Abstract: The invention relates to a solid oxide fuel cell system, wherein planar fuel cells are arranged in stacked form and in this respect an integrated post-combustion of non-oxidized components, or of not fully oxidized components, in the exhaust gas can take place. The fuel cells of a system in accordance with the invention have a cathode-electrolyte-anode unit. A bipolar plate is arranged between two respective fuel cells and channels for the supply and removal of a fuel gas to anodes and of an oxidizing agent to cathodes are present. The exhaust gases at the anode side or at the cathode side are introduced via internal additional channels or directly into an afterburner in which a catalytic post-oxidizing of the exhaust gas mixture formed with the exhaust gas at the anode side and at the cathode side takes place.

Abstract: The invention relates to a solid oxide fuel cell system, wherein planar fuel cells are arranged in stacked form and in this respect an integrated post-combustion of non-oxidized components, or of not fully oxidized components, in the exhaust gas can take place. The fuel cells of a system in accordance with the invention have a cathode-electrolyte-anode unit. A bipolar plate is arranged between two respective fuel cells and channels for the supply and removal of a fuel gas to anodes and of an oxidizing agent to cathodes are present. The exhaust gases at the anode side or at the cathode side are introduced via internal additional channels or directly into an afterburner in which a catalytic post-oxidizing of the exhaust gas mixture formed with the exhaust gas at the anode side and at the cathode side takes place.

Abstract: The invention relates to a method and to a system of operating a high-temperature fuel cell. At least one fuel cell, a reformer, an afterburner and a heat exchanger are present in the system. The total efficiency should be increased with the invention in accordance with the object set. In accordance with the invention, for this purpose, fresh air supplied to the fuel cell(s) at the cathode side is preheated in multiple stages by heat from the afterburning and from the heated air dissipated from the fuel cell(s) at the cathode side by means of a high-temperature heat exchanger.

Abstract: The invention relates to the field of mechanical engineering and refers to a radiation protective shield for vacuum furnaces and protective atmosphere furnaces, which shield is used for the best possible shielding from thermal radiation. The object of the present invention is to disclose thermal radiation protective shields of reduced weight with identical or lower effective emissivity. The object is attained by a thermal radiation protective shield for vacuum furnaces and protective atmosphere furnaces, composed of at least one porous ceramic and/or metallic material that has high thermal radiation-reflecting properties at least on a surface in the direction of the heat source.