한국가시화정보학회:학술대회논문집
- 한국가시화정보학회 2006년도 추계학술대회 논문집
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- Pages.125-130
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- 2006
나노유체의 임계열유속 및 비등특성에 미치는 나노입자 크기의 영향
Effect of particle sizes on CHF enhancement and boiling characteristics of nano-fluids
- 발행 : 2006.12.01
초록
The characteristics of boiling heat transfer and critical heat flux (CHF) behavior of nano-fluids were studied by using various sized silver and alumina nanoparticles. The diameter of nanoparticles was from 2 nm to 250 nm for silver and from 20nm to 40nm for alumina. Pool boiling characteristics and CHF enhancement of nano-fluids with different sized nanoparticles were compared with those of pure water and each nano-fluids. The experiment was performed at atmospheric pressure and the temperature of the pool was maintained constantly by using a flat immersed heater. The concentration of nano-fluids was uniform in all experiments as 0.01g/liter. The results showed that the measured boiling curves were shifted to the right. It demonstrated that the occurrence of nucleate boiling regime in nano-fluids retarded, compared with that of pure water. Also, in nano-fluids, the boiling curves showed that CHF of nano-fluids is significantly enhanced and represented the effect of particle size on boiling characteristics.