Engee documentation

Controlled Reservoir (IL)

A reservoir of isothermal liquid at constant or varying pressure.

blockType: AcausalFoundation.IsothermalLiquid.Elements.Reservoir

controlled reservoir (il)

Controlled Reservoir (IL)

Path in the library:

/Physical Modeling/Fundamental/Isothermal Liquid/Elements/Controlled Reservoir (IL)

reservoir (il) 1

Reservoir (IL)

Path in the library:

/Physical Modeling/Fundamental/Isothermal Liquid/Elements/Reservoir (IL)

Description

The block Controlled Reservoir (IL) represents an infinite reservoir of isothermal liquid. Use this block to set the boundary condition in an isothermal liquid network. The fluid in the reservoir can be at a constant pressure, either atmospheric pressure or the Reservoir pressure parameters, and the reservoir pressure can be set using an input signal.

Port A corresponds to the reservoir inlet.

If the Controlled pressure parameter is checked, the reservoir pressure is controlled by the input scalar signal of port P.

If Controlled pressure is unchecked, the pressure is constant and is set using the Reservoir pressure specification and Reservoir pressure parameters respectively.

The unit icon changes depending on the values of the Controlled pressure and Reservoir pressure specification parameters.

Assumptions and limitations

  • The volume of liquid inside the reservoir is assumed to be infinite, so the inlet flow is assumed to be quasi-stationary.

  • There is no resistance between port A and the tank interior.

Ports

Non-directional

A - tank inlet port
isothermal liquid

The isothermal liquid port corresponds to the tank inlet.

Inlet

P - pressure control signal, Pa
scalar

Input signal defining the pressure value in the tank.

Dependencies

This port is only used if the Controlled pressure parameters are set to On.

Parameters

Controlled - possibility to change the pressure in the tank during simulation
Off | On

Select whether the tank pressure can be changed during the simulation:

  • Off - tank pressure remains constant during the simulation. The P port is hidden.

  • On - the input signal on the P port defines the tank pressure that can change during the simulation.

Reservoir pressure specification - method for determining the reservoir pressure
Atmospheric pressure (by default) | Specified pressure.

Method for determining reservoir pressure:

  • Atmospheric pressure - use the atmospheric pressure specified in the Isothermal Liquid Properties (IL) unit connected to the circuit.

  • Specified pressure - specify the value using the Reservoir pressure parameters.

Dependencies

Enabled if the Controlled pressure parameters are set to Disabled.

Reservoir pressure - tank pressure value
`0.101325 MPa (by default).

Reservoir pressure. This pressure remains constant during the simulation.

Dependencies

Turns ON when the Reservoir pressure specification parameters are set to Specified pressure.

Examples