An Overview of the Coatings Used in Condenser Tubes

Document Type : Review paper

Authors

1 Department of Materials and Metallurgy, Faculty of Mechanical and Energy Engineering, Shahid Beheshti University, P. O. Box:16765-1719, Tehran, Iran

2 Department of Materials and Metallurgy, Faculty of Mechanical and Energy Engineering, Shahid Beheshti University, P. O. Box:16765-1719, Tehran, Iran.

3 Department of Nano Materials and Nano Coatings, Institute for Color Science & Technology, P. O. Box: 16765-654, Tehran, Iran.

Abstract

Condensation may occur during various industrial applications, including water collection, desalination, energy generation, and thermal management. This phenomenon affects heat transfer efficiency during energy generation and heat management processes. Film-wise and dropwise condensation were the two types of condensation based on their formation manner. Condenser tubes are one of the energy conversion systems in which the condensation phenomenon dramatically affects the system's efficiency. The high surface energy of the condenser tube results in water film formation on the tube surface, which hinders heat transfer. Therefore, the heat transfer efficiency of the condenser is reduced due to further energy loss. The film-wise condensation should be altered to dropwise ones by reducing the surface energy of the tube to eliminate this issue. Hence, different coatings are applied to increase the condenser tubes' hydrophobicity and heat transfer capacity. In this study, the importance of wettability and heat transfer mechanisms in condenser tubes was determined primarily. Afterward, different coatings used to create dropwise condensation were introduced. Eventually, the applications and attributes of the mentioned coatings based on their cost, strength, durability, and efficiency were introduced.

Keywords

Main Subjects

References

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Journal of Studies in Color World
Volume 12, Issue 2
October 2022
Pages 171-190

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History

  • Receive Date: 03 September 2022
  • Revise Date: 30 September 2022
  • Accept Date: 11 October 2022

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