DOI QR코드

DOI QR Code

나노유체에서 파울링 현상이 유동 비등 열전달에 미치는 영향에 대한 연구

김우중;양용우;김영훈;박성식;김남진
Kim, Woojoong;Yang, Yongwoo;Kim, Younghun;Park, Sungseek;Kim, Namjin

  • 투고 : 2015.11.02
  • 심사 : 2016.02.02
  • 발행 : 2016.03.10

초록

A boiling heat transfer is used in various industry such as power generation systems, heat exchangers, air-conditioning and refrigerations. In the boiling heat transfer system, the critical heat flux (CHF) is the important factor, and it indicated safety of the system. It has kept up studies on the CHF enhancement. Recently, it is reported the CHF enhancement, when working fluid used the nanofluid with high thermal properties. But it could be occurred nanoflouling phenomenon from nanoparticle deposition, when nanofluid applied the heat transfer system. And, it is reported that the safety and thermal efficiency of heat transfer system could decrease. Therefore, it is compared and analyzed to the CHF and the boiling heat transfer coefficient on effect of artificial nanofouling (coating) in oxidized multi-wall carbon nanotube nanofluids. As the result, the CHF of oxidized multi-wall carbon nanofluids and the CHF of artificial nanofouling in the nanofluids increased to maximum 99.2%, 120.88%, respectively. A boiling heat transfer coefficient in nanofluid increased to maximum 24.29% higher than purewater, but artificial nanofouling decreased to maximum -7.96%.

키워드

탄소나노튜브;나노유체;유동 비등 열전달;임계 열유속;열전달 계수

참고문헌

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과제정보

연구 과제 주관 기관 : 제주대학교