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Experimental study of the subcooled flow boiling heat transfer of magnetic nanofluid in a vertical tube under magnetic field
University of Tabriz, P.O. Box 51666-16471, Tabriz, Iran.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
University of Tabriz, P.O. Box 51666-16471, Tabriz, Iran.
University of Tabriz, P.O. Box 51666-16471, Tabriz, Iran.
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2019 (English)In: Journal of Thermal Analysis and CalorimetryArticle in journal (Refereed) Published
Abstract [en]

In this study, the subcooled boiling heat transfer of a Fe3O4/water magnetic nanofluid flowing through a vertical tube has been investigated experimentally in the presence and absence of a magnetic field. The magnetic field has been generated by quadrupole magnets. The subcooled boiling heat transfer coefficient and the boiling curves of the ferrofluid flow under the action of the magnetic field have been compared with those in the absence of magnetic field. The results showed that magnetic actuation contributes to have higher heat fluxes at the same wall superheat in comparison with heat fluxes achieved in the no magnetic field case. Therefore, the local subcooled boiling heat transfer coefficients are increased by the magnetic field. The maximum measured enhancement in local subcooled boiling heat transfer coefficient along the length of the tube by applying magnetic field is 46.58% at applied heat flux of 77,000 W m−2 and mass flux of 270 kg m−2 s−1. Furthermore, the enhancement of local heat transfer coefficient by applying magnetic field decreases as the applied heat flux in the subcooled boiling region is increased.

Place, publisher, year, edition, pages
2019.
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Environmental Engineering
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URN: urn:nbn:se:kth:diva-268289DOI: 10.1007/s10973-019-09057-zScopus ID: 2-s2.0-85076002132OAI: oai:DiVA.org:kth-268289DiVA, id: diva2:1415293
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QC 20200318

Available from: 2020-03-18 Created: 2020-03-18 Last updated: 2020-03-18Bibliographically approved

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Khodabandeh, RahmatollahGhanbarpour, Morteza

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