PF plain-fin geometry
The procedure:
CHX_geom_PF_plain_fin(TypeHX$: S_T, a, th_f, th_s, b, b_f, D_h, theta, beta, A_fin\A)
Provides the geometric data associated with a plate finned - plain-fin type compact heat exchanger surface. These data are from Kays and London (1994).
Inputs:
The only input is the string identifying the geometry TypeHX$
2.0: 'PF_plain-fin_20'
3.01: 'pf_plain-fin_301'
3.97: 'pf_plain-fin_397'
5.3: 'pf_plain-fin_53'
6.2: 'pf_plain-fin_62'
9.03: 'pf_plain-fin_903'
11.11: 'pf_plain-fin_1111'
11.11a: 'pf_plain-fin_1111a'
14.77: 'pf_plain-fin_1477'
15.08: 'pf_plain-fin_1508'
19.86: 'pf_plain-fin_1986'
10.27T: 'pf_plain-fin_1027T'
11.94T: 'pf_plain-fin_1194T'
12.00T: 'pf_plain-fin_1200T'
16.96T: 'pf_plain-fin_1696T'
25.79T: 'pf_plain-fin_2579T'
30.33T: 'pf_plain-fin_3033T'
46.45T: 'pf_plain-fin_4645T'
Outputs:
S_T = transverse fin spacing (m or ft)
a = lateral shift in fin across gap (m or ft) (= 0 for straight fins, =S_T/2 for triangular fins)
th_f = thickness of fin material (m or ft)
th_s = thickness of splitter plate material (m or ft) (=0 for fins with no splitter)
b = plate gap (m or ft)
b_f = fin spacing (m or ft) (=b for fins with no splitter)
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 a units=m
$VarInfo b units=m
$VarInfo b_f units=m
$VarInfo beta units=1/m
$VarInfo D_h units=m
$VarInfo S_T units=m
$VarInfo th_f units=m
$VarInfo th_s units=m
TypeHX$= 'pf_plain-fin_4645T'
Call chx_geom_pf_plain_fin(TypeHX$: S_T, a, th_f, th_s, b, b_f, D_h, theta, beta, A_fin\A)
{Solution:
S_T = 0.0005467 [m]
a = 0.0002734 [m]
th_f = 0.000051 [m]
th_s = 0
b = 0.00254 [m]
b_f = 0.00254 [m]
D_h = 0.000805 [m]}
Related procedures include: