Flow-boiling heat transfer of R-134a-based nanofluids in a horizontal tube

Kristen Henderson; Young Gil Park; Liping Liu; Anthony M. Jacobi

doi:10.1016/j.ijheatmasstransfer.2009.11.026

Flow-boiling heat transfer of R-134a-based nanofluids in a horizontal tube

Kristen Henderson, Young Gil Park, Liping Liu, Anthony M. Jacobi

Mechanical Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The influence of nanoparticles on the flow-boiling of R-134a and R-134a/polyolester mixtures is quantified for flows of low vapor quality (x < 20%) over a range of mass fluxes (100 < G < 400 kg/m² s). With direct dispersion of SiO₂ nanoparticles in R-134a, the heat transfer coefficient decreases (as much as 55%) in comparison to pure R-134a. This degradation is, in part, due to difficulties in obtaining a stable dispersion. However, excellent dispersion is achieved for a mixture of R-134a and polyolester oil with CuO nanoparticles, and the heat transfer coefficient increases more than 100% over baseline R-134a/polyolester results. In the range of these experiments, nanoparticles have an insignificant effect on the flow pressure drop with the R-134a/POE/CuO nanofluid.

Original language	English (US)
Pages (from-to)	944-951
Number of pages	8
Journal	International Journal of Heat and Mass Transfer
Volume	53
Issue number	5-6
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2009.11.026
State	Published - Feb 2010

Keywords

Dispersion
Flow-boiling
Halocarbon
Nanofluid
Nanotechnology

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering
Fluid Flow and Transfer Processes

Online availability

10.1016/j.ijheatmasstransfer.2009.11.026

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title = "Flow-boiling heat transfer of R-134a-based nanofluids in a horizontal tube",

abstract = "The influence of nanoparticles on the flow-boiling of R-134a and R-134a/polyolester mixtures is quantified for flows of low vapor quality (x < 20%) over a range of mass fluxes (100 < G < 400 kg/m2 s). With direct dispersion of SiO2 nanoparticles in R-134a, the heat transfer coefficient decreases (as much as 55%) in comparison to pure R-134a. This degradation is, in part, due to difficulties in obtaining a stable dispersion. However, excellent dispersion is achieved for a mixture of R-134a and polyolester oil with CuO nanoparticles, and the heat transfer coefficient increases more than 100% over baseline R-134a/polyolester results. In the range of these experiments, nanoparticles have an insignificant effect on the flow pressure drop with the R-134a/POE/CuO nanofluid.",

keywords = "Dispersion, Flow-boiling, Halocarbon, Nanofluid, Nanotechnology",

author = "Kristen Henderson and Park, {Young Gil} and Liping Liu and Jacobi, {Anthony M.}",

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AU - Henderson, Kristen

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AU - Liu, Liping

AU - Jacobi, Anthony M.

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N2 - The influence of nanoparticles on the flow-boiling of R-134a and R-134a/polyolester mixtures is quantified for flows of low vapor quality (x < 20%) over a range of mass fluxes (100 < G < 400 kg/m2 s). With direct dispersion of SiO2 nanoparticles in R-134a, the heat transfer coefficient decreases (as much as 55%) in comparison to pure R-134a. This degradation is, in part, due to difficulties in obtaining a stable dispersion. However, excellent dispersion is achieved for a mixture of R-134a and polyolester oil with CuO nanoparticles, and the heat transfer coefficient increases more than 100% over baseline R-134a/polyolester results. In the range of these experiments, nanoparticles have an insignificant effect on the flow pressure drop with the R-134a/POE/CuO nanofluid.

AB - The influence of nanoparticles on the flow-boiling of R-134a and R-134a/polyolester mixtures is quantified for flows of low vapor quality (x < 20%) over a range of mass fluxes (100 < G < 400 kg/m2 s). With direct dispersion of SiO2 nanoparticles in R-134a, the heat transfer coefficient decreases (as much as 55%) in comparison to pure R-134a. This degradation is, in part, due to difficulties in obtaining a stable dispersion. However, excellent dispersion is achieved for a mixture of R-134a and polyolester oil with CuO nanoparticles, and the heat transfer coefficient increases more than 100% over baseline R-134a/polyolester results. In the range of these experiments, nanoparticles have an insignificant effect on the flow pressure drop with the R-134a/POE/CuO nanofluid.

KW - Dispersion

KW - Flow-boiling

KW - Halocarbon

KW - Nanofluid

KW - Nanotechnology

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Flow-boiling heat transfer of R-134a-based nanofluids in a horizontal tube

Abstract

Keywords

ASJC Scopus subject areas

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