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

AUTOR(ES)

EDWIN RONALD VALDERRAMA CAMPOS

DATA DE PUBLICAÇÃO

2009

RESUMO

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, metallic or non-metallic, nanofluids have been considered as potential substitutes for conventional heat transfer fluids. Mathematical models were developed for steady-state operation, for the evaluation of thermal and hydraulic behavior of the cooling system, and for transient regime, for the assessment of the engine start-up process. The EES software was employed for the simulation. The following components of the cooling system were considered: radiator, engine cooling jackets, thermostat and coolant pump. Lumped parameter analysis and the effectiveness- NTU method were used for the single-phase system simulation. Different types of nanofluids, with variation on the volume fraction, were considered in this study.

ASSUNTO(S)

engine cooling internal combustion engine motor de combustao interna arrefecimento do motor nanofluids nanofluidos

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