System for producing dihydrogen, and associated method

Abstract

The invention relates to a system (1) for producing dihydrogen, comprising: an electrolyzer (2) suitable for performing water electrolysis and for producing dioxygen and dihydrogen; a dihydrogen compressor (3); a dihydrogen cooler (4); a main circuit (10) of dihydrogen from the electrolyzer (2), on which at least the compressor (3) and the cooler (4) are successively arranged; and an auxiliary circuit (20) of dioxygen and residual water vapor from the electrolyzer (2), the system being characterized in that it also includes: a condenser of said residual steam; the cooler (4) comprises an expander, an exchanger and a heat-storage module; the condenser, the expander and the exchanger being successively arranged on the auxiliary circuit (20), the exchanger establishing a heat exchange between the dihydrogen compressed by the compressor (3), the dioxygen expanded by the expander and the heat-storage module.

Dependencies are inferred from the claim text.