Parametric Evaluation of the Flow Boiling Heat Transfer Properties of R22 and R407c inside Horizontal Microfin Tube

Table 2

Testing tube geometries.

Variable	Microfin tube dimensions
OD	9.52 mm
ID	8.52 mm
Wall thickness	0.5 mm
Helix angle	22°
Apex angle	48°
Fin height	0.22 mm
Number of fins	65
Length	1000 mm