Enhancement of Water Electrolyzer Efficiency

Abstract

In this project, factors affecting efficiency of water electrolysis such as the electrolyte type, electrodes spacing, electrodes surface morphology (smooth or rough), electrodes effective area (or number of electrodes) and electrodes connection configuration were investigated. The efficiency was calculated as the ratio between the HHO flow rate measured experimentally to that measured theoretically from Faraday’s law. It is found that the best efficient electrolyzer consists of 22 plates (4 anodes, 4 cathodes and 14 neutrals) where each plate area was 17x15 cm². When the 22 plates were connected in parallel and immersed in 20 g KOH/3L electrolyte, they produced HHO gas flow rate of 740 ml/min at 17 A and 62.92 % efficiency.

Keywords: Energy, HHO, Hydrogen, Electrolysis, Efficiency, Environment.