Partager

Une étude expérimentale des effets d'un écoulement descendant de givre fondu sur un serpentin extérieur vertical à circuits multiples dans une pompe à chaleur aérothermique sur la performance de dégivrage pendant l'inversion de cycle.

An experimental study on the effects of downwards flowing of melted frost over a vertical multi-circuit outdoor coil in an air source heat pump on defrosting performance during reverse cycle defrosting.

Auteurs : SONG M., DENG S., PAN D., et al.

Type d'article : Article

Résumé

A previous related study has indicated that for an air source heat pump (ASHP) unit having a vertically installed multi-circuit outdoor coil, during reverse cycle defrosting, downwards flowing of melted frost over the outdoor coil surface could affect the defrosting performance, without however giving a detailed quantitative analysis. Therefore an experimental study has been carried out and the study results are reported in this paper. Firstly, a detailed description of a specially built experimental ASHP unit having a vertical multi-circuit outdoor coil is presented. This is followed by reporting the experimental results. Finally, a detailed quantitative analysis is presented. The experimental results and the corresponding analysis demonstrated that allowing downwards flowing of the melted frost over a vertical multi-circuit outdoor coil would result in a longer defrosting duration and more energy consumption. The study results also suggested that the use of water collecting trays can help mitigate these negative impacts on defrosting performance.

Détails

  • Titre original : An experimental study on the effects of downwards flowing of melted frost over a vertical multi-circuit outdoor coil in an air source heat pump on defrosting performance during reverse cycle defrosting.
  • Identifiant de la fiche : 30011488
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 67 - n. 1-2
  • Date d'édition : 06/2014
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2014.03.020

Liens


Voir d'autres articles du même numéro (16)
Voir la source

Indexation