Method and arrangement for minimizing need for safety gases

A safe gas and demand technology, applied in the field of equipment and methods that minimize the demand for safe gas, can solve problems such as not being able to be used in this way, achieve the effect of saving physical size and reducing the risk of anodic oxidation

Active Publication Date: 2014-05-28
CONVION OY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In emergency shutdown (ESD) situations, methods of the type described cannot be used as such

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  • Method and arrangement for minimizing need for safety gases
  • Method and arrangement for minimizing need for safety gases
  • Method and arrangement for minimizing need for safety gases

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Embodiment Construction

[0021] Solid oxide fuel cells (SOFCs) are available in a variety of geometries. plane geometry ( figure 1 ) is a typical sandwich type geometry employed by most types of fuel cells, with the electrolyte 104 sandwiched between the electrodes (anode 100 and cathode 102). SOFCs can also be fabricated in tubular geometries where, for example, air or fuel passes through the inside of the tube and other gases pass along the outside of the tube. Tubular design is better in air and fuel barrier. In conclusion, the performance of the planar design is better than that of the tubular design because the planar design has relatively low resistance. Other SOFC geometries include modified planar cells (MPC or MPSOFC), where a wave-like structure replaces the flat structure of conventional planar cells. These designs are allowed because they have both the advantages of planar cells (low resistance) and tubular cells.

[0022]The ceramics used in SOFCs cannot become ionically active unless...

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Abstract

The focus of the invention is an arrangement for minimizing need for safety gases in high temperature fuel cell system, each fuel cell in the fuel cell system comprises an anode side (100), a cathode side (102), and an electrolyte (104) between the anode side and the cathode side, the fuel cells being arranged in fuel cell stacks (103), and the fuel cell system comprises a fuel cell system piping for reactants, and means (108) for feeding fuel to the anode sides (100) of the fuel cells. The arrangement comprises means (122) for electrical anode protection supplying a predefined voltage separately to at least two fuel cell stacks (103) or groups of fuel cell stacks (103) to prohibit oxidation of anodes (100), a source (120) of energy sufficient for providing electrical energy for at least a predetermined minimum time for said means (122) for electrical anode protection, means (124) to reduce said predefined voltage to limit anode protection current to a predefined maximum current value separately for at least two stacks (103) or groups of stacks (103), and means (126) to reliably trigger said means (122) for electrical anode protection in a situation where anode oxidation cannot be prohibited by the means (108) for feeding fuel to the anode sides (100) of the fuel cells.

Description

technical field [0001] Most of the world's energy is generated through oil, coal, natural gas and nuclear power. All these production methods have their specific problems, eg in terms of usability and friendliness for the environment. As far as the environment is concerned, especially when oil and coal are burned it causes pollution. The problem with nuclear energy is at least the storage of spent fuel. [0002] Particularly because of environmental concerns, new energy sources have been developed that are more environmentally friendly and, for example, have higher efficiency than the aforementioned energy sources. Fuel cell devices, by which fuel such as biogas is directly converted into electric current via chemical reactions in an environmentally friendly process, are considered as promising energy conversion devices. Background technique [0003] like figure 1 As shown, the fuel cell includes an anode side 100 and a cathode side 102 with an electrolyte material 104 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04H01M8/12H01M8/24H01M16/00
CPCH01M8/04365H01M8/04955H01M8/04223H01M8/0491H01M8/0488H01M8/04Y02E60/50H01M8/04649H01M2008/1293Y02E60/525H01M8/249H01M16/003H01M8/04228H01M8/04303H01M8/1213H01M8/24H01M16/00H01M8/04225
Inventor 特罗·霍蒂宁金·阿斯特罗姆M·莱蒂宁
Owner CONVION OY
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