DOI QR코드

DOI QR Code

A Fundamentals study on Heat Exchanger using Deep Ocean Water: Effects of Corrosion on Heat Transfer Performance

심층수 이용 열교환기 개발을 위한 기초연구: 열교환기 부식이 열교환기 성능에 미치는 영향

  • Kwon, Young-Chul (Department of Mechanical Engineering, Sunmoon University) ;
  • Lee, Seok-Hyun (Department of Mechanical Engineering, Sunmoon University) ;
  • Huh, Cheol (Offshore CCS Research Unit, Maritime & Ocean Engineering Research Insititue, Korea Institute of Ocean Science and Technology) ;
  • Cho, Meang-Ik (Offshore CCS Research Unit, Maritime & Ocean Engineering Research Insititue, Korea Institute of Ocean Science and Technology) ;
  • Lee, Chang-Kyung (School of Mechanical Engineering, Hoseo University) ;
  • Kwon, Jeong-Tae (School of Mechanical Engineering, Hoseo University)
  • 권영철 (선문대학교 기계공학과) ;
  • 이석현 (선문대학교 기계공학과) ;
  • 허철 (한국해양과학기술원 선박해양플랜트연구소 해양CCS연구단) ;
  • 조맹익 (한국해양과학기술원 선박해양플랜트연구소 해양CCS연구단) ;
  • 이창경 (호서대학교 기계공학부) ;
  • 권정태 (호서대학교 기계공학부)
  • Received : 2013.10.14
  • Accepted : 2013.11.07
  • Published : 2013.11.30

Abstract

This paper presents the effects of the tube materials and corrosion on the heat transfer performance of double-tube heat exchangers for the development of heat exchangers using deep sea water. Heat exchangers made of titanium, aluminum. stainless steel, iron, copper, and aluminum with electro-deposition coatings(Carbon black_$15{\mu}m$, Carbon black_$150{\mu}m$) were tested. Also, the heat transfer rate of each heat exchanger was calculated by using EES program. For the acceleration of corrosion by sea water, the temperature of sea water $70^{\circ}C$ and the concentration of salt 3.5% were considered. And the specimens were immersed in sea water during 6 weeks. From the above experiment and analysis, aluminum with electro-deposition coating(Carbon black_$150{\mu}m$) can be considered the most promising candidate for the replacement of titanium heat exchanger.

본 논문은 심층수용 열교환기 재질로 티타늄, 알루미늄, 스테인리스, 구리와 알루미늄을 코팅하여 재질의 특성 및 부식이 미치는 영향을 조사하기 위하여 이중관 열교환 실험장치를 활용하였다. 열교환기 재질은 티타늄, 스테인레스, 구리, 알루미늄, 카본 코팅된 알루미늄 등 6종이 비부식관과 부식관에 대하여 해석과 실험이 수행되었다. 해석은 EES 프로그램을 사용하였다. 부식의 영향을 살펴보기 위하여 부식 제조장치를 제작하고, 3.5%의 염수를 $70^{\circ}C$의 온도로 약 6주간 담가서 가속부식을 실시하였다. 부식된 관으로 이중관 열교환기의 성능실험을 실시하여 비부식관과 비교하였다. 실험결과로부터 티타늄을 대체용으로 알루미늄 코팅관(카본 블랙 $150{\mu}m$)의 가능성을 확인하였다.

Keywords

References

  1. G. C. Jang, Y. J. Baek, H. S. Ra, J. Y. Kim, J. H. Lee, The Operation characteristics of a sea water source heat pump system, The Society of Air-Conditioning and Refrigerating Engineers of Korea, Collected papers of summer research meeting, pp.1353-1357, June, 2008.
  2. J. G. Kim, K. H. Kim, S. J. Kim, G. H. Park, K. M. Moon, An Electrochemical Study on the Corrosion Property of Materials for Sea Water Heat Exchange System, International Conference on Marine Engineering, Vol.26, No 1, pp.99-107, 2002.
  3. K. Y. Kim, K. W. Lee, Y. C. Kwon, J. T. Kwon, C. Huh, Study on metal corrosion characteristics according to the long-term corrosion under high temperature, The Society of Air-Conditioning and Refrigerating Engineers of Korea, pp. 475-477, November, 2012.
  4. O. B. Kwon, Introduction to Thermodynamics & Heat Transfer, 4th ed, McGraw-Hill, pp 346-391, 2008.
  5. U. G. Lim, G. C. Jeong, S. Y. Lee, Corrosion and Protection of Mechanical Materials, Hyung Seul Pub., 2006.
  6. D. A. Jones, Principles and prevention of Corrosion, Prentice Hall, 2004.