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Finned circular tubes h

 

 

The procedure: 

 

CHX_h_Finned_Circular_Tube(TypeHX$, m_dot, A_fr, Fluid$, T, P:h)

 

provides the heat transfer coefficient associated with a finned circular tube compact heat exchanger surface.  These data are from Kays and London (1994).

 

Inputs

TypeHX$: string identifying the geometry 

 CF-7.34 : 'fc_tubes_sCF-734'  

 CF-8.72 : 'fc_tubes_sCF-872'  

 CF-8.72(c) : 'fc_tubes_sCF-872c'  

 CF-7.0-5/8J : 'fc_tubes_sCF-70-58J'  

 CF-8.7-5/8J(a) : 'fc_tubes_sCF-87-58Ja'  

 CF-8.7-5/8J(b) : 'fc_tubes_sCF-87-58Jb'  

 CF-9.05-3/4J(a) : 'fc_tubes_sCF-905-34Ja'  

 CF-9.05-3/4J(b) : 'fc_tubes_sCF-905-34Jb'  

 CF-9.05-3/4J(c) : 'fc_tubes_sCF-905-34Jc'  

 CF-9.05-3/4J(d) : 'fc_tubes_sCF-905-34Jd'  

 CF-9.05-3/4J(e) : 'fc_tubes_sCF-905-34Je'  

 CF-8.8-1.0J(a) : 'fc_tubes_sCF-88-10Ja'  

 CF-8.8-1.0J(b) : 'fc_tubes_sCF-88-10Jb'  

 8.0-3/8T : 'fc_tubes_80-38T'

 7.75-5/8T : 'fc_tubes_775-58T'

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 

TypeHX$='fc_tubes_sCF-88-10Jb'

m_dot=0.7 [kg/s]

A_fr=0.1 [m^2]

L=1 [m]

Fluid$='Air'

T=300 [K]

P=101325 [Pa]

Call chx_h_finned_circular_tube(TypeHX$, m_dot, A_fr, Fluid$, T, P:h)

 

{Solution is:

h = 91.93 [W/m^2-K]}

 

Related procedures include:

Geometry Functions

Nondimensional Functions

Pressure Drop