.TransiEnt.Producer.Gas.Electrolyzer.PEMElectrolyzer_L1

Information

1. Purpose of model

This is a model for an electrolyzer with a replaceable efficiency curve and replaceable dynamic behavior.

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

The efficiency curve, the dynamic behaviour and the wanted input (electric power or hydrogen mass flow) can be chosen. The water consumption is calculated using a constant factor.

3. Limits of validity

(no remarks)

4. Interfaces

epp: electric power port, type can be chosen

gasPortOut: hydrogen outlet

P_el_set: input for electric power

m_flow_H2_set: input for hydrogen mass flow

5. Nomenclature

(no elements)

6. Governing Equations

The hydrogen mass flow or the electric power is calculated depending on the given input and chosen efficiency curve and dynamic behavior.

Heat outcoupling is calculated via the efficiency curve and a simplified correlation for heat losses depending on the electrical power, the operating temperature and the ambient temperature. The default value for the temperature coefficient is based on [1].

7. Remarks for Usage

Via parameter 'useLeakageMassFlow' a small mass flow of 'm_flow_small' is always flowing out of gas port (to avoid Zero-Mass-Flow problems).

The model works with any fluids which contain hydrogen as the last component.

8. Validation

Tested in the check models "TransiEnt.Producer.Gas.Electrolyzer.Check.TestPEMElectrolyzer_L1_Charline" and "TransiEnt.Producer.Gas.Electrolyzer.Check.TestPEMElectrolyzer_L1_Dynamics"

9. References

[1] Espinosa-López, M. et al., Modelling and experimental validation of a 46 kW PEM high pressure water electrolyzer, 2018

10. Version History

Model created by Carsten Bode (c.bode@tuhh.de) in March 2017

Model generalized for different electrical power ports by Jan-Peter Heckel (jan.heckel@tuhh.de) in July 2018

Model modified by Oliver Schülting (oliver.schuelting@tuhh.de) on Nov 2018: added useLeakageMassFlow

Model modified by Oliver Schülting (oliver.schuelting@tuhh.de) on Nov 2019: added simplified heat model to simulate thermal losses heat outcoupling

Model adjusted for base class by Jan Westphal (j.westphal@tuhh.de) in dec 2019

Contents

Name	Description
Dynamics	Dynamic behavior of electrolyser
Charline	Calculate the efficiency