Tube Condensation
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Mathematical Modeling And Numerical Simulation of Dropwise Condensation on an Inclined Circular Tube
ABSTRACT: Dropwise condensation can improve heat transfer process and, consequently, leads to considerable reduction in size and weight of condensers as well as improvement in the dehumidification process in many applications, especially in civil transport aircraft. It can also be used as an efficient cooling tool for electronics and electrical systems in ai
J. Aerosp. Technol. Manag.. Publicado em: 2017-12
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2. Resfriamento de chips eletrônicos através de sistema bifásico utilizando fluído R-134A / Two-phase cooling system for electronic chips based on R-134a fluid
Neste trabalho, é calculado e construído um protótipo de um sistema bifásico fechado para resfriamento de chips eletrônicos baseado em um termosifão. O funcionamento do sistema é baseado na transferência de calor através da ebulição nucleada e da condensação em vasos, o projeto do protótipo é guiado pelos resultados obtidos nos cálculos. O pr
Publicado em: 2010
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3. Análise de termossifões que operam com mercúrio em altas temperaturas
Thermosyphons are high thermal conductivity devices that can transfer high quantities of heat when subjected to small temperature gradients. In its most simple form, a thermosyphon is a hollow evacuated metal pipe, charged by a pre-determined amount of an appropriate working fluid. It can be divided into three main sections: evaporator, where the heat is del
Publicado em: 2008
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4. NANOESTRUTURAS DE ZNO ALTAMENTE LUMINESCENTE: SYNTESIS Y CARACTERIZACIÓN / NANOESTRUTURAS DE ZNO ALTAMENTE LUMINESCENTE: SÍNTESE E CARACTERIZAÇÃO / HIGHLY LUMINESCENT ZNO NANOESTRUCTURES: SYNTHESIS AND CHARACTERIZATION
Zinc Oxide hás been synthesized by evaporation, condensation, and oxidation of methallic zinc under atmospheric pressure. Two methods of synthesis, denominated stationary and dynamic, were developed in this study. In the stationary system has the local control of temperature and a alumina tube-furnace reactor has been used. Zn was evaporated at 900-1000 C i
Publicado em: 2007
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5. Immunohistochemical studies of cyclic guanosine monophosphate and nuclear function.
In previous immunohistochemical studies, it has been found that all nuclei contain cyclic (c)GMP, which occurs in discrete aggregates and in the nucleolus. We have studied the nature of the cGMP aggregates in isolated mouse fetal nuclei using a specific immunofluorescent technique. These aggregates correspond to the areas of condensation of DNA, demonstrable
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6. Reversible Calcium-Regulated Stopcocks in Legume Sieve TubesW⃞
Sieve tubes of legumes (Fabaceae) contain characteristic P-protein crystalloids with controversial function. We studied their behavior by conventional light, electron, and confocal laser scanning microscopy. In situ, crystalloids are able to undergo rapid (<1 sec) and reversible conversions from the condensed resting state into a dispersed state, in which th
American Society of Plant Physiologists.
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7. An investigation by 1H NMR spectroscopy into the factors determining the beta:alpha ratio of the product in 2'-deoxynucleoside synthesis.
By following the course of the reaction between a suitably-protected base and a chlorosugar in an NMR tube at 250 MHz, it has been shown that the products are consistent with those expected from an SN2 mechanism with inversion of configuration at the anomeric carbon of chlorosugar. In order to achieve high yields of beta-2'-deoxynucleoside, the crystalline a
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8. The Significance of Microspore Division and Division Symmetry for Vegetative Cell-Specific Transcription and Generative Cell Differentiation.
The significance of the onset and symmetry of pollen mitosis I (PMI) for the subsequent differentiation of the vegetative and generative cells was investigated by the in vitro maturation of isolated microspores of transgenic tobacco. Free uninucleate microspores of transgenic plants harboring the vegetative cell (VC)-specific late anther tomato lat52 promote