A construction method and application of a two-dimensional temperature distribution observer for cross-flow stacks

A technology of temperature distribution and construction method, used in electrochemical generators, circuits, fuel cells, etc., can solve the problem of difficult to obtain accurate temperature distribution, and achieve the effect of ensuring accuracy and high accuracy of results

Active Publication Date: 2021-04-20
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The invention provides a method for constructing a two-dimensional temperature distribution observer of a cross-flow stack and its application to solve the technical problem that the temperature distribution in the existing cross-flow stack is difficult to obtain accurately

Method used

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  • A construction method and application of a two-dimensional temperature distribution observer for cross-flow stacks
  • A construction method and application of a two-dimensional temperature distribution observer for cross-flow stacks
  • A construction method and application of a two-dimensional temperature distribution observer for cross-flow stacks

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Embodiment 1

[0043] A construction method 100 for a two-dimensional temperature distribution observer of a cross-flow stack, such as figure 1 shown, including:

[0044] Step 110, dividing the cross-flow stack into multi-node equal-area elements, and establishing a two-dimensional dynamic mechanism model based on the dynamic mechanism of the cross-flow stack;

[0045] Step 120, based on the actual time response characteristics of the cross-flow stack, discretize the two-dimensional dynamic mechanism model to obtain a two-dimensional dynamic discretized mechanism model;

[0046]Step 130, respectively input the stack input to the UKF estimation algorithm and the discretization mechanism model; the discretization mechanism model and the UKF estimation algorithm respectively obtain the actual value and the estimated value of the temperature at all nodes based on the stack input; the UKF estimation algorithm Based on the actual value and evaluation value corresponding to each exit node, correct...

Embodiment 2

[0131] A two-dimensional temperature distribution observation method for a cross-flow stack, comprising:

[0132] Using any method for constructing a two-dimensional temperature distribution observer for a cross-flow stack as described in Embodiment 1, construct a two-dimensional temperature distribution observer for a cross-flow stack to be tested; input the cross-flow stack to be measured The stack input of the galvanic stack and the measurable output temperature of the stack outlet node, the two-dimensional temperature distribution observer calculates the measured cross galvanic current based on the stack input and the measurable output temperature of the stack outlet node The temperature distribution of the stack at the stated stack input.

[0133] This embodiment adopts the observer construction method described in Embodiment 1 to obtain a two-dimensional temperature distribution observer. The above construction method is based on the actual cross-flow stack to be tested ...

Embodiment 3

[0136] A storage medium, in which instructions are stored, and when the computer reads the instructions, the computer is made to execute any method for constructing a cross-flow stack two-dimensional temperature distribution observer as described in Embodiment 1 and / or Or any two-dimensional temperature distribution observation method of a cross-flow stack as described in Embodiment 2.

[0137] The relevant technical solutions are the same as those in Embodiment 1, and will not be repeated here.

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Abstract

The invention discloses a method for constructing a two-dimensional temperature distribution observer of a cross-flow stack and its application, including: dividing the stack into multi-node equal-area elements and establishing a two-dimensional dynamic mechanism model; discretizing the two-dimensional dynamic mechanism model The two-dimensional dynamic discretization mechanism model is obtained; the discretization mechanism model and the UKF estimation algorithm are based on the input of the stack, and the actual values ​​and evaluation values ​​of the temperatures at all nodes are obtained; the UKF estimation algorithm is based on the actual values ​​and evaluation values ​​corresponding to each outlet node, The evaluation values ​​corresponding to all nodes are corrected to obtain predicted values, and the cycle is repeated until the deviations between the predicted values ​​corresponding to all nodes and the actual values ​​are within the preset range, and the construction of the two-dimensional temperature distribution observer is completed. The invention divides the cross-flow stack into multiple nodes and constructs a two-dimensional dynamic mechanism model, uses the UKF estimation algorithm to accurately and quickly estimate the internal temperature distribution of the cross-flow stack, has good anti-input disturbance performance, and is the temperature of the cross-flow SOFC stack Distributed observations provide a viable solution.

Description

technical field [0001] The invention belongs to the technical field of fuel cell temperature distribution estimation, and more specifically relates to a method for constructing a two-dimensional temperature distribution observer of a cross-flow stack and its application. Background technique [0002] The solid oxide fuel cell (SOFC) power generation system is an all-solid-state chemical power generation device that can directly convert the chemical energy stored in fuel and oxidant into electric energy efficiently and cleanly, because of its high efficiency, pollution-free, all-solid-state , wide range of fuel and other advantages, in the military, transportation, power stations and other fields have broad application prospects. Among them, the SOFC stack is the core component of the power generation system, and its safe, stable, and efficient operation is the key to the practical application of the SOFC power generation system. [0003] Due to the high operating temperatur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04298H01M8/0432
CPCH01M8/04305H01M8/04365Y02E60/50
Inventor 蒋建华吴小东赵玮琪成天亮李曦邓忠华李箭
Owner HUAZHONG UNIV OF SCI & TECH
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