Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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Evaluation of Heat Transfer Enhancement Performance for Wire Coil Inserts in Horizontal Smooth Tubes

수평 평활관 내부에 삽입한 와이어코일 인서트에 대한 전열성능평가

  • 남상철 (영남대학교 대학원 기계공학과) ;
  • 이주동 (영남대학교 대학원 기계공학과) ;
  • 이상천 (영남대학교 기계공학부)
  • Published : 2000.09.01
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Abstract

본 연구는 다양한 각도를 가지는 와이어코일을 사용하여 관내 단상 열전달 촉진 및 압력강하 특성 실험을 수행하였다. 작동유체는 순수 물과 에틸렌글리콜을 체적비율로 50% 혼합하여 사용하였으며, 시험부 관지름은 11mm와 13.88mm이고, 시험부 길이는 760mm를 사용하였다. 평활관과 와이어코일을 삽입한 열전달촉진관에 대한 관내 열전달계수와 마찰계수는 실험에서 측정한 온도, 유량, 압력강하 값을 기초로 구하였다. 와이어코일에 대한 거친표면해석을 수행하였으며, 그 결과를 거칠기 래이놀즈수에 대한 운동량전송 거칠기함수와 열전달 거칠기함수로 표현하였으며 이에 대한 상관식을 제시하였다. 이 상관식들은 거칠기 레이놀즈수, 코일 각도, 프란틀수의 함수로 표현하였다.

Keywords

References

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