Дисертації з теми "Alternative combustion"
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Chong, Cheng Tung. "Combustion characteristics of alternative liquid fuels." Thesis, University of Cambridge, 2011. https://www.repository.cam.ac.uk/handle/1810/244379.
Повний текст джерелаGiles, Anthony Peter. "Alternative fuels and technology for internal combustion engines." Thesis, Cardiff University, 2006. http://orca.cf.ac.uk/56090/.
Повний текст джерелаIEMMOLO, DANIELE. "Alternative fuels and combustion modes to lower pollutant emissions from conventional internal combustion engines." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2724575.
Повний текст джерелаAltaher, Mohamed Alalim. "Combustion and emissions of alternative fuels in gas turbines." Thesis, University of Leeds, 2013. http://etheses.whiterose.ac.uk/4954/.
Повний текст джерелаTongroon, Manida. "Combustion characteristics and in-cylinder process of CAI combustion with alcohol fuels." Thesis, Brunel University, 2010. http://bura.brunel.ac.uk/handle/2438/4501.
Повний текст джерелаLittle, A. Tyler. "Analysis of alternative fuel combustion in a perfectly stirred reactor." Connect to resource, 2007. http://hdl.handle.net/1811/24514.
Повний текст джерелаTitle from first page of PDF file. Document formatted into pages: contains xii, 63 p.; also includes graphics. Includes bibliographical references (p. 62-63). Available online via Ohio State University's Knowledge Bank.
Bagdanavicius, Audrius. "Premixed combustion of alternative fuels under varying conditions of temperature and pressure." Thesis, Cardiff University, 2010. http://orca.cf.ac.uk/54231/.
Повний текст джерелаPark, Sammy Ace. "Combustion instability and active control| Alternative fuels, augmentors, and modeling heat release." Thesis, University of Maryland, College Park, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10129882.
Повний текст джерелаExperimental and analytical studies were conducted to explore thermo-acoustic coupling during the onset of combustion instability in various air-breathing combustor configurations. These include a laboratory-scale 200-kW dump combustor and a 100-kW augmentor featuring a v-gutter flame holder. They were used to simulate main combustion chambers and afterburners in aero engines, respectively. The three primary themes of this work includes: 1) modeling heat release fluctuations for stability analysis, 2) conducting active combustion control with alternative fuels, and 3) demonstrating practical active control for augmentor instability suppression.
The phenomenon of combustion instabilities remains an unsolved problem in propulsion engines, mainly because of the difficulty in predicting the fluctuating component of heat release without extensive testing. A hybrid model was developed to describe both the temporal and spatial variations in dynamic heat release, using a separation of variables approach that requires only a limited amount of experimental data. The use of sinusoidal basis functions further reduced the amount of data required. When the mean heat release behavior is known, the only experimental data needed for detailed stability analysis is one instantaneous picture of heat release at the peak pressure phase. This model was successfully tested in the dump combustor experiments, reproducing the correct sign of the overall Rayleigh index as well as the remarkably accurate spatial distribution pattern of fluctuating heat release.
Active combustion control was explored for fuel-flexible combustor operation using twelve different jet fuels including bio-synthetic and Fischer-Tropsch types. Analysis done using an actuated spray combustion model revealed that the combustion response times of these fuels were similar. Combined with experimental spray characterizations, this suggested that controller performance should remain effective with various alternative fuels. Active control experiments validated this analysis while demonstrating 50-70\% reduction in the peak spectral amplitude. A new model augmentor was built and tested for combustion dynamics using schlieren and chemiluminescence techniques. Novel active control techniques including pulsed air injection were implemented and the results were compared with the pulsed fuel injection approach. The pulsed injection of secondary air worked just as effectively for suppressing the augmentor instability, setting up the possibility of more efficient actuation strategy.
Zuks, Lincoln. "An evaluation of an alternative glycerol gasification, combustion and power generation system." Thesis, Zuks, Lincoln (2014) An evaluation of an alternative glycerol gasification, combustion and power generation system. Other thesis, Murdoch University, 2014. https://researchrepository.murdoch.edu.au/id/eprint/23529/.
Повний текст джерелаKashif, Muhammad. "Measurement of sooting tendencies of alternative fuels : application to primary reference fuels." Paris 6, 2013. http://www.theses.fr/2013PA066258.
Повний текст джерелаAn optical diagnostics layout is designed and validated to measure soot volume fraction in methane/air diffusion flames doped with vapors of liquid hydrocarbons. Soot volume fraction is inferred from the inversion of integrated light extinction data using an Onion-peeling algorithm stabilized by a Tikhonov regularization method. This measurement is then converted into apparatus-independent Yield Sooting Index (YSI). The method has been applied to compare the sooting tendencies of PRFs in doped axisymmetric diffusion flames when keeping the concentration or energy of injected vapors constant. A second-order correlation modeling the variation of YSI with the mole fraction of iso-octane in PRF mixture and the proportion of carbon dioxide in the co-flowing oxidizer has been established using least-squares non-linear data-fitting to experimental data. These studies performed on laboratory flames and the results obtained are of practical importance and can be used to predict the sooting behavior of fuels under practical combustion environment
Depman, Albert J. III. "Stoker boiler CFD modeling improvements through alternative heat exchanger modeling." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/4609.
Повний текст джерелаFilho, Fernando Luiz Sacomano. "Simulações de chamas turbulentas de etanol com modelo de turbulência k-E." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3150/tde-04112011-145536/.
Повний текст джерелаSeveral industrial equipments use combustion processes with sprays. The main advantages of this process are related to the increase in the flame control and in the safety of liquid fuel logistics. Currently, the interest on the utilization of biofuels as an alternative to the reduction of carbon dioxide emissions is increasing. Among the types of biofuels the ethanol stands out by being used blended with gasoline in the transport sector of several countries. From this overview, this work presents the modeling and simulation of an ethanol turbulent spray flame. The results of the simulations were compared with experimental data from the literature. The resulting model was based on the finite volume method for low Mach number and steady state flows. The spray was calculated using the Separated Flow method (SF) with an Euler-Lagrange model, where the gaseous phase was described by an Eulerian model and the liquid phase by a Lagrangian particle method. Both phases were fully coupled in order to account for shared effects. The turbulence model k- Standard was used to determine the dispersant phase. Evaporation of droplets was calculated with the assumption of the infinite-liquid-conductivity model, where the droplet inner temperature is uniform, but varies with the mass and heat transfer within the dispersant phase. To reproduce the effects of the evaporative cooling the combustion was modeled with a modified flamesheet model which regarded a jointed mixture fraction-enthalpy -PDF. Radiactive heat transfer was not accounted for in this work. Reasonable agreement between measured and computed mean profiles of temperature of the gas phase and droplet size distributions was achieved. Some deviations were observed in the mean velocity profiles comparisons between experimental data and simulations, which were assigned to the over predicted diffusion of the mean quantities transported by the gas phase.
Imran, Shahid. "Experimental and numerical investigation of performance and emissions in compression ignition engines with alternative fuels." Thesis, Queen Mary, University of London, 2013. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8505.
Повний текст джерелаMosckem, Sergio Luis [UNESP]. "Análise do emprego de materiais alternativos no alto forno da Arcelormital Tubarão." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/99326.
Повний текст джерелаCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O trabalho de análise do uso de materiais alternativos no Alto Forno 1 da ArcelorMittal Tubarão estabelece uma taxa de substituição de cada material alternativo, plástico e pneu, em relação ao uso exclusivo do carvão mineral injetado no Alto Forno através das ventaneiras. A taxa de utilização de plástico e pneu é avaliada considerando o aporte de energia e dos agentes necessários para a reação química de redução do minério de ferro em ferro metálico. No presente trabalho são elaborados os balanços de massa e de energia de acordo com a configuração operacional vigente no segundo semestre de 2009 para o Alto Forno 1 e com os dados de produção do mês de julho de 2009. O resultado mostra a viabilidade técnica do uso de plástico ou pneu e estabelece as condições de uso de cada um em relação à quantidade, tipo e granulometria. A substituição energética decorrente do uso de plástico e pneu estabelece uma forma de aplicação segura e controlada deste resíduo, além de agregar valor a estes materiais normalmente descartados pela sociedade. Contribui também para amenizar os impactos ambientais decorrentes da falta de uma destinação regulamentada e eficaz para plásticos descartados e pneus inservíveis
The study of alternative fuel materials in the Blast Furnace 1 of ArcelorMittal Tubarão, establishes a rate of each material analyzed, waste plastics packaging and waste tires, in order to replace part of the pulverized coal that is usually injected in to the Blast Furnace through the tuyeres. The injection rate of waste plastic packaging and waste tires is analyzed considering the energy input and the necessary elements for the iron ore reduction chemical reaction. The mass and energy balance is done according to the operational configuration of the Blast Furnace 1 in the second semester of 2009 and operation data from July of 2009. The result of the study shows technical viability to use waste plastics packaging and waste tires and establish requirements for the injection, such as flow rate and particles size. The alternative energy provided from these waste materials builds a safety and controlled way to reach the best utilization for each one. Moreover, the environmental impact can be reduced due to its disposal is normally done in outdoor areas
Stauber, Alfredsson Malin. "Effects of Different Fuels on Combustion Boiler Processes : The analysis of alternative fuel mixtures." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231565.
Повний текст джерелаSyftet med studien var att undersoka branslets paverkan pa tva uidbaddpannor, IKV och IGV P3, hos energiforetaget Soderenergi. Idag ar det huvudsakliga branslet i dessa pannor returtra (RT). Med en standigtrorlig branslemarknad kravs kunskap av alternativa branslen. Baserat pa tidigare bransleanvandning,har paverkan fran potentiella bransleblandningar pa pannan undersokts. Utover returtra ar stamveds is,span, papper-plast-tra (SRF) och gummi med i de analyserade blandningarna.Med elementaranalyser pa branslen och etablerade nyckeltal utvarderades de tidigare anvanda branslena.Indikationen fran nyckeltalen ar jamford med upplevda problem och risknivaerna for nyckeltalen arandrade till passande nivaer. De framtida bransleblandningarna analyserades med hjalp av nyckeltalenoch de uppdaterade risknivaerna. Utover nyckeltalen analyserades tungmetallhalten, varmevardet, fukthaltenoch askhalten i bransleblandningarna. De pannskador orsakade av bransleblandningarna somundersokts ar korrosion, sintring och paslag.Det nuvarande branslet till IKV och IGV P3 ger en relativt lag skadeniva. Resultaten fran de analyseradebransleblandningarna visar att skaderisken i pannorna kommer att oka och forandringar av pannan kankomma att kravas. Generellt kommer korrosionsrisken och tungmetallinnehallet att oka i jamforelse meddagens bransle. Okat paslag och slaggning ar ocksa forvantat. Vidare visar resultatet att askproduktionenkommer att oka, vilket gor att IKVs kylsystem for bottenaskan kommer behovas byggas ut. LHV for deanalyserade bransleblandningarna for IGV P3 okar, vilket innebar att kapaciteten for returgas aktarnatroligen maste okas.I jamforelsen av de olika bransleblandningarna visas att korrosionsrisken, forutspadd av nyckeltalen,minskar med en hogre andel gummi. Daremot okar tungmetallinnehallet, vilket leder till en okad riskfor bildning av eutektiska salter, vilka ocksa ar korrosiva. Bransleblandningarna med en indikerad hogrisk av nyckeltalen, har tvartemot den lagsta koncentrationen av tungmetaller. Eftersom resultatenar motsagande, kravs en avvagning mellan riskerna indikerade av nyckeltalen och tungmetallshalten.De bransleblandningar som ar ansedda att vara minst skadliga for IKV ar en blandning av 42% RT,48% tradbransle och 15% SRF, och en blandning av 70% tradbransle, 20% SRF och 10% gummi. Debransleblandning som ar ansedda att vara minst skadliga for IGV P3 ar en blandning av 85% RT och15% gummi, och en blandning av 70% RT och 30% SRF.
Carra, Filippo <1990>. "Analysis, modeling and control of standard and alternative combustion strategies in a diesel engine." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amsdottorato.unibo.it/8938/1/Filippo_Carra_PhD_Thesis.pdf.
Повний текст джерелаFlora, Giacomo. "Fuel Structure Effects on Surrogate Alternative Jet Fuel Emission." University of Dayton / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1450286398.
Повний текст джерелаTira, Hendry Sakke. "Impact of alternative fuels and hydrogen-enriched gaseous fuel on combustion and emissions in diesel engines." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4376/.
Повний текст джерелаStratton, Russell William. "Life cycle assessment of greenhouse gas emissions and non-CO₂ combustion effects from alternative jet fuels." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59694.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 135-144).
The long-term viability and success of a transportation fuel depends on both economic and environmental sustainability. This thesis focuses specifically on assessing the life cycle greenhouse gas (GHG) emissions and non-CO 2 combustion effects from conventional jet fuel and synthetic paraffinic kerosene (SPK). The research expands upon the work of Wong (2008) by examining Fischer-Tropsch jet fuel from coal and biomass, and hydroprocessed renewable jet (HRJ) fuel from rapeseed, jatropha, algae and salicornia. Each fuel option is a "drop-in" alternative in that they are compatible with existing aviation infrastructure. Using a modified version of the APMT climate impacts module, the additional climate forcing from non-CO 2 combustion effects is combined with the fuel life cycle GHG inventories. Life cycle GHG emissions are only one of many aspects that must be considered when evaluating the feasibility and sustainability of an alternative fuel option. While cost and fresh water availability are important constraints, fuel yield and land requirements for select biomass-based fuel pathways are quantified. This is most important for feedstocks requiring cropland for cultivation. For example, current global production of soy, palm and rapeseed oil translate to only 34%, 43% and 18% of US jet fuel demand, respectively; hence, even small fractions of the petroleum industry translate to massive production scales in absolute terms. By comparison, HRJ from algal oil can yield more than an order of magnitude higher fuel production per hectare of land. Few biofuels were identified with zero life cycle GHG emissions. This contradicts previous studies and likely results from avoiding the displacement method to allocate emissions. Considerable inter and intra fuel option variability was found in life cycle GHG emissions; land use change contributed much to the variability of many pathways. The range in life cycle GHG emissions of all fuel options examined ranged from 0 to 9.1 times those of conventional jet fuel. The uncertainty in treating non-CO 2 combustion effects was found to have a larger influence on the life cycle emissions of each fuel option than the variability of the life cycle GHG inventories; however, including non-CO 2 combustion effects reduced the overall range in emissions of all fuel options considered to only 0 to 4.7 times those of conventional jet fuel. Hence, the inclusion of non-CO 2 effects in the fuel life cycle increases the absolute uncertainty of each fuel option but reduces the overall variability in the life cycle emissions of alternative fuels relative to conventional jet fuel.
by Russell William Stratton.
S.M.
Omidvarborna, Hamid. "Combustion Chemistry of Biodiesel for the Use in Urban Transport Buses: Experiment and Modeling." University of Toledo / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1464863574.
Повний текст джерелаHui, Xin. "Flame Studies on Conventional, Alternative, and Surrogate Jet Fuels, and Their Reference Hydrocarbons." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1354909906.
Повний текст джерелаMosckem, Sergio Luis. "Análise do emprego de materiais alternativos no alto forno da Arcelormital Tubarão /." Guaratinguetá : [s.n.], 2010. http://hdl.handle.net/11449/99326.
Повний текст джерелаAbstract: The study of alternative fuel materials in the Blast Furnace 1 of ArcelorMittal Tubarão, establishes a rate of each material analyzed, waste plastics packaging and waste tires, in order to replace part of the pulverized coal that is usually injected in to the Blast Furnace through the tuyeres. The injection rate of waste plastic packaging and waste tires is analyzed considering the energy input and the necessary elements for the iron ore reduction chemical reaction. The mass and energy balance is done according to the operational configuration of the Blast Furnace 1 in the second semester of 2009 and operation data from July of 2009. The result of the study shows technical viability to use waste plastics packaging and waste tires and establish requirements for the injection, such as flow rate and particles size. The alternative energy provided from these waste materials builds a safety and controlled way to reach the best utilization for each one. Moreover, the environmental impact can be reduced due to its disposal is normally done in outdoor areas
Orientador: José Antonio Perrella Balestieri
Coorientador: João Andrade de Carvalho Junior
Banca: Luiz Roberto Carrocci
Banca: Ricardo Dias Martins de Carvalho
Mestre
Mathews, Lopez Francisco. "A Multi-Criteria Decision-Making Model for Evaluation of Waste-to-Energy Technologies from Municipal Solid Waste| Combustion or Gasification for Puerto Rico?" Thesis, The George Washington University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10845962.
Повний текст джерелаThe island of Puerto Rico, a commonwealth of the United States of America, has a population of 3,725,789 according to the 2010 census, and generates 11,100 tons daily of waste. In the Island, landfilling is the dominant form of waste disposal. Most municipal solid waste landfills (MSWLF) in Puerto Rico are a principal source of land, water, and air pollution. In addition, the scarcity of appropriate land to open new landfill facilities make this type of waste disposal an unsustainable form of waste management for the Island.
This study evaluated the current situation of the MSWLFs in Puerto Rico and the geographic limitations of continuing with this type of waste disposal on the Island. As alternatives to this problem, the principal waste-to-energy (WTE) technologies, combustion and gasification, are evaluated as environmentally responsible forms for disposal of non-recycled waste.
The evaluation methodology used is based on a multi-criteria decision-making model that uses a subjective rank-order weighting method. Evaluation of WTE technologies is performed by comparing dissimilar indicators in five interest areas: technical, economic, environmental, socio-political, and risk. The methodology is composed of two-components: an expert survey and data analysis.
An evaluation of the environmental interest area was performed to assess which of the WTE technologies studied herein, combustion or gasification, is more environmentally responsible. In addition, using the relevant scores in different interest areas, they were evaluated to determine the economic benefits of these WTE technologies as viable waste management alternatives for Puerto Rico.
Nerva, Jean-Guillaume. "An Assessment of fuel physical and chemical properties in the combustion of a Diesel spray." Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/29767.
Повний текст джерелаNerva, J. (2013). An Assessment of fuel physical and chemical properties in the combustion of a Diesel spray [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/29767
Palancia
Agbro, Edirin Bruno. "Experimental and chemical kinetic modelling study on the combustion of alternative fuels in fundamental systems and practical engines." Thesis, University of Leeds, 2017. http://etheses.whiterose.ac.uk/17980/.
Повний текст джерелаBernardes, Pedrozo Vinícius. "An experimental study of ethanol-diesel dual-fuel combustion for high efficiency and clean heavy-duty engines." Thesis, Brunel University, 2017. http://bura.brunel.ac.uk/handle/2438/15850.
Повний текст джерелаVittori, Ruggero Maria. "Experimental study on the effect of stoichiometric air/fuel ratio of three binary oxygenated fuel blends on combustion and emissions of a heavy duty Diesel engine." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18203/.
Повний текст джерелаJain, Deeksha. "Development of Alternative Materials to Replace Precious Metals in Sustainable Catalytic Technologies." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1566176607919202.
Повний текст джерелаChien, Jui-Yu. "The future and outlook of alternative fuel bus industry and its marketing strategy." CSUSB ScholarWorks, 2002. https://scholarworks.lib.csusb.edu/etd-project/2332.
Повний текст джерелаSurawski, Nicholas C. "An investigation of gaseous and particulate emissions from compression ignition engines operated with alternative fuels, injection technologies, and combustion strategies." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/54194/1/Surawski_Thesis_2011.pdf.
Повний текст джерелаMANELLI, ANDREA. "Engine Technologies for Reduction of Fuel Consumption and Pollutant Emissions in Light-Duty Diesel Engines." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2971996.
Повний текст джерелаKapadia, Zarashpe Zarir. "Quantifying the climate and air quality impacts of non-CO2 species from the combustion of standard and alternative fuels in aviation." Thesis, University of Leeds, 2015. http://etheses.whiterose.ac.uk/12978/.
Повний текст джерелаEverett, Ryan Vincent. "An Improved Model-Based Methodology for Calibration of an Alternative Fueled Engine." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1321285633.
Повний текст джерелаJansa, Oldřich. "Porovnání vlastností alternativních pelet." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229503.
Повний текст джерелаLezzar, Balahouane. "Contribution à l'étude de la combustion et des limites de fonctionnement dans un monocylindre à taux de compression variable alimenté au méthane, au gaz de groningue et avec un mélange méthane-éthane." Valenciennes, 1987. https://ged.uphf.fr/nuxeo/site/esupversions/0d1a9c0a-0df4-4fab-8206-316c90031798.
Повний текст джерелаNgo, Thi Linh Dan. "Characterization of soot particles and their precursors produced during the combustion of conventional and alternative fuels : an in-situ laser diagnostics and ex-situ mass spectrometry investigation." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1R040/document.
Повний текст джерелаInterest in biofuels has increased significantly in recent years as they could reduce dependence on fossil fuels and contribute to carbon-neutral growth. The influence of using biofuels on their exhaust emissions (CO,CO_2,NO_x,HC, etc.) has been studied widely. However, the effects of the nature of these alternative fuels on the physical and chemical properties of the particles and aromatic species produced are not fully understood. As part of this thesis work, we aim to study the emissions of soot particles and polycyclic aromatic hydrocarbons (PAHs) during the combustion of conventional and alternative fuels (biofuels) relevant to the automotive and aerospace sectors, while trying to highlight their influence on the formation of such pollutants. To achieve this goal, two laboratory combustors, a swirled turbulent jet burner and a Combustion Aerosol STandard (CAST), were used as soot generators. In addition, we have combined various complementary in-situ laser techniques, laser-induced incandescence and fluorescence (LII/LIF), and ex-situ two-step laser mass spectrometry (L2MS) and secondary ion mass spectrometry (SIMS). In a swirled turbulent jet flame for five fuels (Diesel, n-butanol, 50/50 Diesel/n-butanol mixture, Jet A1 and Synthetic Paraffinic Kerosene SPK), the LII and LIF profiles and properties of soot particles and their precursors with the height in the flame as well as their chemical composition were studied. Strong correlations between the results obtained with in-situ and ex-situ techniques have been demonstrated which allowed us to characterize these species spectrally and chemically. In addition, a new calibration method has been developed to directly deduce the soot volume fraction from the LII signal using the absolute radiance emitted from a light source having black body behavior. In parallel, experiments using the CAST device were conducted with aeronautical fuels (Jet A1 and SPK). In addition to the influence of the alternative fuel, the effects of a catalytic stripper (CS) on soot particles and volatile species were examined
Tai, Chia-Hui. "Trace Elemental Analysis of Ashes in the Combustion of the Binder Enhanced d-RDF by Inductively Coupled Plasma Atomic Emission Spectroscopy." Thesis, University of North Texas, 1988. https://digital.library.unt.edu/ark:/67531/metadc501168/.
Повний текст джерелаBodisco, Timothy Alexis. "In-cylinder pressure and inter-cycle variability analysis for a compression ignition engine : Bayesian approaches." Thesis, Queensland University of Technology, 2013. https://eprints.qut.edu.au/62064/11/Timothy_Bodisco_Thesis.pdf.
Повний текст джерелаHudák, Igor. "Vliv inertních plynů na charakteristické parametry spalování." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-295650.
Повний текст джерелаNabti, Brahim. "Contribution à l'étude du comportement d'un moteur diesel à préchambre alimentée à l'huile de colza." Valenciennes, 1987. https://ged.uphf.fr/nuxeo/site/esupversions/95663265-c958-4285-8c93-1f4e25558999.
Повний текст джерелаNendel, Klaus, Brit Clauß, Uwe Böttger, Peter Käferstein, Matthias Gohla, Hendrik Reimer, Helmar Tepper, and Werner Neidel. "Kopplung von energetischer Verwertung und Aufbereitung von Biomassen - Erhöhung der Wirtschaftlichkeit." Universitätsbibliothek Chemnitz, 2002. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200201220.
Повний текст джерелаKeinz, Jan. "Optimization of a Dry Low NOx Micromix Combustor for an Industrial Gas Turbine Using Hydrogen-Rich Syngas Fuel." Doctoral thesis, Universite Libre de Bruxelles, 2018. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/277234.
Повний текст джерелаDoctorat en Sciences de l'ingénieur et technologie
info:eu-repo/semantics/nonPublished
Feitosa, Marcelo Valente. "Desenvolvimento do motor de ignição por compressão alimentado por injeção direta de óleo diesel e por etanol pós-vaporizado no coletor de admissão." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-15032016-135844/.
Повний текст джерелаIt was developed a supplementary fueling system for turbocharged compression ignition, which uses diesel injected usually in the combustion chamber and post-vaporized ethanol, that is injected in the liquid state inside the intake manifold and vaporized by the energy in the compressed air. It was possible to replace up to 55% of the diesel mass by ethanol; regular and repetitive operation was verified, result of the alcohol induction in the vapor state. It was verified that engine\'s efficiency and pollutant gases emissions were quite influenced by the fueling system developed: improvements of up to 25,6% in the efficiency were possible, with maximum reductions of 81% in particulate matter and 80% in NOx, as a result of a more efficient diesel oxidation in presence of ethanol vapor. Notable reductions in the compressed air temperature were reached, making possible the substitution of the \"intercoolers\". The theoretical analysis to implantation of the developed system, on vehicles of public transportation in the metropolitan area of São Paulo, indicated economical and environmental viability.
Souza, Sandro Guimarães. "Um estudo sobre a evolução das câmaras de combustão dos motores do ciclo Otto à gasolina e sua aplicação ao etanol hidratado como combustível alternativo." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-16112004-103714/.
Повний текст джерелаIt presents the state of the art of combustion chambers of gasoline and ethanol Otto cycle internal combustion engines, where it observes qualitatively evolutive and specific aspects to the use of the ethanol as an alternative fuel. It proposes suggestions for future works, seeking the optimization of a more appropriate combustion chamber for the use of that important renewable fuel.
Cambridge, Shevonn Nathaniel. "The effect of compression ratio on emissions from an alcohol-fueled engine." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09122009-040220/.
Повний текст джерелаBatistella, Luciane. "Avaliação das emissões gasosas geradas na combustão de lodo de esgoto sanitário em combustor de leito móvel." reponame:Repositório Institucional da UFSC, 2015. https://repositorio.ufsc.br/xmlui/handle/123456789/159400.
Повний текст джерелаMade available in DSpace on 2016-02-23T04:00:51Z (GMT). No. of bitstreams: 1 337595.pdf: 6226604 bytes, checksum: 9b486ca8476925f2f0d3a410363192bc (MD5) Previous issue date: 2015
O lodo de esgoto, gerado em grande volume em estações de tratamento de águas residuais, pode ser uma matéria-prima alternativa valiosa de energia. Neste trabalho foram avaliadas as emissões gasosas da combustão de lodos de esgoto sanitário aeróbio e anaeróbio utilizando um combustor de leito móvel. Visando o aproveitamento da energia gerada na combustão, o gás de exaustão foi encaminhado para a secagem de lodo bruto e as emissões do processo global foram analisadas. De acordo com a caracterização, os lodos apresentaram poder calorífico inferior de 14,55 MJ·Kg-1 (lodo aeróbio) e 10,52 MJ·Kg-1 (lodo anaeróbio), indicando o potencial energético destes resíduos. O lodo aeróbio apresentou os maiores valores de matéria volátil, carbono fixo e poder calorífico. Na amostra sólida do lodo aeróbio foram detectadas concentrações de metais pesados e poluentes orgânicos persistentes como hidrocarbonetos policíclicos aromáticos, dibenzo-p-dioxinas policloradas e dibenzofuranos policlorados menores do que o limite estabelecido pela legislação pertinente (European Commission). A amostra sólida de lodo anaeróbio apresentou conteúdo de metais pesados menor do que o limite e concentração de hidrocarbonetos policíclicos aromáticos superior ao limite permitido pela legislação pertinente. As emissões de CO, NOx e BTEX resultantes dos testes de combustão dos lodos aeróbio e anaeróbio apresentaram concentrações menores do que o limite estabelecido pelas legislações pertinentes (CONAMA 316/02 e SEMA 16/2014). Devido ao alto conteúdo de enxofre nos lodos, as emissões provenientes do processo de combustão apresentaram elevadas concentrações de SO2. No processo global de combustão e secagem do lodo aeróbio, as emissões de BTEX e dibenzo-p-dioxinas policloradas e dibenzofuranos policlorados. foram inferiores aos limites permitidos pela legislação pertinente, enquanto que para o lodo anaeróbio foram superiores. Os hidrocarbonetos policíclicos aromáticos não foram detectados no processo global de combustão e secagem dos lodos aeróbio e anaeróbio. Como etapa complementar foi estudada a carbonização hidrotérmica de lodos de esgoto aeróbio e anaeróbio. O processo de carbonização hidrotérmica promoveu aumento do poder calorífico e carbono fixo do lodo aeróbio tornando este lodo uma matéria-prima com grande potencial para a geração de energia.
Abstract : The sewage sludge generated in large amounts in wastewater treatment plants can be a valuable alternative feedstock for power generation. In this work, the gas emissions of aerobic and anaerobic sewage sludge combustion process in a moving bed reactor was evaluated. In order to use the heat generated during combustion, the exhaust gas was applied in the raw sludge drying process and gas emissions after drying were also analyzed. Sewage sludge characterization results showed the energy potential of this residue (low calorific value of 14.55 MJ·Kg-1 to aerobic and 10.52 MJ·Kg-1 to anaerobic). The aerobic sludge presented the highest values of volatile matter, fixed carbon and calorific value. In the solid sample sludge aerobic were detected low concentrations of the heavy metals and persistent organic pollutants as polycyclic aromatic hydrocarbons and polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans. The solid sample anaerobic sludge showed low content of heavy metals and polycyclic aromatic hydrocarbons concentration above the limit established by legislation (European Commission). The concentration of CO, NOx, benzene, toluene, ethylbenzene and xylene emitted from the aerobic and anaeróbic sludge combustion processes were lower than the limits established by legislation (CONAMA 316/02 and SEMA 16/2014). The high emissions of SO2 from the combustion process are due to the high sulfur content in the sludge. The aerobic sludge emissions of benzene, toluene, ethylbenzene and xylene, polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in the overall combustion and drying process were lower than established limits by legislation, while for anaerobic sludge they were higher. The polycyclic aromatic hydrocarbons were not detected in overall combustion and drying process the sludge aerobic and anaerobic. As a complementary step, was studied the hydrothermal carbonization of the sewage sludge. The process of hydrothermal carbonization promoted increased calorific value and fixed carbon of the aerobic sludge making this sludge a raw materials of great energy potential.
Ferreira, Sérgio Lucas. "Análise por cromatografia gasosa das emissões de compostos orgânicos voláteis provenientes de motores de combustão interna." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-10022017-120021/.
Повний текст джерелаAir pollution\'s is one of the most serious environment problems concerning human animals and vegetables life. The increase of concentration of atmospheric pollutants is generated mainly due to increasing urbanization and the increase on the number of motor vehicles. The emissions caused by vehicles contain several toxic substances as: carbon monoxide (CO), nitrogen oxides (NOx), volatile organic compounds (VOC), polycyclic aromatic hydrocarbons (PAH) and others substances ending quite negative effect on health. Considering this situation, this study described the procedures of analysis of pollutant gases emitted by engines, such as volatile organic compounds (benzene, toluene, ethilbenzene, o-xylene, m-xylene and p-xylene) by using High Resolution Gas Chromatography (HRGC) applied to diesel, B10 mixture, and ethanol emissions analysis. Considering the use of diesel and B10 as fuel, a comparative studies has been performed for fossil fuel (diesel) and biodiesel by varying some parameters of the engines. Also, determination of these toxic substances in the emissions of engines had been made using ethanol as fuel. In the emissions of this type of engine varying the parameters as mixture quality and rotation had been detected benzene at concentration values 0,129 ± 0,021, 0,124 ± 0,020 e 0,132 ± 0,007 μg/mL (rich, stoichiometry and lean mixture); 0,134 ± 0,017, 0,129 ± 0,007 e 0,133 ± 0,044 μg/mL (1700 rpm, 2200 rpm and 2700 rpm, respectively) that can be proceeding from the lubricant oil. In general, for CI engine burning diesel or B10 mixture it has been observed drastically reduction in the emissions of the aromatic compounds by using B10. Especially for benzene the reduction of concentrations occurs on the level of about 24.5%. Although, it has obtained a concentration value below 1 μg/mL as much as in the using diesel and B10, this reduction is, extremely significant, to being benzene a carcinogenic compound. Moreover, the addition of biodiesel to the diesel has been showed efficient in the reduction of the pollutants emissions.
Zancanaro, Junior Flavio Vanderlei. "Análise numérica e experimental da combustão de metano em motores de combustão interna alternativos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/109158.
Повний текст джерелаSince its inception, the internal combustion engine is the alternative of delivering power most used worldwide in passenger vehicles and transportation. Indeed, it is observed in day-to-day a strong dependency on the use of engines, and currently studies aiming at its increased efficiency and reduced emissions are becoming more intense. With the great advances in the availability of computers, there is a continuing trend towards the use of computational techniques aiding in the engine designs. However, the main challenge is to simulate the highly three-dimensional, transient and turbulent flows with the turbulence and combustion models, which have good compromise with the involved physics. In this context, this work aims to develop a validation of numerical and experimental methods for evaluating the dynamic and reactive behavior of the flow in internal combustion engines. The simulation is applied to a Honda GX35 engine, which has commercial application in brushcutters, motorcycles of low cost, Unmanned Autonomous Vehicles (UAV), among others. The analysis is based on numerical solutions by the finite volume method, using the commercial software Star-CD / esice. To solve the turbulent flow the model adopted was the k-ω SST, in its Low Reynolds approach with hybrid treatment near the walls The ECFM-3Z combustion model was employed to solve the reactive flow. The fuel used was methane in the stoichiometric mixture. The numerical results are compared with experimental ones, in order to examine the state of art of these methodologies. Transient values of cylinder inside pressure, mass air flow, mass fraction of the fuel burned, in relation to the crankshaft angle and the combustion products are confronted The presence of recirculation in the intake duct and cylinder were detected and discussed. The evolutions of the internal cylinder pressure and mass flow rate of air showed a good behavior, when confronted with experimental data. The results of the burned mass fraction reveal important characteristics of engine operation.
Souza, Sandro Guimarães. "Desenvolvimento de uma câmara de combustão para um motor diesel ottorizado auxiliado por simulação 1D/3D." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18147/tde-25062015-150938/.
Повний текст джерелаThis work presents a comparative analysis between different combustion chambers, in order to elect one to provide a more suitable burning ethanol in engine originally designed to operate on diesel cycle which has been converted to operate on Otto cycle. The mixture formation process is analyzed since the port fuel injection until ignition timing in combustion chamber. This analysis is based on 1D and 3D simulations, of which models were previously validated in experimental bench.
Baranton, Stève. "Catalyseurs alternatifs pour cathodes de micropiles à combustion directe de méthanol." Poitiers, 2004. http://www.theses.fr/2004POIT2302.
Повний текст джерелаThe crossover is a major problem for the development of micro-DMFCs for which the membrane is thinner than for traditional systems. The solution studied in this work consists in using a catalyst for the oxygen reduction reaction tolerant to methanol: the iron phthalocyanine. The electrochemical study of this catalyst enabled to measure its catalytic activity, to demonstrate its total insensitivity to methanol and its selectivity with respect to the products of the oxygen reduction. However, the catalytic activity of the iron phthalocyanine decreases during the oxygen reduction in acid medium. It was possible to show by an in situ infrared spectroscopy study that the degradation mechanism is a substitution of the central ion by two protons. The precise knowledge of this mechanism enabled the integration of the iron phthalocyanine in a DMFC and a stable catalytic behavior could be observed