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A Study on Enhanced Tubes for Electric Utility Steam Condensers

발전소 수증기 응축기용 전열 촉진관에 대한 연구

  • Kim, Nae-Hyun (Department of Mechanical System Engineering, University of Incheon)
  • 김내현 (인천대학교 기계시스템공학과)
  • Received : 2016.04.06
  • Accepted : 2016.07.07
  • Published : 2016.07.31

Abstract

A computer program that simulates electric utility steam condensers was developed, and used to investigate the effects of enhanced tubes in steam condensers. The replacement of smooth tubes with enhanced tubes reduces the steam condensing temperature, and increases the efficiency of the electric utility. Therefore, a significant amount of power may be reserved without any modification of the utility. Three enhanced tubes, corrugated, low fin with internal ribs, and low fin with internal 3-D roughness, were considered. The results showed that there is an optimal internal roughness height. Low fin tubes with a 3-D roughness were superior to the other enhanced geometries. This was attributed to longitudinal vortices generated between the circumferential dimples. An additional 0.5 MW~1.3 MW was possible when smooth tubes were replaced with enhanced tubes in the 600 MW electric utility condenser. The additional power increased with increasing coolant temperature. More investigations on fouling, corrosion, and mechanical properties will be necessary for actual applications of enhanced tubes in electric utility condensers.

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