Dissertations / Theses on the topic '621.43.06:621.436'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 25 dissertations / theses for your research on the topic '621.43.06:621.436.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Demosthenous, Alexis. "Soot formation and oxidation in a high-pressure spray flame." Thesis, Queen Mary, University of London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424461.
Full textVargas, Gabriella Margarita Ascanio. "Performance monitoring and full diagnosis of a diesel engine turbocharger." Thesis, University of Sussex, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494826.
Full textTalbot-Weiss, Jonathan. "SFC improvements from turbo-generating heavy-duty diesel engines." Thesis, University of Sussex, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496856.
Full textPlianos, Alexandros. "Nonlinear modelling and control of turbocharged diesel engines." Thesis, University of Sussex, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.496800.
Full textParra, Fernando Lopez. "Computational study on the effect of fuel stream perturbations on soot and NOx emissions in turbulent diffusion flames and applications to IC diesel engines." Thesis, University of Manchester, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488992.
Full textNivesrangsan, Pornchai. "Multi-source, multi-sensor approaches to diesel engine monitoring using acoustic emission." Thesis, Heriot-Watt University, 2004. http://hdl.handle.net/10399/1124.
Full textTan, Yiping. "Automotive diesel turbocharger investigation." Thesis, University of Bath, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437605.
Full textZweiri, Yahya Hashem. "Non-linear modelling and estimation for diesel engines." Thesis, King's College London (University of London), 2003. https://kclpure.kcl.ac.uk/portal/en/theses/nonlinear-modelling-and-estimation-for-diesel-engines(6cc4a92f-924e-4223-93c2-3c010321a5a5).html.
Full textStewart, Jill. "Combustion diagnostics of a dual fuel CI engine : an experimental and theoretical study." Thesis, Loughborough University, 2006. https://dspace.lboro.ac.uk/2134/7840.
Full textMcGowan, D. J. "Integration of gen-set control." Thesis, Queen's University Belfast, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411043.
Full textBrooks, Thomas D. "Split-main fuel injection strategies for diesel engines and their influence on emissions and fuel consumption." Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417186.
Full textSautermeister, Falko Alexander. "Piston ring lubrication-influence of sulphuric acid formation from high sulphur content fuel." Thesis, University of Leeds, 2012. http://etheses.whiterose.ac.uk/3132/.
Full textRodríguez, Álvaro Díez. "Investigation of split injection in a single cylinder optical diesel engine." Thesis, Brunel University, 2009. http://bura.brunel.ac.uk/handle/2438/3666.
Full textKarimi, Kourosh. "Characterisation of multiple-injection diesel sprays at elevated pressures and temperatures." Thesis, University of Brighton, 2007. https://research.brighton.ac.uk/en/studentTheses/fb409ae5-a775-4473-bcc6-85f4dae97790.
Full textХамза, Хамза Алі Адел. "Вибір та обґрунтування параметрів дизель-електричної станції з системою утилізації теплоти." Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31934.
Full textDissertation for the degree of candidate of technical sciences in specialty 05.05.03 – engines and power plants. – National Technical University "Kharkiv Polytechnic Institute". – Kharkiv, 2017. The dissertation is devoted to the choice and substantiation of parameters of a diesel power plant with heat recovery system of recycling the secondary heat from diesel engine using the Rankin cycle, which uses the heat of exhaust gases and cooling water systems. As a result of the analysis of the features of a promising power plant with a Hyundai 25/33 engine for the production of electric power at a plant in Iraq, a technological scheme of a comprehensive system for recycling diesel fuel from an electric power station with the additional generation of electricity, heat for heating heavy fuel, condensing technical water from exhaust gases. As a working fluid in the Rankin cycle, it is advisable to use the hot water from the engine cooling system. Using the developed mathematical model of the distillation circuit of the diesel power plant, the design-experimental study of the influence of the ambient temperature on the indicators of the efficiency of heat recovery was performed. When the ambient temperature changes from 0 ° C to 40 ° C, the amount of electric energy generated by the Rankin cycle for the Hyundai H25 / 33 engine increases to 10%. With a single cogeneration unit with a Hyundai H25 / 33 engine and a recycling complex developed, it is possible to get up to 2300 kg of water vapor condensate per day, which is very valuable in Iraq. Based on the results of the study, two variants of the technological scheme (projects A and B) were developed for the modernization of Hyundai diesel power plants. The feasibility study for the NPV method has shown that after the full recovery equipment is put into operation, the maximum achievable profit will be about 1 406 219 $ /year.
Hamza, Hamza Ali Adel. "Selection and justification the parameters of diesel power plant with heat recovery system." Thesis, NTU "KhPI", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31664.
Full textДисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.05.03 – двигуни та енергетичні установки. – Національний технічний університет "Харківський політехнічний інститут". – Харків, 2017. Дисертація присвячена вибору і обґрунтуванню параметрів дизель-електричної станції з системою утилізації вторинної теплоти дизеля з використанням циклу Ренкіна, що використовує теплоту відпрацьованих газів та системи охолодження. В результаті аналізу особливостей перспективної енергетичної установки з двигуном Hyundai 25/33 для виробництва електричної енергії на заводі в Іраку розроблена технологічна схема комплексної системи утилізації вторинної теплоти дизель-електричної станції з додатковим отриманням електроенергії, теплоти для підігріву важкого палива, конденсації технічної води з відпрацьованих газів двигуна. Для утилізації вторинної теплоти двигуна Hyundai H25/33 запропоновано утилізаційний контур установки, який працює за органічним циклом Ренкіна (ОЦР). В якості робочого тіла в циклі Ренкіна доцільно використовувати воду системи охолодження двигуна. З використанням розробленої математичної моделі утилізаційного контуру дизель-електростанції виконане розрахунково-експериментальне дослідження впливу температури навколишнього середовища на показники ефективності утилізаційного контуру. При зміні температури навколишнього середовища від 0 ° С до 40 ° С кількість електроенергії, виробленої за циклом Ренкіна для двигуна Hyundai H25/33 збільшується до 10%. При роботі однієї когенераційної установки з двигуном Hyundai H25/33 та розробленим утилізаційним комплексом можна отримати на добу до 2300 кг конденсату водяної пари, що є дуже цінною в Іраку. На основі результатів дослідження було розроблено два варіанта технологічної схеми (проекти "А" та "Б") модернізації дизельних електростанцій компанії Hyundai Heavy Industries. Виконана техніко-економічна оцінка проектів за метод NPV показала, що після того, як обладнання утилізаційного контуру в повному обсязі буде введено у експлуатацію, максимально досяжний прибуток складе близько 1 406 219 дол. США/рік.
Хамза, Хамза Алі Адел. "Вибір та обґрунтування параметрів дизель-електричної станції з системою утилізації теплоти." Thesis, НТУ "ХПІ", 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31663.
Full textDissertation for the degree of candidate of technical sciences in specialty 05.05.03 – engines and power plants. – National Technical University "Kharkiv Polytechnic Institute". – Kharkiv, 2017. The dissertation is devoted to the choice and substantiation of parameters of a diesel power plant with heat recovery system of recycling the secondary heat from diesel engine using the Rankin cycle, which uses the heat of exhaust gases and cooling water systems. As a result of the analysis of the features of a promising power plant with a Hyundai 25/33 engine for the production of electric power at a plant in Iraq, a technological scheme of a comprehensive system for recycling diesel fuel from an electric power station with the additional generation of electricity, heat for heating heavy fuel, condensing technical water from exhaust gases. As a working fluid in the Rankin cycle, it is advisable to use the hot water from the engine cooling system. Using the developed mathematical model of the distillation circuit of the diesel power plant, the design-experimental study of the influence of the ambient temperature on the indicators of the efficiency of heat recovery was performed. When the ambient temperature changes from 0 ° C to 40 ° C, the amount of electric energy generated by the Rankin cycle for the Hyundai H25 / 33 engine increases to 10%. With a single cogeneration unit with a Hyundai H25 / 33 engine and a recycling complex developed, it is possible to get up to 2300 kg of water vapor condensate per day, which is very valuable in Iraq. Based on the results of the study, two variants of the technological scheme (projects A and B) were developed for the modernization of Hyundai diesel power plants. The feasibility study for the NPV method has shown that after the full recovery equipment is put into operation, the maximum achievable profit will be about 1 406 219 $ /year.
McGhee, Michael James. "Factors influencing cycle-by-cycle combustion characteristics of a diesel engine under cold idling conditions." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13179/.
Full textGambrill, Richard. "The sensitivity of diesel engine performance to fuel injection parameters at various operating points." Thesis, University of Nottingham, 2004. http://eprints.nottingham.ac.uk/11253/.
Full textСукачов, Іван Іванович. "Поліпшення паливної економічності форсованих дизелів шляхом узгодження характеристик вприскування палива та форми камери згоряння." Thesis, НТУ "ХПІ", 2005. http://repository.kpi.kharkov.ua/handle/KhPI-Press/3555.
Full textDissertation is devoted to the study of features of processes formations of working mixture and combustion in the forced diesels and choice of rational parameters of descriptions of injection of fuel and form of combustion chamber. It is a research object judicial Ships and diesel engines diesels of dimension: 25/27, 25/34, 26/34, 26/27 and 32/32. A specific and features of processes of formations of working mixture and combustion is considered in the forced diesels. The found out the principal reasons of decline of speeds of evaporation and combustion of megascopic cyclic portions is fuels and certain methods and methods of concordance of descriptions of injection of fuel and form of combustion chamber. Developed mathematical model of cycle of diesel, complex of software for the calculation of working process, in that number, descriptions of injection of fuel, division of fuel in a stream and combustion, descriptions of formations of working mixture and combustion chamber. Executed calculation-experimental researches for the concordance of descriptions of injection of fuel and chambers combustions, which allowed grounded to choose the rational parameters of fuel apparatus, descriptions of injection of fuel and form of combustion chamber, which provided the decline of operating cost of fuel in the explored diesels on 1,5-3%.
Simon, Antoine. "Optimisation énergétique de chaînes de traction hybrides essence et Diesel sous contrainte de polluants : Étude et validation expérimentale." Thesis, Orléans, 2018. http://www.theses.fr/2018ORLE2010.
Full textPowertrain hybridization is a solution that has been adopted in order to conform to future standards for emissions regulations. The supervisory strategy of the hybrid powertrain divides the power emitted between the internal combustion engine and the electric machine. In past studies, this strategy has typically responded to an optimization problem with the objective of reducing consumption. However, in addition to this, it is now necessary to take pollutant emissions into account as well. The after-treatment system, placed in the exhaust of the engine, is able to reduce pollutants emitted into the atmosphere. It is efficient from a certain temperature threshold, and the temperature of the system is dependent on the heat brought by the exhaust gas of the engine. The first part of this dissertation is aimed at modelling the energy consumption and pollutant emissions of the hybrid powertrain. The efficiency model of the after-treatment system is adapted for use in two different contexts. The zero-dimensional model conforms to the constraints of the optimal control calculation. The one-dimensional model associated with a state estimator can be embedded in a vehicle and calculated in real time. From this work, the second part of this dissertation deduces supervisory strategies from the optimal control theory. On the one hand, Bellman’s principle is used to calculate the optimal control of a Diesel hybrid vehicle using different supervisory criteria, each having more or less information about the after-treatment system efficiency over NOX emissions. On the other hand, a strategy from Pontryagin’s minimum principle, embedded in a gasoline hybrid vehicle, running in real time and calibrated with two parameters, is proposed. The whole of this work is validated experimentally on an engine test bed and shows a significant reduction in pollutant emissions for a slight fuel consumption penalty
Castro, Joana Daniela Fernandes de. "Avaliação do potencial de produção de biodiesel a partir de algas." Master's thesis, 2012. http://hdl.handle.net/1822/34478.
Full textCom o presente trabalho pretendeu-se estudar à escala laboratorial a viabilidade técnica da produção de biodiesel a partir de microalgas, particularmente as microalgas Chlorella Ermersonii (C.E.) e Botryococcus Braunii (B.B.). Para tal foram estudadas e avaliadas as várias etapas que integram o processo de produção nomeadamente o cultivo e o crescimento das microalgas e a extração do óleo por distintas metodologias e técnicas com vista à sua posterior transformação em biodiesel. Os resultados indicam uma extração máxima de 4% de óleo utilizando a Chlorella Ermersonii (C.E.) e 2,5% utilizando a Botryococcus Braunii (B.B.). Devido à reduzida percentagem de óleo obtido nos processos de extração estudados para ambas as espécies de microalgas, não foi possível realizar os ensaios de produção de biodiesel pelo método de transesterificação, conforme foi preconizado nos objetivos da presente dissertação. Paralelamente, foi realizado um estudo relativo à possibilidade de obtenção de óleo e posterior produção de biodiesel quer a partir de algas marinhas da orla costeira da zona Norte de Portugal (Sargaço e Bodelha) quer a partir de oleaginosas, semente de girassol, de amendoim e de abóbora. A produção de biodiesel a partir de óleos alimentares usados e óleos virgens foi igualmente levada a cabo no âmbito do trabalho, por processo de transesterificação básica utilizando o metanol (álcool) e o hidróxido de sódio (catalisador), tendo-se efetuado a sua caracterização e avaliação do cumprimento dos requisitos, de acordo com a norma EN14214. Os resultados obtidos no presente trabalho permitiram concluir que o sistema de cultura semi-aberta das microalgas não se revela eficaz, ao contrário do fotobioreactor o qual assegura as condições operatórias necessárias ao aumento da biomassa. Apesar de as microalgas apresentarem um teor em óleo superior a 40%, a principal limitação da sua utilização como matéria-prima prende-se com as dificuldades técnicas associadas à extração do óleo. Foi assim impossível obter biodiesel a partir destas, considerando os meios técnicos disponíveis no CVR. Relativamente às algas marinhas, nomeadamente o sargaço, pode constituir uma potencial matéria-prima para a produção de biodiesel, tendo sido possível extrair 26% de óleo por extração química, com hexano. Resultados inferiores foram obtidos para a espécie bodelha. Para os óleos alimentares usados e óleos virgens, o rendimento de transformação em biodiesel foi elevado, como evidenciado pelos parâmetros de qualidade. No entanto, os procedimentos experimentais não permitiram a obtenção de óleo virgem diretamente a partir de sementes oleaginosas.
In this work we intended to study laboratory-scale technical feasibility of biodiesel production from microalgae, particularly Chlorella ermersonii (C.E.) and Botryococcus braunii (BB). To achieve project goals, we proceed to study and evaluate the various steps that comprise the process of production, including growing of microalgae and extraction of the oil by different methodologies and techniques, for the further transformation into biodiesel. The results obtained indicate a maximum of 4% extraction of oil using Chlorella ermersonii (C.E) and 2.5% using Botryococcus braunii (B.B.). Due to the small percentage of oil obtained in the extraction processes studied for both species of microalgae, it was not possible to perform tests of biodiesel production trhough the transesterification method, as indicated in the objectives of this dissertation. In parallel, it was studied the possibility of obtaining oil for subsequent production of biodiesel from marine algae from the shoreline in the North of Portugal (Bodelha and Sargasso) either from oilseeds, sunflower seed, peanut and Pumpkin. The production of biodiesel from used cooking oil and virgin oils was also carried out in the work, in both cases, was produced using a basic transesterification process using methanol (alcohol) and sodium hydroxide (catalyst), and the characterization and assessment of compliance in accordance with standard EN14214. The results obtained in this study indicate that the semi-open culture system of microalgae revealed to be not effective, unlike in fotobioreactor, which ensures the operating conditions required to increase the biomass production. Although the present microalgae obtained an oil content exceeding 40%, the major limitation for their use as raw material for production of biodiesel, relates to the technical difficulties associated with oil extraction. It was thus impossible to obtain biodiesel from microalgae, considering the technical means available in the CVR. For the marine algae, in particular Sargasso, it can be a potential feedstock for biodiesel production, being possible to extract 26% of this type of algae oil, using a chemical extraction method, with hexane. Lower results were obtained for the species Bodelha. For cooking oils and as well for virgin oils, the transformation into biodiesel yield was higher, as evidenced by the quality parameters shown. However, the experimental procedures do not allow the production of crude oil directly from the oleaginous seeds.
Lopes, David Quéli Matos. "Otimização de motores diesel para funcionamento com biodiesel." Master's thesis, 2014. http://hdl.handle.net/1822/34355.
Full textO objetivo deste trabalho passa por comparar as prestações de um motor diesel, para um mesmo limite legal de fumos, quando alimentado por gasóleo e biodiesel. Ainda, pretende-se comparar os resultados obtidos, em binário, potência, consumo e rendimento, entre os vários combustíveis utilizados. Inicialmente, é realizada uma análise à literatura, onde se estuda a combustão, sistemas de injeção, e parâmetros de desempenho do motor. Ainda, é feito um estudo a vários combustíveis, entre eles o gasóleo, o biodiesel e o bioóleo, e à forma como estes podem afetar a performance do motor. Entre as propriedades dos combustíveis é abordado o índice de cetano, o poder calorífico, massa volúmica, compressibilidade, lubricidade, entre outros. No que diz respeito à componente prática do trabalho, é feita uma instalação experimental, na qual se cria uma bancada de testes para o motor Peugeot adquirido, juntamente com todos os tipos de ligações necessárias: circuito do líquido de arrefecimento, instalação elétrica do motor e restantes componentes. Numa fase posterior, são apresentados procedimentos para a calibração do freio dinamométrico, procedimentos para testes de lubricidade, de atrito e de viscosidade. O trabalho culmina com os testes do motor em duas fases distintas: motor limitado eletronicamente e motor desbloqueado. Posteriormente é feita a respetiva análise de resultados, tendo em conta os diversos combustíveis utilizados para teste com o motor (gasóleo e três referências distintas de biodiesel). Relatam-se, também, alguns processos de reparação e modificação de alguns componentes do motor.
The objective of this work is to compare the performance of a diesel engine, in the same legal smoke limit, when fueled by diesel and biodiesel. Furthermore, it is intended to compare the results obtained, in torque, power, consumption and efficiency, between the multiple fuels utilized. Initially, a literature survey is made, where the combustion is studied, along with injection systems, and parameters of the engine’s performance. Also, a study is made on different fuels, such as diesel, biodiesel and biooil, and the way how these can affect engine performance. Some of the fuel properties mentioned include the cetane number, heat value, density, compressibility, lubricity, etc. When it comes to practical component of the work, an experimental installation is made, where a test stand for the Peugeot engine is created, as well as all its the connections needed: coolant fluid circuit, electrical circuit. At a later stage, procedures are presented for the calibration of the dynamometer break, for the lubricity tests, for the friction tests and viscosity tests. This work culminates with the tests with the engine in two distinct phases: electronically blocked engine and unblocked engine. Afterwards, a result analysis is made, considering the multiple fuels used (diesel and three different biodieseis as well as its characteristics. It’s also reported some of the reparations and modifications made to components of the engine.
Πήλιουρας, Φίλιππος. "Ανάλυση στατικής και δυναμικής ευστάθειας ασύγχρονων ηλεκτρικών κινητήρων μεγάλης ισχύος τροφοδοτούμενων μέσω δηζελογεννήτριας." Thesis, 2009. http://nemertes.lis.upatras.gr/jspui/handle/10889/2549.
Full text-
Pacheco, Nuno Miguel Freitas. "Teste de motor diesel com biocombustíveis." Master's thesis, 2013. http://hdl.handle.net/1822/28227.
Full textEste trabalho tem por objetivo testar o funcionamento de um motor diesel, quando alimentado com biocombustível (biodiesel e/ou outros), de modo a verificar as suas características em termos de potência, consumos, e de emissões gasosas no funcionamento do motor, e do veículo. Num estudo inicial sobre o estado da arte, após uma breve descrição do processo de produção, são analisadas as principais características dos combustíveis bem como o efeito da sua utilização no motor, designadamente no seu desempenho, nos consumos, a compatibilidade com sistemas auxiliares, e emissões poluentes. O biodiesel apresenta menor poder calorífico do que o gasóleo, pelo que ao usar-se os mesmos parâmetros de injeção usados com gasóleo, o resultado é a obtenção de menor binário e menor potência. No entanto, dado que o biodiesel tem maior índice de cetano, o motor poderá apresentar maior rendimento térmico. Uma parte importante deste trabalho é a sua componente prática. Para a realização dos testes foi necessário proceder à adaptação do laboratório, e bastante trabalho em torno de vários motores e diferentes equipamentos. Apesar desta investigação se centrar num tipo de motor diesel, concretamente em motores de 4 cilindros, foi necessário intervir em motores a gasolina (Opel de 4 cilindros, e BMW tricilíndrico) e num motor diesel monocilíndrico (Yanmar), com o qual se efetuou o estudo, mercê das alterações ao objetivo inicial, decorrentes de restrições de vária ordem, que se verificaram no decorrer do projeto. No que concerne ao estudo propriamente dito, são, neste documento, apresentados os resultados obtidos com gasóleo, biodiesel e misturas binárias B25, B50 e B75. Numa análise aos diversos parâmetros estudados, quando comparado com o gasóleo, o B100 apresenta menor binário e menor potência, revelando consumos específicos ligeiramente inferiores aos do gasóleo, em quase todas as velocidades de rotação. Todavia, em termos de rendimento médio o B100 apresenta um rendimento superior ao do gasóleo, sendo o B25 o combustível que apresenta melhores resultados. Quanto às emissões de escape, todos os combustíveis apresentaram valores que excedem o limite de trabalho do equipamento utilizado na medição, e portanto o limite legal, o que poderá sugerir problemas no funcionamento do motor.
This work aims to test the operation of a diesel engine, when fueled with biofuels (biodiesel and/or others), in order to check their characteristics in terms of power, consumption and emissions, in the operation of the engine and of the vehicle. A detailed State of the art study was made. It included not only a brief description of the process of biofuel production and main characteristics, but also the effect of their use in the engine, namely in its performance, consumption, compatibility with auxiliary systems, and pollutant emissions. The biodiesel has lower calorific value than the diesel fuel. When using the same parameters used with diesel fuel injection, the result is obtaining less torque and less power. However, since the biodiesel has higher cetane number, the engine normally displays a greater thermal efficiency. The main part of this work was the experimental comparison of standard Diesel and Biodiesel fuels. To accomplish the tests it was necessary to previously adapt the lab, and a lot of work around different engines and different equipment had to be done. Despite this investigation being focused on a specific type of diesel engine, 4-cylinder engine in particular, in order to accomplish the present work it was necessary to intervene in gasoline engines (4 cylinder Opel and 3 cylinder BMW) and a single-cylinder diesel engine (Yanmar). So, it was necessary to redirect the object of the study defined in the initial goal, due to various types of external constraints, which have occurred during the project. With regard to the study itself, in this document the results obtained with diesel, biodiesel and binary mixtures, B50 and B25 B75 is presented. Considering various parameters studied, when compared with the diesel, the B100 presents lower torque and power, revealing specific consumptions slightly lower than those of diesel, in nearly the whole rotation speed range. However, in average terms, the B100 presents a higher efficiency than diesel, with the B25 fuel showing the best results. With regard to exhaust emissions, all fuels showed a value that exceeds the limit of the equipment used in the measurement, which suggests problems in the operation of the engine.