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Control method and device of SOFC system, and FCU

A control method and control valve technology, which is applied in the field of control of FCU and SOFC systems, can solve the problems of not being able to adapt to different types and concentrations of natural gas fuels, etc.

Inactive Publication Date: 2020-09-29
WEICHAI POWER CO LTD
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Problems solved by technology

[0005] In view of this, the embodiments of the present invention provide a control method, device and fuel cell system controller (Fuel cell Control Unit, FCU) of a SOFC system to solve the problem that the existing technology cannot meet the needs of different types and concentrations of natural gas fuels. question

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  • Control method and device of SOFC system, and FCU
  • Control method and device of SOFC system, and FCU
  • Control method and device of SOFC system, and FCU

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "compr...

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Abstract

The invention provides a control method and device for an SOFC system, and an FCU. The method comprises steps of obtaining the mass flow of fuel according to a current target value needed by an SOFC stack and a molar ratio determined based on detected natural gas fuel components; obtaining water mass flow based on the fuel mass flow and the water-carbon ratio meeting the reforming requirement; controlling the opening degree of a second control valve according to the fuel mass flow, and controlling the opening degree of a third control valve according to the water mass flow; and detecting the temperature of the SOFC stack in real time, and controlling the opening degree of the first control valve according to the temperature of the SOFC stack. The method is advantaged in that natural gas fuel components are detected, and the molar ratio of the natural gas fuel components is determined, required fuel mass flow and water mass flow are calculated according to the molar ratio of the naturalgas fuel components, the current target value and the water-carbon ratio so that opening degrees of the control valves of the fuel and the deionized water are conveniently controlled, the opening degree of the control valve corresponding to air is controlled according to the temperature of the SOFC stack, the damage speed of an SOFC system is reduced, and the conversion rate of natural gas fuel can be increased.

Description

technical field [0001] The invention relates to the technical field of machinery industry, in particular to a control method, device and FCU of an SOFC system. Background technique [0002] Solid Oxide Fuel Cell (SOFC) is a device that efficiently converts the chemical energy of hydrocarbons in natural gas fuel and oxidant into electrical energy at medium and high temperatures. [0003] At present, the type and concentration of natural gas fuel are often determined in advance through laboratory testing. However, in practical applications, the type and concentration of natural gas fuel on the market fluctuate greatly. On the one hand, the conversion rate of the actual natural gas fuel in the SOFC system is likely to be too high, resulting in increased attenuation or damage to the SOFC system; on the other hand, the conversion rate of the actual natural gas fuel in the SOFC system is likely to be too low. [0004] Therefore, how to provide a control scheme for the SOFC system...

Claims

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Application Information

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IPC IPC(8): H01M8/04291H01M8/0432H01M8/0444H01M8/04746H01M8/1233H01M8/22H01M8/2457
CPCH01M8/04753H01M8/0444H01M8/04291H01M8/2457H01M8/22H01M8/0432H01M8/1233H01M2008/1293Y02E60/50H01M8/04365H01M8/04447H01M8/04835H01M8/04589H01M8/04776H01M8/0618H01M8/04388
Inventor 于超沈雪松
Owner WEICHAI POWER CO LTD
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