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 225 for “"System efficiency"”.
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Modeling System Efficiency in Mixed-Model Assembly Lines
This thesis details the development of a system efficiency model at the Nissan Smyrna Vehicle Assembly Plant. System efficiency at Nissan is one measure of performance used to allocate new business to plants, and in pursuit of this new business, leaders at the Smyrna Plant maintain a continuous …
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Switching Frequency Effects on Traction Drive System Efficiency
… being studied today as a means of improving fuel efficiency. To that end, this work studies the effect of switching frequency on the efficiency of a hybrid electric vehicle traction drive, which contains both an internal combustion engine as well as electric motor. Therefore improving the …
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On site measurements of kraft pulp pump system efficiency
… pumps for potential energy savings. Field pump efficiency tests are required to assess pumping performance and help to identify improvement opportunities. This work concerns the on-site measurements of pulp-suspension pumping efficiency. This involves the measurement of pump head, flow rate and …
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Production System Efficiency Optimization Using Hybrid AI Solution and Sensor Data
Achieving operational excellence and efficiency is a constant goal in manufacturing and production, driven by the need to reduce waste and optimize processes in today’s competitive environment. The era of Industry 4.0 offers advanced technologies such as Artificial Intelligence (AI), robotics, IoT …
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Multiple Input Single Output Converter with Uneven Load Sharing Control for Improved System Efficiency
… a controller to maximize the overall converter’s efficiency. The premise of this thesis is to create uneven load current sharing between the converters at different loading conditions in order to maximize the efficiency of the overall MISO converter. The goal is to find a proper ratio of current …
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Evaluating the Effect of Smart Parking Technology on Campus Parking System Efficiency using Discrete Event Simulation
… to investigate the effect of smart parking systems (SPS) on parking search times (PST) in large parking lots. SPSs are systems that disseminate real-time parking spot availability to drivers searching for parking. The literature review revealed discrete event simulation (DES) to be a …
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The assessment of water supply system efficiency and water quality in Standerton, Lekwa Municipality, Mpumalanga, South Africa
… water supply efforts. This study evaluated the efficiency of the water supply system and assessed water quality at the Standerton Water Treatment Plant (SWTP) in Lekwa Local Municipality, Mpumalanga, South Africa. The assessment focused on operational performance, distribution effectiveness and …
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Evaluating System Performance in a Complex and Dynamic Environment
Realistically, organizational and/or system efficiency performance is dynamic, non-linear, and a function of multiple interactions in production. However, in the efficiency literature, system performance is frequently evaluated considering linear combinations of the input/output variables, without …
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Heat recovery and thermal storage : a study of the Massachusetts State Transportation Building
A study of the energy system at the Massachusetts State Transportation Building was conducted. This innovative energy system utilizes internal-source heat pumps and a water thermal storage system to provide building heating and cooling. The potential benefits of this type of system include both …
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Development of a low cost inverter controlled induction motor drive with emphasis on the effect of power factor correction
… is determined with measurements of the system efficiency and the input power factor. It is found that the decrease in the system efficiency with the PFC circuit is small, and takes place only for speeds lower than 0.72 p.u. for a fan load.
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Feasibility of using power steering pumps in small-scale solar thermal electric power systems
… feed pump in a 1-kWe organic Rankine cycle (ORC) system built by the Solar Turbine Group in Lesotho. The pumps tested included OEM plunger and piston pumps, and rotary vane-type power steering pumps purchased from a junk yard. Motor speed and torque were measured at different flow rates to …
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Production system improvement : floor area reduction and visual management
… and visual management tools to improve the efficiency of a production line in a medical device company. Lean production philosophy and common lean techniques were adopted as a guideline in this project. A new layout design was proposed to utilize less manufacturing space while maintaining or …
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Robust Model-Based Control of Nonlinear Systems for Bio-Inspired Autonomous Underwater Vehicles
… bio-inspired propulsor to increase the overall system efficiency and performance, an improvement that has deep implications in the dynamics of the system. The goal of this dissertation is to propose a generic robust control framework specific for bio-inspired autonomous underwater vehicles …
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Efficient Operation of Diesel Generator Sets in Remote Conditions
… from the engine, as well as the overall efficiency of the system. The removal of this grid connectivity requirement could result in an increase in system efficiency. At a given load, the engine operates more efficiently at lower speeds, which corresponds to an increase in the system …
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Second law analysis of a natural gas-fired steam boiler and cogeneration plant
… these operating conditions to determine the true system losses. The largest source of exergy destruction within the plant was found to be the gas turbine system under typical operating conditions. Recommendations for efficiency improvement based on the analysis are discussed. The addition of a …
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Internal Combustion Engine Performance using Aluminum as Fuel
… mixture of steam and hydrogen. In a fuel cell system, additional components are required to cool and dry the hydrogen which adds cost, weight and complexity. On the other hand, the higher temperature and steam content does not reduce the ability of the internal combustion engine to produce work …
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Unified Control for the Permanent Magnet Generator and Rectifier System
… like aircraft and vehicles, power density and efficiency is critical. Since the generator and the rectifier can be controlled simultaneously, it would be very desirable to develop a unified control. With this unified control, the boost inductors between the PMG and rectifier is eliminated, …
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Design of a PC based Data Acquistion System for a Switched Reluctance Motor
… performance evaluation of the SRM drives. System efficiency, electromagnetic torque, torque ripple, output and losses are some of the required measurements.
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Superheat control for air conditioning and refrigeration systems: Simulation and experiments
… there has been tremendous interest in increasing system efficiency to reduce the impact these systems have on global energy consumption. Efficiency improvements have been accomplished through component design, refrigerant design, and most recently control system design. The emergence of the …
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Toward high efficiency radioisotope thermophotovoltaic system by spectral control
… results of a radioisotope thermophotovoltaic system (RTPV) using a two-dimensional photonic crystal emitter and low bandgap thermophotovoltaic (TPV) cell to realize spectral control. The RTPV generator aims to use the decay heat released by plutonium-238 fuel to heat up the emitter to …
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