Tesis sobre el tema "Fuel Management System"
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Wang, Xiaoyang. "Aircraft fuel system prognostics and health management". Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/7214.
Texto completoBradley, Thomas Heenan. "Modeling, design and energy management of fuel cell systems for aircraft". Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26592.
Texto completoCommittee Chair: Parekh, David; Committee Member: Fuller, Thomas; Committee Member: Joshi, Yogendra; Committee Member: Mavris, Dimitri; Committee Member: Wepfer, William. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Thomas, Alex S. M. Massachusetts Institute of Technology. "An analysis of distributed solar fuel systems". Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/76511.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (p. 85-89).
While solar fuel systems offer tremendous potential to address global clean energy needs, most existing analyses have focused on the feasibility of large centralized systems and applications. Not much research exists on the feasibility of distributed solar fuel systems. This thesis is an attempt to understand the larger context of solar fuel systems, to examine the case for going distributed and to critically analyze a distributed solar fuel system available today in the context of a specific application. In doing so, this thesis seeks to a) provide a baseline analysis for the economic feasibility of a distributed solar fuel system based on state-of-the-art technology b) draw some general conclusions about the nature of such systems in order to provide guidance to those engaged in the development of the next generation of solar fuel systems. This study also compares the chosen baseline solar fuel system with a traditional fossil fuel-based alternative and undertakes a cost-to-emissions trade-off analysis. A key finding of this thesis is that for solar fuel systems to be viable, cost and efficiency improvements in individual sub-systems won't be sufficient. Due attention needs to be given to bring down cost of the entire system. Another key finding is that if carbon emissions are considered as a decision-making criterion in addition to cost, even at current cost levels photovoltaic hydrogen systems compare favorably with existing fossil fuel-based alternatives such as diesel generators.
by Alex Thomas.
S.M.in Engineering and Management
Kroll, Douglas M. (Douglas Michael). "Using polymer electrolyte membrane fuel cells in a hybrid surface ship propulsion plant to increase fuel efficiency". Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/61909.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (p. 59).
An increasingly mobile US Navy surface fleet and oil price uncertainty contrast with the Navy's desire to lower the amount of money spent purchasing fuel. Operational restrictions limiting fuel use are temporary and cannot be dependably relied upon. Long term technical research toward improving fuel efficiency is ongoing and includes advanced gas turbines and integrated electric propulsion plants, but these will not be implemented fleet wide in the near future. The focus of this research is to determine if a hybrid fuel cell and gas turbine propulsion plant outweigh the potential ship design disadvantages of physically implementing the system. Based on the potential fuel savings available, the impact on surface ship architecture will be determined by modeling the hybrid fuel cell powered ship and conducting a side by side comparison to one traditionally powered. Another concern that this solution addresses is the trend in the commercial shipping industry of designing more cleanly running propulsion plants.
Douglas M. Kroll.
S.M.in Engineering and Management
Nav.E.
Fallon, John E. "Naval Fuel Management System (NFMS) a decision support system for a limited resource". Thesis, Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/5166.
Texto completoIncludes supplemental material, embedded in this pdf. See page 46 of document to read instructions for accessing supplemental material.
The fuel planning for U.S. Naval operations at sea is reactive and relies upon pen and paper calculations. Decisions on where and when to refuel are complex and need a Decision Support System (DSS) to help planners maximize the benefits of the limited fuel resource. This thesis defines requirements and outlines a feasible design to develop a Naval Fuel Management System (NFMS). The variables that fuel planning rely upon are not just ship course and speed, but also the weather at the time a ship travels through a particular area. The most efficient plant configuration plays a factor in the fuel plan as well. Additionally, there are numerous ports and oilers available at any given time. Up-to-date accurate weather forecast databases are available, predicting currents and winds, which will affect the ship in the future. Fuel burn charts have been developed for each ship class outlining the most efficient plant configuration for given speeds. Transportation analysis has shown that an optimal path exists for this class of complex problems. By combining these technologies into one system, an application can be developed to accurately plan fueling operations in the future, making Navy refueling more efficient.
US Navy (USN) author
Bahrami, Milad. "Contribution to the development of a fuel cell management system". Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0025.
Texto completoThe essential challenge in using renewable energy-based electricity generation is the intermittency of resources. Therefore, new ways to store electricity is inevitable. Hydrogen as an energy carrier can deal with this issue. Hydrogen can be produced by using the excess energy of renewable energy sources. Therefore, a Polymer Electrolyte Membrane Fuel Cell (PEMFC) as a device that can directly convert hydrogen energy to electricity is an important part of this solution. The cost and durability are the major challenges to enable the diffusion of this technology in the mass market. In the frame of a multi-vectors microgrid, a Fuel Cell Management System (FCMS) is proposed and designed in this thesis that allows optimizing the reliability and life of PEMFCs through controlling the operating condition of cells to avoid electrochemical instabilities. A proposed diagnostic method along with a new hybrid power electronics architecture is the core of this FCMS. The diagnostic method can detect most of the FCMS instabilities by a new comprehensive real-time model. This model can simulate a cell in its stack environment. A hybrid power electronics architecture is developed for this FCMS that guarantees better aging of the system by separately manipulating the supplied power of cells. The proposed power electronics architecture is hybridized by a Supercapacitor (SC) that can compensate for the low dynamic of PEMFCs in supplying the fast dynamic load profiles. A Fuzzy Logic Control (FLC) method is developed as a part of the FCMS to change the reference power of the cell groups based on the model data. The proposed system and its different parts are validated through the simulation and experimental results
Neerkaje, Abhijith. "Strategies for the introduction of alternative fuel vehicles in India". Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/90697.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (pages 42-46).
Rapid growth in population and increase in disposable income has led to a robust increase in automotive sales in India. As in many parts of the world, the internal combustion engines are the dominant vehicle power train in India. This has led to increase in tailpipe emissions in congested cities as well as increased consumption of crude oil. India needs to devise effective strategies to introduce fuel efficient nonpolluting Alternative Fuel Vehicles (AFV) to reduce GHG emissions and reduce oil consumption. In 2013, the Government of India unveiled a National Electric Mobility Mission Plan to promote AFV sales in India in a coordinated manner. Many similar, well-intentioned programs have been tried in the past. However, the creation of sustainable AFV markets has remained a challenge. This work presents the development of a multiplatform system dynamics model that helps one explore the dynamics of adoption of AFVs in Indian context. Using the model we explore three unique policy scenarios where the adoption of AFVs is studied. We show that the successful AFV adoption is dependent not just on providing demand side incentives, but also on promoting the creation of the refueling infrastructure. Results also show that Plug in Hybrid Electric Vehicle has the potential to be the dominant alternative fuel vehicle platform in India provided effective policies are in place.
by Abhijith Neerkaje.
S.M. in Engineering and Management
Tipton, Austin L. "Simulation, Experimentation, Control and Management of a Novel Fuel Thermal System". Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright1578320719632833.
Texto completoTiwari, Shishir. "Improving understanding of alternative fuel vehicle market dynamics using interactive simulations". Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107358.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (pages 67-70).
Interactive management flight simulators are becoming increasingly common as a tool for teaching key concepts in management and related fields. Advocates of flight simulators suggest that the active engagement of students with experimentation and game play may even lead to enhanced systems thinking capabilities. Through this thesis, I undertake an experiment to test this proposition, recruiting respondents from Amazon's Mechanical Turk online workforce. Using a three-group pretest-post-test design, I randomly assign respondents to complete one of the following: a) Read a report describing the results of the simulator, including actual screenshots from the simulator, to convey the same information about the AFV market in a conventional style (the control group). b) Undertake tasks using an interactive management flight simulator about the diffusion of alternative fuel vehicles given instructions but no results (treatment one) and c) Undertake the same tasks using an interactive management flight simulator about the diffusion of alternative fuel vehicles, with the aid of the report that also explains the results expected (treatment two). The simulator was built on several key concepts of system dynamics applied to alternative fuel vehicle market: the concept of consumer acceptance, platform utility, stocks and flows and the effects of time delays in a system's behavior. The results of this experiment demonstrate that the groups which used simulator (treatment 1 and 2) developed at least similar and in some cases, better understanding of the AFV market dynamics. I conclude that simulators can be an effective way to teach complex system dynamics principles and socio-technical interactions.
by Shishir Tiwari.
S.M. in Engineering and Management
Allen, Christopher T. "Global Optimization of an Aircraft Thermal Management System through Use of a Genetic Algorithm". Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1220969610.
Texto completoCamacho, Gonzalez Daniel. "Techno-economic analysis of jet fuel production from waste vegetable oil in Mexico". Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107372.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (pages 47-55).
This thesis quantifies the economic feasibility of building and operating a biorefinery that converts waste vegetable oils into transportation fuels in Mexico. The hydroprocessing technology selected produces predominately diesel and jet fuel that can be used and blended with the existing fossil fuel infrastructure. The analysis shows that a 4,000 BPD plant located in Mexico can reach a positive NPV of approximately $80 million over a 20-year operating period at an internal rate of return of 15% percent. The minimum selling price for reaching this internal rate of return is $2.21 per gallon for diesel and $2.36 per gallon for jet fuel. If sufficient and reliable feedstock supply exist for a scale-up of the biorefinery to 6500 bpd, NPV increases to approximately $180 million. Sensitivity analyses shows that the NPV for the 4000 bpd facility reaches zero at an internal rate of return of 24%, and that the maximum buying price of the waste vegetable oil at the baseline internal rate of return of 15% percent the plant can afford to procure is $0.73 per gallon, which is 36% higher than the average price for the feedstock in 2013. Finally, the thesis quantifies the commercial opportunity of exporting the produced transportation fuels to the United States where they might qualify for monetary incentives. After accounting for transportation costs the NPV of fuel production in the biorefmery increases to $294 million, 368% higher than if transportation fuels are sold in Mexico.
by Daniel Camacho Gonzalez.
S.M. in Engineering and Management
Swanepoel, S. "Development of an integrated fuel management system with the aid of CPLDs". Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51688.
Texto completoENGLISH ABSTRACT: The need for a locally manufactured, cost-effective, fuel management system led to the design and development of a functional prototype. This thesis presents the design, development and full implementation of two functional prototypes. While field tests performed on the first prototype assisted in identifying necessary modifications, a need for greater complexity in support hardware was also identified. In order to comply with the cost-effective nature of the project, it was realized that this complexity could only be achieved via the implementation of a CPLD based system. Using Altera's Maxplus II design software, the CPLD code was synthesized according to the required specifications then simulated and analyzed On completion of the new CPLD based system, the second prototype, one of Altera's megacore functions is implemented and used as a substitute to an external hardware. All necessary modifications were successfully completed and the system was installed.
AFRIKAANSE OPSOMMING: Die benodiging van 'n lokale vervaardigde, koste effektiewe brandstofbeheerstelsel het gelei tot die ontwerp en ontwikkeling van 'n funksionele prototipe. Hierdie tesis dek die ontwerp, ontwikkeling en volle implementasie van twee funksionele prototipes. Terwyl toetse op die eerste prototipe gebruik is om die nodige aanpassings te identifiseer, is daar ook besef dat daar meer komplekse hardeware onderstuening benodig word. Om die koste effektiewe aard van die projek te handhaaf, is daar gesien dat die nodige kompleksieteit alleenlik deur middel van die implementering van 'n 'CPLD' gebaseerde sisteem bereik kan word. Deur gebruik te maak van Altera se Maxplus II ontwerp sagteware, is die 'CPLD' kode met die nodige spesifiekasies gesintiseer, gesimuleer en geanaliseer. Na voltooing van die tweede prototiepe, die 'CPLD' gebaseerde sisteem, is een van Altera se megacore funksies geimplementeer en gebruik as 'n plaasvervanger vir eksteme hardware. AIle nodige aanpassings is suksesvol voltooi en die sisteem is geinstalleer.
Mak, Yet Feng. "Conditions for natural gas to become an effective bridge fuel to a low-carbon future". Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/107607.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (pages 78-84).
Natural gas has commonly been described as a 'bridge fuel' that could transition U.S. from fossil fuels to a low-carbon energy system by 2050 in order to reach the internationally agreed target of limiting the global mean surface temperature to about 2 degrees Celsius (°C) above pre-industrial levels. This natural gas resource has grown tremendously over the last decade, as its production has been fueled by the use of more advanced hydraulic fracturing and horizontal drilling technologies. Being a cleaner form of fossil fuel, burning natural gas emits about half as much carbon dioxide as coal and is thought to aid in decarbonizing the nation by displacing coal as a fuel for power generation. However, the increased supply of cheap natural gas could also have an effect of delaying the advancement of renewable resources such as solar and wind. Nonetheless, optimal conditions could be explored on how natural gas can become an effective 'bridge fuel' towards a low carbon energy system. This thesis developed a system dynamics model to analyze these required conditions and found that high natural prices that rise to $26.45/mmBTU in 2050 are necessary to hit the 2°C target. An efficient policy that could drive these high natural gas prices is the carbon tax. Furthermore, another important role that natural gas serves is as a backup power source for intermittent renewable energy resources.
by Yet Feng Mak.
S.M. in Engineering and Management
Busse, Martin (Martin Augusto) 1971. "Optimization of thorium-based seed-blanket fuel cycles for nuclear power plants". Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/88336.
Texto completoLuskin, Paul (Paul L. ). "A systems engineering methodology for fuel efficiency and its application to a tactical wheeled vehicle demonstrator". Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59257.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (p. 107-112).
The U.S. Department of Defense faces growing fuel demand, resulting in increasing costs and compromised operational capability. In response to this issue, the Fuel Efficient Ground Vehicle Demonstrator (FED) program was initiated in order to demonstrate a tactical vehicle with significantly greater fuel efficiency than a Humvee while maintaining capability. An additional focus of the program was the exposure of systems engineering practices and methodologies to government engineers. This document provides an overview of a systems engineering methodology for maximizing fuel efficiency and its application in concept development for the FED program. The methodology is organized into a phased process, comprising definition of operational requirements, modeling of design alternatives, analysis of design space, development of product concepts, and prototype verification. Tools and methods used included requirements tradespace definition, provisional baseline product models, decomposition of energy expenditure over the product usage cycle, structured technology market surveys inclusive of lead users, surrogate model-based simulation tools, and design space exploration / Pareto optimization. Object-Process Methodology (OPM) is used within the document to illustrate process elements and their relationships. A key element of the methodology is the intensive use of modeling and simulation to enable data driven decision making. In particular, neural network-based surrogate models of engineering code allow the evaluation of thousands of feasible design configurations. It is intended that this rigorous framework is applicable to the improvement of any attribute of any product system.
by Paul Luskin.
S.M.in System Design and Management
Cahill, Eric C. (Eric Christopher) 1971. "Strategies for the introduction of advanced fuel/vehicle systems to the mass market". Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/29177.
Texto completoIncludes bibliographical references (p. 184-187).
The case for proactive market interventions to stimulate accelerated development and adoption of cleaner advanced fuel/vehicle systems continues to gain momentum globally. World population growth, rising national wealth, persistence of auto-centric land development patterns, and the growing popularity of truck-based platforms have reversed the trend toward lighter vehicles, higher fuel efficiencies, and cleaner emissions that began in the 1970's. Since 1984, fuel efficiency has stagnated and even declined as oil prices moved to historically low levels. Lack of consumer demand for fuel economy served to shift investment toward other measures of value such as performance and utility. The convergence of car and truck markets has further impeded progress on the fuel economy front. Industry continues to come under intensifying pressure from international and domestic concerns regarding adverse vehicle emissions impacts on public health, environmental degradation, global climate change, and national security vulnerabilities stemming from dependence on foreign oil. In response, the world's major auto conglomerates have embarked on a variety of strategies to deliver cleaner vehicles to market. Strategies span in-house and strategic partnering efforts across a range of both available and developing technologies in fuels, batteries, fuel cells, electric hybrids, and improvements to current internal combustion engine (ICE) designs. This thesis intends to examine a set of representative technological solution pathways that address two key questions for decision-makers: (1) whether market adoption of advanced fuel/vehicle systems can occur under plausible conditions, and (2) what industry strategies and public interventions can best leverage innovation to achieve the accelerated adoption of technologies beneficial to sustainability goals? To answer these questions, the work employs a system dynamics-based model in order to simulate the complex dynamics surrounding this issue. The model provides a useful framework for comprehending the relative directional impacts of varying industry strategies, public interventions, and external market and cultural forces that affect potential outcomes. The work suggests that plausible adoption scenarios are realizable within a thirty-year time horizon, but that forces deleterious to the innovative capacity of established domestic firms may significantly impede progress. I outline these forces, explain their origins, and recommend industry strategies and public interventions that appropriately address these obstacles.
by Eric C. Cahill.
S.M.
McLandrich, Andrew M. "Sensorless Control of a Bidirectional Boost Converter for a Fuel Cell Energy Management System". Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/34553.
Texto completoMaster of Science
Huston, Todd W. (Todd Wendell). "Production system design and cycle time reduction in a fuel cell manufacturing operation". Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/10910.
Texto completoIncludes bibliographical references (leaves 104-105).
by Todd W. Huston.
M.S.
Barber, Philip Alexander. "Modelling and analysis of a fuel control system for a moder automotive petrol engine". Thesis, University of Warwick, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364132.
Texto completoPIANO, ANDREA. "Analysis of Advanced Air and Fuel Management Systems for Future Automotive Diesel Engine Generations". Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2709586.
Texto completoBanvait, Harpreetsingh. "OPTIMAL ENERGY MANAGEMENT SYSTEM OF PLUG-IN HYBRID ELECTRIC VEHICLE". ProQuest, 2009. http://hdl.handle.net/1805/2095.
Texto completoPlug-in Hybrid Electric Vehicles (PHEV) are new generation Hybrid Electric Vehicles (HEV) with larger battery capacity compared to Hybrid Electric Vehicles. They can store electrical energy from a domestic power supply and can drive the vehicle alone in Electric Vehicle (EV) mode. According to the U.S. Department of Transportation 80 % of the American driving public on average drives under 50 miles per day. A PHEV vehicle that can drive up to 50 miles by making maximum use of cheaper electrical energy from a domestic supply can significantly reduce the conventional fuel consumption. This may also help in improving the environment as PHEVs emit less harmful gases. However, the Energy Management System (EMS) of PHEVs would have to be very different from existing EMSs of HEVs. In this thesis, three different Energy Management Systems have been designed specifically for PHEVs using simulated study. For most of the EMS development mathematical vehicle models for powersplit drivetrain configuration are built and later on the results are tested on advanced vehicle modeling tools like ADVISOR or PSAT. The main objective of the study is to design EMSs to reduce fuel consumption by the vehicle. These EMSs are compared with existing EMSs which show overall improvement. x In this thesis the final EMS is designed in three intermediate steps. First, a simple rule based EMS was designed to improve the fuel economy for parametric study. Second, an optimized EMS was designed with the main objective to improve fuel economy of the vehicle. Here Particle Swarm Optimization (PSO) technique is used to obtain the optimum parameter values. This EMS has provided optimum parameters which result in optimum blended mode operation of the vehicle. Finally, to obtain optimum charge depletion and charge sustaining mode operation of the vehicle an advanced PSO EMS is designed which provides optimal results for the vehicle to operate in charge depletion and charge sustaining modes. Furthermore, to implement the developed advanced PSO EMS in real-time a possible real time implementation technique is designed using neural networks. This neural network implementation provides sub-optimal results as compared to advanced PSO EMS results but it can be implemented in real time in a vehicle. These EMSs can be used to obtain optimal results for the vehicle driving conditions such that fuel economy is improved. Moreover, the optimal designed EMS can also be implemented in real-time using the neural network procedure described.
McGee, Seán. "Thermal energy management and chemical reaction investigation of micro-proton exchange membrane fuel cell and fuel cell system using finite element modelling". Thesis, KTH, Kraft- och värmeteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-173001.
Texto completoJayaraman, Sundar. "Business & technology strategies to promote the development and commercialization of alternative energy technologies like fuel cells". Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/43119.
Texto completoIncludes bibliographical references (leaves 81-82).
Globalization has led to the development of emerging markets and economies. With economic expansion around the globe, there is a greater energy demand to sustain this growth. Increasing energy demand has resulted in increase in energy prices and increase in emission levels. While conventional energy technologies have advantage in terms of established infrastructure and lower cost, they are inefficient and rely heavily on fossil fuels. Conventional energy technologies alone cannot sustain and cater to the evolving energy market's needs of higher efficiency, lower emissions and resources conservation. Renewable energy solutions and alternative energy technologies like distributed generation need to be developed to meet this energy demand, conserve the definite resources and reduce emissions. But at the moment, alternative energy technologies due to lack of infrastructure, development cost and regulations are limited in their applications. Therefore in the near term, we recommend that they strategically position themselves in the market with niche and right fit opportunities. We also recommend that they need to utilize the development dollars effectively in integrating technology development with their product development activities and develop durable cost effective products. They also need to develop key partnerships and integrate value across their development and fulfillment chains. Strategic positioning, value chain integration and key execution in development with mature processes will aid alternative energy technologies to overcome the existing market barriers and move towards rapid commercialization.
by Sundar Jayaraman.
S.M.
黃毓琛 y Yuk-sum Wong. "System design and energy management strategy for hybrid electric vehicles". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B3955885X.
Texto completoAnandhan, Muthu Mailvaganan. "Study of extended stroke gasoline engines : a thermodynamic system modelling and analysis of improvement in fuel consumption". Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/114085.
Texto completoPage 102 blank. Cataloged from PDF version of thesis.
Includes bibliographical references (page 92).
This thesis studies the benefit and challenges of using an extended stroke engine on the automotive application. For the purpose of the study, a one-dimensional thermodynamic model was built using the GT- Power software. GM LNF 2.0 liter engine was used as the candidate of study, the base model was originally developed in Sloan auto lab, and this model was used and modified for the purpose of the extended stroke operation. The study was conducted to understand the improvement in indicated specific fuel consumption (ISFC) and the net indicated efficiency of the system at various speed and load points of operations. The crank train dimensions built by Dr. Matthias Brendel, as part of his Phd dissertation, was used for the purpose of this study. The study indicates that extended stroke operation offers an ISFC reduction of about 8% at the higher loads of operation such as 20 bar of indicated mean effective pressure (IMEP). The reduction in ISFC comes down at the lower loads, and at lower IMEPs extended stroke operation shows negative ISFC reduction. This is due to over expansion loss incurred by the extended stroke operation. This study has also revealed that extended stroke engine has much higher knock resistivity due to higher volume presence at any given crank angle this allows the extended stroke engine to require less spark retard; hence, this type of engine can afford to operate at lower compression ratios and still achieve the better thermal efficiency. The extended stroke engine's behavior at lower loads indicate that there loss of efficiency up to 2% due to negative loop in the PV diagram and it also indicates that there is an increase in pumping loss in general at loads. Valve timing studies conducted to recover this loss show no significant improvement without a total change in the valve-timing phase. The effect of exhaust gas recirculation was also conducted and the extended stroke engine nearly the same way as that of base engine, however the increase in pumping loss from the extended stroke operation doesn't allow the higher stroke ratio operations to have significant increase in indicated efficiency due to EGR. The pumping loss does come down but at lesser magnitude. This indicates that the EGR could be used to mitigate the increase in pumping loss of extended stroke operation. The study with turbo-limited performance of the extended stroke engine indicates that the extended stroke engine will develop less power at any given speed due to limiting of the airflow. This is essentially one of the limitations of the extended stroke operation. Finally, the thesis concludes by pointing out the potentials and challenges of the extended stroke operation engine.
by Muthu Mailvaganan Anandhan.
S.M. in Engineering and Management
Wilson, Earle Anthony. "Investigation of renewable, coupled solar-hydrogen fuel generation with thermal management systems suitable for equatorial regions". Thesis, Brunel University, 2010. http://bura.brunel.ac.uk/handle/2438/4508.
Texto completoYue, Meiling. "Contribution of developing a prognostics-based energy management strategy for fuel cell hybrid system - application to a fuel cell/battery hybrid electric vehicle". Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCD029.
Texto completoFuel cell hybrid propulsion system is gaining momentum in today's automotive market and offers a sustainable solution for the world climate change in the transport sector. However, the durability and reliability of the power sources used in the hybrid system are the inevitable obstacles for its massive commercialization. To optimize and maximize the lifespan of the hybrid system, a prognostics and health management (PHM) approach is deployed to manage and mitigate the power source degradation behaviour and applied to a fuel cell hybrid electric vehicle.In this context, two main contributions are made. The first stage is to deploy a prognostics method that can be used in the hybrid system. Particle filtering, as a commonly used state estimation method, is adapted for prognostics purpose in this thesis. It is used to handle the imprecise and uncertain degradation data and estimate the remaining useful life. The method is validated by historical fuel cell and battery datasets and the results are evaluated by the designed prognostics metrics.Subsequently, a second stage on the health management aspect of PHM is proposed. As the split of demanded power in a hybrid system is managed by an energy management strategy (EMS), the orientation of this stage is to develop a health-conscious EMS in the context of PHM. A great quantity of researches on prognostics with finished experimental data have been found in the literature, while how to use the prognostics results to make corrective control actions is rarely discussed. To help against this vacancy in hybrid system applications, a prognostics-enabled decision-making process is designed. The performance is evaluated by quantifying the degradation and the lifetime of the system in a simulated environment and a discussion on prognostics occurrence is launched for further investigations on maintenance
Schmidt, Marc Anthony 1970. "Application of lean principles to an enterprise value stream : a lean analysis of an automotive fuel system development process". Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/88317.
Texto completoIncludes bibliographical references (p. 100-101).
This thesis shows that lean principles that have been successfully applied in manufacturing can also be successfully applied across an entire enterprise. Established lean principles and lessons learned in lean manufacturing environments are applied across an automotive fuel system enterprise. This enterprise includes all major activities used in developing and delivering fuel systems to customers from the initiation of the systems concept to final production manufacturing. The value of the enterprise's product (fuel systems) is specified in terms of enterprise customers. The value stream of the fuel system enterprise is identified and analyzed using process mapping, input/output information flow diagrams, and other techniques. Major issues in terms of waiting time, rework time, and excessive need for validation are identified using these techniques. Countermeasures against these issues are offered to facilitate a transition to a leaner state. The goal is to develop a systemic understanding of the fuel system enterprise such that lean principles and tools can be applied to its processes to improve efficiency, throughput, and value for customers. Recommendations for further study are also listed in an effort to pursue perfection by continuously improving the lean enterprise. Finally, a transition to lean implementation plan is outlined.
by Marc Anthony Schmidt.
S.M.
Tichagwa, Anesu. "Micro combined heat and power management for a residential system". Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/16914.
Texto completoLamoureux, Benjamin. "Development of an Integrated Approach for PHM - Prognostics and Health Management : Application to a Turbofan Fuel System". Thesis, Paris, ENSAM, 2014. http://www.theses.fr/2014ENAM0018/document.
Texto completoFor manufacturers of aircraft engines such as Snecma, the increase of systems availability is one of the key challenges of the future. Indeed, the limitation of delays and cancellations and the reduction of maintenance operations frequency and duration could lead to important costs savings. To improve availability, the most proven tool is currently prognostics and health management (PHM). The first contribution of this thesis work is to propose complete terminological and functional frameworks for the development of PHM adapted to the specific application on aircraft engines. Subsequently, an integrated development approach based on the original V3-model is formalized. The second contribution is an original model-based process for the development of the embedded extraction of health indicators, based on sensitivity analysis, support vector regression and original performance indicators for the validation. Since it is aimed at being performed before the entry into service, the stochastic data are issued from Monte-Carlo based uncertainties propagation. In order to overcome the prohibitive computation time of the model evaluations, surrogate models are used. More particularly, the third contribution of this thesis work is an original technique combining support vector regression with Kriging. The whole approach is finally tested on an aircraft engine fuel system. The results are promising, both at the industrial level with the release of valuable information about the quality of the health indicators set and at the academic level with the proven accuracy of the novel SVR-Kriging approach
Chen, Di. "Design and implementation of microcontroller-based direct methanol fuel cell/lithium polymer battery hybrid energy management system". Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/12579.
Texto completoWijewardane, M. Anusha. "Exhaust system energy management of internal combustion engines". Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/9829.
Texto completoYasin, Aysar Mahmoud Masoud. "Distributed Generation Systems Based on Hybrid Wind/Photovoltaic/Fuel Cell Structures". Doctoral thesis, Università di Catania, 2012. http://hdl.handle.net/10761/995.
Texto completoAbdul-Jalal, Rifqi I. "Engine thermal management with model predictive control". Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/24274.
Texto completoAlmada, Janaina Barbosa. "Modeling, Control and Management of Microgrids Operation with Renewable Sources". Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=11122.
Texto completoNowadays, the distribution networks of electricity are the segment of the electrical power systems that has experienced more changes, due in particular to the presence of distributed generation and the technological advances in the areas of instrumentation, automation, measurement, information technology and comunication. This work aims to present the modelling, the control and the operation management of a group of small-scale energy resources connected to the low voltage, which coordinated form a microgrid. The microgrid energy resources are solar photovoltaic sources, wind energy based on double fed induction generator and hydrogen fuel cell, and a storage system with batteries. Two conceptions are developed: a single-phase microgrid and a three-phase microgrid, both operating in connected mode and isolated from the utility. Each energy resource is connected to a point of common coupling through power converters. For each converter was designed a set of control loops. The master-slave strategy was used to control the converters and to microgrid management. In master-slave configuration only the master converter is designed to be the voltage reference and others operate as a current source. For managing the steady state operation of microgrids different operating scenarios were considered, with variation of load and generation levels, as well as changes in tariff flags, for load supply with economy and sources operating at maximum efficiency. The proposed systems operate satisfactorily fulfill the requirements of utility for synchronization and disconnection. The injected currents are below the allowed distortion level. In stand-alone mode, the system voltage remains within the appropriate level of amplitude and frequency.
Atualmente, as redes de distribuiÃÃo de energia elÃtrica sÃo o segmento dos siste-mas elÃtricos de potÃncia que mais tem experimentado mudanÃas, devido, em es-pecial, à presenÃa da geraÃÃo distribuÃda e aos avanÃos tecnolÃgicos nas Ãreas de instrumentaÃÃo, automaÃÃo, mediÃÃo, tecnologia da informaÃÃo e comunicaÃÃo. Este trabalho tem por objetivo apresentar a modelagem, o controle e o gerenciamento da operaÃÃo de um conjunto de recursos energÃticos de pequeno porte, conectados à baixa tensÃo, que coordenados formam uma microrrede. Os recursos energÃticos da microrrede sÃo fontes solar fotovoltaica, eolielÃtrica com gerador de induÃÃo de dupla alimentaÃÃo e cÃlula combustÃvel a hidrogÃnio, e um sistema de armazenamento de energia a baterias. Duas concepÃÃes de microrredes sÃo desenvolvidas: microrrede monofÃsica e microrrede trifÃsica, ambas operando em modo conectado e isolado da rede elÃtrica principal. Cada recurso energÃtico à conectado a um ponto comum de conexÃo atravÃs de conversores de potÃncia. Para cada conversor foi projetado um conjunto de malhas de controle. A estratÃgia mestre-escravo foi usada para o controle dos conversores e gerenciamento da microrrede. Na configuraÃÃo mestre-escravo apenas o conversor mestre à designado para ser a referÃncia de tensÃo que os outros conversores necessitam para operarem como fonte de corrente. Para o gerenciamento da operaÃÃo das microrredes em regime permanente, foram considerados diferentes cenÃrios de operaÃÃo, com variaÃÃo de nÃveis de carga e de geraÃÃo, bem como variaÃÃo de bandeiras e postos tarifÃrios, visando atender a carga com economicidade e fontes operando em mÃxima eficiÃncia. Os sistemas propostos operam de forma satisfatÃria obedecendo aos requisitos da concessionÃria para a sincronizaÃÃo e desconexÃo. As harmÃnicas de corrente injetada estÃo abaixo do nÃvel de distorÃÃo permitido. No modo isolado, a tensÃo dos sistemas permanece dentro do nÃvel adequado de amplitude e frequÃncia.
Smith, Bradley Joseph. "Steam-Assisted Catalysis of n-Dodecane as a Jet Fuel Analogue in a Flow Reactor System for Hypersonic Thermal Management". University of Dayton / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1577978953025703.
Texto completoÅkesson, Elsa, Maximilian Kempe, Oskar Nordlander y Rosa Sandén. "Unmanned Aerial Vehicle Powered by Hybrid Propulsion System". Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277115.
Texto completoIn today’s society, with several environmental challenges such as global warming, the demand for cleanand renewable fuels is ever increasing. Since the aviation industry in Sweden is responsible for the sameamount of greenhouse gas emissions as the motor traffic, a change to a non-polluting energy source forflying vehicles would be considerable progress. Therefore, this project has designed a hybrid system of abattery and a fuel cell and investigated how different combinations of battery and fuel cell sizes perform ina drive cycle, through computer modelling. As batteries possess a high specific power but are heavy, thefuel cells with high specific energy complement them with a sustained and lightweight power supply,which makes the hybrid perfect for aviation. The bachelor thesis is a part of Project Green Raven, aninterdisciplinary collaboration with the institutions of Applied Electrochemistry, Mechatronics andEngineering Mechanics at KTH Royal Institute of Techology. The drive cycle simulations were done inSimulink, and several assumptions regarding the power profile, fuel cell measurements and power weremade. Three different energy management strategies were set up, determining the fuel cell powerdepending on hydrogen availability and state of charge of the battery. The strategies were called 35/65,20/80 and 0/100, and the difference between them was at which state of charge intervals the fuel cellchanged its power output. The best strategy proved to be 0/100, since it was the only option which causedno degradation of the fuel cell whatsoever.
Vallur, Rajendran Avinash. "A Methodology for Development of Look Ahead Based Energy Management System Using Traffic In Loop Simulation". The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1514828055131881.
Texto completoNjoya, Motapon Souleman. "Design and simulation of a fuel cell hybrid emergency power system for a more electric aircraft : evaluation of energy management schemes". Mémoire, École de technologie supérieure, 2013. http://espace.etsmtl.ca/1157/1/NJOYA_MOTAPON_Souleman.pdf.
Texto completoKarbaschian, Mohammad Ali [Verfasser], Dirk [Akademischer Betreuer] Söffker y Roland [Akademischer Betreuer] Kasper. "Improving System Design and Power Management for Hybrid Hydraulic Vehicles Minimizing Fuel Consumption / Mohammad Ali Karbaschian. Gutachter: Roland Kasper. Betreuer: Dirk Söffker". Duisburg, 2014. http://d-nb.info/1064264603/34.
Texto completoKarbaschian, Mohammad Ali Verfasser], Dirk [Akademischer Betreuer] [Söffker y Roland [Akademischer Betreuer] Kasper. "Improving System Design and Power Management for Hybrid Hydraulic Vehicles Minimizing Fuel Consumption / Mohammad Ali Karbaschian. Gutachter: Roland Kasper. Betreuer: Dirk Söffker". Duisburg, 2014. http://d-nb.info/1064264603/34.
Texto completoMilhor, Carlos Eduardo. "Sistema de desenvolvimento para controle eletrônico dos motores de combustão interna ciclo Otto". Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-12032003-092253/.
Texto completoThe automotive engine management system has become an advanced control system. Its objective is to maintain the pollutants gas emissions according to legislations and to maintain the performance and driveability, at the same time. It presents the main features of a tipical internal combustion engine management system, it describes the control modes and it point out the future tendencies. It describes the control system developed, which one will be usefull as a tool for research involving control applied in this context and engine automotive efficiency optimization researchs
Mattiolo, Sandra Regina. "Diretrizes para implantação de um sistema de gestão ambiental no ciclo do combustível nuclear: estudo de caso da USEXA - CEA". Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-08032013-162445/.
Texto completoThe environmental management standards are intended to provide to the organizations the elements needed for the implementation of an Environmental Management System (EMS) that can be effectively integrated to another management requirements and assist them to achieve their environmental and economic goals. The Uranium Hexafluoride Production Unit - USEXA, located at the Navy Technological Center in São Paulo, will be the first Brazilian industrial plant responsible for the conversion stage in the nuclear fuel cycle (production of uranium hexafluoride UF6), allowing added-value to the uranium ore. The EMS proposed to USEXA in this project allows to regulate its interfaces with the environment, since the Standards of CNEN - National Commission of Nuclear Energy and of the IAEA - International Atomic Energy Agency for Nuclear Installations, aim, mostly, to attend the security criteria for the population and the environment, concerning ionizing radiation. This model of EMS fills the gaps in standards of IAEA and CNEN, since it takes into account the environmental impacts from the use of chemicals in the manufacturing process of UF6, and general aspects of sustainability. It can be considered an original contribution within the complex activities that includes the uranium processing in the nuclear fuel cycle. This research proposes, as result, the use of a filter of significance to evaluate the environmental impacts depending on the installation location. It is also presented the Management System Manual for USEXA and models for training in personnel management are suggested, such as coaching and neurolinguistic programing, which can be applied to any Management System. The trainings can be considered a preventive action as they considerably decreased incidents related to equipments maintenance and thus the occurrence of environmental impacts.
Veiga, Michel Robert. "Desenvolvimento de um gerenciador eletrônico para motores tricombustível". Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-06122010-150018/.
Texto completoThis project intended to minimize one of the main disadvantages of using natural gas vehicles, which was the loss of power, and increase their volumetric efficiency by building an electronic circuit able to efficiently manage the gas injection. The increase in volumetric efficiency is obtained through the efficient management of air-fuel mixture using a closed loop system. The management of the power and economy ratio is achieved with the simultaneous use of natural gas and liquid fuel. In the current conversion systems and original vehicles that use natural gas, the power loss is compensated by turning off the gas system and using only the liquid fuel. This selection is done manually in most conversion systems, and automatically at Fiat Siena Tetrafuel, not allowing the simultaneous use of gas to liquid fuel. The demand for power is measured by the angle of the accelerator pedal. When the power demand is low, the system operates only with natural gas. When intermediate power is required, the system operates with different proportions of ethanol and natural gas. For maximum power, only ethanol is used. Comparisons were made between the conventional and the proposed system through dynamometer tests, road tests and emission analyses. The Volkswagen Gol with original system using only ethanol has a maximum power of 64.06 horses (47.77 Kilowatts) and consumption of 12.6 kilometers per liter of ethanol. With conventional aspirated natural gas system, the consumption was 21 km per cubic meter and the power did not exceed 51.82 horses (38.64 Kilowatts). With the prototype, volumetric efficiency increases by 25%, with consumption of 26.4 kilometers per cubic meter. The power management provides intermediate powers up to 51.82 horses (38.64 Kilowatts) until the maximum power of 64.06 horses (47.77 Kilowatts) in situations where more power is required. The developed system provides the benefit of refueling flexibility found in the original system, with power flexibility not available in original systems.
Manning, Peter Christopher. "Development of a Series Parallel Energy Management Strategy for Charge Sustaining PHEV Operation". Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/49436.
Texto completoMaster of Science
Haus, Sylvia. "Climate impact of the sustainable use of forest biomass in energy and material system : a life cycle perspective". Doctoral thesis, Linnéuniversitetet, Institutionen för byggd miljö och energiteknik (BET), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-69561.
Texto completo伸宜, 奥井 y Nobunori Okui. "新方式ハイブリッドシステム搭載長距離貨物トラックの燃料消費率改善に関する研究". Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13097335/?lang=0, 2018. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13097335/?lang=0.
Texto completo博士(工学)
Doctor of Philosophy in Engineering
同志社大学
Doshisha University
McFarlane, Alexander. "Biofilm development and management in aircraft fuel systems". Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/17655/.
Texto completoVagg, Christopher. "Optimal control of hybrid electric vehicles for real-world driving patterns". Thesis, University of Bath, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648946.
Texto completoFolkesson, Anders. "Towards sustainable urban transportation : Test, demonstration and development of fuel cell and hybrid-electric buses". Doctoral thesis, KTH, Energiprocesser, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4721.
Texto completoQC 20100722