modelHeader
Header with metal walls for gas flows
Extends from Icons.Gas.Mixer.
Information
This model describes a constant volume buffer with metal walls. The metal wall temperature and the heat transfer coefficient between the wall and the fluid are uniform. The wall is thermally insulated from the outside.
If the inlet or the outlet are connected to a bank of tubes, the model can actually represent a collector or a distributor.
Modelling options
The actual gas used in the component is determined by the replaceable Medium package. In the case of multiple component, variable composition gases, the start composition is given by Xstart, whose default value is Medium.reference_X .
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Medium.Temperature | Tmstart | 300 | Metal wall start temperature |
| SI.Volume | V | Inner volume | |
| SI.Area | S | 0 | Inner surface |
| SI.CoefficientOfHeatTransfer | gamma | 0 | Heat Transfer Coefficient |
| SI.HeatCapacity | Cm | 0 | Metal Heat Capacity |
| Boolean | allowFlowReversal | system.allowFlowReversal | = true to allow flow reversal, false restricts to design direction |
| Initialisation | |||
| Medium.AbsolutePressure | pstart | 1e5 | Pressure start value |
| Medium.Temperature | Tstart | 300 | Temperature start value |
| Medium.MassFraction[Medium.nX] | Xstart | Medium.reference_X | Start gas composition |
| Choices.Init.Options | initOpt | system.initOpt | Initialisation option |
| Boolean | noInitialPressure | false | Remove initial equation on pressure |
| Boolean | noInitialTemperature | false | Remove initial equation on temperature |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| FlangeA | inlet | ||
| FlangeB | outlet | ||
| Thermal.HT | thermalPort |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Medium.BaseProperties | gas | ||
| ThermoPower.System | system | System wide properties | |
| SI.Mass | M | Gas total mass | |
| SI.InternalEnergy | E | Gas total energy | |
| Medium.SpecificEnthalpy | hi | Inlet specific enthalpy | |
| Medium.SpecificEnthalpy | ho | Outlet specific enthalpy | |
| Medium.MassFraction[Medium.nXi] | Xi_i | Inlet composition | |
| Medium.MassFraction[Medium.nXi] | Xi_o | Outlet composition | |
| SI.Temperature | Tm | Wall temperature | |
| SI.Time | Tr | Residence Time |
Contents
| Name | Description |
|---|---|
 Medium |
Revisions
- 30 May 2005
by Francesco Casella:
Initialisation support added. - 19 Nov 2004
by Francesco Casella:
Adapted to Modelica.Media. - 5 Mar 2004
by Francesco Casella:
First release.