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Effect of tube diameter on boiling heat transfer of R134a in horizontal small-diameter tubes.

Author(s) : SAITOH S., DAIGUJI H., HIHARA E.

Type of article: Article

Summary

The boiling heat transfer of refrigerant R134a flow in horizontal small-diameter tubes with inner diameter of 0.51, 1.12, and 3.1 mm was experimentally investigated. Local heat transfer coefficient and pressure drop were measured for a heat flux ranging from 5 to 39 kW/m2, mass flux from 150 to 450 kg/m2.s, evaporating temperature from 278.15 to 288.15 K, and inlet vapour quality from 0 to 0.2. Results showed that with decreasing tube diameter, the local heat transfer coefficient starts decreasing at lower vapour quality.

Details

  • Original title: Effect of tube diameter on boiling heat transfer of R134a in horizontal small-diameter tubes.
  • Record ID : 2006-1148
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 48 - n. 23-24
  • Publication date: 2005/11

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