SOFC-GT hybrid power generation system based on multi-type fuel

Abstract

The invention discloses an SOFC-GT hybrid power generation system based on multi-type fuel. The system comprises an air supply unit, a fuel supply unit, a heat exchanger unit, a fuel cell stack unit and a gas turbine unit. The air supply unit supplies air to the heat exchanger unit, and the air enters a fuel cell cathode after being heated by the heat exchanger unit; the fuel supply unit transmits fuel to the anode of the fuel cell for an electric pile reaction, water vapor in an anode reaction product is separated by the membrane separation device and enters the mixer, and the rest is introduced into the combustion chamber to be combusted together with the fuel provided by the fuel supply unit; combustion products and heat energy are used for preheating the system and driving the gas turbine unit to generate and output electric energy. According to the system, various fuels can be used as energy sources, the application range is wide, meanwhile, the energy utilization rate can be increased, the power-weight ratio of the system is increased, and application of the system in the aerospace field becomes possible.

Description

technical field [0001] The invention relates to a multi-type fuel-based SOFC-GT hybrid power generation system, belonging to the technical fields of energy, reforming hydrogen production and high-efficiency power generation. Background technique [0002] Solid oxide fuel cell (SOFC) technology has become a new generation energy technology that can change the way modern energy is generated due to its excellent power generation characteristics. SOFC can directly convert the chemical energy of fuel into electrical energy through electrochemical reaction, with high power generation efficiency, and the products are water and carbon dioxide. It is widely regarded as a high-efficiency clean energy power generation technology. [0003] SOFC is a fuel cell with a working temperature of 800°C to 1100°C, so it can directly use methane, carbon monoxide, natural gas, gasified coal, etc. as fuel. Because its exhaust temperature is very high, it belongs to high-grade energy and has high u...

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Problems solved by technology

[0004] However, in the SOFC-GT system, it is not easy to switch between multiple fuels. Fuel switching will cause system performance problems. In order to prove the system’s ability to diversify fuels and evaluate the consequences of switching fuels, numerical simulation plays a crucial role. important role

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