modelCarnot_TEva_2ndLaw

Test model to verify that the 2nd law is not violated

Extends from Modelica.Icons.Example (Icon for runnable examples).

Information

This example verifies that the 2nd law of thermodynamics is not violated despite of a very small temperature lift.

Type	Name	Default	Description
Modelica.Units.SI.TemperatureDifference	dTEva_nominal	-4	Temperature difference evaporator outlet-inlet
Modelica.Units.SI.TemperatureDifference	dTCon_nominal	4	Temperature difference condenser outlet-inlet
Real	COPc_nominal	3	Chiller COP
Modelica.Units.SI.HeatFlowRate	QEva_flow_nominal	-100E3	Evaporator heat flow rate
Modelica.Units.SI.MassFlowRate	m2_flow_nominal	QEva_flow_nominal/dTEva_nominal/4200	Nominal mass flow rate at chilled water side
Modelica.Units.SI.MassFlowRate	m1_flow_nominal	-m2_flow_nominal/dTCon_nominal*dTEva_nominal	Nominal mass flow rate at condenser water side

Type	Name	Description
Modelica.Blocks.Sources.Constant	TEvaIn	Evaporator inlet temperature
Modelica.Blocks.Sources.Constant	dTEva	Temperature difference over evaporator
Modelica.Blocks.Math.Add	TSetEvaLvg	Set point for evaporator leaving temperature
Modelica.Blocks.Sources.Ramp	dTConEva	Temperature lift condenser inlet minus evaporator outlet
Modelica.Blocks.Math.Add	TConIn	Condenser inlet temperature
Chiller	chi_b	Chiller model that uses port_b to compute Carnot efficiency

Name	Description
Medium	Medium model
Chillerprotected	Subsystem model with the chiller

February 10, 2023, by Michael Wetter:
Removed binding of parameter with same value as the default.
This is for #1692.
May 15, 2019, by Jianjun Hu:
Replaced fluid source. This is for #1072.
January 9, 2017, by Michael Wetter:
Renamed internal protected class Chiller to be upper-case.
January 3, 2017, by Michael Wetter:
Updated model because the option to use the inlet temperatures to compute the COP has been removed.
November 18, 2016, by Michael Wetter:
First implementation.