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 45 for “"recovery efficiency"”.
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Structure Segmentation and Transfer Faults in the Marcellus Shale, Clearfield County, Pennsylvania: Implications for Gas Recovery Efficiency and Risk Assessment Using 3D Seismic Attribute Analysis
… away from the wellbore, causing a decreased efficiency in gas recovery, as has been the case for the Clearfield County, Pennsylvania study area. Estimating appropriate distances away from faults and fractures, which may limit hydrocarbon recovery, is essential to reducing the risk of …
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A Comparative Microbial Composition Assessment of Stormwater, Urban Runoff and Wastewater
… facility. We compared the overall FIB recovery efficiency by two varieties of USEPA-approved, culture-based laboratory methods in each type of water. The two types of methods were the IDEXX Quanti-Tray technique and the USEPA membrane filtration methods 1603 and 1600. All results showed …
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Removal of silver and mercury from COD waste solutions
… were examined for the selective separation and recovery of silver and mercury from COD waste solutions. Batch equilibrium studies were conducted to determine ion exchange selectivity of several commercial and regenerated resins. Resin capacity and metal ion recovery efficiency were evaluated in …
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Simultaneous Multiple Plane to Plane Waterflooding in Fractured Tight Reservoirs
… proposed pattern. The study showed that pattern recovery factors increased for reduced secondary fracture porosity, and decreasing the hydraulic fracture spacing accelerated recovery. Further, rapid water breakthrough through in any individual displacement could short-circuit the displacement, …
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Vortex control of two-phase refrigerant flow in nozzles and its application in ejector vapor compression cycles
… flow control with less sacrifice of nozzle efficiency, which is important for two-phase ejector cooling cycle performance. It is also less vulnerable to clogging since the flow control is achieved without changing the flow area. Different nozzle flows with initially subcooled R134a were …
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Modelling the impact of geochemical reactions on oil recovery and scale management in chemical Enhanced Oil Recovery (cEOR) flooding processes
… chemical and geochemical interactions on oil recovery efficiency and inorganic scale management during chemical Enhanced Oil Recovery (cEOR) flooding processes. These reactions are studied for polymer, surfactant and Surfactant-Polymer (SP), Alkaline-Surfactant (AS) and …
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Simulating Optimal Part Yield from No. 3A Common Lumber
… aspects of the rough mill from processing to recovery efficiency. This research used the ROMI-RIP and ROMI-CROSS simulation programs to determine specific conditions that led to optimal part yield when processing No. 3A Common, 4/4-thickness, kiln-dried, red oak lumber in rip-first and …
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A streamline model application for the waterflood performance of NZ-OF-HRL carbonate reservoir
… to be negligible, the possibilities of secondary recovery by the injection of water is analyzed in this study. The reservoir performance history was simulated using the streamline model. Three prediction cases were made for different water injection schemes. Each of these predictions were studied …
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Impacts of enhanced efficiency nitrogen fertilizers on yield-scaled N2O emissions in Illinois maize
… was conducted to assess the ability of enhanced efficiency nitrogen fertilizers (EENFs) to minimize yield-scaled N2O emissions while maintaining nutrient utilization and crop productivity of maize. In addition to an unfertilized control (zero N), N source treatments applied at 202 kg ha-1 at …
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Monitoring and control of electrothermal swing adsorption based on electrical properties of the adsorbent
… power profiles on the ACFC regeneration energy efficiency, 3) develop and test a new method to control ACFC regeneration heating based only on electrical resistance measurements, 4) characterize and control cyclic ESA based only on electrical measurements, and 5) compare the ESA system to …
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Dynamic service recovery in a grid environment
… there is a need to develop an autonomic fault recovery mechanism that will effectively monitor, diagnose and recover a running service from failure. In addressing the above mentioned challenge, a dynamic service recovery model has been proposed. The model uses the replication approach to …
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The electric vehicle experiment : developing the theoretical model for 2.672
… the EVE was the motor/generator unit, though the efficiency increased as the torque increased. The gearbox and controller efficiencies were modeled as constants in the simplified model since the manufacturer's literature only quoted one value for the gearbox and since there was a lack of detailed …
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An investigation and examination of the levels and types of bacterial contamination on the surface of clean room operators' garments.
… in published research. Reported here is the recovery, enumeration and comparison of the levels of bacteria on the surface of reusable antistatic carbon filament polyester clean room garments, using the direct agar contact method, following their laundering with and without terminal gamma …
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Fibre optic pressure sensor for downhole monitoring in the oil industry
… is seen to be the key to increasing oil-recovery efficiency, currently estimated to be 35% on average for North Sea oil-wells.<br/>Fibre-optic sensors have the potential to measure many downhole parameters. However, high-temperature, high-pressure (HTHP) fluids are shown to have adverse …
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Development of an inline cleaning procedure and a concentration method for analyzing low levels of organophosphate flame retardants and plasticizers in sediment
… possible sources of OPFPs in the laboratory. The recovery efficiency of several concentration methods, including slow evaporation in a fume hood to dryness, fast evaporation to 1-2 mL using a gentle stream of nitrogen gas, and slow evaporation to 1-2 mL in the fume hood, were evaluated. Slow …
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Magnetophoretic cell clarification
… one pass through the quadrupole system. The recovery efficiency decreased with increasing flow rate, i.e. with decreasing residence time in the device. E. coli cells were able to be removed with separation efficiencies as high as 95% at much higher flow rates due to the formation of …
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Synthesis and characterisation of silica adsorption platforms for use in environmental remediation
… or HCl; with HCl being the most efficient with recovery efficiency of over 90 %.A simple, rapid, bio-inspired green silica material was then developed producing a silica material with iron nanoparticles being incorporated into the framework (Fe-GN). The efficiency of Fe-GN material for the …
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Novel insights into low salinity water flooding enhanced oil recovery in sandstone reservoirs
… incentives to search for methods to increase recovery efficiency for several decades. Water flooding is extensively applied worldwide to improve oil recovery. The recent drop in oil prices has turned the oil industry to the cheapest improved oil recovery (IOR) techniques, such as low salinity …
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Detection of enteroviruses in marine waters using RT-PCR.
… effectiveness of column purification and virus recovery efficiency. Samples were subsequently analyzed either by RT-PCR, cell culture or the integrated cell culture/PCR technique. Results from this research indicate: (i) Filterite filters are efficient (66%) for concentration of enteroviruses …
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Microbial flocculation for large scale harvesting of marine microalgae for the production of biodiesel.
… glucose or glycerine) and a 24 h mixing time, a recovery efficiency (RE) of over 90% and a concentration factor (CF) of 226 was achieved. Statistical analysis showed that both RE and CF were independent of the substrates used and that RE was positively correlated with mixing time, while CF was …
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