modelCarnot_TCon_LowTemperature
Test model for Carnot_TCon with low condenser leaving water temperature
Extends from Examples.Carnot_TCon (Test model for heat pump based on Carnot efficiency and condenser outlet temperature control signal).
Information
This example extends from Buildings.Fluid.HeatPumps.Examples.Carnot_TCon but decreases the set point for the leaving condenser temperature to be below its inlet temperature, in which case the model provides no heating. Towards the end of the simulation, the inlet temperature of the condenser is decreased to be below the evaporator 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_TCon) | -5 | Temperature difference evaporator inlet-outlet |
| Modelica.Units.SI.TemperatureDifference | dTCon_nominal (from Carnot_TCon) | 10 | Temperature difference condenser outlet-inlet |
| Modelica.Units.SI.HeatFlowRate | QCon_flow_nominal (from Carnot_TCon) | 100E3 | Evaporator heat flow rate |
| Modelica.Units.SI.MassFlowRate | m1_flow_nominal (from Carnot_TCon) | QCon_flow_nominal/dTCon_nominal/4200 | Nominal mass flow rate at condenser |
| Modelica.Units.SI.SpecificHeatCapacity | cp2_default (from Carnot_TCon) | Medium2.specificHeatCapacityCp(Medium2.setState_pTX(Medium2.p_default, Medium2.T_default, Medium2.X_default)) | Specific heat capacity of medium 2 at default medium state |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Buildings.Fluid.HeatPumps.Carnot_TCon | heaPum (from Carnot_TCon) | Heat pump | |
| Buildings.Fluid.Sources.MassFlowSource_T | sou1 (from Carnot_TCon) | ||
| Buildings.Fluid.Sources.MassFlowSource_T | sou2 (from Carnot_TCon) | ||
| Modelica.Blocks.Sources.Ramp | TConLvg (from Carnot_TCon) | Control signal for condenser leaving temperature | |
| Modelica.Blocks.Math.Gain | mEva_flow (from Carnot_TCon) | Evaporator mass flow rate | |
| Modelica.Blocks.Math.Add | QEva_flow (from Carnot_TCon) | Evaporator heat flow rate | |
| Buildings.Fluid.Sources.Boundary_pT | sin2 (from Carnot_TCon) | ||
| Buildings.Fluid.Sources.Boundary_pT | sin1 (from Carnot_TCon) | ||
| Modelica.Blocks.Sources.Ramp | TConEnt | Control signal for condenser entering temperature |
Revisions
-
February 10, 2016, by Michael Wetter:
First implementation.