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Assessing Thermo-hydraulic performance: Enhanced evaporation in modified plate heat exchangers.

Author(s) : VIJAYAKUMAR S., ADVAITH S., MANI A.

Type of article: IJR article

Summary

This study investigates the effects of surface modification on the performance of plate heat exchangers used in vapour compression refrigeration systems with R-407C as the refrigerant. Specifically, the research analyzes copper-coated and metal-foamed layer plate heat exchangers, comparing their performance against a conventional plain plate heat exchanger. Experimental findings revealed that the heat transfer coefficient for the copper-coated exchanger is enhanced by 23.2% within a heat flux range of 10 to 20 kW/m2 and a mass flux range of 20 to 30 kg/m2s. In contrast, the metal-foamed heat exchanger demonstrated an impressive 48% increase in heat transfer coefficient but also resulted in a 25% increase in frictional pressure drop. The coppercoated exchanger presented a minimal increase of 5% in frictional pressure drop, highlighting its efficiency in
low heat flux conditions. Thermal performance factors indicate that the copper-coated exchanger offers a 23% performance improvement over the plain corrugated plate heat exchanger, while the metal foamed exchanger exceeds the performance of the plain plate exchanger by 39%, making it suitable for high heat flux conditions. These findings underscore the potential of surface modification techniques in enhancing the performance of plate heat exchangers in refrigeration applications.

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Pages: 15 p.

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Details

  • Original title: Assessing Thermo-hydraulic performance: Enhanced evaporation in modified plate heat exchangers.
  • Record ID : 30034349
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 179
  • Publication date: 2025/11
  • DOI: http://dx.doi.org/https://doi.org/10.1016/j.ijrefrig.2025.08.027

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