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Journal of Mechanical Science and Technology

, Volume 32, Issue 9, pp 4535–4543 | Cite as

Tube-side heat transfer and friction characteristics of titanium corrugated tubes used for steam condensers

  • Nae-Hyun Kim
  • Min-Geon Go
Article

Abstract

Usage of enhanced tubes in electric utility steam condensers have many advantages including smaller condenser size, additional electricity generation by lowered condenser back pressure, etc. In the present study, titanium corrugated tubes were tested for application to electric utility steam condensers. The tubes have relatively small corrugation heights and large corrugation pitches. In addition, the lowest helix angle is 18o, which is much lower than those of existing studies. The friction factor increased as corrugation pitch decreased and corrugation height increased. The penalty factor ranged from 1.09 to 1.89. The heat transfer coefficients showed similar trend with that of the friction factor. The enhancement factor ranged from 1.05 to 1.46. Exiting correlations did not adequately predict the present friction factors and heat transfer coefficients. The reason was attributed to the geometric difference of the present corrugated tubes (large p/e and small e/Di). New correlations were developed, which predicted the present data within ±20 %.

Keywords

Corrugated tube Steam condenser Titanium Heat transfer coefficient Friction factor 

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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Mechanical System EngineeringIncheon National UniversityIncheonKorea

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