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Document IIF

Une étude expérimentale sur l'amélioration du transfert de chaleur du R410A avec un effet de pulsation dans des tubes horizontaux lisses et à micro-ailettes.

An experimental study on the evaporative heat transfer enhancement for R410A with pulsating effect in horizontal smooth and micro-fin tubes.

Auteurs : CHO J. M., CHOI J. W., KIM D. H., et al.

Résumé

There have been several studies for heat transfer enhancement using various methods such as micro-fin tube. In this study, evaporative heat transfer enhancement for R410A in horizontal smooth and micro-fin tubes is investigated under pulsating flow conditions with various frequencies and amplitudes. Smooth and micro-fin tubes with outer diameters of 5 mm and length of 1.44 m were selected as test tubes. The tests were conducted at mass flow rates of 1.4, 4.0, and 6.0 g/s, saturation temperature of -5°C and heat flux of 20 kW/m2. The pulsating conditions were varied from 1 to 8 Hz for frequencies as well as for amplitudes of 1 and 2 mm. The pulsation definitely contributed to the heat transfer enhancement for most test conditions, and this method can be used to save energy.

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Pages : 2009-5

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Détails

  • Titre original : An experimental study on the evaporative heat transfer enhancement for R410A with pulsating effect in horizontal smooth and micro-fin tubes.
  • Identifiant de la fiche : 2009-1939
  • Langues : Anglais
  • Source : 3rd Conference on Thermophysical Properties and Transfer Processes of Refrigerants
  • Date d'édition : 23/06/2009

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