Heat Transference
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Impact of exposure to cold on layer production
Infrared thermographic images were used to evaluate the effect of the exposure of layers to cold. In this trial, 540 Isa Brown® layers with an average age of 69 weeks were housed in a conventional layer house typically used in Brazil during a period of cold environmental temperatures. Environmental and heat-transference data were recorded between July 13-16
Rev. Bras. Cienc. Avic.. Publicado em: 2012-09
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2. Adsorción física sobre sólidos: aspectos termodinámicos
A thermodynamic formalism based on the Gibbs Dividing Surface (GDS) for the description of a solid-fluid interface is presented, so that the adsorption layer is understand as a phase and the adsorption process as the transference of components between a 3-dimensional phase and a 2-dimensional one. Using a state equation derived from the Henry's Law, we shall
Química Nova. Publicado em: 2009
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3. Numerical and experimental study of solidification around the cylinder with and without the use of turbulence promoter / Estudo numerico e experimental da solidificação em torno de cilindro com e sem o uso de promotor de turbulencia
The process of solidification of a material of change of phase in a region annular around of a cylinder cooled by fluid passing in its interior is studied numerical and experimentally, objectifying applications in systems of storage of latent heat. The boundary immobilization technique is used for solving for phase-change problem. The coordinate transformati
Publicado em: 2009
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4. Study of hydrodynamics and heat transference from liquid whole egg through plate with three formats chevron / Estudo da hidrodinamica e transferencia de calor do ovo integral liquido atraves de placas com tres formatos chevron
At this work are showed the heat transference and hydrodynamics of liquid egg flow between ducts with corrugated walls, simulating plate heat exchangers. The contour conditions admitted was the constant temperature in the walls during the fluid heating. The whole egg rheology was experimentally determinated in a extend temperature range (289 ? 335K). The egg
Publicado em: 2008
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5. Construction and termic evaluation of a solar cooker of the type box / Construção e avaliação térmica de um fogão solar tipo caixa
The present work presents a contribution in the study of modelings of transference of heat for foods submitted to the experimental tests in the considered solar oven, where the best modeling for the beefburger of chicken in study was evaluated, comparing the results, considering this food as a half-infinite(1er object considered model) and,after that, consid
Publicado em: 2007
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6. Effectiveness of the steam sterilization of assembled versus disassembled laparoscopic instruments: an experimental study / Eficácia da esterilização a vapor de instrumental laparoscópico montado versus desmontado: um estudo experimental
A vídeo-laparoscopia é uma inovação tecnológica que trouxe indiscutíveis vantagens e também novos desafios, incluindo nestes, as diretrizes para o reprocessamento adequado dos instrumentais e seus acessórios. A autoclavação dos instrumentais laparoscópicos desmontados é mais segura, uma vez que a condução térmica é facilitada. No entanto, sã
Publicado em: 2007
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7. Modelo computacional bidimensional para escoamentos gasosos com transferência de calor em um reator tipo CVD / Computational model 2D for gaseous flow with heat transfer for a reactor type CVD
In this work was made the elaboration of an prototype for the computational numerical simulation of the gaseous ow, with transfer heat, applied to the reactor type CVD, existing in the Laboratorio Associado de Sensores e Materiais (LAS) of the Instituto Nacional de Pesquisas Espaciais (INPE). Initially, we intention was to dene which the best type of mesh to
Publicado em: 2005
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8. Um estudo das propriedades mecÃnicas do concreto submetido a elevadas temperaturas para dar suporte ao gerenciamento dos riscos de incÃndios em edificaÃÃes
The stability of a building and consequently the safety of its occupants, in a fire situation are directly on to the structure performance mechanical properties of the concrete when submitted high thermal loads. When a concrete structure is submitted to the action of a fire occurs a process of heat transference, for radiation and convection, in the surface o
Publicado em: 2005
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9. AvaliaÃÃo CinÃtica da Taxa de ReaÃÃo de DegradaÃÃo do Ãcido DicloroacÃtico via tecnologia de oxidaÃÃo avanÃada OzÃnio/UV: um estudo cinÃtico
With the current level of industrial activity the quantity of pollutants being rejected into the aquatic environment are constantly increasing. The removal of these products through conventional processes such adsorption, filtration, incineration or biological treatment is not always efficacious, since these methods are based on the simple transference of th
Publicado em: 2003
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10. Modelagem e simulação do efeito de parede na transmissão de calor em um forno rotativo utilizado na produção de gesso beta
The rotating kiln used for plaster attainment beta (CaSO 4 . O,5H 20), from the calcination of the crude gypsum ore (CaSO 4 . 2H 20), present as main advantages in relation to the toa much types the production of a plaster more uniform, better thermal efficiency and easiness of automation. However, these ovens had had origin in adaptations of the kilns of ma
Publicado em: 2001
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11. Modelagem do aquecimento de fluidos com escoamento em tubos
This study considers the modeling of laminar and turbulent flows with conjugated transference of heat in tubes of cylindrical section. Instead of using the convetional finite element or finite volume methods, this formulation applies a different technique discretizing the flow in the radial direction using a 4th order finite differences method. Using this te
Publicado em: 2000
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12. Complexos a - diiminicos de platina (II)
New complexes bis-chloro, tetrachloro and dicarboxylate (a - diiminic) platinum (II) were synthesized. The neutral ligands were the a-diiminic heterocyclic derivatives of phenantroline, 2,2 -bipyridine, tryazine and pyrazine: 2,3-bis(2-pyridil)pyrazine (DPP); 2,2 ,4 ,2",6",2" - quaterpyridine (QTPY): 2,2 - bipyridine-ketone (BPYKE); 4,4 -diphenyl-2.2 -bipyri
Publicado em: 1994