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Performance of stationary and vibrated thermosyphon working with water and R134a.

Author(s) : ABOU-ZIYAN H. Z., HELALI A., FATOUH M., et al.

Type of article: Article

Summary

Water and R134a are used as working fluids. Experiments are carried out over wide ranges of liquid fill ratio, length of adiabatic section, vibration frequency and input heat flux. The results showed that adiabatic length of 350 mm and liquid fill ratio of 0.5 provide the highest output heat flux. The effect of vibration is to deteriorate the water-copper thermosyphon performance below the boiling limit by 5-20% and enhance it at the onset of boiling limit by almost the same ratio over the examined range of input heat flux. Minor or no effect is experienced with R134a below the boiling limit and enhancement up to 250% existed above the boiling limit.

Details

  • Original title: Performance of stationary and vibrated thermosyphon working with water and R134a.
  • Record ID : 2002-0096
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 21 - n. 8
  • Publication date: 2001/06

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