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Fuel cell system and method of load following operation of the same

A fuel cell system and fuel cell technology, applied in fuel cells, fuel cell additives, solid electrolyte fuel cells, etc., can solve problems to be improved, and achieve the effect of preventing flow path blockage and reliable conversion

Inactive Publication Date: 2013-05-08
JX NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the technologies disclosed in Patent Documents 2 and 3, there is still room for improvement in terms of reliable conversion.

Method used

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  • Fuel cell system and method of load following operation of the same
  • Fuel cell system and method of load following operation of the same
  • Fuel cell system and method of load following operation of the same

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Embodiment Construction

[0061] The fuel cell system used in the present invention has a reformer that converts a hydrocarbon-based fuel to produce a hydrogen-containing gas, and a high-temperature fuel cell. The reformer has a reforming catalyst layer. The hydrogen-containing gas obtained from the reformer is called reformed gas. Shifting catalysts include shifting catalysts that can facilitate shifting reactions. High-temperature fuel cells use the hydrogen-containing gas (reformed gas) obtained from the reformer to generate electricity.

[0062] Hereinafter, although the form of this invention is demonstrated using drawing, this invention is not limited to this.

[0063] [Indirect internal transformation type SOFC system]

[0064] figure 1 One mode of the indirect internal conversion type SOFC that can implement the present invention is schematically shown in . Here, although an indirect internal conversion type SOFC system is described, the present invention can also be applied to an external...

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Abstract

Provided is a method of load following operation of a fuel cell system in which reliable reforming and the prevention of flow blockage and anode degradation are possible. Functions F = f(P) and P = f -1 (F) of an electrical output P and a hydrocarbon-based fuel flow rate F required to output P are beforehand obtained, and a reformable fuel flow rate F R is calculated from the measured temperature of the reforming catalyst layer. When F R < F min (the minimum value of the fuel flow rate), electric power generation is stopped. When F R ‰¥ F min , the following 1 is performed if an output demand value P D is equal to or less than a cell maximum output P M , and the following 2 is performed if P D > P M . 1) When f(P D ) ‰¤ F R , the cell output is set to P D , and the feed fuel flow rate is set to f(P D ). When f(P D ) > F R , the cell output is set to the maximum value within a range of less than P D amongst P calculated from P = f -1 (F R ), and the feed fuel flow rate is set to F R . 2) When f(P M ) ‰¤ F R , the cell output is set to P M , and the feed fuel flow rate is set to f(P M ). When f(P M ) > F R , the cell output is set to the maximum value amongst P calculated from P = f -1 (F R ), and the feed fuel flow rate is set to F R . Also provided is a fuel cell system appropriate for this method.

Description

technical field [0001] The present invention relates to a fuel cell system for generating electricity using reformed gas obtained by reforming hydrocarbon-based fuels such as kerosene. Background technique [0002] In a solid oxide fuel cell (Solid Oxide Fuel Cell. Hereinafter also referred to as SOFC depending on the situation.) system, generally includes a hydrogen-containing gas (reformed gas) for converting hydrocarbon-based fuels such as kerosene or city gas. ), and an SOFC for electrochemically generating electricity from the reformed gas and air. [0003] SOFC generally operates at a high temperature of 550 to 1000°C. [0004] Various reactions such as steam reforming (SR), partial oxidation reforming (POX), and autothermal reforming (ATR) can be utilized for reforming, but in order to use reforming catalysts, heating to a temperature at which catalytic activity develops is required. [0005] Water vapor conversion is a very large endothermic reaction. In addition, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04C01B3/38H01M8/06H01M8/12
CPCH01M8/0618C01B3/384H01M8/04955H01M8/04373H01M8/0494C01B2203/169Y02E60/50H01M8/04776C01B2203/085C01B2203/066C01B2203/1288H01M8/0491C01B2203/1619H01M8/04425C01B2203/1685H01M8/04589Y02E60/525H01M8/04992H01M2008/1293C01B2203/0233
Inventor 旗田进
Owner JX NIPPON OIL & ENERGY CORP