Parameter adjusting method during load rise of solid oxide fuel cell

A solid oxide, fuel cell technology, applied in fuel cells, fuel cell additives, fuel cell control, etc., can solve the problems of large-scale popularization and application of SOFC systems, fuel deficit, and strict power generation efficiency requirements of SOFC systems, and achieve Overcome the insufficiency of operating experience and knowledge, provide good guidance, and ensure the effect of service life and operational safety

Active Publication Date: 2021-12-14
AIR FORCE EARLY WARNING ACADEMY
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AI Technical Summary

Problems solved by technology

[0003] The SOFC system has extremely strict requirements on its power generation efficiency. At the same time, when the external load power increases, it is easy to cause a fuel shortage due to the delay in fuel transmission.
These two problems are the primary core problems that plague the large-scale promotion and application of SOFC systems

Method used

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  • Parameter adjusting method during load rise of solid oxide fuel cell
  • Parameter adjusting method during load rise of solid oxide fuel cell
  • Parameter adjusting method during load rise of solid oxide fuel cell

Examples

Experimental program
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specific Embodiment 1

[0037] see figure 2 , build a 5kW SOFC system model based on the composition of the SOFC system. It includes a blower 1 , a heat exchanger 2 , an electric stack 3 , an exhaust combustion chamber 4 and a power converter 5 ; wherein the power converter 5 is connected to an external load 6 . The optimal operating point under different power levels is determined by an optimization algorithm. Table 1 lists the optimal operating points and efficiencies of SOFC systems at different power levels.

[0038]

[0039] Solid oxide fuel cells provide electrical energy for external loads, assuming that the external load power is From 2kW to 4kW, the corresponding optimal operating points are (20,0.1, 0.01543, 0.19841) and (44,0, 0.03419,0.43649). SOFC system fuel delay time , at this time the operating parameters , ， Step conversion is performed directly, assuming that the initial current regulation time is , then the current rising rate is 0.24 A / s, and the stack current ...

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Abstract

The invention provides a parameter adjusting method during load rise of a solid oxide fuel cell. The method comprises the step of: when the external load power of the solid oxide fuel cell is increased, searching an optimal operation point of initial power P0 and final power P1 under a static condition through adopting a static optimization algorithm on the basis of fixed fuel transmission delay time of the solid oxide fuel cell. According to the parameter adjusting method, the optimal operation point under different power conditions can be determined, current switching tracks of a stack under the condition that power switching is not passed are obtained, and reference is provided for management of a hybrid power system of an SOFC system and other energy systems.

Description

technical field [0001] The invention relates to the field of hybrid power system management, in particular to a parameter adjustment method when the load of a solid oxide fuel cell rises. Background technique [0002] Solid oxide fuel cell (Solid Oxide Fuel Cell, referred to as SOFC) is a third-generation fuel cell, which is an all-solid-state device that directly converts chemical energy stored in fuel and oxidant into electrical energy in an efficient and environmentally friendly manner at medium and high temperatures. Chemical power plant. It has the advantages of high power density, strong fuel adaptability, all-solid structure, simple equipment, no limitation of Carnot cycle, and high conversion efficiency. Its successful application has great practical significance for alleviating the energy crisis, meeting the power demand, protecting the ecological environment and ensuring national security. [0003] The SOFC system has extremely strict requirements on its power ge...

Claims

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Application Information

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IPC IPC(8): H01M8/04298H01M8/0438H01M8/04537H01M8/04746
CPCH01M8/04305H01M8/04388H01M8/04395H01M8/04589H01M8/04402H01M8/04753H01M2008/1293Y02E60/50
Inventor 张琳汪枫谢超王党卫张成胜刘润华王晋晶周伟彬谢家伟张政国
Owner AIR FORCE EARLY WARNING ACADEMY
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