Abstract: A fuel cell power generation module includes a first fuel cell module, and a second fuel cell module capable of generating power with a first exhaust fuel gas exhausted from the first fuel cell module. It is configured such that a first recirculation line recirculates from a second exhaust fuel gas line through which a second exhaust fuel gas exhausted from the second fuel cell module flows, and the second exhaust fuel gas is supplied to a fuel-side electrode of the second fuel cell module.

Abstract: A fuel cell power generation system includes: a fuel cell; a peripheral device used to operate the fuel cell; a resource storage part; and a resource supply part. The resource storage part is capable of storing a resource generated in the fuel cell in an operation/stop process of the fuel cell. The resource supply part is capable of supplying the resource stored in the resource storage part to at least either of the fuel cell or the peripheral device.

Abstract: A fuel cell power generation system includes: a first fuel cell; and a second fuel cell connected to a downstream side of the first fuel cell via an exhaust fuel gas line, the second fuel cell being capable of generating electric power using an exhaust fuel gas from the first fuel cell. A water recovery unit is disposed on the exhaust fuel gas line, the water recovery unit being capable of recovering water contained in the exhaust fuel gas. A bypass line brings an upstream side and a downstream side of the exhaust fuel gas line with respect to the water recovery unit into communication. At least one flow control valve is disposed on at least one of the exhaust fuel gas line or the bypass line. A control unit controls an opening degree of the at least one flow control valve.

Abstract: A fuel cell power generation system includes: a fuel cell; at least one compressor disposed on an oxidant supply line for supplying an oxidizing gas to the fuel cell; a first motor configured to drive a first compressor among the at least one compressor; and at least one power converter disposed between the first motor and a power grid, and capable of adjusting a torque of the first motor.

Abstract: A biogas-utilizing methanation system includes: a solid oxide fuel cell using a to-be-treated gas as a fuel gas; a hydrogen production device capable of producing hydrogen by using power of a renewable energy power generation device; and a methanation device capable of methanating carbon dioxide in the system with the hydrogen produced by the hydrogen production device. The carbon dioxide in the system can be stored in a storage device on the basis of the supply amount of the to-be-treated gas or the power of the renewable energy power generation device.

Abstract: A fuel cell power generation system is provided with: at least one fuel cell module each of which includes a fuel cell having a fuel-side electrode, an electrolyte, and an oxygen-side electrode; at least one fuel supply line for supplying a fuel gas to the fuel-side electrode included in the at least one fuel cell module; at least one oxidizing gas supply line for supplying an oxidizing gas to the oxygen-side electrode included in the at least one fuel cell module; and a most downstream exhaust fuel gas line through which an exhaust fuel gas discharged from a most downstream module that is disposed most downstream in a flow of the fuel gas among the at least one fuel cell module flows. The most downstream exhaust fuel gas line is configured to supply the exhaust fuel gas to the oxygen-side electrode included in any of the fuel cell modules.

Abstract: This fuel cell cartridge includes a plurality of cell stacks including a plurality of cells for forming a solid oxide fuel cell. A cell stack group including the plurality of cell stacks includes an inner cell stack group arranged in an inner region of a cell arrangement region and an outer cell stack group arranged in an outer region. The inner cell stack group and the outer cell stack group are connected in series and a current density of the outer cell stack group is configured to be higher than a current density of the inner cell stack group.

Abstract: A sealing structure of a cell tube for a tubular type fuel cell has a sealed portion composed of a conductive lead film formed on a surface of a substrate tube, and an airtight film with high airtight properties formed on a surface of the lead film. The sealing structure also has an adhesion enhancing film provided on a surface of the airtight film, and a sealing member adhered to a surface of the adhesion enhancing film via an inorganic adhesive coated on the surface of the adhesion enhancing film. Thus, the sealability of the cell tube is increased, and the electrical characteristics of the fuel cell are improved.

Abstract: A full cell comprising a fuel electrode and an air electrode disposed on side surfaces of an electrolyte film is disclosed. The fuel electrode is supplied with a fuel gas, and the air electrode is supplied with air. The air electrode has a close-packed structure in which the ratio between the average particle size of coarse particles and the average particular size of fine particles is from 5/1 to 250/1. The resulting fuel cell is increased in conductivity.

Abstract: A material for a base tube of a fuel battery, comprising a mixture of at least two components selected from the group consisting CaO, ZrO2, NiO, MgO, SrO, Al2O3, TiO2, and BaO. Such material suppresses cracks of an electrolyte and also suppress leakage after rapid temperature increase and decrease, thus providing a reliable fuel battery.

Abstract: The present invention discloses a base tube for a fuel cell produced by forming a film of a fuel electrode and a film of an air electrode on a surface of the base tube, the base tube comprising a mixture of a raw material for the base tube, and coarse particles, whereby the mixture shrinks nonuniformly when sintered to increase the porosity of the base tube. Thus, the gas permeability and the cell electrical efficiency can be increased.

Abstract: The present invention discloses a base tube for a fuel cell produced by forming a film of a fuel electrode and a film of an air electrode on a surface of the base tube, the base tube comprising a mixture of a raw material for the base tube, and coarse particles of metal oxide, whereby the mixture shrinks nonuniformly when sintered to increase the porosity of the base tube. Thus, the gas permeability and the cell electrical efficiency can be increased.

Abstract: A material for a base tube of a fuel battery, comprising a mixture of at least two components selected from the group consisting CaO , ZrO2, NiO, MgO, SrO, Al2O3, TiO2, and BaO. Such material suppresses cracks of an electrolyte and also suppress leakage after rapid temperature increase and decrease, thus providing a reliable fuel battery.

Abstract: A material for a base tube of a fuel battery, comprising a mixture of at least two components selected from the group consisting CaO , ZrO2, NiO, MgO, SrO, Al2O3, TiO2, and BaO. Such material suppresses cracks of an electrolyte and also suppress leakage after rapid temperature increase and decrease, thus providing a reliable fuel battery.