Heat transfer characteristics of spirally-coiled circular fin-tube heat exchangers operating under frosting conditions / Mooyeon Lee in International journal of refrigeration, Vol. 34 N° 1 (Janvier 2011)  

Heat transfer characteristics of spirally-coiled circular fin-tube heat exchangers operating under frosting conditions = Caractéristiques de transfert de chaleur des échangeurs de chaleur spiralés avec tubes ailetés circulaires fonctionnant sous des conditions de givrage [texte imprimé] / Mooyeon Lee, Auteur ; Taehyung Kang, Auteur ; Youngju Joo, Auteur . - 2011 . - pp. 328-336.
Génie Mécanique
Langues : Anglais (eng)
in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 328-336

Mots-clés :	Heat transfer exchanger Correlation Frosting Pressure drop
Index. décimale :	621.5 Energie pneumatique. Machinerie et outils. Réfrigération
Résumé :	The objective of this study is to investigate the heat transfer characteristics of spirally-coiled circular fin-tube heat exchangers under frosting conditions. The heat transfer rate, pressure drop, frost thickness, and Nusselt number of the heat exchanger were measured and analyzed by varying the fin pitch and number of tube rows under frosting conditions. In addition, the Nusselt number of the spirally-coiled circular fin-tube exchanger was compared with those of flat plate fin-tube heat exchangers with discrete fins. An empirical correlation of the Nusselt number was developed as a function of the Reynolds number, dimensionless fin pitch normalized by the hydraulic diameter, i.e., Dh/Fp, Fourier number, and number of tube rows. The measured Nusselt number was consistent with the predicted value with mean and average deviations of 3.5% and 0.3%, respectively.
DEWEY :	621.5
ISSN :	0140-7007
En ligne :	http://www.sciencedirect.com/science/article/pii/S0140700710001854