Scicos Block
fr - eng

Thermal-hydraulic control valve

Contents

• Thermal-hydraulic control valve
  • Palette
  • Description
  • Dialog box
  • Default properties
  • Interfacing function
  • Modelica model

Palette

• ThermoHydraulics.cosf - Thermal-Hydraulics toolbox

Description

The VanneReglante block represents a variable orifice control valve. The flow rate through the valve is proportional to the valve opening, i.e.,

$$\Delta P \times h\times\left\vert h \right\vert = k\times Q\times \left\vert Q\right\vert$$

where $h$ is the valve opening, $\Delta P$ is the pressure difference, and $Q$ is the flow rate. This model is only used for the laminar flow regimes. $k$ is a constant depending on the valve geometry and mass density of fluid.

Dialog box

• Cvmax
  Cvmax (maximum opening of the valve)
  Properties : Type 'vec' of size -1.

• p_rho
  Fluid density
  Properties : Type 'vec' of size -1.

Default properties

• Inputs :
  • Modelica variable name : 'C1'
    Implicit variable.

  • Modelica variable name : 'Ouv'
    Explicit variable.

• Outputs :
  • Modelica variable name : 'C2'
    Implicit variable.

• Parameters :
  • Modelica parameter name : 'Cvmax'
    Default value : 8005.42
    Is a state variable : no.

  • Modelica parameter name : 'p_rho'
    Default value : 0
    Is a state variable : no.

• File name of the model : VanneReglante

Interfacing function

• SCI/macros/scicos_blocks/ModHydraulics/VanneReglante.sci [view code]

Modelica model

• SCI/macros/scicos_blocks/ModHydraulics/Hydraulics.mo [view code]