설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)

  • 제18권8호
  • /
  • Pages.627-634
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  • 2006
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

판형 열교환기에서 맥동유동이 냉매의 증발에 미치는 영향

Effects of Pulsating Flow on Evaporation of Refrigerant in a Plate Heat Exchanger

  • 강병하 (국민대학교 기계자동차공학부) ;
  • 정일권 (국민대학교 대학원) ;
  • 김석현 (국민대학교 기계자동차공학부)
  • Kang Byung-Ha (School of Mechanical and Automotive Engineering, Kookmin University) ;
  • Jeong Il-Kwon (Graduate School, Kookmin University) ;
  • Kim Suk-Hyun (School of Mechanical and Automotive Engineering, Kookmin University)
  • 발행 : 2006.08.01
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초록

Evaporation heat transfer characteristics by pulsating flow in a plate heat exchanger have been investigated experimentally in this study. R-l34a is evaporated by receiving heat from the hot water in the plate heat exchanger. The pulsating frequency in refrigerant side of the plate heat exchanger is varied in the range of 5-25 Hz. The operating pressure of R-l34a and mass flux of hot water are also varied 0.6-0.9 MPa and $45-105 kg/m^2s$, respectively. The experimental results indicate that evaporation heat transfer coefficient of pulsating flow is improved up to 6.3% compared with that of the steady flow at 10 Hz and $G_w=45 kg/m^2s$. It is also found that the evaporation heat transfer enhancement ratio is decreased with an increase in mass flux of hot water, and the evaporation heat transfer enhancement is little influenced by operating pressure of R-l34a.

키워드

참고문헌

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