Contents
CapTube1_CL
CapTube1_CL determines the mass flow rate through a capillary tube using the empirical relation published in the ASHRAE 2014 Refrigeration Handbook, Chapter 11, Capillary Tubes.
Inputs:
R$: name of the refrigerant
d: inner diameter of the capillary tube (m, ft)
L: length of the capillary tube (m, ft)
P_in: pressure at the capillary tube inlet (Pa, kPa, MPa, bar, psia, atm)
h_in: specific enthalpy at the capillary tube inlet (J/kg, kJ/kg, Btu/lbm)
Output:
m_dot: mass flow rate (kg/s, lbm/hr)
Example:
$Unitsystem SI C kPa kJ mass
R$='R134a'
d=1.1 [mm]*convert(mm,m)
L=3.0 [m]
P_in=1.4 [MPa]*convert(MPa,kPa)
T_sat=temperature(R$,P=P_in,x=0)
DELTAT_sc=15 [DELTAK]
h_in=enthalpy(R$,P=P_in, T=T_sat-DELTAT_sc)
Call CapTube1_CL(R$,d, L, P_in, h_in : m_dot)
m_dot_hr=m_dot*convert(kg/s,kg/hr)
{Solution:
m_dot=0.0042 [kg/s]
m_dot_hr=15.12 [kg/hr]
}
Index