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 12022 for “"gas"”.
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Gas lift optimization utilising automation gas lift valve
Gas lift is one of the most common forms of artificial lift, particularly for offshore wells. This is due to its relative downhole simplicity, flexibility, reliability, and ability in operating over a wide range of flow rates with the limited well head space. Generally, Gas lift optimization can …
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Gas-condensate flow modelling for shale gas reservoirs.
… and reshaping the landscape of the oil and gas global market. Gas-condensate reservoirs represent an important part of these resources. The key feature of these reservoirs is the condensate banking which reduces significantly the well deliverability when the condensate forms in the reservoir …
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Combustion gas generator for gas turbine exhaust systems modeling.
A combustion gas generator was constructed for the purpose of modeling shipboard gas turbine engine exhaust systems. In particular, the system was designed and validated for exhaust stack Mach numbers in the neighborhood of 0.07 and exhaust stack temperatures varying from 700 to 900°F with an …
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Acid gas removal from natural gas using ionic liquids
The growth in demand for natural gas accounted for almost half the increase in global energy consumption in 2018 and is projected to increase by more than 10% over the next five years. This is due to its abundancy, efficiency and lower carbon content compared to oil and coal. However, raw gas …
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Selective gas adsorption of gas-water mixtures in nanoscale systems and its application to gas separation
… and transport dynamics of individual water and gases in nano-devices has been investigated extensively since anomalous molecular structures near the nanoscale surface can affect the slip behavior of transport in channels and the hydrophobic interaction of apolar objects in solutions. However, …
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Interactions Between Supersonic Gas Jets and Gas-Solid Fluidized Beds
… research on the use of attrition nozzles in gas-solid fluidized beds for two applications: green sand reclamation and particle size control in fluid cokers. These two applications make use of the same attrition principles, and the main difference between them is that for green sand …
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STUDIES OF TIN OXIDE GAS SENSORS FOR GAS CHROMATOGRAPHIC DETECTION
Gas sensitive semiconductors have been known for many years and applied in static gas alarm systems for the monitoring of hazardous gases, however, their application has been limited by a lack of selectivity. In this work a semiconducting gas sensor has been configured for use as a gas …
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Computational models of natural gas markets for gas-fired generators
… retirements of coal plants, discovery of shale gas leading to low natural gas prices, and geopolitical motives to reduce dependence on foreign oil, natural gas is becoming a major fuel source for electricity around the United States. In addition, with increasingly intermittent renewable sources …
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Vented gas explosions
… constructional protection measures against gas and dust explosions.The key problem in venting is the appropriate design of the vent area necessary for an effective release of the material i.e. the pressure developed during explosion did not cause any damage to the plant protected.Current gas …
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Gas holdup in a gas-liquid-fiber semi-batch bubble column
… connected to one of three perforated plate gas distributors with open area ratios A = 0.57%, 0.99%, and 2.14% is employed to study gas holdup and flow regime in Rayon and Nylon fiber suspensions. This study determines the effect of superficial gas velocity, fiber type, fiber mass fraction, …
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Reducing critical gas flow rate for lifting liquid from gas wells
Includes bibliographical references (pages 62-63).
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Effects of Downwash when Measuring Gas Concentration with UAV-Mounted Gas Sensors
… to cause significant changes in density-based gas concentration measurements. US regulations evaluate gas concentration as a function of gas density, and accurate concentration measurements are critical for protecting health and safety, which means evaluation of actual downwash effects on …
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Electrostatic Micro Gas Pumping for Micro Gas Chromatography Systems---Fabrication and Experiments
… diaphragm actuates. As an actuation compresses gas, the outlet valve should open with the inlet valve closed so that the gas flows out. As the diaphragm releases, the outlet valve closes and the inlet valve open, and the gas flows into the chamber. The volume of the pump chamber is 2∼6mul, …
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The Effect of a Concurrent Gas Flow on Gas-Liquid Mass Transfer
Made available in DSpace on 2014-12-13T18:55:35Z (GMT). No. of bitstreams: 1 7726677.pdf: 5365937 bytes, checksum: 3c3deee3a0ebc18340971fba646c73e8 (MD5) Previous issue date: 1977
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Mixed-gas Transport in Microporous Polymer Derivatives for Energy-Efficient Gas Separations
Over the past forty years, membrane-based gas separations have emerged as a promising alternative to energy-intensive separation processes such as amine absorption and cryogenic distillation. However, a trade-off between permeability and selectivity as well as issues of decreased performance at …
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Memòria del projecte GAS
… d'un Gestor d'Administració de Sistemes (GAS). El desenvolupament d'aquest gestor tindrà ús real i vindrà a cobrir una necessitat del departament de Sistemas Informàtic de l'Hospital Americà de la Base Naval de Trencada on treball com a administradora de sistemes.
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Gas fluidization of nanoparticles
… is to perform a systematic investigation on the gas fluidization of various nanoparticle agglomerates. Firstly, the gas fluidization characteristics and regime classifications without any additional external force fields are identified using both experimental measurements and modeling. Secondly, …
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The natural gas controversy
… of the Eighty-Fourth Congress the natural gas controversy evolved into a vital national issue. Not only was the issue "hotly" contested in Congress but it was also highly controversial at the state, city and community levels. Actually the issues over natural gas regulation is one of the …
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