El agua potable para el sector rural de Cumbili cantón Caluma, provincia Bolivar, uno de los factores claves para su desarrollo

Abstract

This research project presents the CFD numerical analysis in nanofluids, with the intention of increasing the heat transfer coefficient of refrigerants R600a and R290 in the boiling process when these are applied aluminum oxide nanoparticles with a 5% volume fraction equivalent. The study considered boiling process in the evaporation of refrigerant fluids R600a, R290 and nanorefrigerants R600a/Al2O3, R290/ Al2O3 at a temperature of -15 °C, considering that, fluids flow at a speed of 1.5 m/s by a heat exchanger, said exchanger is in the form of a straight tube, this heat exchanger has an inner diameter of 7.899 mm and a length of 1000 mm, it is exposed to a heat flux of 20 kW/m2. Considering that, the temperature at which the fluids enter the heat exchanger is -16 °C and they are in the liquid phase. The numerical analysis was feasible from the use of the ANSYS FLUENT 2022 Student software, in this study the Eulerian model was used for multiphase flows and the RNG k-epsilon model to obtain heat transfer results on surfaces curves. Several simulations were conducted, which are described in this paper, and they determined that under the given conditions nanorefrigerants R600a/ Al2O3, R290/ Al2O3 fail to achieve better heat transfer than refrigerants R600a and R290.