Multiphysical Models for Hydrogen Production Using NaOH and Stainless Steel Electrodes in Alkaline Electrolysis Cell

Table 7

Parameters specific to the experiment on the types of electrolyte at 40 wt%.

Symbol	Description	Value	Unit
	of NaOH + tap water at 80°C	90.83	S/m
	of NaOH + AC water at 80°C	90.83	S/m
	of NaOH + pressing water at 90°C	108.33	S/m
	of NaOH + factory water at 90°C	108.33	S/m
	Distance between the anode and the membrane	0.005	m
	Distance between the cathode and the membrane	0.005	m
	Void fraction of NaOH + tap water at 80°C	0.2	—
	Void fraction of NaOH + AC water at 80°C	0.12	—
	Void fraction of NaOH + pressing water at 90°C	0.35	—
	Void fraction of NaOH + factory water at 90°C	0.29	—
C1	Voltage drop for NaOH + tap water at 80°C	−1.7087	V
C2	Voltage drop for NaOH + AC water at 80°C	−1.5259	V
C3	Voltage drop for NaOH + pressing water at 90°C	−2.0872	V
C4	Voltage drop for NaOH + factory water at 90°C	−1.8505	V
k1	Correction factor for NaOH + tap water at 80°C	0.034	—
k2	Correction factor for NaOH + AC water at 80°C	0.032	—
k3	Correction factor for NaOH + pressing water at 90°C	0.033	—
k4	Correction factor for NaOH + factory water at 90°C	0.033	—