modelBuck_R22R407CR410A_EEV_15_22
Buckingham - Similitude for R22, R407C, R410A - EEV - 1.5 mm to 2.2 mm
Extends from PowerFlowCoefficient (Model describing flow coefficient based on power approach).
Information
This model contains a calculation procedure for flow coefficients
presented by Shanwei et al. (2005).
| Reference | Formula | Refrigerants |
Validity Tcondensing
|
Validity Tevaporating
|
Validity Tsubcooling
|
|---|---|---|---|---|---|
| ShanweiEtAl2005 |
C = a * a * (A/dclearance^2)^b1 *
((pinlet-poutlet)/pcrit)^b2
* (Tcrit/Tsubcooling)^b3 *
(rhoinlet/rhooutlet)^b4 *
(quality)^b5
|
R22, R407C, R410A
|
40 - 50 °C
|
0 - 10 °C
|
1.5 - 10 °C
|
References
M. Shanwei, Z. Chuan, C. Jiangping and C. Zhiujiu. (2005): Experimental research on refrigerant mass flow coefficient of electronic expansion valve. In: Applied Thermal Engineering 25(14), S. 2351–2366
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelling approach | |||
| Types.PowerModels | powMod (from PowerFlowCoefficient) | Types.PowerModels.ShanweiEtAl2005 | Chose predefined power model for flow coefficient |
| Real | a (from PowerFlowCoefficient) | Multiplication factor for generic power approach | |
| Real[:] | b (from PowerFlowCoefficient) | Exponents for each multiplier | |
| Integer | nT (from PowerFlowCoefficient) | size(b, 1) | Number of terms used for the calculation procedure |
| Further geometry data | |||
| Modelica.Units.SI.Diameter | dCle (from PowerFlowCoefficient) | 0.02e-3 | Clearance diameter dCle = d_inner - d_needle |
| Real | pDifRat (from PowerFlowCoefficient) | 0.84 | Pressure differential ratio factor depending on valve moddeld |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Real | opening (from PartialFlowCoefficient) | Current valve's opening | |
| Modelica.Units.SI.Area | AVal (from PartialFlowCoefficient) | Cross-sectional area of the expansion valve | |
| Modelica.Units.SI.Diameter | dInlPip (from PartialFlowCoefficient) | Diameter of the pipe at valve's inlet | |
| Medium.ThermodynamicState | staInl (from PartialFlowCoefficient) | Thermodynamic state at valve's inlet conditions | |
| Medium.ThermodynamicState | staOut (from PartialFlowCoefficient) | Thermodynamic state at valve's outlet conditions | |
| Modelica.Units.SI.AbsolutePressure | pInl (from PartialFlowCoefficient) | Pressure at valves's inlet conditions | |
| Modelica.Units.SI.AbsolutePressure | pOut (from PartialFlowCoefficient) | Pressure at valves's outlet conditions | |
| Real | C (from PartialFlowCoefficient) | Mass flow coefficient used for expansion valves | |
| Real[nT] | P (from PowerFlowCoefficient) | Array that contains all coefficients used for the calculation procedure | |
| Real | corFact (from PowerFlowCoefficient) | Corraction factor used to correct flow coefficient |
Revisions
- October 16, 2017, by Mirko Engelpracht:
First implementation (see issue 457).