Two-Step Thermochemical Cycles for Hydrogen Production with Dish Type Solar Thermal System
Abstract
The two-step water splitting thermochemical cycle is composed of the T-R (Thermal Reduction) and W-D (Water Decomposition) steps. The mechanism of this cycle is oxidation-reduction which produces hydrogen. The reaction temperature necessary for this thermochemical cycle can !e achie"ed !y a dish-type solar thermal collector (#nha %ni"ersity $orea). The purpose of this study is to "alidate a water splitting de"ice in the field. The de"ice is studied and fa!ricated !y $odama et al ((&'& (&''). The "alidation results show that the foam de"ice when loaded with *i)e(+,-m-.r+( powder was successfully achie"ed hydrogen production with / ('& with a 0e-light solar simulator (&&/ $odama et al.) repeated cycles under field conditions. Two foam de"ice used in this study were tested for "alidation !efore an experiment was performed. The la! scale ferrite-con"ersion rate was in the range of (,4321. Two foam de"ices were designed to for structural sta!ility in this study. #n the results of the experiments the hydrogen percentage of the weight of each foam de"ice was on average and the conversion rates