PF plain-fin DP
The procedure:
CHX_DP_PF_plain_fin(TypeHX$, m_dot, A_fr_tot, b_2, L, Fluid$, T_i, T_o, P: DELTAP)
provides the pressure drop associated with a plain-fin compact heat exchanger surface. These data are from Kays and London (1994).
Inputs
TypeHX$: string identifying the geometry
2.0: 'PF_plain-fin_20'
3.01: 'PF_plain-fin_301'
3.97: 'PF_plain-fin_397'
5.3: 'PF_plain-fin_53'
6.2: 'PF_plain-fin_62'
9.03: 'PF_plain-fin_903'
11.11: 'PF_plain-fin_1111'
11.11a: 'PF_plain-fin_1111a'
14.77: 'PF_plain-fin_1477'
15.08: 'PF_plain-fin_1508'
19.86: 'PF_plain-fin_1986'
10.27T: 'PF_plain-fin_1027T'
11.94T: 'PF_plain-fin_1194T'
12.00T: 'PF_plain-fin_1200T'
16.96T: 'PF_plain-fin_1696T'
25.79T: 'PF_plain-fin_2579T'
30.33T: 'PF_plain-fin_3033T'
46.45T: 'PF_plain-fin_4645T'
m_dot: mass flow rate (kg/s or lbm/hr)
A_fr_tot: total frontal area as viewed by the flow approaching the tube bank (m^2 or ft^2); note that this includes both the pin fin channels and the space occupied by the other channels
b_2: the width between adjacent pin fin channels occupied by the other channels (m or ft)
L: the length in the flow direction (m or ft)
Fluid$: string indicating the fluid type
T_i: inlet temperature of the fluid (K, C, R, or F)
T_o: outlet temperature of the fluid (K, C, R, or F)
P: absolute pressure of the fluid (Pa, kPa, bar. MPa, atm, or psi)
Output
DELTAP: pressure drop (Pa, kPa, bar, MPa, atm, or psi)
Example
$UnitSystem SI Mass J K Pa
$VarInfo h units=W/m^2-K
TypeHX$= 'PF_plain-fin_4645T'
m_dot=0.7 [kg/s]
A_fr_tot=0.5 [m^2]
L=0.1 [m]
Fluid$='Air'
T=300 [K]
T_i=300 [K]
T_o=300 [K]
P=101325 [Pa]
b_2=0.01 [m]
Call chx_dp_pf_plain_fin('PF_plain-fin_20', m_dot, A_fr_tot, b_2, L, Fluid$, T_i, T_o, P: DELTAp)
{Solution:
DELTAp = 2.661 [Pa]}
Related procedures include: