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Condensation heat transfer and pressure drop of R410A inside a horizontal smooth small-diameter tube.

Number: pap. ID: 155

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

Summary

In this paper, the authors present an experimental study of condensation heat transfer and pressure drop using a horizontal smooth small-diameter tube with an outside diameter of 4.00 mm. The experimental apparatus is a vapor-compression heat pump system, which consists of a compressor, a pre-condenser, test sections, a rear-condenser, a receiver, an electronic expansion valve, an evaporator, and heat-source systems. In the experiments, R410A was used as the refrigerant; the ranges of refrigerant mass flow velocity varied from around 215 to 1290 (kg/m2s), and the condensation saturated temperatures were maintained at 35 and 40°C. From the experimental results, we compared the experimental local condensation heat-transfer coefficients and pressure drops with the empirical correlation proposed by the authors and others. The experimental values of the local condensation heat-transfer coefficients agreed within ± 35% with the empirical correlation proposed by the authors. The experimental values and the estimation formula for pressure drop agreed within ± 20% in the range of 850 kg/m2s or more by the authors.

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Pages: 8 p.

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Details

  • Original title: Condensation heat transfer and pressure drop of R410A inside a horizontal smooth small-diameter tube.
  • Record ID : 30001577
  • 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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