Fuel cells and Electrolyzers

Submodels updated

H2PEMFC01V01, H2PEMFC03V01, H2PEMFCEC01V01, H2PEMFCEC03V01, H2PEMFCND01V01: Fuel cell models can now handle the computation of the Nernst potential based on the Gibbs Free energy of reaction (ELE-13571).

New dedicated tools

Fuel cell aging tool (ELE-14809): This tool is dedicated to the identification of voltage drop degradation parameters and their associated time-dependent laws, from experimental time-series polarization curves.

Dedicated tools updated

H2 Polarization Curve app: It is now possible to compute the Nernst potential using the Gibbs Free energy of the reaction (ELE-15656).

New Demos

Demo > Library > Fuel Cells and Electrolyzers > Dynamic PEMFC stack model: This demo, already available in the FC library, is now compatible with the new gas library (ELE-15512).

Demo > Library > Fuel Cells and Electrolyzers > Discretized PEMFC stack model: This demo, already available in the FC library, is now compatible with the new gas library (ELE-15513).

Demo > Library > Fuel Cells and Electrolyzers > Aging of quasi-static PEMFC stack: This demo explains how to parameterize a semi-empirical model of a PEMFC stack with degradation parameters. It showcases the use of the new Fuel Cell Aging Tool.

Demos updated

Demo > Library > Fuel Cells and Electrolyzers > Fuel cell system integration in a Fuel Cell Electric Vehicle:

• Real gas Equations Of States (EOS) are now used instead of semi-perfect gas EOS in the high-pressure part of the hydrogen circuit. This allows increased accuracy while limiting the increase of CPU time (ELE-15775).

• Porous media submodels are now used to better model the gas diffusion layers of the fuel cell (ELE-15640).

New utilities

• h2_compute_Enernst_T_from_Gibbs: computes the Nernst potential of a Red/Ox reaction occurring at specific conditions of temperature and pressure, using the Gibbs Free energy of reaction.

• h2_compute_Enernst_T_from_deltaHr0: computes the temperature-dependent Nernst potential of a Red/Ox reaction.

• h2_compute_Enernst_PT: computes the Nernst potential with regards to the species partial pressures in the Red/Ox reaction.

Utilities updated

h2_compute_Enernst: now considered as obsolete and should be replaced by h2_compute_Enernst_T_from_Gibbs or h2_compute_Enernst_T_from_deltaHr0 for the temperature-dependent Nernst potential computation, while the species partial pressure dependency can be computed by h2_compute_Enernst_PT.