Development of dynamic model for alkaline water electrolyser: Application to disturbance analysis

Rupsha Bhattacharyya

International Journal of Chemical Engineering and Processing

Development of dynamic model for alkaline water electrolyser: Application to disturbance analysis

Rupsha Bhattacharyya

Abstract

A dynamic model of an alkaline water electrolyser plant has been developed to study its time dependent behaviour when it is subjected to dynamically varying inputs like changing electrolyte flow, inlet temperature, pressure, current, voltage. Such dynamic conditions are expected to arise during start up and shut down and also when the electrolyser is coupled to a nuclear or renewable electricity source, both of which exhibit time dependent power output under various conditions. The electrolyser stack is represented through a lumped capacitance model and the outlet gas and electrolyte flow and temperature are predicted for given dynamic inputs which have well defined mathematical forms. An in-house code is developed and implemented for numerical integration of the governing equations describing the dynamic behaviour of the electrolyser. The model can also account for the variation of than one variable simultaneously, which is generally an anticipated occurrence during actual plant operation.

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Development of dynamic model for alkaline water electrolyser: Application to disturbance analysis

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