modelRadiator
Extends from BaseClasses.BaseDemand.
Information
This demand model uses a radiator model based on the standard EN 442 to calculate the return temperature as a function of supply temperature and room temperature.
Parameters
| Type | Name | Default | Description |
|---|
| Boolean | show_radiator (from BaseDemand) | false | |
| Modelica.SIunits.Temperature | TemRoom | 21.0 + 273.15 | Room temperature at nominal condition |
| Integer | nEle | 5 | Number of elements used in the discretization |
| Real | fraRad | 0.35 | Fraction radiant heat transfer |
| Real | n | 1.3 | Heat transfer exponent |
| Assumptions |
| Boolean | allowFlowReversal (from PartialTwoPort) | true | = false to simplify equations, assuming, but not enforcing, no flow reversal |
| Nominal condition |
| Modelica.SIunits.MassFlowRate | m_flow_nominal (from PartialTwoPortInterface) | | Nominal mass flow rate |
| Modelica.SIunits.Power | Q_flow_nominal (from BaseDemand) | | Nominal heat flow rate |
| Modelica.SIunits.Temperature | TemSup_nominal (from BaseDemand) | 60.0 + 273.15 | Nominal supply temperature |
| Modelica.SIunits.Temperature | TemRet_nominal (from BaseDemand) | 35.0 + 273.15 | Nominal return temperature |
| Advanced |
| Modelica.SIunits.MassFlowRate | m_flow_small (from PartialTwoPortInterface) | 1E-4*abs(m_flow_nominal) | Small mass flow rate for regularization of zero flow |
| Advanced › Diagnostics |
| Boolean | show_T (from PartialTwoPortInterface) | false | = true, if actual temperature at port is computed |
Components
| Type | Name | Default | Description |
|---|
| Modelica.SIunits.MassFlowRate | m_flow (from PartialTwoPortInterface) | port_a.m_flow | Mass flow rate from port_a to port_b (m_flow > 0 is design flow direction) |
| Modelica.SIunits.PressureDifference | dp (from PartialTwoPortInterface) | port_a.p - port_b.p | Pressure difference between port_a and port_b |
| Medium.ThermodynamicState | sta_a (from PartialTwoPortInterface) | Medium.setState_phX(port_a.p, noEvent(actualStream(port_a.h_outflow)), noEvent(actualStream(port_a.Xi_outflow))) | Medium properties in port_a |
| Medium.ThermodynamicState | sta_b (from PartialTwoPortInterface) | Medium.setState_phX(port_b.p, noEvent(actualStream(port_b.h_outflow)), noEvent(actualStream(port_b.Xi_outflow))) | Medium properties in port_b |
Revisions
- Feburary 27, 2019, by Benedikt Leitner:
Implementation and added User's guide.
