A Study for Entropy Generation of a Heat Transfer Fluid containing Multiwalled Carbon Nanotubes and Microencapsulated Phase Change Materials

Published in: Innovation in Engineering, Technology and Education for Competitiveness and Prosperity: Proceedings of the 11th Latin American and Caribbean Conference for Engineering and Technology
Date of Conference: August 14-16, 2013
Location of Conference: Cancun, Mexico
Authors: Frank Porras
Pablo Guevara
Guillermo Soriano
Refereed Paper: #321

Abstract:

In English:
Present research work provides an entropy generation analysis due to flow and heat transfer in a slurry containing Microencapsulated Phase Change Material (MPCM) and multiwalled carbon nanotube based nanofluid. The arrengement consider for the study was slurry flowing through a channel under laminar and turbulent regime with constant heat flux conditions. The effects of specific heat, thermal conductivity and viscosity were considered using proposed theoretical and experimental models. Results comparing entropy generation of the slurry compared with the base fluid are presented. The effects of microencapsulated phase change material and multiwalled carbon nanotubes mass fractions are studied and an optimal proportion with minimal entropy generation is presented.


In Spanish:
El presente trabajo de investigacion presentas un analisis de generacion de entropia causado por flujo y transferencia de calor de una lechada conteniendo material de cambio de fase microencapsulado (MPCM) y nanofluidos de nanotubos de carbono multipared. El sistema considerado para el estudio es la lechada fluyendo a través de un canal bajo flujo laminar y turbulento bajo condiciones flujo de calor constante. Los efectos de calor especifico, conductividad térmica y viscosidad fueron consideradas usando modelos experimentales y teoricos. Resultados comparando la generación de entropía de la lechada con el fluido base son presentados. Los efectos de la fracción de masa del material de cambio de fase microencapsulado (MPCM) y de los nanotubos de carbono multipared son estudiados, y una proporción optima con generación mínima de entropía es presentada.