The invention discloses an emission control system. A vehicle-mounted solid oxide fuel cell system using the emission control system comprises a stack and a burner. The emission control system comprises an EGR intake pipe, as well as an exhaust cooling device, a supercharging device, a gas storage device and an EGR valve connected in sequence by the EGR intake pipe. An inlet end of the EGR intake pipe is connected to an exhaust pipe of the burner, and an outlet end of the EGR intake pipe is connected to an inlet pipe between the stack and the burner. This solution adds an EGR system to the original vehicle-mounted solid oxide fuel cell system. As the introduced exhaust gas can reduce the ambient temperature of the inlet gas, the generation of pollutants such as NOx can be reduced. In addition, after the EGR exhaust gas participates in combustion, the combustion temperature is further reduced, thereby inhibiting the generation of pollutants such as NOx. The present invention also discloses a vehicle-mounted solid oxide fuel cell system comprising the foregoing emission control system.

A fuel cell system includes a fuel cell stack, an anode tail gas oxidizer (ATO), an ATO injector configured to mix a first portion of an anode exhaust from the fuel cell stack with a cathode exhaust from the fuel cell stack and to provide a mixture of the first portion of the anode exhaust and the cathode exhaust into the ATO, an anode exhaust conduit which is configured to provide the first portion of the anode exhaust into the ATO injector, and cathode exhaust conduit which is configured to provide at least a portion of the cathode exhaust from the fuel cell stack into the ATO injector. The ATO injector includes injector tubes or injection apertures.

A fuel cell system is provided and the fuel cell system includes: a fuel cell; a fuel processing unit configured to process a raw fuel to produce a fuel gas for the fuel cell; an oxidant gas heating unit configured to heat an oxidant gas for the fuel cell; a combustor configured to combust the raw fuel to produce a combustion gas for use in heating the fuel processing unit and the oxidant gas heating unit; a supply control unit configured to, during a warm-up of the fuel cell, control supply of the raw fuel to the fuel processing unit and the combustor; and a power generation control unit configured to control a power generation state during the warm-up of the fuel cell. When the fuel cell has reached a power generation available temperature, the power generation control unit is configured to cause the fuel cell to perform power generation, and the supply control unit is configured to supply the raw fuel to both the fuel processing unit and the combustor.

A hybrid powerplant can include a fuel cell cycle system configured to generate a first power using a fuel and an oxidizer. The powerplant can also include a supercritical carbon dioxide (sCO.sub.2) cycle system operatively connected to the fuel cell cycle to receive heat from the fuel cell cycle to cause the sCO.sub.2 cycle system to generate a second power.

A portable fuel cell system that is compact. The integration of a snorkel into the chassis allows the fuel cell to operate inside a backpack. The fuel cell system includes a thermal management system to keep the surface of the chassis at a comfortable temperature for the user. A boiler is mounted on a side of the fuel cell stack such that waste heat from the fuel cell stack is efficiently transferred to the boiler to vaporize fuel. A burner is positioned away from the fuel cell stack so that the system can be more compact. A thermal management system, including a blower, a heatsink, and a cooling air shroud, regulates the temperature of the fuel cell system.

A fuel cell system includes a fuel cell configured to generate electricity by receiving a working gas, a combustor configured to combust an off-gas discharged from the fuel cell, a heat exchange device configured to supply the working gas to the fuel cell, and perform heat exchange with a discharged gas from the combustor, and a manifold disposed between the fuel cell and the combustor, and between the fuel cell and the heat exchange device. The manifold includes an off-gas flow path along which the off-gas discharged from the fuel cell is guided to the combustor and a discharged gas flow path along which the discharged gas discharged from the combustor is guided to the heat exchange device.

The purpose of the present invention is to provide: fuel cell system that can further stabilize an operation of the system; and control method thereof. Fuel cell system comprises: fuel cell; a turbocharger; oxidizing gas supply line that supplies, to cathode, oxidizing gas compressed by a compressor; a heat exchanger that heats the oxidizing gas of the oxidizing gas supply line by means of exhaust gas discharged from a turbine, and flows the exhaust gas to combustion exhaust gas line; bypass lines each having one end connected to the upstream side of the heat exchanger in the oxidizing gas supply line and bypassing the oxidizing gas; flow rate regulating valves provided in the bypass lines; and a control unit that controls the flow rate regulating valves on the basis of the ambient air temperature, and controls the bypass flow rate of the oxidizing gas.

A high efficiency hydrogen fuel system for an aircraft at high altitude which utilizes compressors to compress air to a sufficiently high pressure for the fuel cell. Liquid hydrogen is compressed and then utilized in heat exchangers to cool the compressed air, maintaining the air at a temperature low enough for the fuel cell. The hydrogen is also used to cool the fuel cell as it is also depressurized prior to its entry in the fuel cell cycle. A water condensation system allows for water removal from the airstream to reduce impacts to the atmosphere. The hydrogen fuel system may be used with VTOL aircraft, which may allow them to fly at higher elevations. The hydrogen fuel system may be used with other subsonic and supersonic aircraft, such as with asymmetric wing aircraft.

An engine assembly includes a combustor, a fuel cell stack fluidly connected to the combustor, the fuel cell stack being configured (i) to generate power using fuel and air directed into the fuel cell stack and (ii) to direct fuel and air exhaust from the fuel cell stack into the combustor, a compressor fluidly connected upstream of (i) the combustor and (ii) the fuel cell stack, the compressor being configured to generate compressed air to direct into the fuel cell stack, a turbine disposed downstream from the combustor, the turbine having a turbine inlet temperature, and a controller that is configured to control a power allocation between the fuel cell stack and the turbine based upon the turbine inlet temperature of the turbine. The combustor is configured to combust the fuel and air exhaust from the fuel cell stack into one or more gaseous combustion products that power the turbine.

A fuel cell device may include a fuel cell module; a condensate water recovery flow path which may recover water contained in an exhaust gas discharged from the fuel cell module as condensate water; a condensate water recovery device which may store the condensate water; and a reforming water supply flow path which may supply the condensate water to a reformer. The condensate water recovery device of the fuel cell device may include a first ion exchange container which may contain an ion exchange resin; and a first storage container which may store the condensate water. The first ion exchange container may be disposed inside the first storage container with a space from the first storage container, and may be attachable to and detachable from the first storage container.