Performance evaluation of a double-pipe heat exchanger fitted with self-rotating twisted tapes

Cited 18 time in webofscience Cited 0 time in scopus
  • Hit : 43
  • Download : 0
This study presents heat transfer and frication factor characteristics of heat exchanger tube with self-rotating twisted tapes (SRTTs). A comparison of SRTTs and stationary twisted tapes (STTs) as well as an examination of the effects of SRTTs with different twist ratios (Y = 2.2, 3, 4, and 6) on the thermal characteristics were experimentally investigated under turbulence flows (12000 < Re < 45000). The experimental results showed that SRTTs under rotating conditions could enhance the thermal performance of heat exchanger as compared with STTs. The twist ratios were found to have less effect on the initial stages of the rotating behavior, and the SRTTs with lower twisted ratios rotated faster under the same operating conditions. In addition, it was observed that the Nusselt number, pressure drop, and thermal performance factor increased with decreasing twist ratios. The maximum thermal performance factors of 1.03, 0.9444, 0.924, and 0.898 could be achieved at the start of rotating behavior for Y = 2.2, 3, 4, and 6, respectively. Finally, some correlations of the Nusselt number and frication factor were established within 10% deviation of the experimental data.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2019-07
Language
English
Article Type
Article
Citation

APPLIED THERMAL ENGINEERING, v.158

ISSN
1359-4311
DOI
10.1016/j.applthermaleng.2019.113770
URI
http://hdl.handle.net/10203/287585
Appears in Collection
GCT-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 18 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0