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Enhancement of Condensation Heat Transfer Rate of the Air-Steam Mixture on a Passive Condenser System Using Annular Fins

Author

Listed:
  • Yeong-Jun Jang

    (Department of Nuclear and Energy Engineering, Jeju National University, 66 Jejudaehakno, Jeju-si, Jeju 63243, Korea)

  • Dong-Jae Choi

    (Department of Nuclear and Energy Engineering, Jeju National University, 66 Jejudaehakno, Jeju-si, Jeju 63243, Korea)

  • Sin Kim

    (School of Energy Systems Engineering, Chung-Ang University, Seoul 156-756, Korea)

  • Myung-Taek Hyun

    (Department of Mechanical Engineering, Jeju National University, 66 Jejudaehakno, Jeju-si, Jeju 63243, Korea)

  • Yeon-Gun Lee

    (Department of Nuclear and Energy Engineering, Jeju National University, 66 Jejudaehakno, Jeju-si, Jeju 63243, Korea)

Abstract

This paper presents an experimental investigation on the enhancement of the heat transfer rate of steam condensation on the external surfaces of a vertical tube with annular fins. A cylindrical condenser tube, which is 40 mm in outer diameter and 1000 mm in length, with annular disks of uniform cross-sectional area is fabricated in the manner of ensuring perfect contact between the base surface and fins. A total of 13 annular fins of 80 mm diameter were installed along the tube height in order to increase the effective heat transfer area by 85%. Through a series of condensation tests for the air-steam mixture under natural convection conditions, the heat transfer data was measured in the pressure range of between 2 and 5 bar, and the air mass fraction from 0.3 to 0.7. The rates of heat transfer of the finned tube are compared to those that are measured on a bare tube to demonstrate the enhanced performance by extended surfaces. In addition, based on the experimental results and the characteristics of steam condensation, the applicability of finned tubes to a large condenser system with a bundle layout is evaluated.

Suggested Citation

  • Yeong-Jun Jang & Dong-Jae Choi & Sin Kim & Myung-Taek Hyun & Yeon-Gun Lee, 2017. "Enhancement of Condensation Heat Transfer Rate of the Air-Steam Mixture on a Passive Condenser System Using Annular Fins," Energies, MDPI, vol. 10(11), pages 1-15, November.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:11:p:1777-:d:117624
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    Cited by:

    1. Cheng-Hung Huang & Yun-Lung Chung, 2021. "Optimal Shape of Non-Linear Partially Wet Annular Fins for Maximum Efficiency," Energies, MDPI, vol. 14(4), pages 1-23, February.

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