Abstract: The invention concerns a system (1) for producing dihydrogen comprising: —a high-temperature electrolyser (2) suitable for implementing steam electrolysis at a temperature greater than 500° C. and producing a mixture of steam and dihydrogen; —a dihydrogen compressor (3); —a main water and dihydrogen circuit (10) on which at least an evaporator (11), the high-temperature electrolyser (2), a condenser (E3) and the compressor (3) are arranged in succession, a first heat exchanger (E1) bringing the steam from the evaporator (11) and the mixture of steam and dihydrogen from the high-temperature electrolyser (2) into heat exchange so as to superheat the steam from the evaporator (11); the system being characterised in that—the compressor (3) is a chemical compressor supplied with heat by heat exchange with the condenser (E3); —the condenser (E3) is disposed directly at the outlet of the first exchanger (E1).

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.

Abstract: The invention relates to a system (1) for producing dihydrogen, comprising: an electrolyser (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 electrolyser (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 vapour from the electrolyser (2), the system being characterised 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.

Abstract: The invention concerns a system (1) for producing dihydrogen comprising:—a high-temperature electrolyser (2) suitable for implementing steam electrolysis at a temperature greater than 500° C. and producing a mixture of steam and dihydrogen;—a dihydrogen compressor (3);—a main water and dihydrogen circuit (10) on which at least an evaporator (11), the high-temperature electrolyser (2), a condenser (E3) and the compressor (3) are arranged in succession, a first heat exchanger (E1) bringing the steam from the evaporator (11) and the mixture of steam and dihydrogen from the high-temperature electrolyser (2) into heat exchange so as to superheat the steam from the evaporator (11); the system being characterised in that—the compressor (3) is a chemical compressor supplied with heat by heat exchange with the condenser (E3);—the condenser (E3) is disposed directly at the outlet of the first exchanger (E1).