Enhancement of Turbulent Convective Heat Transfer using a Microparticle Multiphase Flow

Tao Wang, Zengliang Gao and Weiya Jin
Additional contact information
Tao Wang: Institute of Process Equipment and Control Engineering, Zhejiang University of Technology, Hangzhou 310032, China
Zengliang Gao: Institute of Process Equipment and Control Engineering, Zhejiang University of Technology, Hangzhou 310032, China
Weiya Jin: Institute of Process Equipment and Control Engineering, Zhejiang University of Technology, Hangzhou 310032, China

Energies, 2020, vol. 13, issue 5, 1-16

Abstract: The turbulent heat transfer enhancement of microfluid as a heat transfer medium in a tube was investigated. Within the Reynolds number ranging from 7000 to 23,000, heat transfer, friction loss and thermal performance characteristics of graphite, Al 2 O 3 and CuO microfluid with the particle volume fraction of 0.25%–1.0% and particle size of 5 μm have been respectively tested. The results showed that the thermal performance of microfluids was better than water. In addition, the graphite microfluid had the best turbulent convective heat transfer effect among several microfluids. To further investigate the effect of graphite particle size on thermal performance, the heat transfer characteristics of the graphite microfluid with the size of 1 μm was also tested. The results showed that the thermal performance of the particle size of 1 μm was better than that of 5 μm. Within the investigated range, the maximum value of the thermal performance of graphite microfluid was found at a 1.0% volume fraction, a Reynolds number around 7500 and a size of 1 μm. In addition, the simulation results showed that the increase of equivalent thermal conductivity of the microfluid and the turbulent kinetic energy near the tube wall, by adding the microparticles, caused the enhancement of heat transfer; therefore, the microfluid can be potentially used to enhance turbulent convective heat transfer.

Keywords: heat transfer enhancement; multiphase flow; microfluid; Eulerian–Eulerian model (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/13/5/1282/pdf (application/pdf)
https://www.mdpi.com/1996-1073/13/5/1282/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:13:y:2020:i:5:p:1282-:d:330830

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().