modelCarnot_TEva_HighTemperature
Test model for Carnot_TEva with high evaporator temperature
Extends from Examples.Carnot_TEva (Test model for chiller based on Carnot efficiency and evaporator outlet temperature control signal).
Information
This example extends from Buildings.Fluid.Chillers.Examples.Carnot_TEva but increases the set point for the leaving evaporator temperature to be above its inlet temperature, in which case the model provides no cooling. Towards the end of the simulation, the inlet temperature of the evaporator is increased to be above the condenser temperature. In this domain, the model requires cooling again. While this is not a meaningful operating point for the model, the example verifies that it robustly simulates this regime.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.TemperatureDifference | dTEva_nominal (from Carnot_TEva) | -10 | Temperature difference evaporator outlet-inlet |
| Modelica.Units.SI.TemperatureDifference | dTCon_nominal (from Carnot_TEva) | 10 | Temperature difference condenser outlet-inlet |
| Real | COPc_nominal (from Carnot_TEva) | 3 | Chiller COP |
| Modelica.Units.SI.HeatFlowRate | QEva_flow_nominal (from Carnot_TEva) | -100E3 | Evaporator heat flow rate |
| Modelica.Units.SI.MassFlowRate | m2_flow_nominal (from Carnot_TEva) | QEva_flow_nominal/dTEva_nominal/4200 | Nominal mass flow rate at chilled water side |
| Modelica.Units.SI.SpecificHeatCapacity | cp1_default (from Carnot_TEva) | Medium1.specificHeatCapacityCp(Medium1.setState_pTX(Medium1.p_default, Medium1.T_default, Medium1.X_default)) | Specific heat capacity of medium 1 at default medium state |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Fluid.Chillers.Carnot_TEva | chi (from Carnot_TEva) | Chiller model | |
| Buildings.Fluid.Sources.MassFlowSource_T | sou1 (from Carnot_TEva) | ||
| Buildings.Fluid.Sources.MassFlowSource_T | sou2 (from Carnot_TEva) | ||
| Buildings.Fluid.Sources.Boundary_pT | sin1 (from Carnot_TEva) | ||
| Buildings.Fluid.Sources.Boundary_pT | sin2 (from Carnot_TEva) | ||
| Modelica.Blocks.Sources.Ramp | TEvaLvg (from Carnot_TEva) | Control signal for evaporator leaving temperature | |
| Modelica.Blocks.Math.Gain | mCon_flow (from Carnot_TEva) | Condenser mass flow rate | |
| Modelica.Blocks.Math.Add | QCon_flow (from Carnot_TEva) | Condenser heat flow rate | |
| Modelica.Blocks.Sources.Ramp | TEvaEnt | Control signal for evaporator entering temperature |
Revisions
-
February 10, 2016, by Michael Wetter:
First implementation.