.TransiEnt.Producer.Gas.Electrolyzer.Systems.FeedInStation_Storage

Information

1. Purpose of model

This model represents a feed in station where hydrogen is produced with an electrolyzer, stored in an adiabatic storage and fed into a natural gas grid. The storage can by bypassed and the hydrogen is fed directly into the grid.

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

see sub models

3. Limits of validity

Only valid for negligible heat transfer from the storage to the surroundings, for everything else, see sub models.

4. Interfaces

P_el_set: input for the set value for the electric power

m_flow_feedIn: input for the possible feed-in mass flow into the natural grid etc.

epp: electric power port for the electrolyzer

gasPortOut: outlet of the hydrogen

5. Nomenclature

(no elements)

6. Governing Equations

(no remarks)

7. Remarks for Usage

For start up, a small hydrogen mass flow for the electrolyzer can be set to allow for simpler initialisation.

Constant mass flow 'm_flow_hydrogenDemand_constant' is pulled from hydrogen storage if storage pressure is above p_min_Low_constantDemand. If pressure falls below 'p_minLow' hydrogen in storage is only used for supply of 'm_flow_hydrogenDemand_constant' and no more hydrogen can be fed in.

8. Validation

Tested in check model "TransiEnt.Producer.Gas.Electrolyzer.Systems.Check.Test_FeedInStation_Storage"

9. References

(no remarks)

10. Version History

Model created by Lisa Andresen (andresen@tuhh.de) in September 2016

Model revised by Carsten Bode (c.bode@tuhh.de) in Apr 2018 (fixed for update to ClaRa 1.3.0)

Model modified by Oliver Schülting (oliver.schuelting@tuhh.de) in Mar 2020: added boundary for constant internal hydrogen demand

Model modified by Carsten Bode (c.bode@tuhh.de) in May 2020: added option to use isothermal junction

Contents

Name	Description
Charline	Calculate the efficiency
Dynamics	Dynamic behavior of electrolyser
PressureLossAtOutlet	Pressure loss at outlet (can help reducing the system of equations)
CostSpecsElectrolyzer	Cost configuration electrolyzer
CostSpecsStorage	Cost configuration storage