SOEC SYSTEM AND METHOD FOR OPERATING A SOEC SYSTEM

The present invention relates to an SOEC system (), comprising a fuel cell stack () having a gas side () and an air side (), and an ejector () for supplying a process fluid to a gas inlet () on the gas side (), wherein the ejector () comprises a primary inlet (), for introducing a water-containing primary process fluid through a primary line () of the SOEC system () into a primary portion () of the ejector (), and a secondary inlet (), for introducing recirculated secondary process fluid through a recirculation line () of the SOEC system () from a gas outlet () on the gas side () into a secondary portion () of the ejector (), wherein the SOEC system () further comprises a control gas supply portion () for supplying control gas into the primary portion () and into the secondary portion () in order to control a pressure and/or mass flow in the primary portion () and in the secondary portion (), and wherein the control gas supply portion () comprises a valve arrangement () for controlling the pressure and/or the mass flow in the primary portion () and in the secondary portion (). The invention further relates to a method for operating an SOEC system () according to the invention.