Heat Exchange Coefficient
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Modeling of the temperature field generated by the deposition of weld bead on a steel butt joint by FEM techniques and thermographic images.
The aim of this work is to predict the temperature field generated by welding a steel butt joint (API 5L X80). The prediction was modeled by finite element software Abaqus where the subroutine was developed in Fortran so that heat source motion may be included. The motion was based on the Goldak's double ellipsoid. In the model material nonlinearities were i
Mat. Res.. Publicado em: 23/02/2018
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2. Application of optimization for improvement of the efficiency of louvered-fin compact heat exchangers
Abstract A few decades ago, the product development process was just based on a trial and error procedure, and the designer's experience. The need for a new way to design and manufacture more economical and sustainable products corroborates increasingly to a new vision of how to create new products for the benefit of society. Modern numerical tools allow gre
REM, Int. Eng. J.. Publicado em: 2016-09
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3. Experimental investigation of thermal conductivity coefficient and heat exchange between fluidized bed and inclined exchange surface
The paper presents experimental research of thermal conductivity coefficients of the siliceous sand bed fluidized by air and an experimental investigation of the particle size influence on the heat transfer coefficient between fluidized bed and inclined exchange surfaces. The measurements were performed for the specific fluidization velocity and sand particl
Brazilian Journal of Chemical Engineering. Publicado em: 2009-06
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4. Avaliação de técnicas calorimétricas aplicadas ao monitoramento de processos químicos. / Calorimetric technique evaluation applied for chemical processes monitoring.
The increasing demand for the production of polymers with more tight properties has placed great emphasis on the development of accurate and robust online monitoring techniques of polymerization reactions. Unfortunately, most of the main characteristics are not measurable online from analytical methodologies currently available and, therefore, in practice, t
Publicado em: 2009
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5. Differential proteomics and physiological characterization of two clones of Coffea canephora under water deficit / Proteômica diferencial e caracterização fisiológica de dois clones de Coffea canephora sob déficit hídrico
Understanding the mechanisms by which plants respond to water stress is crucial to predict the climate change impacts on crop productivity and ecosystems. Plants have long- distance root-to-shoot signaling mechanisms that generate the orchestration of adaptive responses. Root system signaling, as well as shoot, is often considerate important in growth contro
Publicado em: 2008
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6. DETERMINAÇÃO EXPERIMENTAL DOS COEFICIENTES DE TRANSPORTE DA PASTA DE GELO EM TROCADORES DE CALOR DE PLACAS / EXPERIMENTAL DETERMINATION OF TRANSPORTATIONS COEFFICIENTS FOR ICE SLURRY IN PLATE HEAT EXCHANGERS
Ice slurry is an aqueous solution from which ice crystals are formed. These crystals possess high energy density, in the form of latent heat. Furthermore, the fact of being a slurry makes it an excellent energy carrier, for it can be easily pumped. The present work presents an experimental procedure to assess the heat transfer and the pressure loss, with pha
Publicado em: 2005
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7. Estudo termo-hidraulico em tubos com intensificadores de troca de calor / Study hidraulical-thermal in pipes with intensifiers of heat exchange
This study of change of heat appraised fundamentally in terms of coefficient of transfer of heat of the water in drainage in smooth tubes and with insert of spiral springs of circular and rectangular profile it was investigated in the present work. In that sense it was used a supported experimental mounted for such evaluation. The rehearsals were accomplishe
Publicado em: 2004
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8. Modelagem deterministica de reatores de lama cataliticos trifasicos
The principal aim of this work was the development of a software capable to represent via deterministic modelling the dynamic behaviour of three-phase slurry catalytic reactors. Intending to achieve a realistic representation of the system, detailed models are utilized. They consist of mass and heat balance equations for the catalyst particles as well as for
Publicado em: 2003
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9. Comparação de metodos de calculo termo-hidraulico para trocadores de calor casco e tubo, sem mudança de fase
A comparison of KERN, TINKER and BELL s methods is relative to the thermal-hydraulic calculation of shell and heat exchangers without phase change, emphasis being given to the discussion about the pressure loss and the heat transfer coefficient for the shell side flow. The experimental results used are from 12 tested exchangers and were obtained in the liter
Publicado em: 1984