동력기계공학회지 (Journal of Power System Engineering)

  • 제14권4호
  • /
  • Pages.11-16
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  • 2010
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  • 2713-8429(pISSN)
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  • 2713-8437(eISSN)
한국동력기계공학회 (The Korean Society for Power System Engineering)
권호 표지

자연냉매 프로판을 이용한 수평세관 증발기의 열전달 특성에 관한 연구

Study on Heat Transfer Characteristics of Evaporator with Horizontal Small Diameter Tubes using Natural Refrigerant Propane

  • 구학근 (동명대학교 냉동공조공학과)
  • 투고 : 2010.06.04
  • 심사 : 2010.06.22
  • 발행 : 2010.08.31
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초록

The evaporation heat transfer characteristics of propane(R-290) in horizontal small diameter tubes were investigated experimentally. The test tubes have inner diameters of 1 mm and 4 mm. Local heat transfer coefficients were measured at heat fluxes of 12, $24\;kW/m^2$, mass fluxes of 150, $300\;kg/m^2s$, and evaporation temperature of $15^{\circ}C$. The experimental results showed that the evaporation heat transfer coefficient of R-290 has an effect on heat flux, mass flux, tube diameter, and vapor quality. The evaporation heat transfer of R-290 has an influenced on nucleate boiling at low quality and convective boiling at high quality. The evaporation heat transfer coefficient of R-290 increases with decreasing inner tube diameter. And the evaporation heat transfer coefficient of R-290 is about 1~3 times higher than that of R-134a.

키워드

참고문헌

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