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Investigation on heat transfer and pressure drop during swirl flow boiling of R134a in a horizontal tube.

Author(s) : AKHAVAN-BEHABADI M. A., KUMAR R., JAMALI M.

Type of article: Article

Summary

An experimental investigation has been carried out to study the effect of twisted tape inserts on heat transfer enhancement and pressure drop in a horizontal tube during swirl flow boiling of R134a. The test-evaporator was an electrically heated horizontal copper tube and twisted tapes with different twist ratios of 6, 9, 12 and 15 were inserted one by one. The data were acquired at the refrigerant mass velocities of 54, 86, 114 and 136 kg/s m2. The twisted tape inserts increases the boiling heat transfer coefficients and the pressure drop across the test-evaporator. An empirical correlation has also been developed to predict the swirl flow pressure drop in the test-evaporator. [Reprinted with permission from Elsevier. Copyright, 2008].

Details

  • Original title: Investigation on heat transfer and pressure drop during swirl flow boiling of R134a in a horizontal tube.
  • Record ID : 2009-1966
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 52 - n. 7-8
  • Publication date: 2009/03
  • DOI: http://dx.doi.org/10.1016/j.ijheatmasstransfer.2008.09.034

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