.TransiEnt.Components.Gas.VolumesValvesFittings.Fittings.RealGasJunction_L2

Information

1. Purpose of model

This model represents a junction for real gases. It is a modified version of the model ClaRa.Components.VolumesValvesFittings.Fittings.FlueGasJunction_L2 from ClaRa version 1.3.0. The model is documented there and here only the changes are described.

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

The two-phase region is deactivated. Pressure losses at the ports have been added. A simplified equation for constant composition can be used to improve simulation speed. Also, a heat port is added with which heat transfer can be integrated. You can choose a quasi-stationary or dynamic mass balance implementations. Additionally, the parameter variableCompositionEntries can be used in case that not all components are freely variable, e.g. when hydrogen is fed into natural gas.

3. Limits of validity

Only valid for real gases without phase change.

4. Interfaces

gasPort1: inlet for gas

gasPort2: inlet for gas

gasPort3: outlet for gas

eye1: outlet

eye2: outlet

heat: heat port

5. Nomenclature

(no elements)

6. Governing Equations

(no remarks)

7. Remarks for Usage

(no remarks)

8. Validation

(no remarks)

9. References

(no remarks)

10. Version History

Created by Christopher Helbig (christopher.helbig@tuhh.de), Nov 2014

Modified by Lisa Andresen (andresen@tuhh.de), Feb 2015

Edited by Carsten Bode (c.bode@tuhh.de), Apr 2016

Revised by Carsten Bode (c.bode@tuhh.de) in Apr 2018 (updated to new ClaRa version 1.3.0)

Modified by Carsten Bode (c.bode@tuhh.de), Feb 2019 (added temperature start value)

Modified by Carsten Bode (c.bode@tuhh.de), Mar 2019 (added pressure losses)

Modified by Carsten Bode (c.bode@tuhh.de), May 2019 (added simplified equation for constant composition)

Modified by Carsten Bode (c.bode@tuhh.de), Sep 2019 (added heat port)

Modified by Carsten Bode (c.bode@tuhh.de), May 2020 (added quasi-stationary equations and simplified equations for only dependent mass fractions)

Contents

Name	Description
PressureLoss1	Pressure loss model at gasPort1
PressureLoss2	Pressure loss model at gasPort2
PressureLoss3	Pressure loss model at gasPort3