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Experimental study of the effect of twisted-tape inserts on flow boiling heat transfer enhancement and pressure drop penalty.

Author(s) : MOGAJI T. S., KANIZAWA F. T., BANDARRA FILHO E. P., et al.

Type of article: Article, IJR article

Summary

This study presents experimental results of heat transfer coefficient and pressure drop during two-phase flow of R134a in a horizontal tube containing twisted-tape inserts. The test section is a 2 m long copper tube of 15.9 mm inner diameter. The experiments were performed for tapes with twist ratios of 9 and 14 and a tube without insert. The mass velocity ranged from 75 to 200 kg/m2.s and the vapor quality from 5 to 95%, for adiabatic condition and for constant heat flux of 10 kW/m2. Experimental pressure drop and heat transfer coefficient results are presented, and also an analysis of overall enhancement due to the inserts. The use of twisted-tape inserts is suitable if applied to the high vapor quality region of the evaporator and under high mass velocities.

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Pages: 504-515

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Details

  • Original title: Experimental study of the effect of twisted-tape inserts on flow boiling heat transfer enhancement and pressure drop penalty.
  • Record ID : 30007163
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 36 - n. 2
  • Publication date: 2013/03

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