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Chemical separation of industrial dusts in electrostatic precipitatorsAli, Omar Feroze January 1982 (has links)
No description available.
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Control of rectifier equipment used for electrostatic precipitationMcLellan, P. G. January 1989 (has links)
No description available.
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The evaluation of dust in a swine barn and its relation to heat exchanger application.Avey, Hugh Reginald. January 1970 (has links)
No description available.
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The evaluation of dust in a swine barn and its relation to heat exchanger application.Avey, Hugh Reginald. January 1970 (has links)
No description available.
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Efficiency test of the dust collector on No.6 boiler in the V.P.I. power plantTruitt, James Linford, Riel, Richard H. 07 November 2012 (has links)
From the tests run it was observed that load variations have a pronounced effect both on size analysis and concentration of the flyash. / Master of Science
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The Membrane Vibration and the Dust Removal Efficiency of the Membrane Based Electrostatic PrecipitatorLiao, Bo 30 June 2003 (has links)
No description available.
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Mechanical Behavior of Membranes in Electrostatic PrecipitatorsRamamoorthy, Thiagarajan 03 November 2005 (has links)
No description available.
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Acaros em amostras de poeira de vestimentas de individuos atopicos e não-atopicos / Mites in dust samples on clothes of atopic and non-atopic individuaisMuniz, João Rui Oppermann, 1940- 15 February 2007 (has links)
Orientador: Celso Henrique de Oliveira / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas / Made available in DSpace on 2018-08-09T01:22:55Z (GMT). No. of bitstreams: 1
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Previous issue date: 2007 / Resumo: Ácaros são frequentemente relacionados como fontes de alérgenos para humanos, sendo encontrados principalmente em amostras de poeira de colchões, travesseiros, sofás, e tapetes. O objetivo desses estudo foi avaliar se vestimentas humanas são reservatórios de ácaros presentes na poeira domiciliar. Um total de 56 amostras de poeira de vestimentas de voluntários da cidade de Campinas foram aspiradas e analisadas através de microscopia óptica. Os resultados demonstraram que os ácaros estiveram presentes em 38 (67,9%) das vestimentas. Ácaros da poeira domiciliar (APD) representaram 92,6% do total de ácaros. Houve uma prevalência significativamente maior de APD nas amostras, quando comparados com outras famílias acarinas (p<0,0001). As principais espécies encontradas foram Dermatophagoides pteronyssinus e Euroglyphus maynei. Concluiu-se que as vestimentas também devem ser consideradas como uma importante fonte de ácaros no ambiente intradomiciliar / Abstract: Mites have been considered the most important source of allergen for humans, being found mainly on mattress, pillows, sofas, and rugs dust samples. The objective of this study was to evaluate if human clothes can also be considered another source of mites. 56 dust samples on clothes of volunteers from Campinas were vacuumed and analyzed using an optic microscopy. According to results data mites were presented on 38 (67.9%) of total analyzed dust samples. House dust mites (HDM) represented 92.6% of total mite count. There was a higher significant prevalence of HDM (p<0.0001) on samples when compared to other mite families. The most important species found were Dermatophagoides pteronyssinus and Euroglyphus maynei. In conclusion, clothes should also be considered an important indoor source of mites / Mestrado / Saude da Criança e do Adolescente / Mestre em Saude da Criança e do Adolescente
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Advanced modelling of porous screens in aerodynamic diffusers using variable resistance factorsJanse van Rensburg, Jacobus Johannes 12 1900 (has links)
Thesis (M. Tech. Mechanical engineering -- Vaal University of Technology / Strict emission legislation has forced industry in general to seriously consider the
negative impact it has on the environment, specifically concerning emissions from
burning fossil fuel into the atmosphere. In cases where emission levels exceed the
allowable limit, companies are forced to operate at lower operating conditions and
these load losses can result in a significant loss of revenue. This has forced
companies to improve their ash filtering capabilities by optimising electrostatic
precipitation systems.
One of the main factors impacting on the efficiency of such a system is the distribution
of the flow across the collection plates. The design of the inlet diffuser plays a major
role in the ultimate distribution of the flow through the precipitator. Porous screens are
positioned in the diffuser in order to distribute the flow across the total flow area with
the aim to achieve a uniform distribution of the flow.
CFD is widely used in industry to simulate the flow through precipitators in order to
optimise the flow distribution and thus increase the efficiency of the system. It was
found however that the current methods used to simulate these screens in CFD models
were not well researched and employed fixed resistance values that could not reliably
compensate for changes in the resistance coefficient due to a change in the angle of
incidence.
This study investigates advanced numerical methods for the simulation of porous
screens in applications where the angle of incidence changes continuously across the
face of the screen. New methods are introduced where the resistance of the screen is
calculated as a function of the changing angle of incidence. The methods currently
used are also investigated and compared with results from the new methods.
Extensive experimental work was required to supply empirical data for the validation of
the numerical methods that are proposed. For this reason, the first part of this study
focused on the design construction and commissioning of a low speed wind tunnel.
Results are presented and discussed for flow profiles through wide-angle diffusers at
different angles and also for a number of different screens positioned in the centre of
the diffuser.
This study also investigates the sensitivity of a CFD simulation code to factors such as
numerical discretisation schemes, turbulence models and solution relaxation
specifically for wide-angle diffusers. These factors were tested for diffusers at different
angles and included tests on open diffusers and also with screens positioned inside the
diffuser.
It was concluded that the current methods used are not adequate to capture the true
flow profiles for a range of different screen geometries. Although the proposed models
did improve on the limitations of the current methods, it was found that the applicability
of these models is still limited and that further research would be required to develop
numerical methods that are valid for a wide range of applications. / Vaal University of Technology, The National Research Foundation (NRF) and Eskom TSI
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