Solid oxide fuel cell power generation system for enhancing heat transfer

Abstract

The invention relates to a solid oxide fuel cell power generation system capable of enhancing heat transfer. The solid oxide fuel cell power generation system comprises a cell stack module, a fuel supply flow channel, a fuel distribution cavity, an oxidant input flow channel, an output flow channel, a tail gas mixing cavity and a cell stack control module, wherein the fuel distribution cavity is connected with a feeding hole of the cell stack module and is used for supplying fuel to the cell stack module; the oxidant input flow channel is used for supplying an oxidant to the cell stack module.The fuel cell system can be started to the operating temperature of the high-temperature cell more quickly through the self-heating process, so that the solid oxide fuel cell stack rises to the temperature at which power can be generated without the help of an external heat source; and the heat of the system can be kept to run stably and sufficiently, so that the time from starting to power generation is shortened, and the power generation is started in a fully stable state.

Description

Technical field [0001] The invention relates to the field of solid oxide fuel cell power generation, in particular to a solid oxide fuel cell power generation system with enhanced heat transfer. Background technique [0002] The solid oxide fuel cell (Solid Oxide Fuel Cell: hereinafter referred to as "SOFC") uses oxide ion conductors as electrolytes. Electrodes are arranged on both sides of the solid oxide fuel cell. Fuel gas is supplied on one side and oxidant (air, Oxygen, etc.), a fuel cell technology that generates electricity at a higher temperature. In SOFC, oxygen ions react with fuel through a solid electrolyte with ion conductivity to generate water vapor or carbon dioxide, and simultaneously generate electricity and heat. The output electric energy is used for various electrical purposes. On the other hand, thermal energy is used to heat fuel, reformers, water, and oxidizers. [0003] Since the solid oxide fuel cell needs to generate electricity at a high temperature o...

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Problems solved by technology

[0003] Since the solid oxide fuel cell needs to generate electricity at a high temperature of 600 ° C to 800 ° C, if the solid oxide fuel cell is to be practically applied, it needs to be in a state of being away from the wall, self-heating to reach the operating temperature, and for mobile and portable batteries below kilowatts In terms of the system, it is necessary to quickly raise the temperature of the battery stack to above 600°C to meet the requirements of battery operation. At present, for this process, the oxidant is used in the mode of simple heat exchange or even no heat exchange, without sufficient heat exchange. The oxidant entering the stack will cause a large temperature difference in the stack, and it will take a long time to heat up to 600°C, 50min

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