Lumped Parameter Systems
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. APPLICATION OF NANOFLUIDS IN SECONDARY REFRIGERATION SYSTEMS / APLICAÇÃO DE NANOFLUIDOS EM SISTEMAS SECUNDÁRIOS DE REFRIGERAÇÃO
The application of nanofluids as secondary fluids in vapor compression refrigeration systems is studied with the development of a lumped-parameter thermodynamic model. When a nanofluid is used as a heat transfer fluid, its thermal conductivity and viscosity increase, when compared with the corresponding properties of the base fluid. The irreversibilities due
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/05/2012
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2. MODELING OF THE USE OF NANOFLUIDS IN INTERNAL COMBUSTION ENGINES COOLING SYSTEMS / MODELAGEM DO USO DE NANOFLUIDOS NO SISTEMA DE ARREFECIMENTO DE MOTORES A COMBUSTÃO INTERNA
The application of nanofluids in cooling systems of internal combustion engines was studied. Nanofluids consist of nanoparticles (with dimension below 100 (u)m) suspended in traditional heat transfer fluids, such as water or ethylene glycol. Given their favourable heat transfer characteristics, because of the suspension of high thermal conductivity particles
Publicado em: 2009
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3. Surface fire spread model based on lumped parameter approach / Modelo de propagação de fogo em incêndios de superfície baseado no método nodal
This work presents a new approach for a surface re spread model applicable to wildland re modelling. The mathematical method used in the modeling is the lumped parameter approach. In this method the thermal domain is divided in a nite number of volumes, supposed isothermal and with homogeneous properties, called nodes. To each node are attributed a temperatu
Publicado em: 2007
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4. Modelo de propagação de fogo em incêndios de superfície baseado no método nodal / Surface fire spread model based on lumped parameter approach
Este trabalho propõe um modelo de propagação do fogo aplicavel a modelagem de incêndios orestais de superfcie. A radiação emitida pela frente de fogo e considerada como o principal mecanismo de transferência de calor responsavel pela propagação do fogo. As trocas de calor por condução, convecção e radiação que ocorrem no interior do leito de c
Publicado em: 2007
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5. Prediction of transients and control reactions in a transonic wind tunnel
This work describes a lumped parameter mathematical model for the prediction of transients in an aerodynamic circuit of a transonic wind tunnel. Control actions to properly handle those perturbations are also assessed. The tunnel circuit technology is up to date and incorporates a novel feature: high-enthalpy air injection to extend the tunnel’s Reynolds n
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2000