한국태양에너지학회:학술대회논문집

The Korean Solar Energy Society (한국태양에너지학회)
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Numerical Study of Liquid Film Flow on Heat Exchanger Tube Arrangement and Configuration of Multi Effect Distillation

증발식 다중효용 담수기에서 열교환기 튜브 배열 및 형상에 따른 액막 유동에 관한 수치해석

  • Jung, Il-Young (Dept. of Refrigeration, Air-conditioning Engineering, Graduate School, Korea Maritime University) ;
  • Yun, Sang-Kook (Division of Mechanical and Information Engineering, Korea Maritime University) ;
  • Joo, Hong-Jin (Dept. of Mechanical Eng., Graduate School, In-Ha University) ;
  • Kwak, Hee-Youl (Solar Thermal Research Center, Korea Institute of Energy Research)
  • 정일영 (한국해양대학교 냉동공조학과 대학원) ;
  • 윤상국 (한국해양대학교 기계에너지시스템공학부) ;
  • 주홍진 (인하대학교 기계공학과 대학원) ;
  • 곽희열 (한국에너지기술연구원)
  • Published : 2011.11.24
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Abstract

This study was performed numerical analysis in order to analyze liquid film flow of heat exchanger tube arrangement and configuration of evaporative multi effect distillation system using medium-temperature. Simulation was accomplished the two-dimensional calculations using commercial analyses program FLUENT based on the FVM(finite volume method). Fresh water generator of this study used Shell & Tubes heat exchanger with Cu_Ni tube, configuration of tube used bare tube and corrugated tube, and arrangement of tube used in-line array and staggered array. Performance of heat exchanger through the formation of liquid film was compared and analyzed. Liquid film flow occurred that falling on heat exchanger tube wall. Result of simulation showed that liquid film thickness of in-line arrangement was found 0.57mm with bare tube and 0.67mm with corrugated tube, respectively. And liquid film thickness of staggered arrangement was found 0.39mm with bare tubes and 0.62mm with corrugated tubes, respectively. Liquid film thickness of corrugated tube showed thicker than bare tube, but heat transfer rates of corrugated tube showed higher than bare tube. The reason was considered that surface area of corrugated tube was wider than bare tube. And liquid film thickness of staggered arrangement showed thinner than in-line arrangement, so thermal performance of staggered arrangement showed higher than in-line arrangement.

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