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What dominates heat transfer performance of a double-pipe heat exchanger

Zheng, Dan ; Hu, Zhenwei ; Tian, Liting ; Wang, Jin LU and Sundén, Bengt LU (2021) In Open Physics 19(1). p.863-866
Abstract

ZnO-water nanofluid in an inner pipe was experimentally investigated to improve the thermal efficiency of double-pipe heat exchangers. In this work, a 57.6% increase in the Nusselt number was obtained at Re = 14,340 when the ZnO-water nanofluid flowed through a helically corrugated tube. It was found that helical corrugation played a more important role in heat transfer enhancement than thermophysical properties of the nanofluid at the Reynolds number below 10,221. In addition, with the increase of the Reynolds number, the advantages of nanofluids in thermal performance become obvious, and Nusselt numbers increase by 28.5 and 30.6% with the effects of helical corrugation and ZnO-nanofluid, respectively, at Re = 14,349.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
double-pipe heat exchanger, nanofluid, Nusselt number, structure optimization, thermal performance
in
Open Physics
volume
19
issue
1
pages
4 pages
publisher
De Gruyter
external identifiers
  • scopus:85123292210
ISSN
2391-5471
DOI
10.1515/phys-2021-0101
language
English
LU publication?
yes
id
49f680c5-eaf3-403b-a62b-3c1df5214d14
date added to LUP
2022-03-23 13:44:53
date last changed
2023-10-18 12:07:51
@article{49f680c5-eaf3-403b-a62b-3c1df5214d14,
  abstract     = {{<p>ZnO-water nanofluid in an inner pipe was experimentally investigated to improve the thermal efficiency of double-pipe heat exchangers. In this work, a 57.6% increase in the Nusselt number was obtained at Re = 14,340 when the ZnO-water nanofluid flowed through a helically corrugated tube. It was found that helical corrugation played a more important role in heat transfer enhancement than thermophysical properties of the nanofluid at the Reynolds number below 10,221. In addition, with the increase of the Reynolds number, the advantages of nanofluids in thermal performance become obvious, and Nusselt numbers increase by 28.5 and 30.6% with the effects of helical corrugation and ZnO-nanofluid, respectively, at Re = 14,349. </p>}},
  author       = {{Zheng, Dan and Hu, Zhenwei and Tian, Liting and Wang, Jin and Sundén, Bengt}},
  issn         = {{2391-5471}},
  keywords     = {{double-pipe heat exchanger; nanofluid; Nusselt number; structure optimization; thermal performance}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{1}},
  pages        = {{863--866}},
  publisher    = {{De Gruyter}},
  series       = {{Open Physics}},
  title        = {{What dominates heat transfer performance of a double-pipe heat exchanger}},
  url          = {{http://dx.doi.org/10.1515/phys-2021-0101}},
  doi          = {{10.1515/phys-2021-0101}},
  volume       = {{19}},
  year         = {{2021}},
}