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Caractéristiques du givre et du transfert de chaleur sur une plaque plate dans des conditions de fonctionnement givrants. 1. Expériences et corrélations.

Frost characteristics and heat transfer on a flat plate under freeze operating conditions. 1. Experimentation and correlations.

Auteurs : CHEN H., BESANT R. W., TAO Y. X.

Résumé

Measured results show that the frost characteristics differ significantly with frost growth data taken previously for room temperature airflow. Depending on the temperature of the cold plate and the relative humidity of the subfreezing supply air, the frost could appear to be either smooth or rough. Smooth frost, which occurred at warmer plate temperatures and lower supply air relative humidities, gave rise to frost growth that was much thinner and denser than that for the rough, thick, low-density frost. Frost growth characteristics are correlated as a function of five independent variables (time, distance from the leading edge, cold plate temperature ratio, humidity ratio, and Reynolds number). These correlations are presented separately for the full data set, the rough frost data, and the smooth frost data.

Détails

  • Titre original : Frost characteristics and heat transfer on a flat plate under freeze operating conditions. 1. Experimentation and correlations.
  • Identifiant de la fiche : 2001-1733
  • Langues : Anglais
  • Source : ASHRAE Transactions. 1999 Annual Meeting, Seattle, Washington + CD-ROM.
  • Date d'édition : 1999
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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