PF pin-fin geometry
The procedure:
CHX_Geom_PF_pin_fin(TypeHX$: S_T, S_L, D_fin_min, D_fin_max, b, D_h, theta, beta, A_fin\A)
Provides the geometric data associated with a plate finned - pin-fin type compact heat exchanger surface. These data are from Kays and London (1994).
Inputs:
The only input is the string identifying the geometry TypeHX$
AP-1: 'PF_pin-fin_AP1'
AP-2: 'PF_pin-fin_AP2'
PF-3: 'PF_pin-fin_PF3'
PF-4(F): 'PF_pin-fin_PF4F'
PF-9(F): 'PF_pin-fin_PF9F'
PF-10(F): 'PF_pin-fin_PF10F'
Outputs:
S_T = transverse fin spacing (m or ft)
S_L = longitudinal fin spacing (m or ft)
D_fin_min = minimum fin diameter (m or ft)
D_fin_max = maximum fin diameter (m or ft), same as D_fin_min for round fins
b = plate spacing (fin length) (m or ft)
D_h = hydraulic diameter defined as 4 x minimum flow area x length/heat transfer area (m or ft)
theta = minimum flow area/frontal area for finned surface side only
beta = heat transfer area/volume (m^2/m^3 or ft^2/ft^3) for finned surface side only
A_fin\A = heat transfer area on fins/heat transfer area for finned surface side only
Example
$UnitSystem SI Mass J K Pa
$Varinfo b units=m
$Varinfo beta units=m^2/m^3
$Varinfo D_fin_max units=m
$Varinfo D_fin_min units=m
$Varinfo D_h units=m
$VarInfo S_L units=m
$VarInfo S_T units=m
TypeHX$='PF_pin-fin_AP-1'
Call chx_geom_pf_pin_fin(TypeHX$: S_T, S_L, D_fin_min, D_fin_max, b, D_h, theta, beta, A_fin\A)
{Solution:
S_T = 0.003175 [m]
S_L = 0.003175 [m]
D_fin_min = 0.00102 [m]
D_fin_max = 0.00102 [m]
b = 0.0061 [m]
D_h = 0.004404 [m]
theta = 0.6791
beta = 616.8 [m^2/m^3]
A_fin\A = 0.512}
Related procedures include: