FIELD: production of oxygen and generation of energy. SUBSTANCE: oxygen-containing compressed gas flow is heated and then in brought in contact with diaphragm made from solid electrolyte for obtaining oxygen-depleted compressed gas flow and production of oxygen. In is good practice to additionally heat oxygen-depleted gas flow before expansion in gas turbine and to use it for production of vapor and/or preliminary heating of oxygen-containing gas flow. EFFECT: enhanced efficiency. 9 cl, 6 dwg
