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Experiments on the evaporation characteristics of R410A in brazed plate heat exchangers with different geometric configurations.

Author(s) : HAN D. H., LEE K. J., KIM Y. H.

Type of article: Article

Summary

Experiments on the evaporative heat transfer and pressure drop in brazed plate heat exchangers were performed with R410A and R22 refrigerants. Plate heat exchangers with different 45°, 35°, and 20° chevron angles are used. Varying the mass flux of refrigerant (13-34 kg/m² s), the evaporating temperature (5, 10 and 15 °C), the vapour quality (0.9-0.15) and heat flux (2.5, 5.5 and 8.5 kW/m²), the evaporation heat transfer coefficients and pressure drops were measured. The heat transfer coefficient increases with increasing vapour quality and decreasing evaporating temperature at a given mass flux in all plate heat exchangers. The pressure drop increases with increasing mass flux and quality and with decreasing evaporating temperature and chevron angle. It was found that the heat transfer coefficients of R410A were higher than those of R22 and the pressure drops of R410A were lower than those of R22.

Details

  • Original title: Experiments on the evaporation characteristics of R410A in brazed plate heat exchangers with different geometric configurations.
  • Record ID : 2004-0593
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 23 - n. 10
  • Publication date: 2003/07

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