Thermodynamic analysis and experimental investigation of a unique photoelectrochemical hydrogen production system

Abstract

In this study, we thermodynamically analyze and experimentally investigate a continuous type hybrid photoelectrochemical H<inf>2</inf> generation reactor. This system enhances solar spectrum use by employing photocatalysis and PV/T. Additionally, by replacing electron donors with electrodes to drive the photocatalysis, the potential of pollutant emissions are minimized. In this study, the present reactor is tested under electrolysis operation during which the present reactor is investigated under three different inlet mass flow rates (0.25, 0.50, and 0.75 g/s) and four different operating temperatures (20, 40, 60, and 80 °C). Some parametric studies are run by varying the environmental temperature between 0 and 40 °C. In addition, the impact of coating the membrane electrode assembly of the reactor with Cu<inf>2</inf>O is investigated. The present results show that the highest energy and exergy efficiencies occur at the environmental temperature of 20 °C which is about 60% and 50%, respectively. The Cu<inf>2</inf>O coated membrane gives a lot higher current readings, meaning that the coating makes the membrane more conductive and increases H<inf>2</inf> production by permitting ions at a higher rate. © 2018 Elsevier B.V., All rights reserved.