.AixLib.Fluid.Actuators.Valves.ExpansionValves.Utilities.FlowCoefficient .AixLib.Fluid.Actuators.Valves.ExpansionValves.Utilities.FlowCoefficient
This 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 |