modelPressures1
Extends from TransiEnt.Producer.Gas.Electrolyzer.Base.Physics.Pressures.PartialPressures (partial model for PEM electrolyzer pressures).
Information
1. Purpose of model
This is a model to calculate varying pressures for electrolyzer dynamics.
2. Level of detail, physical effects considered, and physical insight
Pressure is modeled using empirical expression for H2O partial pressure and Dalton's Law of partial pressures for O2 and H2. Dependent on operating temperature T_op, cathode and anode side storage tank pressures.
3. Limits of validity
Original model developed and validated in the range of 20-60 °C with operating H2 and O2 tank pressure of 15-35 bar.
4. Interfaces
(no remarks)
5. Nomenclature
(no elements)
6. Governing Equations
Pressure is modeled according to Espinosa-López et al 2018 empirical expression for H2O partial pressure and Dalton's Law of partial pressures for O2 and H2. Cathode and anode pressures are defined as constants with a negative 1 bar gradient (i.e. if cathode at 30bar then anode at 29bar).
7. Remarks for Usage
(no remarks)
8. Validation
Results have been validated against Espinosa-López et al 2018 published figures.
9. References
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.
10. Version History
Created by John Webster (jcwebste@edu.uwaterloo.ca) October 2018.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | atmToPa | 101325 | conversion factor for partial pressures |
| SI.Pressure | p_mem_grad | 1e5 | pressure gradient across PEM cell |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Pressure | gasPortPressure (from PartialPressures) | pressure of hydrogen connected to gasPortOut | |
| SI.Pressure | pp_H2O (from PartialPressures) | Pa, vapour pressure of water vapour | |
| SI.Pressure | pp_H2 (from PartialPressures) | Pa, partial pressure of H2 | |
| SI.Pressure | pp_O2 (from PartialPressures) | Pa, partial pressure of O2 | |
| SI.Pressure | p_cat (from PartialPressures) | pressure at cathode (H2) | |
| SI.Pressure | p_an (from PartialPressures) | pressure at anode (O2) | |
| SI.Temperature | T_op | Operating stack temperature |