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2020 Vol.52, Issue 3 Preview Page
Heat Transfer Characteristics in Horizontal Rectangular Channel of Multi-Channel Cylinder Dryer
Lijie Qiao1†
,
Jixian Dong2‡
,
Zhuozhi Yang3
,
Sha Wang4
,
Huan Liu4
,
Bo Wang5
,
Lingbo Kong2‡
1College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021, People’s Republic of China, Lecturer.
2College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021, People’s Republic of China, Professor.
3College of Flight Technology, Civil Aviation Flight University of China, Guanghan, Sichuan Province, 618307, People’s Republic of China, Lecturer.
4College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021, People’s Republic of China, Student.
5College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021, People’s Republic of China, Senior Experimentalist.
†Corresponding author: E-Mail: qiaolijie@sust.edu.cn (Address: College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021, People’s Republic of China)
‡Co-corresponding Author: E-Mail: djx@sust.edu.cn, and lbkong@sust.edu.cn (Address: College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021, People’s Republic of China)
30 June 2020. pp. 77-89
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Abstract

The multi-channel cylinder dryer (MCD) for drying paper may be a promising solution to the energy consumption in paper drying. However, energy consumption is related to the heat transfer characteristics of the steam condensation process. The investigation of heat transfer coefficient (HTC) in horizontal rectangular channel of MCD was experimentally performed in this paper. And the changes of overall HTC, condensation HTC and HTC of cooling water side were explored under different condensing conditions. The results showed that the overall HTC increased with the increasing of the Nusselt number of cooling water, Reynolds number of cooling water and mass flow rate of cooling water. And the condensation HTC will increase with the increasing mass flow rate of cooling water and Reynolds number of cooling water, however, there is a fluctuation of the condensation HTC changing with Reynolds number of cooling water increasing. A better heat transfer performance can be achieved by the increase of steam mass flux, while excessive pressure drop can be avoided by setting a reasonable steam mass flux, 24 kg·m-2·s-1.

Keywords
Paper drying
multi-channel cylinder dryer
horizontal rectangular channel
heat transfer coefficient
condensation heat transfer coefficient
References

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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 52
  • No :3
  • Pages :77-89
  • Received Date : 2020-05-11
  • Revised Date : 2020-06-09
  • Accepted Date : 2020-06-11
  • DOI :https://doi.org/10.7584/JKTAPPI.2020.06.52.3.77
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