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 12 of 12 for “"liquid distribution"”.
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On-line liquid distribution chromatographic/spectrofluorometric determination of PAH distribution in coal-derived products
On-line HPLC/Spectrofluorometric techniques have been applied to the determination of polycyclic aromatic hydrocarbons (PAHs) in coal-derived products. The PAHs were isolated by preparative silica gel columns with a hexane mobile phase, and fractionated into five samples based on the number of …
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Effect of Local Bed Hydrodynamics on the Distribution of Liquid in a Fluidized Bed
In an industrial Fluid CokerTM, liquid bitumen is injected into a bed of hot coke particles through spray nozzles, grouped in several banks at different vertical positions. The main objective of this thesis is to determine whether significant improvements in liquid-solid contact could be achieved …
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Fundamental studies of heap leaching hydrology using magnetic resonance imaging
… allow for the novel non-invasive imaging of the liquid hold-up in representative laboratory-scale heap leaching systems. The ferro- and paramagnetic species in the ore were found to cause significant distortions in frequency encoded MRI acquisitions. These distortions were mitigated through the …
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Hydraulic Fracturing and Flow-back Simulation in Unconventional Tight Reservoirs
… firstly we examine different fracture geometry distributions and further discuss their effects on well productions. Then reservoir simulation coupled with rock geomechanics is employed to perform dynamic hydraulic fracturing for predicting hydraulic fracture dimensions and simulating fracturing …
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Performance measurement and visualization on the refrigerant distribution in the vertical manifold of the microchannel tube heat exchanger
This project studies the liquid refrigerant distribution of an intermediate vertical manifold in a multi-pass evaporator. A new test rig is designed and built to circulate R410A through the vertical microchannel manifold. Refrigerant is circulated into the manifold through the lower set of parallel …
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Investigation of local velocities and phase holdups, and flow regimes and maldistribution identification in a trickle bed reactor
… are packed beds of catalyst on which gas and liquid reactants flow concurrently downward. In this work, the experimental work was carried out in 0.14 m diameter Plexiglas column using air-water system flowing over a packed bed of 3 mm glass bead particles. The local liquid and gas velocities, …
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Velocity distributions in a plate heat exchanger channel
… Anemometer technique to measure the velocity distribution in a commercial plate heat exchanger is described. Detailed velocity profiles are presented and a preliminary investigation is reported on flow behaviour through a single cell in the channel matrix. The objective of the study was to …
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Comparison Study of Liquid CO2 and Water as a Fracturing Fluid for Improved Gas Production in Tight Reservoirs
… fracture dimensions and simulating fracturing liquid distribution. Models with slickwater, hybrid slickwater and pure CO2 models were created in order to compare effect of CO2 on fracture propagation. Results showed that using liquid CO2 as a fracturing fluid gave the longest fracture width, …
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Comparison of Heating Methods for In-Situ Oil Shale Extraction
… thermal simulator and is based on vapor-liquid distribution ratio of a component, K values to perform phase equilibrium calculation instead of using the Equation of state (EOS). Shell has applied CMG –STARS to model its in-situ upgrading project, but is yet to publish details on the input …
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Enhancing hydraulic performance of a multi-stage anaerobic digester for high solids cattle manure
… to enable the evaluation of an improved liquid distribution system. The MSAD was constructed at column scale to evaluate the impact on organic leaching potential of varying hydraulic loading rate (HLR) through the USSHR using HLRs of 20, 41, and 75 cm/day for 16-day cycles. This …
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An Analytical Model for Oscillating Heat Pipe Performance and Experimental Testing of a Novel Helix-Shaped Design
… sealed capillary channel filled with alternating liquid slugs and vapor bubbles. When a temperature difference is present, evaporation and condensation cause fluid motion, leading to passive convective heat transfer. Traditional OHP modeling approaches, ranging from experimental correlations to …