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Two-phase ferrofluid systems: surfactants and thermal properties of iron oxide nanofluids for condensation

Zabek, Daniel, Grzebielec, Andrzej, Cmok, Luca, Boštjančič, Patricija Hribar and Mertelj, Alenka 2019. Two-phase ferrofluid systems: surfactants and thermal properties of iron oxide nanofluids for condensation. Presented at: 14th Research & Development in Power Engineering (RDPE 2019), Warsaw, Poland, 3-6 December 2019. EDP Sciences, pp. 1-4. 10.1051/e3sconf/201913701015

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Abstract

Evaporation heat transfer with ferrofluids has the potential to improve heat and mass transfer compared to conventional two-phase systems. The ferromagnetic nanoparticles which control the rheology and heat transfer properties of the ferrofluid, must be coated with a dispersing agent, also referred to as a surfactant, to prevent particle agglomeration. This paper compares ferromagnetic iron-oxide particles coated with fatty acid, polymeric and hydrophobic surfactants after undergoing evaporation and condensation. The outcome was measured by assessing the dispersion of the ferrofluid after condensation. The fatty acid surfactants demonstrated the best dispersion after condensation proving temperature stability.

Item Type: Conference or Workshop Item (Speech)
Date Type: Published Online
Status: Published
Schools: Engineering
Subjects: Q Science > Q Science (General)
Publisher: EDP Sciences
ISSN: 2267-1242
Date of First Compliant Deposit: 14 January 2021
Date of Acceptance: 16 December 2019
Last Modified: 14 Jan 2021 16:15
URI: http://orca.cardiff.ac.uk/id/eprint/137535

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