| Abstrak/Abstract |
This study investigates the influence of bipolar plate protrusion design on the performance of zero-gap alkaline
water electrolysis (AWE). By varying the number and size of protrusions on the bipolar plates, we evaluate their
effects on electrolyte flow dynamics, gas evolution, temperature distribution, and overall electrolysis efficiency.
Polarization curves obtain at a single chamber voltage of 2.1 V indicates that increasing the number of pro
trusions significantly enhances current density, with values of 0.611 A cm
2
0.679 A cm
2
, 0.658 A cm
2
, 0.673 A cm
2
, and
for 1, 4, 9, and 16 protrusions, respectively. Temperature analysis reveals that additional contact
points improve thermal uniformity. Moreover, gas volume fraction measurement in the flow chamber shows that
smaller protrusion areas facilitate more efficient gas release, with hydrogen fractions decreasing from 0.1091 to
0.1055 as the number of protrusions increases. These results underscore the importance of optimizing protrusion
design to balance performance enhancement and manufacturing cost, providing valuable insights for the
development of high-efficiency AWE. |
