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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Evaluation of Heat Transfer performance of Wire-coil Inserted Tube

와이어코일 삽입법을 이용한 열전달 촉진기술 성능평가

  • 이주동 (영남대학교 기계공학과 대학원) ;
  • 박종호 (영남대학교 기계공학과 대학원) ;
  • 이상천 (영남대학교 기계공학부)
  • Published : 2000.05.01
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Abstract

An experiment was carried out to evaluate the thermal performance of the wire-coil inserts method. Tested were the smooth tubes with the wire-nil inserts of various pitch and helix angle combinations. Test fluids were the 50%-solution of the ethylene glycol and the Hue water. Heat transfer coefficient and friction factors were deduced from the measured values of temperatures, flowrates and pressure drops. A unified dimensionless correlation for the heat transfer coefficients was developed as a function of the pitch to diameter ratio, the Reynolds number and the Prandtl number. An exergy analysis was performed to evaluate an optimal operating condition with the wire-coil inserts.

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References

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