대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제24권9호
  • /
  • Pages.1239-1246
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  • 2000
  • /
  • 1226-4881(pISSN)
  • /
  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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일정 벽면 온도 조건에서 이성분 혼합물의 핵비등시 벽면 열유속 거동

Wall Heat Flux Behavior of Nucleate Pool Boiling Under a Constant Temperature Condition in a Binary Mixture System

  • 배성원 (한라공조 주식회사) ;
  • 이한춘 (포항공과대학교 대학원 기계공학과) ;
  • 김무환 (포항공과대학교 기계공학과)
  • 발행 : 2000.09.01
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초록

The objective of this work is to measure space and time resolved wall heat fluxes during nucleate pool boiling of R113/R11 mixtures using a microscale heater array in conjunction with a high speed CCD. The microscale heater array is constructed using VLSI techniques, and consists of 96 serpentine platinum resistance heaters on a transparent quartz substrate. Electronic feedback circuits are used to keep the temperature of each heater at a specified temperature and the variation in heating power required to keep the temperature constant is measured. Heat flux data around an isolated bubble are obtained with triggered CCD images. CCD images are obtained at a rate of 1000frames/second. The heat transfer variation vs. time on the heaters directly around the nucleation site is plotted and correlated with images of the bubble obtainedby using the high speed CCD. For both of the mixture(R11/R113) and pure system(pure R11, pure R113), the wall heat fluxes are presented and compared to find out the qualitative difference between pure and binary mixture nucleate boiling.

키워드

참고문헌

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