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 113 for “"tray"”.
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Application of penetration theory to mass transfer on a sieve tray
… and contact time for mass transfer on a sieve-tray. These values were determined by measuring the rates of absorption of carbon dioxide into aqueous solutions and forcing the parameters to give answers consistent with the rates of absorption. These values were checked by comparing the …
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Effect of tray design on the performance of a vibrating plate extraction column
Submitted in fulfillment of the requirements for the degree of Master of Engineering, Durban University of Technology, Durban, South Africa, 2015.
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Knee Balance Assessment During Cementation Is Detrimental to Initial TKA Tibial Tray Fixation
<p>Despite recent advancements in implant design and cement technique, aseptic tibial loosening remains the primary cause of revision after cemented total knee arthroplasty (TKA) [1]. While the mechanisms of tibial loosening are multifactorial, previous research has shown that third-generation …
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Design of a thermal control system for an IC test-in-tray handler
… at rates over 10,000 uph, using a 32-device test tray. Novel heat-transfer enhancing rib features have been incorporated into a new thin small-outline package (TSOP-II) handler test tray to help maximize throughput. Experimental wind tunnel tests have demonstrated about 100% faster …
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Cost analysis and comparison of tray container style storage and stackable tote style storage
… product in an automated distribution center, a tray container style shelf and a stackable tote style shelf. Tray container style shelf has lower manufacturing costs, assembly cost and time, while stackable tote style shelf had competitive edge on packaging and shipping costs, and space …
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Review of H2S abatement in geothermal plants and laboratory scale design of tray plate distillation tower
Despite having significantly lower emissions in comparison to traditional fossil fuel plants, geothermal power plant emissions can still be substantial. In particular, dissolved non-condensable gases (NCG) such as CO2 and H2S within geothermal fluids have led to increased interest in developing …
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Application of visual perception concepts to hospital menu formats in a machine-paced tray assembly process
Digitized by Kansas Correctional Industries
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Comparison of EC-Kit with Quanti-Tray[tm] : testing, verification, and drinking water quality mapping in Capiz Province, Philippines
… a laboratory standard method, the IDEXX Quanti-Tray[tm]. The EC-Kit is a simple, inexpensive field test kit that contains complementary tests for Escherichia coli and total coliform: the Colilert[tm] 10-milliliter presence/absence test and 3MTMS Petrifilm[tm] test. This work was executed by …
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Further studies on flow distribution on distillation sieve trays
… deflection baffles in conventional distillation trays as flow straightening devices, with the view of enhancing tray efficiency. The mode of operation is based on deflecting part of the liquid momentum from the centre of the tray to the segment regions in order to drive stagnating liquid at the …
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Flow patterns, performance and scale-up of distillation trays
… nature of liquid flow across industrial sieve trays operating in the spray, mixed, and the emulsified flow regimes. In order to overcome the practical difficulties of removing many samples from a commercial tray, the mass transfer process was investigated in an air water simulator column by …
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Effect of liquid flow patterns on distillation trays
The thesis describes experimental work on sieve trays in an air-water simulator, 2.44 m in diameter. The liquid flow pattern, for flowrates similar to those used in commercial scale distillation, was observed experimentally by water cooling experiments, in which the temperature of the water is …
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The use of flow control devices to improve the flow pattern and throughput of sieve trays
Compared to packings trays are more cost effective column internals because they create a large interfacial area for mass transfer by the interaction of the vapour on the liquid. The tray supports a mass of froth or spray which on most trays (including the most widely used sieve trays) is not in …
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Flow patterns on distillation trays
… the two-phase flow patterns produced on a sieve tray were carried out using an air-water simulator of 2.44 m in diameter. The flow patterns were investigated by a number of methods, direct observation using directional flow pointers; by water-cooling to simulate mass transfer; and by measurement …
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Creating a World in the Sand: A Pilot Study of Normative Data for Employing the Sand Tray as a Diagnostic Tool With Children
… out the task of creating a ‘World’ in the sand tray. A clinical group comprised of abused and neglected children was evaluated to determine how they approached the task. Both groups were videotaped and the taped sessions were viewed and evaluated by trained raters. The final scenes were …
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Flow patterns on sieve trays
… were carried out on commercial scale sieve trays where the ratio of froth depth to flow path length is typical of that found in practice. Experiments were conducted on a 2.44 m diameter air-water distillation simulator, in which flow patterns were investigated by direct observation, using …
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Determining the operation limits of two distillation columns
… flooding phenomena that occurs in the bubble-cap tray distillation column, weeping phenomena that occurs in the sieve tray distillation column, and comparison of operation between the two distillation columns. With the use of a distributed control system (DCS) and glass equipment in the pilot …
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Computer teaching-aids for an undergraduate course in distillation
… package. (1) Binary batch distillation in tray columns. (2) Binary continuous distillation in tray columns. (3) Binary continuous distillation in packed columns. (4) Multicomponent distillation in tray columns. A plotting program utilizing CALCOMP plotting software and hardware is developed …
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Flow patterns and performance of distillation trays
It is known that distillation tray efficiency depends on the liquid flow pattern, particularly for large diameter trays. Scale·up failures due to liquid channelling have occurred, and it is known that fitting flow control devices to trays sometirr.es improves tray efficiency. Several theoretical …
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