I’m looking at the reversible heat pump example found here:
https://www.mathworks.com/help/hydro/ug/ReversibleHeatPumpExample.html
I run the example as-is, and then look at results in Simscape results explorer, focusing on three values calculated within S1: pressure from the Saturation Properties Sensor and enthalpy and entropy from the Thermodynamic Properties Sensor. I then move those plots to a figure and highlight three values at a single time:

The simulink model results give P=0.845676 MPa, H=423.098kJ/kg and S=1.87762kJ/kgK

However, when I use CoolProp within matlab to calculate entropy at the pressure and enthalpy combination I get a different value than given by the saturation properties sensor:
py.CoolProp.CoolProp.PropsSI(‘S’, ‘P’, 0.845676e6, ‘H’, 423.098*1e3, ‘R410A’)/1000

ans =

1.8113

Why is CoolProp giving 1.8113kJ/kgK but the thermodynamic properties sensor is giving 1.87762kJ/kgK?I’m looking at the reversible heat pump example found here:
https://www.mathworks.com/help/hydro/ug/ReversibleHeatPumpExample.html
I run the example as-is, and then look at results in Simscape results explorer, focusing on three values calculated within S1: pressure from the Saturation Properties Sensor and enthalpy and entropy from the Thermodynamic Properties Sensor. I then move those plots to a figure and highlight three values at a single time:

The simulink model results give P=0.845676 MPa, H=423.098kJ/kg and S=1.87762kJ/kgK

However, when I use CoolProp within matlab to calculate entropy at the pressure and enthalpy combination I get a different value than given by the saturation properties sensor:
py.CoolProp.CoolProp.PropsSI(‘S’, ‘P’, 0.845676e6, ‘H’, 423.098*1e3, ‘R410A’)/1000

ans =

1.8113

Why is CoolProp giving 1.8113kJ/kgK but the thermodynamic properties sensor is giving 1.87762kJ/kgK? I’m looking at the reversible heat pump example found here:
https://www.mathworks.com/help/hydro/ug/ReversibleHeatPumpExample.html
I run the example as-is, and then look at results in Simscape results explorer, focusing on three values calculated within S1: pressure from the Saturation Properties Sensor and enthalpy and entropy from the Thermodynamic Properties Sensor. I then move those plots to a figure and highlight three values at a single time:

The simulink model results give P=0.845676 MPa, H=423.098kJ/kg and S=1.87762kJ/kgK

However, when I use CoolProp within matlab to calculate entropy at the pressure and enthalpy combination I get a different value than given by the saturation properties sensor:
py.CoolProp.CoolProp.PropsSI(‘S’, ‘P’, 0.845676e6, ‘H’, 423.098*1e3, ‘R410A’)/1000

ans =

1.8113

Why is CoolProp giving 1.8113kJ/kgK but the thermodynamic properties sensor is giving 1.87762kJ/kgK? simulink, fluid properties, saturation properties sensor, entropy MATLAB Answers — New Questions

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