modelPEMElectrolyzer_L2

Information

1. Purpose of model

This model electrolyzer uses modular physics classes and a Specification record to describe a real-life electrolyzer system. The default model uses physical relationships taken from (Espinosa-López et al, 2018).

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

The user can select or create a model with system specific parameters. The desired input (electric power, current, current density or hydrogen mass flow) can be varied. Physics submodels can be replaced as desired, with essential definitions annotated. The water consumption, hydrogen output, and net- and gross-calorific energy conversion efficiency can be calculated. The user has the option of controlling pressure through gasPortOut and/or temperature through T_input as well.

3. Limits of validity

Original model developed and validated in the range of 20-60 °C with operating pressure of 15-35 bar.

4. Interfaces

epp: electric power port, type can be chosen

gasPortOut: hydrogen outlet

i_dens_set: input for electric current density

i_el_stack_set: input for electric current

P_el_set: input for electric power

m_flow_H2_set: input for hydrogen mass flow

T_input: input for temperature

excessHeatFlowOut: Heat flow rate out port, equal to the cooling power used to regulate temperature at max temp.

temperatureOut: temperatureOut interface equal to operating temperature

5. Nomenclature

(no elements)

6. Governing Equations

Selectable physics equations allow for different governing equations to be used, and consist of equations from (Espinosa-López et al, 2018) by default.

7. Remarks for Usage

(no remarks)

8. Validation

Results have been validated against (Espinosa-López et al, 2018) published figures.

9. References

[1] Manuel Espinosa-López, Philippe Baucour, Serge Besse, Christophe Darras, Raynal Glises, Philippe Poggi, André Rakotondrainibe, and Pierre Serre-Combe. Modelling and experimental validation of a 46 kW PEM high pressure water electrolyser. Renewable Energy, 119, pp. 160-173, 2018. doi: 10.1016/J.RENENE.2017.11.081.

[2] efficiency curve of the inverter taken from the data sheet of SMA "Technische Wirkungsgrade und Derating" URL: https://files.sma.de/dl/1348/WirkungDerat-TI-de-46.pdf page 71, 26.11.2019

[3] J. Webster and C. Bode, “Implementation of a Non-Discretized Multiphysics PEM Electrolyzer Model in Modelica,” in Proceedings of the 13th International Modelica Conference, Regensburg, Germany, March 4–6, 2019, no. 157, pp. 833–840, DOI: 10.3384/ecp19157833.

10. Version History

Model created by John Webster (jcwebste@edu.uwaterloo.ca) in October 2018

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

Parameters

Connectors

Components

Contents

Name	Description
Outline
Summary
electrolyzerVoltage
electrolyzerTemperature
electrolyzerPressures
electrolyzerMassFlow