Thermal conductivity measurement and characterization of binary nanofluids

Jung Yeul Jung; Changhwan Cho; Wook Hyun Lee; Yong Tae Kang

doi:10.1016/j.ijheatmasstransfer.2011.01.021

Thermal conductivity measurement and characterization of binary nanofluids

Jung Yeul Jung, Changhwan Cho, Wook Hyun Lee, Yong Tae Kang

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

64 Citations (Scopus)

Abstract

Binary nanofluids, nanoparticle suspensions in binary mixture, are developed to enhance the heat and mass transfer performance of absorption refrigeration cycles. To stabilize the nanoparticles in a strong electrolyte, polymer is used as a steric stabilizer. The effective thermal conductivities of the binary nanofluids with the concentrations of nanoparticle up to 0.1 vol% are measured using the transient hot wire method. Comparing the thermal conductivity change with time, it is found that the dispersion stability of nanofluids is a dominant factor for enhancing the thermal conductivity of binary nanofluids. It is also found that the thermal conductivity of the binary nanofluids (H₂O/LiBr binary mixture with Al₂O₃ nanoparticles) increases with the particle volume concentration and enhances by 2.2% at 0.1 vol% concentration condition. Also a modified dimensionless group is proposed to find the maximum radius of nanoparticles to maintain stable nanofluids. In this study, it was estimated ∼1.3 μm.

Original language	English
Pages (from-to)	1728-1733
Number of pages	6
Journal	International Journal of Heat and Mass Transfer
Volume	54
Issue number	9-10
DOIs	https://doi.org/10.1016/j.ijheatmasstransfer.2011.01.021
Publication status	Published - 2011 Apr
Externally published	Yes

Bibliographical note

Funding Information:
This work was partially supported by the Korea Energy Management Corporation Grant under Contract Number 2008-E-CM11-P-08-3-040-2008 and by the National Research Foundation Grant (NRF) ( 2010-0029120 ) funded by Korean Government (MEST).

Keywords

Absorption system
Binary mixture
Colloidal suspension
Stabilizer
Thermal conductivity

ASJC Scopus subject areas

Condensed Matter Physics
Mechanical Engineering
Fluid Flow and Transfer Processes

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10.1016/j.ijheatmasstransfer.2011.01.021

Cite this

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title = "Thermal conductivity measurement and characterization of binary nanofluids",

abstract = "Binary nanofluids, nanoparticle suspensions in binary mixture, are developed to enhance the heat and mass transfer performance of absorption refrigeration cycles. To stabilize the nanoparticles in a strong electrolyte, polymer is used as a steric stabilizer. The effective thermal conductivities of the binary nanofluids with the concentrations of nanoparticle up to 0.1 vol% are measured using the transient hot wire method. Comparing the thermal conductivity change with time, it is found that the dispersion stability of nanofluids is a dominant factor for enhancing the thermal conductivity of binary nanofluids. It is also found that the thermal conductivity of the binary nanofluids (H2O/LiBr binary mixture with Al2O3 nanoparticles) increases with the particle volume concentration and enhances by 2.2% at 0.1 vol% concentration condition. Also a modified dimensionless group is proposed to find the maximum radius of nanoparticles to maintain stable nanofluids. In this study, it was estimated ∼1.3 μm.",

keywords = "Absorption system, Binary mixture, Colloidal suspension, Stabilizer, Thermal conductivity",

author = "Jung, {Jung Yeul} and Changhwan Cho and Lee, {Wook Hyun} and Kang, {Yong Tae}",

note = "Funding Information: This work was partially supported by the Korea Energy Management Corporation Grant under Contract Number 2008-E-CM11-P-08-3-040-2008 and by the National Research Foundation Grant (NRF) ( 2010-0029120 ) funded by Korean Government (MEST). ",

year = "2011",

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doi = "10.1016/j.ijheatmasstransfer.2011.01.021",

language = "English",

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AU - Jung, Jung Yeul

AU - Cho, Changhwan

AU - Lee, Wook Hyun

AU - Kang, Yong Tae

N1 - Funding Information: This work was partially supported by the Korea Energy Management Corporation Grant under Contract Number 2008-E-CM11-P-08-3-040-2008 and by the National Research Foundation Grant (NRF) ( 2010-0029120 ) funded by Korean Government (MEST).

PY - 2011/4

Y1 - 2011/4

N2 - Binary nanofluids, nanoparticle suspensions in binary mixture, are developed to enhance the heat and mass transfer performance of absorption refrigeration cycles. To stabilize the nanoparticles in a strong electrolyte, polymer is used as a steric stabilizer. The effective thermal conductivities of the binary nanofluids with the concentrations of nanoparticle up to 0.1 vol% are measured using the transient hot wire method. Comparing the thermal conductivity change with time, it is found that the dispersion stability of nanofluids is a dominant factor for enhancing the thermal conductivity of binary nanofluids. It is also found that the thermal conductivity of the binary nanofluids (H2O/LiBr binary mixture with Al2O3 nanoparticles) increases with the particle volume concentration and enhances by 2.2% at 0.1 vol% concentration condition. Also a modified dimensionless group is proposed to find the maximum radius of nanoparticles to maintain stable nanofluids. In this study, it was estimated ∼1.3 μm.

AB - Binary nanofluids, nanoparticle suspensions in binary mixture, are developed to enhance the heat and mass transfer performance of absorption refrigeration cycles. To stabilize the nanoparticles in a strong electrolyte, polymer is used as a steric stabilizer. The effective thermal conductivities of the binary nanofluids with the concentrations of nanoparticle up to 0.1 vol% are measured using the transient hot wire method. Comparing the thermal conductivity change with time, it is found that the dispersion stability of nanofluids is a dominant factor for enhancing the thermal conductivity of binary nanofluids. It is also found that the thermal conductivity of the binary nanofluids (H2O/LiBr binary mixture with Al2O3 nanoparticles) increases with the particle volume concentration and enhances by 2.2% at 0.1 vol% concentration condition. Also a modified dimensionless group is proposed to find the maximum radius of nanoparticles to maintain stable nanofluids. In this study, it was estimated ∼1.3 μm.

KW - Absorption system

KW - Binary mixture

KW - Colloidal suspension

KW - Stabilizer

KW - Thermal conductivity

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Thermal conductivity measurement and characterization of binary nanofluids

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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