한국전산유체공학회지 (Journal of computational fluids engineering)

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
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판형 열교환기 Full-scale 해석을 위한 1차원 유동 네트워크 모델 및 ε-NTU 모델의 수치적 연구

NUMERICAL STUDY FOR THE FULL-SCALE ANALYSIS OF PLATE-TYPE HEAT EXCHANGER USING ONE-DIMENSIONAL FLOW NETWORK MODEL and ε-NTU METHOD

  • 김민성 (부산대학교 기계공학부) ;
  • 민준기 (부산대학교 롤스로이스 대학기술센터) ;
  • 하만영 (부산대학교 기계공학부)
  • Kim, Minsung (School. of Mechanical Engineering, Pusan Nat'l Univ.) ;
  • Min, June Kee (Rolls-Royce Technology Centre in Thermal Management, Pusan Nat'l Univ.) ;
  • Ha, Man Yeong (School. of Mechanical Engineering, Pusan Nat'l Univ.)
  • 투고 : 2013.12.06
  • 심사 : 2014.03.06
  • 발행 : 2014.03.31
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초록

Since a typical plate heat exchanger is made up of a huge number of unitary cells, it may be impossible to predict the aero-thermal performance of the full scale heat exchanger through three-dimensional numerical simulation due to the enormous amount of computing resources and time required. In the present study, a simple flow-network model using the friction factor correlation and a thermal-network model based on the effectiveness-number of transfer units (${\varepsilon}$-NTU) method has been developed. The complicated flow pattern inside the cross-corrugated heat exchanger has been modeled into flow and thermal networks. Using this model, the heat transfer between neighboring streams can be considered, and the pressure drop and the heat transfer rate of full-scale heat exchanger matrix are calculated. In the calculation, the aero-thermal performance of each unitary cell of the heat exchanger matrix was evaluated using correlations of the Fanning friction factor f and the Nusselt number Nu, which were calculated by unitary-cell CFD model.

키워드

참고문헌

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