciency. Alternative sources of energy an introduction to fuel cells. Need to match the heat release rate with the steam hydrocarbon reforming rate. Technoeconomic analysis of hydrogen fuel cell systems.
Electricity production in a microbial fuel cell fed. An advanced fuel cell simulator a thesis submitted to the. The technology is, however, still immature and has not yet been implemented as dominant in any application or niche market. Unlike 50 kw automobilesized fuel cell stacks, the vehicular 5 kw fuel cell needed here has not received much attention. Dynamic modeling control fuel cell thesis srinivasan the gradual development of an organic self with the commonly fuel modeling dynamic control cell thesis srinivasan held beliefs about the organization and often make it difficult to deny their role is to open up. A fuel cell power plant being supplied by plug power will help to test, and demonstrate the technical and economic viability of integrating baseload fuel cell power generation with onsite hydrogen production for vehicle refueling. Numerical investigation of manifold flow distribution for a.
For singlechamber tubular mfcs, anode effluent is used as catholyte instead of tap water or buffer solutions. Little is known about the complex interfacial electrochemistry and, and it is also thermochemistry. Investigation of graphite bipolar plates for pem fuel cell performance eric kruszewski thesis submitted to the faculty of the virginia polytechnic institute and. I furthermore declare that take oath that i have done my bachelor thesis in. Masters thesis for the degree of master of science in technology. Technoeconomic analysis of hydrogen fuel cell systems used. With the basic understanding of mechanisms, experimentalists can make educated predictions of ways to improve fuel cell materials. Numerical investigation of manifold flow distribution for. A threedimensional computational model of pem fuel cell. Gtsolid oxide fuel cell sofc systems for combined propulsion and power on aircraft offer a promising method for more efficient. However, utc fuel cells has developed a 250 kw bus known as thunderpower and in 2005 published the system diagram in.
The goal of this paper is to algorithmically synthesize a provablycorrect. This dissertation has been read by each member of the thesis committee and has been found to be satisfactory regarding content, english usage, format, citations, bibliographic. Energyefficient wastewater treatment by microbial fuel cells. However, fuel cells would also produce minimal emissions in the tail pipe, and furthermore might have the advantage of faster refueling. The most common type, the hydrogen fuel cell, is based on the electrochemical reaction of hydrogen and oxygen. Seventh edition fuel cell handbook technical report. The placement of the entire fuel cell system is intended to be above deck to minimize the risk of accidents. Fuel cell operation with a deadended systems anode reduces fuel cell system cost, weight, and volume because the anode external humidi. A parallelism can be seen between the research in the literature. The construction and analysis of mfcs requires knowledge of different scientific and engineering fields, ranging. Fuel cell based power generation has been proposed to be applied in transport and distributed energy supply.
Modeling and analysis for control of reactant and water. A fuel cell is similar to a battery as it operates on the electrochemical energy conversion principle but there is an important di. Pem fuel cell is used for powering a hydrogenpowered car constructed by eamt aalborg energy. Energy recovery from waste streams with microbial fuel cell mfcbased technologies phd thesis, the thesis will be available as a pdf file for downloading from the homepage of the department. Investigation of graphite bipolar plates for pem fuel cell. This thesis investigated the current manifold design, with the help of computational uid dynamics cfd. This thesis proposes a lowcost and an easytouse fuel cell simulator using a pro. First, an analytical model is used to study the throughplane thermal conductivity from representative. Thermal modeling and analysis of polymer electrolyte. Modeling and control of fuel cell systems and fuel processors by jay tawee pukrushpan cochairs.
Model development is carried out by the mass and energy balances, thermodynamics and kinetics. Hydrogen fuelcell vehicles have evolved a lot, nowadays they can drive around 500 to 800 km on a full tank. Thesis lund university publications lunds universitet. Fuel cell technology may contribute to more efficient energy use, reduce emissions and also perhaps revolutionize current energy systems. Fuel cell energy thesis the bility to but are regarded as a category for overall quality, thus ensuring that the early childhood education ece, it is guided by theoretical sampling thesis fuel cell energy. Theoretical and experimental study of solid oxide fuel. This thesis develops models for the design and control of deadended anode dea fuel cell systems. Improving and understanding direct methanol fuel cell dmfc. Thermal modeling and analysis of polymer electrolyte membrane. An introduction to fuel cells and hydrogen technology by brian cook, heliocentris vancouver, canada whereas the 19th century was the century of the steam engine and the 20th century was the century of the internal combustion engine, it is likely that the 21st century will be the century of the fuel cell. Experiments and modeling of pem fuel cells for deadended. Degradations and improvements in pem fuel cell materials. I hereby declare that this thesis is entirely the result of my own work except. Anna stefanopoulou and huei peng fuel cell systems o.
The operating temperatures of these different types of fuel cells. Proton exchange membrane fuel cell modeling and simulation. However, dea operation presents several challenges for. The role of hydrogen and fuel cell for ultra low carbon vehicles ii acknowledgments this thesis is by far the most significant academic and personal accomplishment in my life. A thesis in electrical engineering submitted to the graduate faculty of texas tech university in partial fulfillment of the requirements for the degree of master of science in electrical engineering approved august, 2002. The system model includes the fuel cell stack, humidifier, compressor, inlet and outlet manifolds, and cooling system. Seow 1998, however, considers process writing is there a relationship between enrollment in online elective courses and in departmental affairs, for the secondary solid oxide fuel cell thesis pdf school. Energy recovery from waste streams with microbial fuel.
The fuel cell power plant will be connected to the fuel station, and to the local power grid. To get higher voltage, multiple cells are stacked in series. Fuel cells and biogas abstract this thesis concerns biogasoperated fuel cells. The nafion membrane and cathode catalysts are two areas where pem fuel cells have issues of cost, durability, and efficiency. A fuel cell is an electrochemical device which converts chemical energy from a variety of fuels into electrical energy.
The total stack voltage is the number of cells multiplied by the average cell voltage. Hydrogen fuel cell vehicles i acknowledgements above all, my thanks to univ. Ultracapacitor boosted fuel cell hybrid vehicle a thesis bo. A threedimensional computational model of pem fuel cell with. This thesis presents numerical simulations of reacting transport phenomena in poly mer electrolyte membrane pem fuel cells. Energy recovery from waste streams with microbial fuel cell. Modeling and analysis for control of reactant and water distributions in fuel cells by buz a. Design and development of manufacturing methods for manufacturing of pem fuel cell meas by nikhil pramod kulkarni a thesis presented to the faculty of the graduate school of the missouri university of science and technology in partial fulfillment of the requirements for the degree master of science in mechanical engineering 2011 approved by. Production of hydrogen platefin reformer catalyst can be a surface coating or a porous insert. This makes it difficult for researchers to compare devices on an equivalent basis.
Mathematical modeling of transient transport phenomena in pem fuel cells by hao wu. 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. Microfluidic fuel cell architectures are presented in this thesis. However, the development of fuel cell is still in its early stages, which must overcome. Within the thesis, i explored the potential of replacing the 2stroke engines broadly utilized in asian scooters with hydrogen fuel cell engines. Computer modeling can also help improve fundamental understanding of the mechanisms and reactions that take place within the fuel cell. This study analyzes the contribution of all the heat sources traditionally involved in the thermal study of fuel cells, and determines simplifications. Pdf coupling of hydrogen production from the anaerobic fermentation of organic solid wastes with posttreatment of its spent extracts in. Like other electrical devices, there are electrical resistances in the fuel cell. Fuel cell is an electrochemical device that continuously converts the chemical energy of a fuel and oxidant into electrical energy and heat as long as the fuel and oxidant are supplied to the electrodes. The idea for this thesis was to design a specification of requirements for a fuel cell system for the electric power production in a 77foot sailing ship named ts.
However, there are several challenges concerning the sofc research. The role of hydrogen and fuel cells for ultra low carbon vehicles. Fuel cell technology has been on the horizon since its successful implementation in the space programs of the 1950s, with business and technology pundits as far. Scaling up and optimization zheng ge abstract microbial fuel cells mfcs are potentially advantageous as an energyefficient approach to wastewater treatment. A threedimensional computational model of pem fuel cell with serpentine gas channels by phong thanh nguyen b. Progress continues in fuel cell technology since the previous edition of the fuel cell handbook was published in november 1998. Advances in fuel cell vehicle design by jennifer bauman a thesis presented to the university of waterloo in fulfillment of the. It has been accepted for inclusion in masters theses 1911 february 2014 by an.
An advanced fuel cell simulator a thesis submitted. This thesis will focus on a particular type of fuel cell, a variation of proton. A computational study thesis by ted yu in partial fulfillment of the requirements for the degree of doctor of philosophy california institute of technology pasadena, california 2012 defended march 6, 2012. This thesis is intended to be a foundation for the design and installation of a fuel cell system in ts prolific. The functioning of an individual fuel cell requires a continuous supply of feed gases or liquids and the removal of excess water and heat. Mathematical modeling of transient transport phenomena in. The software written for this thesis is attached to the pdf version of this the. Effects of temperature and solvent activity on the. A fuel cell system consists of, in addition to fuel cells, auxiliary components and a. The topdrive project is a followup to the working project. Design and development of manufacturing methods for.