Buildings.Fluid.BaseClasses.FlowModels.Examples

Information

This package contains examples for the use of models that can be found in Buildings.Fluid.BaseClasses.FlowModels.

Extends from Modelica.Icons.ExamplesPackage (Icon for packages containing runnable examples).

Package Content

Name	Description
TestFlowFunctions	Test model for flow functions

Buildings.Fluid.BaseClasses.FlowModels.Examples.TestFlowFunctions

Information

Extends from Modelica.Icons.Example (Icon for runnable examples).

Parameters

Type	Name	Default	Description
Pressure	p2	101325	Boundary condition [Pa]
Boolean	from_dp	true
Real	k	0.5
MassFlowRate	m_flow_nominal	1	Nominal flow rate [kg/s]

Modelica definition

model TestFlowFunctions "Test model for flow functions"
  extends Modelica.Icons.Example;
 Modelica.SIunits.MassFlowRate m1_flow;
 Modelica.SIunits.MassFlowRate m2_flow;
 Modelica.SIunits.Pressure dp1;
 Modelica.SIunits.Pressure dp2;
 Modelica.SIunits.Pressure p1_nominal=101325;
 Modelica.SIunits.Time dTime= 1;
 Modelica.SIunits.Pressure p1 "Boundary condition";
 parameter Modelica.SIunits.Pressure p2 = 101325 "Boundary condition";
 parameter Boolean from_dp = true;
 parameter Real k = 0.5;
 parameter Modelica.SIunits.MassFlowRate m_flow_nominal = 1 "Nominal flow rate";
equation 
  p1 = p1_nominal + (time-0.5)/dTime * 20;
  m1_flow = m2_flow;
  p2-p1 = dp1 + dp2;
  if from_dp then
  m1_flow=FlowModels.basicFlowFunction_dp(dp=dp1, k=k, m_flow_turbulent=m_flow_nominal*0.3);
  m2_flow=FlowModels.basicFlowFunction_dp(dp=dp2, k=k, m_flow_turbulent=m_flow_nominal*0.3);
  else
  dp1=FlowModels.basicFlowFunction_m_flow(m_flow=m1_flow, k=k, m_flow_turbulent=m_flow_nominal*0.3);
  dp2=FlowModels.basicFlowFunction_m_flow(m_flow=m2_flow, k=k, m_flow_turbulent=m_flow_nominal*0.3);
  end if;
  assert(abs(dp1-dp2) < 1E-5, "Error in implementation.");
end TestFlowFunctions;