Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
REVIEW ON THE USE OF NANOREFRIGERANTS IN HEAT EXCHANGERS
Submission Author:
Vinícius Vitor Gonçalves , MG
Co-Authors:
Vinícius Vitor Gonçalves, Flavio Augusto Sanzovo Fiorelli
Presenter: Vinícius Vitor Gonçalves
doi://10.26678/ABCM.ENCIT2020.CIT20-0695
Abstract
This paper presents a review of studies on the use of nanoparticles in suspension as the working fluids of compact mini-split heat exchangers. There are several studies indicating the feasibility of applying nanoparticles in refrigeration systems and resulting in increased efficiency. The physical properties of nano refrigerants, mainly viscosity and thermal conductivity, are fundamental parameters for analyzing heat transfer and drag coefficients when designing a climatization system. This review presents recent experimental and theoretical research on thermal conductivity and viscosity of nanofluids. Results reveal that viscosity and thermal conductivity are function of base fluid and particle’s shape, size, temperature, and concentration. Particle concentration has a positive correlation with thermal conductivity, but the effects of particle size, shape, base fluid property, and temperature are not similar. In addition, the main difficulties and future challenges are reviewed in the literature and presented at the end of this article.
Keywords
nanorefrigerants, Heat Exchangers, air-condition
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