.AixLib.Fluid.Actuators.Valves.ExpansionValves.Utilities.FlowCoefficient .AixLib.Fluid.Actuators.Valves.ExpansionValves.Utilities.FlowCoefficientThis package contains models describing calculations procedures
of flow coefficients that are based on a literature review.
However, in this package the flow coefficient is implemented in
such a way that it fulfills
ṁ = C*Avalve*sqrt(2*ρinlet*dp)
.
For more information, please checkout
AixLib.Fluid.Actuators.Valves.ExpansionValves.BaseClasses.PartialExpansionValve.
Calculation procedures presented in the litarture have some
variables in commen and these variables are presented
below:
| Variable | Comment |
|---|---|
A |
Cross-sectional flow area |
dinlet |
Diameter of the pipe at valve's inlet |
pinlet |
Pressure at valve's inlet |
poutlet |
Pressure at valve's outlet |
ρinlet |
Density at valve's inlet |
ρoutlet |
Density at valve's outlet |
Tinlet |
Temperature at valve's inlet |
μinlet |
Dynamic viscosity at valve's inlet |
σinlet |
Surface tension at valve's inlet |
Coutlet |
Specific heat capacity at valve's outlet |
hfg |
Heat of vaparisation |
Moreover, two approaches can be identified in general: A polynomial and a power approach. The characteristics of these approaches are presented below.
A generic polynomial approach is presented below:
C = corFact * sum(a[i]*P[i]^b[i] for i in 1:nT)
Actually, two polynomial approaches are implemented in this
package.
A generic power approach is presented below:
C = corFact * a * product(P[i]^b[i] for i in
1:nT)
Actually, thee power approaches are implemented in this
package.
X. Zhifang, S. Lin and O. Hongfei. (2008): Refrigerant flow characteristics of electronic expansion valve based on thermodynamic analysis and experiment. In: Applied Thermal Engineering 28(2), S. 238–243
Q. Ye, J. Chen and Z. Chen. (2007): Experimental investigation of R407c and R410a flow through electronic expansion valve. In: Energy Conversion andManagement 48(5), S. 1624–1630
| Name | Description |
|---|---|
 PolynomialFlowCoefficient |
Model describing flow coefficient based on polynomial approach |
 PowerFlowCoefficient |
Model describing flow coefficient based on power approach |
 SpecifiedFlowCoefficients |
Package that cointains flow coefficients that are specified |