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Single-phase heat transfer and pressure drop in laminar and transition flow regions inside internally helical-grooved horizontal small-diameter tubes.

Number: pap. ID: 633

Author(s) : ICHINOSE J., INOUE N.

Summary

An experimental study of heat transfer and pressure drop in single-phase laminar and transition flow inside internally helical-grooved small-diameter tubes were carried out using 10 types of tubes and a smooth small-diameter tube with an outside diameter of 4.00 mm. In the experiments, water was used as a test fluid; the inlet temperature was maintained at a constant 20°C and the flow rate was varied from 0.001 to 0.047 kg/s. Correlations to predict the friction factor were developed based upon the measured data, which can predict the experimental data within ±20%. In addition, we compared the experimental data with two heat transfer correlations in the laminar flow region. The effect of the shape of the groove in an internally grooved small-diameter tube upon heat transfer and pressure drop in laminar and transition flow regions was clarified.

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Pages: 8 p.

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Details

  • Original title: Single-phase heat transfer and pressure drop in laminar and transition flow regions inside internally helical-grooved horizontal small-diameter tubes.
  • Record ID : 30002234
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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