Heat transfer measurements and correlation of refrigerant flow boiling in tube filled with copper foam / Yu Zhu in International journal of refrigeration, Vol. 38 (Février 2014)  

Heat transfer measurements and correlation of refrigerant flow boiling in tube filled with copper foam = Mesures du transfert de chaleur et corrélation entre les mesures et l'ébullition en écoulement du frigorigène à l'intérieur d'un tube rempli de mousse de cuivre [texte imprimé] / Yu Zhu, Auteur ; Haitao Hu, Auteur ; Shuo Sun, Auteur . - 2014 . - pp. 215–226.
Refrigeration
Langues : Anglais (eng)
in International journal of refrigeration > Vol. 38 (Février 2014) . - pp. 215–226

Mots-clés :	Metal foam  Flow  Boiling  Flow pattern  Heat transfer  Correlation
Résumé :	Flow boiling heat transfer characteristics of refrigerant in tubes filled with metal foams were experimentally investigated at a saturation temperature of 7 °C, mass flux from 10 to 90 kg m−2 s−1, vapor quality from 0.1 to 0.8 and heat flux from 3.1 to 18.3 kW m−2. The refrigerant is R410A. The test sections are tubes with inner diameter of 23.4 or 13.8 mm, filled with 5 or 10 PPI copper foam. The experimental results reveal that, metal foam enhances the flow boiling heat transfer by a maximum of 220% and promotes the flow pattern transition from stratified flow to stratified-wavy flow and from stratified-wavy flow to annular flow. The heat transfer coefficient decreases with vapor quality under low mass flux, while it increases with vapor quality under high mass flux. A correlation for predicting the flow boiling heat transfer was developed and it agrees well with the experimental data.
En ligne :	http://www.sciencedirect.com/science/article/pii/S0140700713001011