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EFFECT OF SURFACE WETTABILITY ON POOL BOILING : ENHANCEMENT BY HYDROPHOBIC COATING
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  • EFFECT OF SURFACE WETTABILITY ON POOL BOILING : ENHANCEMENT BY HYDROPHOBIC COATING
  • EFFECT OF SURFACE WETTABILITY ON POOL BOILING : ENHANCEMENT BY HYDROPHOBIC COATING
저자명
Takata. Yasuyuki,Hidaka. Sumitomo,Kohno. Masamichi
간행물명
International journal of air-conditioning and refrigeration
권/호정보
2012년|20권 1호|pp.32767-32767 (1 pages)
발행정보
대한설비공학회
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Pool boiling froma super-water-repellent (SWR) and polytetrafluoroethylene (PTFE) surface with checkered and spotted patterns has been studied experimentally. The heat transfer surfaces are copper with the SWR coating of checkered and spotted patterns and $TiO_2$-coated surface with PTFE spotted patterns. The domain of SWR and PTFE acts as nucleation sites and, therefore, bubble nucleation starts at very low superheating. In lower heat flux, bubbles with uniform size are generated on the SWR or PTFE domain of the heat transfer surface. These bubbles depart from the heat transfer surface when the contact line reaches the boundary of SWR or PTFE domain. Nucleate boiling with this surface was enhanced by seven times compared with the normal copper surface. The best was the spotted PTFE surface coated on $TiO_2$ superhydrophilic surface.