Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 165 for “"Fuel-Efficiency"”.
-
Predictive modeling of fuel efficiency of trucks
… several controllable variables that affect the fuel efficiency of trucks. Re-routing is the process of modifying the parameters of the routes for a set of trips to optimize fuel consumption and also to increase customer satisfaction through efficient deliveries. This is an important process …
-
Analytics for Sustainable Logistics: Fuel Efficiency and Hydrogen Planning
… machine learning approaches to enhance fuel efficiency in existing operations as well as stochastic optimization to plan the deployment of hydrogen production facilities in future operations. In Chapter 2, we employ data-driven techniques to explore the drivers of fuel efficiency in the …
-
On generating driving trajectories in urban traffic to achieve higher fuel efficiency
… signals based on a model of second-by- second fuel consumption. To this purpose, we employ an instantaneous fuel consumption model and formulate an optimization problem for fuel mini- mization. Following the problem formulation, we explore different numerical ways to solve the minimization …
-
Investigation of the Impact of Turboprop Propulsion on Fuel Efficiency and Economic Feasibility
… the purposes of economic feasibility and energy efficiency. A baseline vehicle and a derivative vehicle were researched and analyzed in detail. Based on the findings of this analysis, an advanced future airliner was designed. For the advanced airliner, advanced technologies were suggested and …
-
Influence of Architecture Design on the Performance and Fuel Efficiency of Hydraulic Hybrid Transmissions
… to electric hybrids for increasing the fuel efficiency of on-road vehicles. To further the state-of-the-art this work investigates how architecture design influences the performance, fuel efficiency, and controllability of hydraulic hybrid transmissions. To that end a novel neural …
-
The historical fuel efficiency characteristics of regional aircraft from technological, operational, and cost perspectives
… future. Recently, this rapid growth has fueled concern about the contribution of aviation activities to global climate change. Governments, airlines and manufacturers are currently debating the feasibility and effectiveness of various strategies aimed at mitigating the environmental …
-
The impact of aircraft design reference mission on fuel efficiency in the air transportation system
… mission flexibility, which results in decreased fuel efficiency throughout the operational life of an aircraft. The objective of this research is to quantify the impact of this practice and other non-optimal emergent behaviors of the current global air transportation system. The analysis focuses …
-
The design of a prototype Otto-Atkinson engine and evaluation of the part load fuel efficiency
… cycle, as a means of improving the part load fuel efficiency of spark-ignition engines. The primary objective of this thesis was to investigate the technical feasibility of the modified Atkinson cycle as a spark-ignition engine concept and thus to quantify the associated potential for greater …
-
Impact of Liquefied Natural Gas usage and payload size on Hybrid Wing Body aircraft fuel efficiency
… in the context of Liquefied Natural Gas (LNG) fuel usage and payload/range scalability at three scales: H1 (B737), H2 (B787) and H3 (B777). The aircraft were optimized for reduced fuel burn and airframe noise at approach, based on NASA N+3 goals for the 2030 timeframe. Well-to-wake greenhouse …
-
A systems engineering methodology for fuel efficiency and its application to a tactical wheeled vehicle demonstrator
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 …
-
Approaches to representing aircraft fuel efficiency performance for the purpose of a commercial aircraft certification standard
… a commercial aircraft certification standard, a fuel efficiency performance metric and the condition at which it is evaluated must be determined. The fuel efficiency metric form of interest to this research is fuel/range, where fuel and range can either be evaluated over the course of a reference …
-
Using polymer electrolyte membrane fuel cells in a hybrid surface ship propulsion plant to increase fuel efficiency
… 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 …
-
Implementation of work standardization to improve the fuel efficiency ratio in an SMB in the hydrocarbon transportation sector
… transportation sector, especially due to high fuel consumption. According to the Ministry of Energy and Mines (Minem,2023), land transportation activity increased by 6.7% in the last year, which highlights the need to implement strategies that optimize distribution efficiency. This research …
-
Using real-time truck transportation information to predict customer rejections and refrigeration-system fuel efficiency in packaged salad distribution
… to analysis in this thesis are reefer-unit fuel consumption and rejections of salad products at the customer's drop location. Regression yields a formula that can predict more than 70% reefer fuel consumption. However, with the independent variables available in the data at our disposal, it …
-
Assessment of the ability of existing airport gate infrastructure to accommodate transport category aircraft with increased wingspan for improved fuel efficiency
The continuous trend of rising fuel prices increases interest in improving the fuel efficiency of aircraft operations. Additionally, since fuel burn is directly linked to aircraft CO2 emissions, reducing fuel consumption has environmental benefits. One approach to reducing airline cost and …
-
Benchmarking, Characterization and Tuning of Shell EcoMarathon Prototype Powertrain
… industry ever striving to push the limits of fuel efficiency, the Shell EcoMarathon offers a glimpse into this energy conserving mindset by challenging engineering students around the world to design and build ultra-efficient vehicles to compete regionally. This requires synchronization of …
-
Design of control for efficiency of AUV power systems
… This study analyzes the optimization of time and fuel efficiency in systems of this type. First, the battery charging scheme for optimal time efficiency was investigated through theoretical simulation of the REMUS battery recharging, based on typical curves for lithium ion battery charging. …
-
Development of a powertrain control algorithm for a compound-split diesel hybrid-electric vehicle
… crossover utility vehicle (CUV) and evaluate the fuel consumption and greenhouse gas emissions benefits that can be realized compared to existing non-hybrid, gasoline-powered CUVs. This was achieved through the implementation of engine on/off functionality, regenerative braking, and electric-only …
-
Design space exploration and optimization using modern ship design tools
… of the hullform, the selection of engines for fuel efficiency, and the loading of engines for fuel efficiency. The detailed ship design explores the design space given a set of specific requirements for a cruiser-type naval vessel. The hullform optimization technique reduces a ships residual …
Page 1 of 9