modelGasflow_L1

Ideal gas flow boundary with constant or prescribed power and constant pressure loss
Diagram of Gasflow_L1Open the diagram
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Extends from TransiEnt.Basics.Icons.GasSource (Icon for gas sources).

Information

1. Purpose of model

Ideal boundary model with prescribed or constant enthalpy flow and without fluid volume. Pressure loss is constant and given via parameter.

2. Level of detail, physical effects considered, and physical insight

Constant pressureloss, no fluid volume

3. Limits of validity

Not time dependent because lack of volume

4. Interfaces

TransiEnt.Base.Interfaces.Thermal.gasIn (x2)

RealInput (for specification of boundary power)

5. Nomenclature

(no elements)

6. Governing Equations

First law of thermodynamics

7. Remarks for Usage

(no remarks)

8. Validation

Tested in model TransiEnt.Components.Boundaries.Heat.Check.testHeatflow_L1

Seems that no further testing is necessary because of simplicity of component

9. References

(no remarks)

10. Version History

Model created by Pascal Dubucq (dubucq@tuhh.de) on Mon Aug 18 2014

Parameters

TypeNameDefaultDescription
TILMedia.VLEFluidTypes.BaseVLEFluidMediumsimCenter.gasModel1Medium model
SI.PowerH_flow_const100e3Constant heating Power
Booleanuse_H_flow_infalseUse external Value for H_flow
SI.Pressurep_dropsimCenter.p_nom[2] - simCenter.p_nom[1]Nominal pressure drop

Connectors

TypeNameDefaultDescription
TransiEnt.Basics.Interfaces.Gas.EnthalpyFlowRateInH_flow_setRealInput (for specification of boundary power)
TransiEnt.Basics.Interfaces.Gas.RealGasPortIngasIn
TransiEnt.Basics.Interfaces.Gas.RealGasPortOutgasOut

Components

TypeNameDefaultDescription
Modelica.Units.SI.EnthalpyFlowRateH_ingasIn.m_flow*inStream(gasIn.h_outflow)
Modelica.Units.SI.EnthalpyFlowRateH_outgasIn.m_flow*gasOut.h_outflow