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Section 4.3 Determination of the electrochemical active electrode area As shown in Figure 4-6 to Figure 4-10, the adapted model with a scaling factor of 2.38 correlates significantly better to the measurement data of two manufacturers than the approach commonly used in the literature approach. Even for the third manufacturer, whose scaling factor is excluded from further considerations, the match of the adapted model with a scaling factor of 2.38 is substantially better than the literature model, shown in Figure 4-7 and Figure 4-8. However, in particular towards the end of the discharging process, the simulated voltage is still significantly too low after the adaption of the electrode area with a factor of 2.38. The yielded quality criteria confirm that the deviations between model and reality are significantly smaller with the adapted model using the average scaling factor, as shown in Table 4-2. However, in particular for one manufacturer, significant deviations remain. Table 4-2: Quality criteria for the model using the average scaling factor of 2.38 qmax in mV RMSEmax in mV ØRMSE in mV ΔEDischarge,max Manuf. A 591 250 236 116% Manuf. B 37 12 8 7.8 % Manuf. C 214 65 62 47 % 70PDF Image | Model-based Design Vanadium Redox Flow Batteries
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