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

Block Controlled Reservoir (IL) It is an endless reservoir of isothermal liquid. Use this block to set the boundary condition in the isothermal liquid network. The liquid in the tank can be under constant pressure – either atmospheric or a preset parameter Reservoir pressure, and also the pressure in the tank can be set using the input signal.

Port A corresponds to the Input to the tank.

If the Controlled pressure option is checked, the pressure in the tank is controlled by the input scalar signal of the P port.

If the checkbox for the Controlled pressure parameter is not set, the pressure is constant and is set using the Reservoir pressure specification and Reservoir pressure parameters, respectively.

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

Assumptions and limitations

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

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

Ports

Undirected

A — tank inlet
Isothermal liquid

The isothermal liquid port corresponds to the Input of the tank.

Input

P — pressure control signal, Pa
scalar

An input signal that determines the pressure value in the tank.

Dependencies

This port is used only if the Controlled pressure parameter is set to Enabled.

Parameters

Controlled — the ability to change the pressure in the tank during the simulation
Turned off | Enabled

Select whether the pressure in the tank can change during the simulation:

  • Turned off — the pressure in the tank remains constant during the simulation. Port P is hidden.

  • Enabled — The input signal on the P port determines the pressure in the tank, which may change during the simulation.

Reservoir pressure specification — method for determining the pressure in the tank
Atmospheric pressure (by default) | Specified pressure

The method of determining the pressure in the tank:

  • Atmospheric pressure — use the atmospheric pressure specified in the unit Isothermal Liquid Properties (IL), connected to the network.

  • Specified pressure — specify the value using the Reservoir pressure parameter.

Dependencies

Enabled if the Controlled pressure parameter is set to Turned off.

Reservoir pressure — the value of the pressure in the tank
0.101325 MPa (by default)

Pressure in the tank. This pressure remains constant during the simulation.

Dependencies

Enabled when the Reservoir pressure specification parameter is set to Specified pressure.

Examples