METHOD FOR DETERMINING THE INDIVIDUAL CURRENT EFFICIENCY IN AN ELECTROLYSER

摘要

The invention relates to a method for determining the current efficiency of the individual elements in an electrolyser comprising at least one cell element of an electrolyser. For this purpose, a method is described, wherein an electrolysis current I is applied to an electrolyser comprising at least one individual element and is raised to a specific current value; a time is determined, which is set randomly before or after the electrolysis current is switched on, wherein the electrolysis current must not exceed a specific maximum value; the voltage U­i of the at least one individual element i is measured and the average of all the individual element voltages UM is measured; a time tEND is determined, after which all the cell voltages of individual elements deviate by a defined voltage difference from the average of all the individual element voltages; the area Ai under the voltage curve of each individual element is determined via numerical integration over a suitable variable x in the limits between x0 = x(t0) und xEND = x(tEND); the area AM under the voltage curve of the average of all the individual elements is determined by numerical integration against the variable x in the limits x(t0) and x(tEND); the average electrolyser current efficiency is determined via a method according to the prior art; the current efficiency of each individual element is calculated as a function of the electrolyser current efficiency via an empirical function, wherein the empirical function includes the area ratio Ai / AM.