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.
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Showing 1 to 20 of 1591 for “"Operating Conditions"”.
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Electrochemical machining: prediction of operating parameters including extreme operating conditions.
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1971.
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Investigation of operating conditions in stirred ball milling of coal
… coal. Using a five-inch batch mill, the optimum operating conditions have been determined in terms of media size, feed size, media type, stirring speed and percent solids. The rates of breakage determined with monosized feeds are compared on the basis of specific energy consumption. It has been …
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Gas diffusion electrodes and operating conditions for electrochemical energy storage applications
The world today faces two contradictory challenges: climate change and energy security. Interestingly, both challenges can be potentially addressed by targeting atmospheric CO2. The global demand for energy has increased due to population growth and most of this demand is met by the dwindling …
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Power Quality Analysis of a Three-Phase Cycloconverter Under Variable Operating Conditions
… is to observe the correlations between variable operating conditions and power quality parameters for a three-phase to single-phase cycloconverter. The cycloconverter is examined in its most straightforward form without additional output filters or elaborate control methods. Variable operating …
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Optimizing model predictive control of processes for wide ranges of operating conditions
This thesis develops robustly feasible model predictive controllers (RFMPC) for nonlinear network systems and soft switching mechanism between RFMPCs is proposed to achieve softly switched RFMPC (SSRFMPC). The safety zones based technique is utilized to design RFMPC by two different mechanisms i.e. …
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Effect of operating conditions on product quality in continuous eutectic freeze crystallization
… are the net effect of the crystallizer operating conditions such as the level of supersaturation, residence time and magma density. In order to control the mentioned product characteristics, the mechanistic interaction of crystallizer operating conditions and product morphology and size …
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A model-based approach to regulating electricity distribution under new operating conditions
… than separating the regulation of capital and operating expenditure are selected as proposals.
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Effects of engine operating conditions on catalyst light-off and combustion variability
Greenhouse gas targets for passenger car internal combustion engines as well as increasingly stringent emissions legislation around the globe require innovative development approaches for future engine generations. At the same time, trade-offs can limit important design parameters necessitating …
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Measuring and evaluating log truck performance in a variety of operating conditions
… data logger capable of withstanding the harsh operating environment found in forest harvesting and transport equipment. The first study investigated the normal operating pattern for a truck in a logging contractors flect. The truck was found to be highly utilized and to incur considerable …
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Impact of operating conditions on thermal hydrolysis pre-treated digestion return liquor
… employing THP pretreatment. The impact of operating conditions of the THP on dissolved organic nitrogen (DON) and UV absorbance in return liquor was investigated. Operating conditions studied were (1) operating temperature (2) solids retention time (SRT) in the anaerobic digester (3) THP …
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The selection of operating conditions and the design of tooling for electrochemical machining
… This thesis is concerned with the selection of operating conditions and the design of tooling for electrochemical machining. An introduction to this aspect of the process is followed by a review of current literature on the subject. A model is adopted for the prediction of the one-dimensional …
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Enhanced removal of emerging contaminants during managed aquifer recharge using optimized operating conditions
… and determine how a sequence of optimal conditions can improve CEC removal in full-scale MAR. These objectives were achieved through a combination of bench-, laboratory-, and field-scale experiments. BDOC is both a driver of microbial diversity and redox state, and therefore is an …
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Performance Assessment and Management of Large Wind Farms under Abnormal Grid Operating Conditions
… understanding of wind farms during abnormal grid operating conditions to help establish improved protection and control strategies. Keywords: Demand Side Management, Doubly-Fed Induction Generator (DFIG), Energy Policy, Fault Current, Fault Model, Fault Ride-Through (FRT), Fixed Speed Induction …
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The Effect of Operating Conditions on Gas Holdup and Mixing in Tower Fermenters
… been concerned with small diameter columns and operating conditions not applicable to those suitable for fermentation purposes. The discrepancies in the data published by different researchers also suggest the need for further investigations. The object of this research was to attempt to …
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Multiphase CFD benchmark of experimental critical heat flux data at PWR operating conditions
Critical Heat Flux (CHF) in flow boiling represents the fundamental upper limit for thermal hydraulic performance of PWR fuel. Currently, the nuclear industry relies on expensive, prototypical experiments using electrically heated, full-height rod assemblies to determine the limit of the boiling …
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Soot formation in direct injection spark ignition engines under cold-idle operating conditions
… in direct injection engines under cold-idle operating conditions. A number of engine and rapid compression machine experiments were conducted in order to understand the impacts of engine operating conditions and fuel composition on particulate matter emissions. Using these data, a conceptual …
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Dynamic Braking Control for Accurate Train Braking Distance Estimation under Different Operating Conditions
… train braking distance under different operating conditions. Accurate estimation of the braking distance will allow trains to be spaced closer together, with reasonable confidence that they will stop without causing a collision. This study develops a dynamic model of a train consist …
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A STUDY OF THE MICROORGANISMS INHABITING ROTATING BIOLOGICAL CONTACTOR BIOFILMS DURING VARIOUS OPERATING CONDITIONS
<p>The microbial ecology of rotating biological contactors (RBC) is a combination of complex interrelationships among bacteria, protozoa, and metazoa and their perceived environment. Since very little information is available on the microorganisms inhabiting the biofilms, the major objective of …
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Effects of operating conditions, compression ratio, and gasoline reformate on SI engine knock limits
A set of experiments was performed to investigate the effects of air-fuel ratio, inlet boost pressure, hydrogen rich fuel reformate, and compression ratio on engine knock behavior. For each condition the effect of spark timing on torque output was measured. Knock limited spark advance was then …
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