Control arrangement for an alkaline pressure electrolyzer

A method of controlling an alkaline pressure electrolyzer having gas spaces for receiving H2 and O2 gases and including a manual control input (95) and an integrally operating controller (165) for the control value gas pressure in said gas spaces, an uncoupling network (84, 85, 87, 88, 89, 90, 92, 93), which provides control inputs for independently controlling a fill level difference and the gas pressure in said gas spaces, and hydrogen and oxygen blow-down valves in communication with said gas spaces for releasing H2 and, respectively, O2 therefrom, said method comprising the step of controlling the blow-down of said hydrogen and said oxygen from the respective gas spaces at a ratio of 2:1.

A method of controlling an alkaline pressure electrolyzer including gas spaces for receiving H2 and O2 gases generated by said pressure electrolyzer, a manual control input (94) and an integrally acting controller (164) for the control value fill level difference, an uncoupling network (84, 85, 86, 87, 88, 89, 90, 92, 93), which provides control inputs for independently controlling the fill level difference of said gas spaces and the gas pressure therein and hydrogen and oxygen blow-down valves (122, 123) in communication with said gas spaces for releasing H2 and, respectively, O2 therefrom, said method comprising the step of controlling with a change of the control signal to the manual control input of the fill-level difference (94) the blow-down volume flows of gases from said gas spaces in such a way that the sum of the gas flow changes is zero.

A method of controlling an alkaline pressure electrolyzer including gas spaces for receiving H2 and O2 gases generated by said pressure electrolyzer, a manual control input (94, 95) and an integrally acting controller (164, 166) for each of the control values gas pressure and fill level difference of said gas spaces, an uncoupling network (84, 85, 87, 88, 89, 90, 92, 93), which provides control inputs for independently controlling fill level difference and gas pressure in said gas spaces, and hydrogen and oxygen blow-down valves (122, 123) in communication with the respective gas spaces, said method comprising the steps of controlling said hydrogen and oxygen blow-down valves such that the blow-down volume flow from said hydrogen and oxygen gas spaces is at a ratio 2:1 and a change of the control signal for the manual control input of the fill-level difference causes the blow-down volume flows of the gases from the gas spaces such that the sum of the gas flow changes of the two flows is zero while concurrently influencing the control values fill-level difference and gas pressure independently of each other.