마이크로 소결 구조 채널에서의 흐름 비등 열전달 특성 연구

김영환; 신동환; 김진섭; 문우용; 허재훈; 이정호

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자료유형: 학술저널

저자정보: 김영환 신동환 김진섭 문우용 허재훈 이정호

저널정보: 한국수소및신에너지학회 한국수소및신에너지학회논문집 한국수소 및 신에너지학회 논문집 제29권 제1호

발행연도: 2018.2

수록면: 105 - 110 (6page)

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The flow boiling heat transfer of water was experimentally investigated on plain and sintered microporous surfaces in a mini-channel. The effects of microporous coating on flow boiling heat transfer of subcooled water were investigated in a 300 mm long mini-channel with a cross section of 20×10 mm². The test section has sufficiently long entrance length of 300 mm which provides a fully-developed flow before the channel inlet. The bottom side of the channel was heated by a copper block assembled with a high-density cartridge heater and other sides of the channel were insulated. The microporous surface was fabricated by sintering copper particles with the average particle size of 50 μm on the top side of the copper block. Heat transfer measurement was conducted at the mass flux of 208 kg/m²s and the heat flux up to 500 kW/m². Microporous coated surface showed an earlier boiling incipience compared with plain surface regardless of the mass flux. Microporous coating were significantly attributed to local wall temperature and local heat transfer coefficient for flow boiling.

#국소 열전달계수 #마이크로다공질 코팅 #이상 유동 #흐름 비등 #Flow boiling #Local heat transfer coefficient #Microporous coating #Two-phase flow

참고문헌 (11)

참고문헌 신청

T. N. Tran / 1996 / Small Circular- and Rectangular-channel Boiling with Two Refrigerants / International Journal of Multiphase Flow 22(3):485~498

Z. Y. Bao / 2000 / Flow Boiling Heat Transfer of Freon R11 and HCFC123 in Narrow Passages / International Journal of Heat and Mass Transfer 43(18):3347~3358

C. A. Chen / 2009 / Subcooled Flow Boiling Heat Transfer of R-407C and Associated Bubble Characteristics in a Narrow Annular Duct / International Journal of Heat and Mass Transfer 52(13-14):3147~3158

K. N. Rainey / 2001 / Flow Boiling Heat Transfer from Plain and Microporous Coated Surfaces in Subcooled FC-72 / ASME Journal of Heat Transfer 123(5):918~925

S. G. Kandlikar / 2002 / Two-phase Flow Patterns, Pressure Drop, and Heat Transfer during Boiling in Minichannel Flow Passages of Compact Evaporators / Heat Transfer Engineering 23(1):5~23

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