Finned flat tubes h
The procedure:
CHX_h_Finned_Flat_Tube(TypeHX$, m_dot, A_fr, Fluid$, T, P:h)
provides the heat transfer coefficient associated with a finned flat tube compact heat exchanger surface. These data are from Kays and London (1994).
Inputs
TypeHX$: string identifying the geometry
FF-9.68-0.87 : 'ff_tubes_s968_087'
FF-9.1-0.737-S : 'ff_tubes_s91_0737_s'
FF-9.68-0.87-R : 'ff_tubes_s968_087_r'
FF-9.29-0.737-SR : 'ff_tubes_s929_0737_sr'
FF-11.32-0.737-SR : 'ff_tubes_s1132_0737_sr'
m_dot: mass flow rate (kg/s or lbm/hr)
A_fr: frontal area as viewed by the flow approaching the tube bank (m^2 or ft^2)
Fluid$: string indicating the fluid type
T: temperature of the fluid (K, C, R, or F)
P: absolute pressure of the fluid (Pa, kPa, bar. MPa, atm, or psi)
Output
h: heat transfer coefficient (W/m^2-K or Btu/hr-ft^2-R)
Example
$UnitSystem SI Mass J K Pa
$VarInfo h units=W/m^2-K
TypeHX$='ff_tubes_s968_087_R'
m_dot=0.7 [kg/s]
A_fr=0.1 [m^2]
L=1 [m]
Fluid$='Air'
T=300 [K]
T_i=300 [K]
T_o=300 [K]
P=101325 [Pa]
Call chx_h_finned_flat_tube(TypeHX$, m_dot, A_fr, Fluid$, T, P:h)
{Solution:
h = 77.09 [W/m^2-K]}
Related procedures include: