Comprehensive system level modeling of anion exchange membrane water electrolysis for high efficiency hydrogen production

Anion exchange membrane water electrolysis (AEMWE) is recognized as a promising route to low cost, high efficiency green hydrogen production. A comprehensive system model was developed and implemented in Aspen Plus®, in which a zero dimensional electrochemical stack was embedded via a Fortran subroutine, along with an iterative solution scheme implemented within the subroutine. The framework reveals the coupled interaction between mass balance and operating conditions governing water management, and quantitatively resolves phenomena that were previously treated conceptually through a numerical method, enabling direct quantification of water transport and predictive analysis of system behavior. The full Balance of Plant (BOP) (separator, heater, heat exchanger, pumps, chiller, condenser, and dryer) was represented, and simulations were performed across various operating conditions (curren…