Forced convective boiling of nonazeotropic refrigerant mixtures inside enhanced surface tubing

Abstract:

An experimental study on the characteristics of two phase flow boiling of pure refrigerants such as R12 and R22 as well as nonazeotropic refrigerant mixtures R22/R114 and R22/R152a inside horizontal enhanced surface tubing is presented. The enhanced surface tubing results showed a significant improvement of the heat transfer over that of an equivalent smooth tube, depending on the mixture components and their concentrations. Correlations are proposed to pbkp_redict the heat transfer characteristics such as average heat transfer coefficients as well as pressure drops of nonazeotropic refrigerant mixture flow boiling inside enhanced surface tubing. In addition, it was found that the refrigerant mixtures pressure drop is a weak function of the mixture compositions. Copyright © 1992 John Wiley & Sons, Ltd.

Año de publicación:

1992

Keywords:

• Heat Transfer
• Nonazeotropic mixtures
• Enhanced surface
• Boiling

Fuente:

scopus