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Dissertations / Theses on the topic 'Fuel'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Preece, John Christopher. "Oxygenated hydrocarbon fuels for solid oxide fuel cells." Thesis, University of Birmingham, 2006. http://etheses.bham.ac.uk//id/eprint/117/.

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In order to mitigate the effects of climate change and reduce dependence on fossil fuels, carbon-neutral methods of electricity generation are required. Solid oxide fuel cells (SOFCs) have the potential to operate at high efficiencies, while liquid hydrocarbon fuels require little or no new infrastructure and can be manufactured sustainably. Using hydrocarbons in SOFCs introduces the problem of carbon deposition, which can be reduced or eliminated by judicious choice of the SOFC materials, the operating conditions or the fuel itself. The aim of this project was to investigate the relationships

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2

Hung, Tak Cheong. "Fuel reforming for fuel cell application /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?CENG%202006%20HUNG.

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3

ROMANATO, LUIZ S. "Armazenagem de combustivel nuclear queimado." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11204.

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Made available in DSpace on 2014-10-09T12:49:28Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:01:16Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares, IPEN/CNEN-SP

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4

Zhang, Mingming. "Properties of bio-oil based fuel mixtures: biochar/bio-oil slurry fuels and glycerol/bio-oil fuel blends." Thesis, Curtin University, 2015. http://hdl.handle.net/20.500.11937/1825.

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This thesis reports the properties of bio-oil-based fuel mixtures. For bioslurry fuels, the interaction between biochar and bio-oil results in changes in fuel properties and the redistribution of inorganic species. For glycerol/methanol/bio-oil (GMB) fuel blends, the solubility and fuel properties are improved upon methanol addition but other impurities in crude glycerol worsen the solubility with limited impact on properties. It is also possible to integrate the GMB blends production into the biodiesel production process.

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5

Clarke, Adrian James. "The conceptual design of novel future UAV's incorporating advanced technology research components." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/7163.

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There is at present some uncertainty as to what the roles and requirements of the next generation of UAVs might be and the configurations that might be adopted. The incorporation of technological features on these designs is also a significant driving force in their configuration, efficiency, performance abilities and operational requirements. The objective of this project is thus to provide some insight into what the next generation of technologies might be and what their impact would be on the rest of the aircraft. This work involved the conceptual designs of two new relevant full-scale UAVs

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6

Leung, Chin Pui Perry. "Exhaust gas fuel reforming to achieve fuel saving." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4330/.

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As much as 70 to 75% of the energy in the fuel used by a car is turned into waste heat, with more than a third of this released through the exhaust pipe. Catalysis offers a way of recovering exhaust heat. By adding some of the fuel to a portion of the exhaust as it passes through a catalytic reactor, it is possible to produce a gas mixture with a higher heating value than the fuel. This strategy depends, however, on the catalytic reaction consuming heat, while generating readily-combustible products that can be fed back to the engine. An investigation into catalytic exhaust gas fuel reforming

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7

DeGolyer, Jessica Suzanne. "Fuel Life-Cycle Analysis of Hydrogen vs. Conventional Transportation Fuels." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-08192008-124223/.

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Fuel life-cycle analyses were performed to compare the affects of hydrogen on annual U.S. light-duty transportation emissions in future year 2030. Five scenarios were developed assuming a significant percentage of hydrogen fuel cell vehicles to compare different feedstock fuels and technologies to produce hydrogen. The five hydrogen scenarios are: Central Natural Gas, Central Coal Gasification, Central Thermochemical Nuclear, Distributed Natural Gas, and Distributed Electrolysis. The Basecase used to compare emissions was the Annual Energy Outlook 2006 Report that estimated vehicle and electri

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8

Lee, Won Yong Ph D. Massachusetts Institute of Technology. "Mathematical modeling of solid oxide fuel cells using hydrocarbon fuels." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74906.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Solid oxide fuel cells (SOFCs) are high efficiency conversion devices that use hydrogen or light hydrocarbon (HC) fuels in stationary applications to produce quiet and clean power. While successful, HC-fueled SOFCs face several challenges, the most significant being performance degradation due to carbon deposition and the need of external reforming when using heavier HC. Modeling these devices faces these as well as o

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9

Lively, Treise. "Ethanol fuel cell electrocatalysis : novel catalyst preparation, characterization and performance towards ethanol electrooxidation." Thesis, Queen's University Belfast, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.602560.

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10

Matter, Paul H. "Electrocatalytic and fuel processing studies for portable fuel cells." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1149037376.

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11

Salih, Fawzi Mohamed. "Automotive fuel economy measures and fuel usage in Sudan." Thesis, University of Leeds, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293763.

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12

Aquien, Alexandre. "Fuel cycle options for optimized recycling of nuclear fuel." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/42340.

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Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2006.<br>Page 200 blank.<br>Includes bibliographical references (p. 170-171).<br>The accumulation of transuranic inventories in spent nuclear fuel depends on both deployment of advanced reactors that can be loaded with recycled transuranics (TRU), and on availability of the facilities that separate and reprocess spent fuel. Three recycling strategies are explored in this study: (1) Recycl

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13

Flora, Giacomo. "Fuel Structure Effects on Surrogate Alternative Jet Fuel Emission." University of Dayton / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1450286398.

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14

Sinuka, Yonwaba. "Performance testing of a diesel engine running on varying blends of jatropha oil, waste cooking oil and diesel fuel." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2436.

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Thesis (MTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2016.<br>The high cost of fossil fuels and the fact that the world has arguably reached its peak oil production, has driven the need to seek alternative fuel sources. The main objective of the current study is to determine the performance of a laboratory-mounted diesel engine when fuelled with varying laboratory prepared biofuel and biodiesel and whether the advancement of the injection timing parameters will improve the engine power output and improve the smoke effect of these different fuel blends. The labora

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15

Rohaly, Matthew Joseph. "Decomposition of Aromatic Amines in a Jet Fuel Surrogate." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1417777531.

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16

Huang, Lloyd Michael. "Analysis of multi-recycle thorium fuel cycles in comparison with once-through fuel cycles." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47662.

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The purpose of this research is to develop a methodology for a thorium fuel recycling analysis that provides results for isotopics and radio-toxicity evaluation and analysis. This research is motivated by the need to reduce the long term radiological hazard in spent nuclear fuel, which mitigates the mixing hazard (radiotoxicity and chemical toxicity) and decay heat load on the repository. The first part of the thesis presents comparison of several once-through cases with uranium and thorium fuels to show how transuranics build up as fuel is depleted. The once-through analysis is performed f

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17

Marquez, Matias G. "Silicide fuel swelling behavior and its performance in I2S-LWR." Thesis, Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53970.

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The swelling mechanisms of U3Si2 under neutron irradiation in reactor conditions are not unequivocally known. The limited experimental evidence that is available suggests that the main driver of the swelling in this material would be fission gases accumulation at crystalline grain boundaries. The steps that lead to the accumulation of fission gases at these locations are multiple and complex. However, gradually, the gaseous fission products migrate by diffusion. Upon reaching a grain boundary, which acts as a trap, the gaseous fission products start to accumulate, thus leading to formation of

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18

ROMANATO, LUIZ S. "Estudo de um casco nacional e sua instalacao para armazenagem seca de combustivel nuclear queimado gerado em reatores PWR." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9476.

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Made available in DSpace on 2014-10-09T12:27:08Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:56:18Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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19

Chandler, Sharon (Jess) Ann. "Comparison of Reprocessing Methods for Light Water Reactor Fuel." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14018.

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Currently, the United States is investigating methods to close the nuclear fuel cycle and increase the use of nuclear power for electricity and cogeneration applications. Congress has called for and held hearings in an attempt to determine an appropriate path forward for reprocessing of nuclear fuel. However, each current proposed method presents a different set of attributes with regards to: Complexity, safety, wastes, and proliferation risks. This thesis provides a decision analysis methodology for approaching the reprocessing issue. The presented methodology builds on the previous work done

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20

Sukjit, Ekarong. "Synergistic effects of alcohol-based renewable fuels : fuel properties and emissions." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4674/.

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Biodiesel is known to improve the fuel properties of alcohol-diesel blends. However biodiesel is obtained from different feedstock and consequently the composition can be different, with varying fatty acid profiles resulting in different physical and chemical properties and a different response when blended with alcohol-diesel blends. To understand the effect of molecular structure of biodiesel on fuel properties and emissions, the most representative individual fatty acid methyl esters were added to alcohol-diesel blends. The results show that 15% of all methyl esters was enough to avoid phas

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21

Mirzababaei, Jelvehnaz. "Solid Oxide Fuel Cells with Methane and Fe/Ti Oxide Fuels." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1415461807.

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22

Stutz, Michael Jun. "Hydrocarbon fuel processing of micro solid oxide fuel cell systems." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17455.

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23

Gerber, Chad A., and Jeremy A. Clark. "More fightless-fuel: reducing fuel burn through ground process improvement." Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/34667.

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Approved for public release; distribution is unlimited<br>Aligning fiscal policies with energy conservation initiatives and operational requirements is vital to achieving a positive and sustainable energy outlook for the United States Navy. The purpose of this study is to fill critical gaps in current military aviation energy conservation research. To date, such research has failed to incentivize and reward individual aviation squadrons to conserve. Commercial aviation uses collaborative decision-making (CDM) tools to minimize costs associated with aircraft delays. Embracing a lean approach to

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24

Nabity, James Allen. "Metallized fuel particle size study in a solid fuel ramjet." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/26063.

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25

Reese, Drew A. (Drew Amelia). "Dependence of transuranic content in spent fuel on fuel burnup." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/41692.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2007.<br>Includes bibliographical references (p. 33).<br>As the increasing demand for nuclear energy results in larger spent fuel volume, implementation of longer fuel cycles incorporating higher burnup are becoming common. Understanding the effect of higher burnup on the spent fuel composition and radioactive properties is essential to ensure that spent fuel receives proper cooling in storage before it is sent to a disposal site or proper treatment and reprocessing if its useful content is to be ex

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26

Zino, John Frederick. "Analysis of subcritical experiments using fresh and spent research reactor fuel assemblies." Diss., Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/17507.

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27

Chen, Guoqiang. "Fuel volatility modeling." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/12282.

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28

Gutiérrez, Daniel. "Green Fuel Simulations." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-79244.

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Many industries have entered a new global phase which takes the environment in mind. The gas turbine industry is no exception, where the utilization of green fuels is the future to spare the environment from carbon dioxide and NOx emissions. Hydrogen has been identified as a fuel which can fulfil the global requirements set by governments worldwide. Combustion instabilities are not inevitable during gas turbine operations, especially when using a highly reactive and diffusive fuel as hydrogen. These thermoacoustics instabilities can damage mechanical components and have economic consequences i

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29

Pinto, Maria Jorge Pratas de Melo. "Biodiesel fuel formulation." Doctoral thesis, Universidade de Aveiro, 2012. http://hdl.handle.net/10773/9328.

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Doutoramento em Engenharia Química<br>O consumo de energia a nível mundial aumenta a cada dia, de forma inversa aos recursos fósseis que decrescem de dia para dia. O sector dos transportes é o maior consumidor deste recurso. Face ao actual cenário urge encontrar uma solução renovável e sustentável que permita não só, diminuir a nossa dependência de combustíveis fósseis mas fundamentalmente promover a sua substituição por energias de fontes renováveis. O biodiesel apresenta-se na vanguarda das alternativas aos combustiveis derivados do petróleo, para o sector dos transportes, sendo consi

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30

Lim, Keng Guan. "Microfluidic fuel cell." View abstract/electronic edition; access limited to Brown University users, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3319104.

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31

Murray, K. D. "Biochemical fuel cells." Thesis, University of Bath, 1988. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380401.

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32

Lang, Kevin R. 1980. "Effect of fuel properties on the first cycle fuel delivery in a Port Fuel Injected Spark Ignition Engine." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/27074.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.<br>Includes bibliographical references (p. 73-74).<br>Achieving robust combustion while also yielding low hydrocarbon (HC) emissions is difficult for the first cycle of cranking during the cold start of a Port Fuel Injected (PFI) Spark Ignition (SI) engine. Cold intake port wall and valve temperatures, near-atmospheric manifold pressure, and low port air velocity combine to create an adverse environment for fuel delivery - the process of injecting and vaporizing liquid fuel to create a combustible air-

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33

Reece, Warren Daniel. "Theory of cladding breach location and size determination using delayed neutron signals /." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/13317.

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34

PESSOA, JOAO S. "Projeto piloto do etanol - PPE. Alternativa energetica para substituicao parcial ou total do oleo combustivel em plantas de geracao termoeletrica." reponame:Repositório Institucional do IPEN, 2004. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11185.

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Made available in DSpace on 2014-10-09T12:49:17Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:01:41Z (GMT). No. of bitstreams: 1 09996.pdf: 9839112 bytes, checksum: 191077eddeaa1bbd2d98314d2e7d250a (MD5)<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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35

Sommer, Christopher Michael. "Subcritical transmutation of spent nuclear fuel." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41205.

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A series of fuel cycle simulations were performed using CEA's reactor physics code ERANOS 2.0 to analyze the transmutation performance of the Subcritical Advanced Burner Reactor (SABR). SABR is a fusion-fission hybrid reactor that combines the leading sodium cooled fast reactor technology with the leading tokamak plasma technology based on ITER physics. Two general fuel cycles were considered for the SABR system. The first fuel cycle is one in which all of the transuranics from light water reactors are burned in SABR. The second fuel cycle is a minor actinide burning fuel cycle in which al

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36

Chen, Eric L. "Testing and modelling of a fuel cell and a fuel processor." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394009.

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37

Cuseo, James M. (James Michael). "Cold start fuel management of port-fuel-injected internal combustion engines." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32380.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.<br>Includes bibliographical references (p. 64).<br>The purpose of this study is to investigate how changes in fueling strategy in the second cycle of engine operation influence the delivered charge fuel mass and engine out hydrocarbon (EOHC) emissions in that and subsequent cycles. Close attention will be paid to cycle-to-cycle interaction of the fueling strategy. It is our intent to see if residual fuel from each cycle has a predicable influence on subsequent cycle's charge mass and EOHC emissions. Th

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38

Saxe, Maria. "Bringing fuel cells to reality and reality to fuel cells : A systems perspective on the use of fuel cells." Doctoral thesis, KTH, Energiprocesser, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9192.

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With growing awareness of global warming and fear of political instability caused by oil depletion, the need for a society with a sustainable energy system has been brought to the fore. A promising technology often mentioned as a key component in such a system is the fuel cell technology, i.e. the energy conversion technology in focus in this thesis. The hopes and expectations on fuel cells are high and sometimes unrealistically positive. However, as an emerging technology, much remains to be proven and the proper use of the technology in terms of suitable applications, integration with societ

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39

Vittilapuram, Subramanian Kannan. "Modelin combustion of multicomponent fuel droplets: formulation and application to transportation fuels." Texas A&M University, 2004. http://hdl.handle.net/1969.1/3320.

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The quasi-steady, spherically symmetric combustion of multicomponent isolated fuel droplets has been modeled using modified Shvab-Zeldovich variable mechanism. Newly developed modified Shvab-Zeldovich equations have been used to describe the gas phase reactions. Vapor-liquid equilibrium model has been applied to describe the phase change at the droplet surface. Constant gas phase specific heats are assumed. The liquid phase is assumed to be of uniform composition and temperature. Radiative heat transfer between the droplet and surroundings is neglected. The results of evaporation of gasoline w

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40

Farao, Javon. "Toward a full aircraft model platform for fuel slosh-structure interaction simulations." Master's thesis, University of Cape Town, 2015. http://hdl.handle.net/11427/24315.

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The purpose of this study was to initiate the development of a full aircraft model (FAM) for the purpose of non-linear loads calculation of an aircraft. The FAM is employed during the design process of an aircraft and comprises of various reduced-order models (ROMs). These are mainly structural, slosh and aerodynamic loads. This study focused on the structural and slosh aspects using Ele- mental(TM) software as the base. First, a structural ROM was developed such that it is compatible with Airbus data and processes. The developed code reads in MSC Nastran data, from which Hermitian finite elem

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41

Abdullah, Hanisom binti. "High energy density fuels derived from mallee biomass: fuel properties and implications." Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/2259.

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Mallee biomass is considered to be a second-generation renewable feedstock in Australia and will play an important role in bioenergy development in Australia. Its production is of large-scale, low cost, small carbon footprint and high energy efficiency. However, biomass as a direct fuel is widely dispersed, bulky, fibrous and of high moisture content and low energy density. High logistic cost, poor grindability and mismatch of fuel property with coal are some of the key issues that impede biomass utilisation for power generation. Therefore, innovations are in urgent need to improve biomass vol

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42

Verma, Saket. "Experimental investigation and exergy analysis of a dual fuel engine using alternative fuels." Thesis, IITD, 2019. http://eprint.iitd.ac.in:80//handle/2074/8099.

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Ion, Robert Aurelian. "Fuel depletion analyses at the Missouri University Research Reactor." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/5903.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (March 2, 2007) Vita. Includes bibliographical references.

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44

McHenry, John Carl Izaak. "The Challenges of Biofuels in Ohio: From the Perspective of Small-Scale Producers." Ohio : Ohio University, 2008. http://www.ohiolink.edu/etd/view.cgi?ohiou1197926303.

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45

Shelby, Michael H. (Michael Howard). "PLIF investigation of the fuel distribution in gasoline direct injection fuel sprays." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43930.

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46

Welling, Orian (Orian Z. ). "Thin fuel film reactor testing for characterization of diesel fuel deposit formation." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/54481.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 29-30).<br>The need for specialized diesel fuel injectors is growing with increased efficiency and emissions regulation. These specialized fuel injectors have nozzle diameters of 150-200[mu]m which are susceptible to clogging from deposit formation. This thesis studies the deposit formation mechanisms with a thin fuel film reactor, and examines the potential for use of the reactor as a detergent screening tool. Through

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47

Sheikhansari, Abdolkarim. "Evaluation of solid oxide fuel cells operating on hydrogen sulfide contaminated fuel." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/17699/.

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This research was conducted to investigate the effect of hydrogen sulfide on the performance of single solid oxide fuel cells. A test rig was designed and commissioned to test 5x5 cm2 cells (active area: 4x4 cm2). The test rig consists of a gas blender, a humidifier, a high temperature furnace, fuel and air manifolds and a control/data logging system. The characterisation techniques used in this project, include v-i measurement, EIS and SEM/EDX analysis. The first series of experiments were carried out to investigate the effect of time, hydrogen partial pressure and temperature on the performa

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48

Eriksson, John, and Mårten Wallengren. "Model Based Control Algorithm for a Bi-Fuel Engine with fuel adjustment." Thesis, KTH, Maskinkonstruktion (Inst.), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-141183.

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For lite mer an 100 ar sedan rullade den forsta serietillverkade bilen, i den helt valbara fargen svart, av monteringslinan. Sedan dess har ett febrilt utveckingsarbete gjorts for att forbattra alla delar av bilen. Forst endast i marknadsforingssyfte med storre motorer och mer komfort, men de senaste decennierna aven som svar pa utokade lagkrav runt om i varlden for att fa salja pa respektive marknader. En av de metoder som pa senare tiden har vuxit for att minska bilarnas utslapp ar att ga over ifran bensin och diesel till alternativa branslen. Da finns det bade fornyelsebara samt icke fornye

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49

Bath, Andrew. "Performance Characterization of Complex Fuel Port Geometries for Hybrid Rocket Fuel Grains." DigitalCommons@USU, 2012. https://digitalcommons.usu.edu/etd/1381.

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This research investigated the 3D printing and burning of fuel grains with complex geometry and the development of software capable of modeling and predicting the regression of a cross-section of these complex fuel grains. The software developed did predict the geometry to a fair degree of accuracy, especially when enhanced corner rounding was turned on. The model does have some drawbacks, notably being relatively slow, and does not perfectly predict the regression. If corner rounding is turned off, however, the model does become much faster; although less accurate, this method does still pred

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50

Tshizanga, Ngoya. "A study of biodiesel production from waste vegetable oil using eggshell ash as a heterogeneous catalyst." Thesis, Cape Peninsula University of Technology, 2015. http://hdl.handle.net/20.500.11838/2153.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology.<br>While biodiesel has the potential to resolve the energy crisis, its production is hampered by both feedstock and catalyst availability. The aim of this current study is to investigate the production of biodiesel from waste vegetable oil (WVO) as feedstock under heterogeneous catalysis, mediated by calcined eggshell ash. WVO, characterised by 9% free fatty acid (FFA) and 0.17wt% water content, was employed as feedstock in the biodiesel production via transesterification reaction. The composition of WVO was determ

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