Contents
- Index
K_extract_tee
The K_extract_tee(V1overV3) function returns the resistance coefficient for an extract duct with two tee ducts of equal area. The coefficient returned is for the duct 1 and should be applied to the downstream duct velocity. The coefficient is a function of the branch 1 to downstream volumetric flow rates. The correlation is for circular ducts. Note that the function DuctExtractTee_CL in the component library implements the dimensional version of this function.
Inputs:
V1overV3 = ratio of duct 1 to upstream flow rates
Example:
$UnitSystem SI C kPa Degree
$VarInfo DELTAP units=Pa
$VarInfo rho units=kg/m^3
V1overV3=0.4
K=k_extract_tee(V1overV3)
vel = 10 [m/s]
P = Po#
T = 20 [C]
F$ = 'Air'
rho=density(F$,P=P,T=T)
DELTAP = rho*vel^2/2*K
{Solution:
DELTAP=7.852 [Pa]
K=0.1259
}
Reference:
Legg, R., 2017, "Chapter 14: Ducted Air Systems" in Air Conditioning System Design, Butterworth-Heinemann
Minor Losses Index