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 509 for “"Laboratory Scale"”.
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Implementation of a laboratory-scale microgrid
For this project, two laboratory-scale microgrids (capable of <2 kW each) were designed and physically implemented. The first developed microgrid was an electromechanical set-up with a DC motor and an AC generator. The second one a solid-state inverter-based microgrid. Labview 2016 was used to …
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Laboratory scale experiments with water surface waves
… of two series of experiments, at large and small scale, for the study of surface gravity waves. A number of measurement techniques are developed and implemented to capture space and time evolution of waves on a water surface in gravity, gravity-capillary and capillary ranges with the purpose to …
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Laboratory Scale Study of Calcium Sulfate Hydration Forms
… as well as anhydrous calcium sulfate. The lab-scale kinetics of these processes were studied using thermogravimetric analysis and sorption analysis. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to characterize the products from different processes. In addition to the …
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Laboratory-Scale Thermal Energy Grid Storage (TEGS) Prototype
Grid-scale long duration energy storage will be necessary to maintain grid reliability in the US and beyond as intermittent renewables become the dominant source of electricity generation. An appealing long duration energy storage technology is thermal energy storage due to its low energy-based …
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Gas Shale Permeability and Velocity Measurement at Laboratory Scale
… measurements; it can only be measured in the laboratory. The main goal of this thesis was to characterize the elastic properties and gas transport properties for the Barnett shale which comes from the Fort Worth basin in North Texas, of the United States. We measured density and ultrasonic …
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Laboratory scale modelling of a point absorber wave energy converter
… the low power levels (< 1W), associated with laboratory scale testing of Wave Energy Converts (WEC) is a notoriously difficult problem. This thesis investigates the use a magnetic particle brake to address the issue. The work describes 1:50 scale tests of a generic point absorber device, …
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Laboratory-Scale Analysis of Energy-Efficient Froth Flotation Rotor Design
… variables, particularly the rotor design, at the laboratory scale. During this study, several small-scale flotation systems were developed, including various rotor and stator designs, tank sizes, and flow conditions. Experimental techniques were also developed to identify operational performance …
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Computational Fluid Dynamics (cfd) Modeling of a Laboratory Scale Coal Gasifier
… predict the phenomena of coal gasification in a laboratory scale entrained-flow coal gasifier. The mesh for the model was developed with ICEM CFD software and the chemical and physical phenomena were modeled using the fluid flow solver ANSYS FLUENT. Mesh independence was verified. The model was …
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Non-destructive evaluation of laboratory scale hydraulic fracturing using acoustic emission
… using acoustic emission monitoring based on laboratory scale hydraulic fracturing experiments. Individual microcrack AE source characterization is performed to understand the failure mechanisms associated with small failures along pre-existing discontinuities and grain boundaries. Individual …
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Performance evaluation of a laboratory scale steep battery for corn wet milling
A laboratory-scale steep battery was designed and fabricated to serve as a research tool for simulating the continuous counter-current steeping process in corn wet milling plants. The main objective of the study was to generate baseline information on the performance of the steep battery. Steep …
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Advancing Rockfall Hazard Assessment through Data-Driven Modelling Based on Laboratory-Scale Experiments
… address the complexities of rockfall mechanics. Laboratory experiments were conducted to analyze the behavior of three distinct rock shapes-ellipsoidal, octahedral, and spherical-dropped from a pendulum arm at two specific release angles (15° and 30°) onto a horizontal concrete surface. Motion …
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Development of geophysical methods to characterize methane hydrate reservoirs on a laboratory scale
Gashydrate sind kristalline Feststoffe bestehend aus Wasser und Gasmolekülen. Sie sind stabil bei erhöhten Drücken und niedrigen Temperaturen. Natürliche Hydratvorkommen treten daher an Kontinentalhängen, in Permafrostböden und in tiefen Seen sowie Binnenmeeren auf. Bei der Hydratbildung …
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Laboratory scale aerobic bioreactor conditioning of dairy processing wastewater as feedstock for Lemna minor production
Dairy processing wastewater is a nutrient-rich resource, containing chemical oxygen demand (COD) ranging from 1,150 – 68,814 mg/L, nitrogen (N) from 14 – 1,462 mg/L and phosphorus (P) from 7.2 – 650 mg/L, depending on the product stream. This resource has potential to be utilised for cultivation of …
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Review of H2S abatement in geothermal plants and laboratory scale design of tray plate distillation tower
… equipment. Overall, it is recommended that this laboratory scale tower be built using modular design. This way, different materials can be tested at different operating conditions and the overall performance of the distillation tower can be evaluated.
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Development of a framework for scaling surfactant enhanced CO₂ flooding from laboratory scale to field implementation
… encounter occurs when moving from core-scale experiments to field-scale implementation. Results obtained from laboratory experiments serve as inputs to reservoir simulators for modeling field-scale processes and estimating surfactant requirements. Generally, core-scale permeability is …
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Sorption and Biodegradation of Organic Solutes Undergoing Transport in Laboratory-scale and Field-scale Heterogeneous Porous Media.
… biodegradation during well-controlled field and laboratory experiments. Specifically, this study investigated how residence time and scale influence the extent and rate of in-situ biodegradation of an organic solute undergoing transport. The transport of the biodegradable solute was compared to …
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LABORATORY-SCALE INVESTIGATION OF PERMEABILITY AND FLOW MODELING FOR HIGHLY STRESSED COALBED METHANE RESEROVIRS USING PULSE DECAY METHOD
… used for permeability measurement in the laboratory, is not applicable for tight rocks, higher rank coals and coals under highly stressed condition because of the difficulty in measuring steady-state gas flowrates resulting from the tight rock structure of. However, accurate estimation of …
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Application of mineralogy in the interpretation of laboratory scale acid rock drainage (ARD) prediction tests : a gold case study
The mining and beneficiation of gold generates large tonnages of waste, with up to 99% of mined gold ore discharged as waste. The waste generated contains unoxidized sulfides that when exposed to air and water react to form acid, which results in acid rock drainage (ARD). ARD is usually associated …
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Using positron emission particle tracking (PEPT) to investigate the motion of granular media in a laboratory-scale tumbling mill
… by the UCT Centre for Minerals Research (CMR) on laboratory-scale tumbling mills, and in so-doing elucidate the behaviour of charge in its different regions- and the evolution of such behaviour with mill operating parameters- and discuss the implications of these to grinding efficacy in tumbling …
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