Reservoir (G)
Boundary conditions for a gas network at constant pressure and temperature.
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Description
The Reservoir (G) unit represents an infinite reservoir at fixed pressure and temperature. The reservoir and its inlet can be at atmospheric or set pressure. Port A corresponds to the reservoir inlet.
The volume of gas inside the reservoir is assumed to be infinite, so the flow is assumed to be quasi-stationary.
The gas enters and leaves the tank at the pressure given for the tank, but its temperature is determined by the direction of gas flow. If the gas enters the tank, its temperature is determined by the incoming gas network, then the tank acts as a heat sink. If the gas exits the tank, its temperature is equal to the tank temperature and the tank acts as a heat source.
This unit also acts as a reference point for pressure and temperature measurements in the gas network. These measurements refer to the pressure and temperature inside the tank respectively. Connect the tank to port B of the Pressure & Temperature Sensor (G) unit to measure the relative pressure and temperature of the node connected to port A of the sensor.
Parameters
Reservoir pressure specification - selection of pressure specification method
Atmospheric pressure (by default) | Specified pressure
Select the pressure setting method:
-
Atmospheric pressure- the atmospheric pressure set by the Gas Properties (G) block connected to the gas circuit is used. -
Specified pressure- the value of the Reservoir pressure parameter is used.
Reservoir pressure - pressure in the reservoir
`101325.0 Pa (by default).
Enter the desired reservoir pressure. This pressure remains constant throughout the simulation.
Dependencies
Enabled if Reservoir pressure specification is set to Specified pressure.
Reservoir temperature - temperature in the tank
`293.15 K (by default).
Sets the temperature in the reservoir. This temperature remains constant for the duration of the simulation.
Cross-sectional area at port A - area normal to the direction of flow at the tank inlet
0.01 m² (by default)
The cross-sectional area of the tank inlet in the direction normal to the gas flow path.