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Étude du phénomène de givrage entre une plaque concave et une plaque convexe sous convection forcée : prévision de la croissance de la couche de givre grâce à l’observation de l’expérience multi-cycle de givre et de dégivrage.

Study on the frosting phenomena between concavity and convexity plate under forced convection - The prediction of frost layer growth using the observation from the frost and defrost multi-cycle experiment. 

Numéro : No 244

Auteurs : KATSUTA M., IKUTAYA S., TERAKADO Y., YAMAGISHI J., ASAKAWA R., BAE S.

Résumé

Recently, the development of hybrid and electric vehicles has been promoted. Along with this, since the impact reduction for cruising distance and the securing of the heat source are problems, changes are also required for the air conditioner. Therefore, high efficiency of the air conditioning system by improving efficiency of the heat exchanger has become more necessary. However, due to frost formation of the outside heat exchanger in a cold climate region, increase of pressure drop and decrease of heat transfer rate are supposed to be an application difficulty of HP systems.
The objective of this study is to analyze the mechanism of frosting phenomenon in a fin-less heat exchanger. This is intended to clarify the advantage in terms of frost strength and defrosting performance of a fin-less heat exchanger.
In this research, the frost and defrost multi cycle experiment are established and the qualitative characteristics are investigated. Through observation of frost layer growth in the continuous experiment, ice column growth such as initial ice column diameter and ice column distance is grasped and influence of wettability on ice column growth is also confirmed.

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Pages : 10 p.

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Détails

  • Titre original : Study on the frosting phenomena between concavity and convexity plate under forced convection - The prediction of frost layer growth using the observation from the frost and defrost multi-cycle experiment. 
  • Identifiant de la fiche : 30030057
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Date d'édition : 31/08/2021

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