.TransiEnt.Grid.Gas.Controller.MaxH2MassFlow_phi

Information

1. Purpose of model

Model for determination of permitted maximum additional hydrogen mass flow in analyzed natural gas flow.

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

3. Limits of validity

4. Interfaces

• Two inputs: gas inlet and gas outlet
• One output: signal output of maximum permitted hydrogen mass flow

5. Nomenclature

• : volume fraction
• : weight fraction
• STP: standard temperature and pressure (Tstp=273.15 K, pstp=1.01325 bar)
• NG: gas mixture before feedin
• NGH2: gas mixture after feedin
• H2inNG: hydrogen in gas mixture before feedin

6. Governing Equations

Isenthalpic, no chemical reactions, no pressure losses, conservation of mass.

Mass balances for feedin point:

The same for volume balances plus the relation between mass and volume:

gives the stated relations.

7. Remarks for Usage

Hydrogen has to be the last entry of medium column vector.

8. Validation

Tested in check model "TransiEnt.Consumer.Gas.Check.GasDemandVarH2_varGCV_controlMFlow"

9. References

10. Version History

Model created by Christopher Helbig, Dec 2014

Model edited and revised by by Lisa Andresen (andresen@tuhh.de), Jul 2016