Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Phase Change Material enhanced with carbon-based hybrid nanoparticles
Submission Author:
Thiago da Silva André , RN
Co-Authors:
Thiago da Silva André, Carlos Antonio Cabral Santos, Cleiton Rubens Formiga Barbosa Júnior
Presenter: Thiago da Silva André
doi://10.26678/ABCM.COBEM2021.COB2021-1935
Abstract
Phase change material is a sustainable energy alternative to reduce electrical energy demand One of the applications of the phase change material (PCM) is in refrigeration systems, as it absorbs latent heat from stored products when there is no supply of energy that keeps them frozen and keeps the internal temperature, inside the cold space, constant for a period. In this perspective, this research developed four PCMs based on water plus alcohol. The first is a mixture of water and glycerol, which will act by lowering the melting point of water, with a freezing temperature below zero degrees, to be applied in freezers or cold rooms. The others are PCM (water + glycerol) enhanced with carbon-based nanoparticles (NP) chitosan functionalized: multi-walled carbon nanotubes (MWCNT) and graphene oxide (GO). The amount of nanoparticles was 0.1 kg / m3 in each NePCM, with variations in the percentages of NP, 75% of MWCNT + 25% GO (NePCM-AG1), 50% of MWCNT + 50% GO (NePCM-AG2) and 100% MWCNT (NePCM-AG3), were so named. Furthermore, the thermophysical properties evaluated were density, thermal conductivity, dynamic viscosity and stability. In general, nanoparticles contributed to an increase in the thermal conductivity value, on average 1.5%.
Keywords
NePCM, thermal conductivity, cooling, latent thermal energy
