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Stack protection method in case of emergency shut down or black out in solid oxide fuel cell system

A technology of fuel cell stacks and solid oxides, which is applied in the field of stacks and can solve problems such as difficulty in application

Inactive Publication Date: 2016-10-26
POSTECH ACAD IND FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] However, these methods are for pre-planned work interruptions, for some unforeseen interruptions, such as sudden failure of pumps or machinery, or sudden loss of water or fuel, or external power failure due to black out case, it is difficult to apply

Method used

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  • Stack protection method in case of emergency shut down or black out in solid oxide fuel cell system

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Embodiment Construction

[0040] Below, in order to describe the principle of the present invention in detail, in figure 1 The diagram of the layout of the provided equipment and the general equipment of the solid oxide fuel cell are also shown in . like figure 1 As shown, the difference from the common fuel cell system is that the auxiliary gasifier 6 placed in the hot box together with the stack and the gas dissolving equipment 71 in the storage pool, and the gas 11 and water 41 do not directly flow into the fuel cell system by gasification The stack pretreatment device 2 composed of the reformer / reformer 4, but the water is distributed and supplied to the auxiliary gasifier 6, and the gas 11 first flows into the pretreatment device 2 through the auxiliary gasifier 41, that is, using this simple and easy Changes can realize the proposal of the present invention. In order to realize the present invention smoothly, first, the storage pool is designed to maintain a certain water level through the wate...

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PUM

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Abstract

The present invention relates to a stack protection method in case of emergency shut down or black out in a solid oxide fuel cell system and, more particularly, to a system and a method for, if supply of fuel gas and water to an anode channel of a stack is discontinued due to emergency shut down or black out, etc. in a solid oxide fuel cell system, preventing an anode from being contaminated by oxygen in the air and preventing re-oxidation of an anode material from occurring and cracks from forming on the stack due to the contamination. A fuel cell according to the present invention is disposed in a hot box along with a fuel cell stack, and has an auxiliary vaporizer which vaporizes and supplies, to a stack anode, water supplied from a water reservoir tank by a water level difference.

Description

technical field [0001] The present invention relates to a stack protection method during emergency shutdown or power failure of a solid oxide fuel cell system, and in more detail, relates to a method for interrupting the negative electrode to the stack when the solid oxide fuel cell system is shut down or power failure occurs. In the case of channels feeding gas and water, the negative electrode is prevented from being contaminated by oxygen in the air, thereby preventing the stack from cracking while the negative electrode material is re-oxidized. Background technique [0002] A fuel cell is a device that directly converts chemical energy generated by the combustion of fuel and oxygen into electricity. In most cases, hydrogen is used as fuel. [0003] h 2 +O 2 →H 2 O (generates electricity and heat) [0004] A fuel cell is a stack of unit cells (cells) consisting of a negative electrode (fuel electrode, ancode), electrolyte (electrolyte), and positive electrode (air ele...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/2475H01M8/04119H01M8/04223H01M8/04291
CPCH01M8/04126H01M8/0618H01M2008/1293H01M8/04228H01M8/04303H01M8/2432H01M8/2457Y02E60/50H01M8/04291H01M8/1231H01M8/2425
Inventor 郑钟植朴城台
Owner POSTECH ACAD IND FOUND
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