Power Dissipation
Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. ENERGETIC ANALYSIS OF AN ABSORPTION CHILLER USING NH3/LiNO3 AS AN ALTERNATIVE WORKING FLUID
Abstract This paper presents a thermodynamic model developed for a prototype absorption chiller using NH3/LiNO3 with 10 kW of nominal capacity. The study was undertaken using thermodynamic modeling based on the mass and energy balance, takes the overall heat transfer coefficients into consideration and uses the characteristic equation method. First, the resu
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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2. A construção social de um sistema de mobilidade inteligente: mapeando controvérsias no caso do Swisspass
Resumo A ideia prevalente de cidades inteligentes pressupõe o uso de tecnologias digitais para uma gestão supostamente mais eficiente das dinâmicas urbanas. Há uma necessidade científica de se conhecer tais processos, a partir das ciências sociais. Dentre os vários setores da gestão urbana, o de mobilidade é um dos mais sensíveis a mudanças tecnol
Cad. Metrop.. Publicado em: 15/04/2019
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3. Three-dimensional numerical simulation of flow in vertical slot fishways: validation of the model and characterization of the flow
RESUMO As escadas para peixes com ranhuras verticais permitem que ocorra a dissipação da energia do escoamento em função da forma da bacia, dos defletores, da declividade longitudinal e da largura da ranhura vertical. Estas estruturas devem apresentar padrões médios e turbulentos do escoamento compatíveis com os peixes que irão transpô-la. Tipicame
RBRH. Publicado em: 11/04/2019
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4. Analisys of hot deformation behavior of super duplex stainless steel UNS S32760 through processing maps
Abstract The need for materials with higher strength and corrosion resistance in corrosive environments, such as in the oil extraction in saline media, has led to the use of super duplex stainless steels in projects such as the Pre-sal. The manufacture of these materials involves the step of thermomechanical processing, whose performance depends on the worka
Rem: Rev. Esc. Minas. Publicado em: 2016-06
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5. Estudo de transistores de tunelamento controlados por efeito de campo. / Study of tunnel field effect transistors.
This works presents the study of tunneling field effect transistors, namely TFETs. Analyses were performed based on theoretical explanations, numerical simulations and experimental data in order to show this technology suitability as an alternative for the continuous devices scaling. The basic idea of making use of band-to-band tunneling as the main current
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/03/2012
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6. Fish passage system in an irrigation dam (Pilcomayo River basin ): when engineering designs do not match ecohydraulic criteria
The Route 28 Dam has the potential to block fish movements from La Estrella marsh to the Pilcomayo River. In addition, the many fish that concentrate immediately downstream of the dam may suffer high mortality when they are stranded during low water periods. The goals of this study are to determine if fish are able to pass the spillway and to assess if the d
Neotrop. ichthyol.. Publicado em: 2012-10
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7. The use of an axisymmetric formulation of the Finite Volume Method for the thermal analysis of the retina and ocular tissues following implantation of retinal prosthesis
This study analyzes the heat transfer in human eyes following implantation of retinal prostheses using an axisymmetric formulation of the Finite Volume Method. The model used consisted of a vertex centered unstructured grid finite volume method in an edge-based data structure and an explicit time integration. The results of the finite volume thermal analysis
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-09
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8. Desarrollo metodológico a partir de mosaicos urbanos para evaluar la eficiencia energética y el aprovechamiento de la energía solar en el marco de la sustentabilidad urbana
In Argentina, the production and recycling of buildings have grown significantly in the last few year, especially in the residential building market. Therefore, it is essential to develop analytical tools to help understand and monitor the processes involved in the phenomenon of urbanization and to quantify its energy and environmental consequences. This stu
Ambiente Construído. Publicado em: 2011-06
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9. A novel voltage-mode CMOS quaternary logic design
This brief presents a novel kind of voltage-mode CMOS design that uses multiple threshold voltage transistors and three power supply lines to implement quaternary logic gates, showing lower power dissipation and using less area than the present voltage-mode quaternary circuits. Inverter, NMIN, and NMAX gates are simulated with the Spice tool using TSMC 0.18-
Publicado em: 2011
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10. Development of an optical fluorescence imaging system for medical use / Desenvolvimento de um sistema por imagem de fluorescência óptica para uso médico-odontológico
Optical fluorescence has been applied to several medical areas, as to monitor drug degradation and cancer detection, due to its high sensitivity, simplicity and fast response. Non-invasive and non-destructive assessment of tissues using this technique is very attractive for clinical diagnosis. Hence, the aim of was the development of an optical fluorescence
Publicado em: 2010
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11. Estudo comparativo entre teoria construtal e entrânsia para casos de resfriamento de fontes de calor em cavidade / Comparactive study between constructal theory end the entransy treory for the cooling cases of heat sources in a cavity
In the present work the cooling was treated by natural convection of one, three and five sources localized in a vertical wall of a rectangular cavity. One has approximated numerically the temperature field in the stationary state at different positions for each case. The conductivity and the dissipation of entransy were evaluated in all these cases and their
Publicado em: 2009
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12. Modeling of dynamic rotors with flexible bearings due to the use of viscoelastic materials
Nowadays rotating machines produce or absorb large amounts of power in relatively small physical packages. The fact that those machines work with large density of energy and flows is associated to the high speeds of rotation of the axis, implying high inertia loads, shaft deformations, vibrations and dynamic instabilities. Viscoelastic materials are broadly
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-03