Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Fuel Flexibility"”.
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Gas phase hydrodynamics inside a circulating fluidized bed
… have better environmental emissions and better fuel flexibility. The motion of solids inside a CFB has been studied extensively over the previous twenty years. However the motion of gas is less well understood. There has previously only been indirect measurements of gas velocities and …
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Distribution of bed material in a Horizontal Circulating Fluidised Bed boiler
… the benefits, such as high efficiency and fuel flexibility, of the CFB technology for the use in smaller industrial facilities decreases the carbon dioxide emissions tremendously,especially in a country like China. The purpose of this work is to investigate how a HCFB boiler responds to …
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Investigation of atomization mechanisms and flame structure of a twin-fluid injector for different liquid fuels
Diminishing fossil fuel resources, ever-increasing energy cost, and the mounting concerns for environmental emissions have precipitated worldwide research on alternative fuels. Biodiesel, a popular renewable energy source, is produced from the transesterification process of source oils such as …
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Oxidation driven degradation of silicon nitride based hot surface ignition assistant devices
… assistant devices show great promise in enabling fuel flexibility in CI engines that otherwise require certain levels of reactivity in their fuels for safe and efficient operation. Previous research has shown that commercially available silicon nitride-based glow plugs can serve as effective …
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Investigating the strategic impacts of natural gas on transportation fuel diversity and vehicle flexibility
… to mitigate these issues, the U.S. has promoted fuel diversification and vehicle fuel flexibility in the transportation sector as complementary strategies. However, the search for a fuel that replicates the features of oil has proven elusive to policy makers. With the technological innovation of …
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Particle Size, Gas Temperature, and Impingement Cooling Effects on High Pressure Turbine Deposition in Land Based Gas Turbines from Various Synfuels
… ash deposits from two candidate power turbine synfuels. The facility matches the gas temperature and velocity of modern first stage high pressure turbine vanes while accelerating the deposition process. This is done by matching the net throughput of particulate out of the combustor with that …
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Surface phase emergence and evolution of solid oxide fuel cell cathode materials
Solid Oxide Fuel Cell (SOFC) technology is an effective method of energy conversion due to its high efficiency and fuel flexibility. A limiting factor for SOFC performance is the oxygen reduction reaction (ORR) that occurs at cathode surface. This research involves the study of changes in the …
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Study of Perovskite Structure Cathode Materials and Protective Coatings on Interconnect for Solid Oxide Fuel Cells
Solid oxide fuel cells (SOFCs) are promising devices to convert chemical energy to electrical energy due to their high efficiency, fuel flexibility, and low emissions. However, there are still some drawbacks hindering its wide application, such as high operative temperature, electrode degradation, …
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Electro-chemo-mechanical Studies of Perovskite-Structured Mixed Ionic-Electronic Conducting SrSni-₁₋xFexO₃₋x/₂₊[epsilon]
High efficiency and fuel flexibility make solid oxide fuel cells (SOFCs) attractive. However, when operating at reduced temperatures, there is significant loss in efficiency, of which slow surface reaction kinetics at the cathode are most responsible. Previously, the mixed ionic and electronic …
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Model electrode structures for studies of electrocatalyst degradation
Proton exchange membrane fuel cells (PEMFCs) are being extensively studied as power sources because of their technological advantages such as high energy efficiency, high energy and power densities, environmental friendliness, low noise, rapid refueling, and fuel flexibility. The most effective …
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Suppression of thermoacoustic instabilities in a swirl combustor through microjet air injection
… trends toward lower emissions and greater fuel flexibility have placed more emphasis on developing lean-premixed combustors that are stable over a range of operating conditions. This thesis explores two aspects of combustion instability in the context of a swirl-stabilized, lean-premixed …
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Printable zirconia membranes for high power density micro solid oxide fuel cells
Fuel cells are an emerging technology because of their ability to achieve high energy efficiency and low emissions. Among the various types of fuel cells, solid oxide fuel cells (SOFCs) have emerged as one of the most promising types, because of their fuel flexibility and there efficiency. The …
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Aging Effects of the Cathode and Determination of Single Electrode Performance in a Solid Oxide Fuel Cell
Solid oxide fuel cells (SOFCs) are promising electrochemical energy conversion devices due to their advantages of high theoretical efficiency, fuel flexibility (including hydrogen and carbon monoxide), scalability, and low emission. An important problem for commercially using the SOFCs is to …
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Fuel-flexible Gas Turbine Combustors for Decarbonization
L'abstract è presente nell'allegato / the abstract is in the attachment
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Theoretical and experimental study of solid oxide fuel cell (SOFC) using impedance spectra
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. However, there are several challenges concerning the SOFC research. Little is known about the complex interfacial …
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Lean Premixed Prevaporised Combustion for Microturbines
… microturbines will need to operate on liquid fuels with highly preheated air while maintaining low pollutant emissions. A promising strategy to meet these requirements is the lean premixed prevaporised (LPP) concept. Thus, this thesis explores the fuel flexibility, flame stability, structures, …
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Spray ignition enhancement for multifuel propulsion
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms