Publication detail

Analysis of thermal efficiency of a corrugated double-tube heat exchanger with nanofluids

Zheng, D., Du, J., Wang, W., Klemeš, J.J., Wang, J., Sundén, B.

Original Title

Analysis of thermal efficiency of a corrugated double-tube heat exchanger with nanofluids

Type

journal article in Web of Science

Language

English

Original Abstract

This research investigated convective heat transfer and hydraulic resistance of smooth and corrugated double-tube heat exchangers at various flow rates from 60 L/h to 200 L/h. The inner tube with a thread structure is designed with three pitches, i.e., 4 mm, 6 mm and 8 mm. Nanofluids are used as tube-side fluids to analyze the enhancement of heat transfer on the inner tube side. Results show that the boundary layer is destroyed by the thread structure, and the heat flux is intensified at the outer tube side. For the double-tube heat exchanger, the combined enhancement technology using thread structure at the side of the outer tube and nanofluids at the side of the inner tube contributes to improvement in the overall heat transfer performance. The maximum increment in the comprehensive performance index is 59% for the case of 1.5 wt% SiC-water nanofluid with a thread pitch of 4 mm at a flow rate of 200 L/h. Finally, the distribution of local temperature difference is analysed theoretically for nanofluids with the optimum particle concentrations, which confirmed the rationality of 1.5 wt% SiC-water nanofluid with a thread pitch of 4 mm. Results reveal that the combined enhancement of using nanofluids and a thread structure has great potential in enhancing the thermal performance of double-tube heat exchangers.

Keywords

Comprehensive performance; Corrugated tube; Heat exchanger; Nanofluid; Thermal performance

Authors

Zheng, D., Du, J., Wang, W., Klemeš, J.J., Wang, J., Sundén, B.

Released

1. 10. 2022

Publisher

Elsevier Ltd

ISBN

0360-5442

Periodical

Energy

Number

256

State

United Kingdom of Great Britain and Northern Ireland

Pages from

124522

Pages to

124522

Pages count

12

URL

https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S0360544222014256

BibTex

@article{BUT178536,
  author="Jiří {Klemeš} and Jin {Wang}",
  title="Analysis of thermal efficiency of a corrugated double-tube heat exchanger with nanofluids",
  journal="Energy",
  year="2022",
  number="256",
  pages="124522--124522",
  doi="10.1016/j.energy.2022.124522",
  issn="0360-5442",
  url="https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S0360544222014256"
}