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Test method for fuel cell stack heat capacity

A fuel cell stack and testing method technology, applied in the field of fuel cell stack thermodynamics, can solve the problems of complex auxiliary systems and large calculation errors, and achieve the effects of high test accuracy, avoidance of reference, and simple test methods

Active Publication Date: 2020-11-17
国鸿氢能科技(嘉兴)股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the calculation error is relatively large, and on the other hand, the auxiliary system is more complicated.

Method used

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  • Test method for fuel cell stack heat capacity
  • Test method for fuel cell stack heat capacity
  • Test method for fuel cell stack heat capacity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Water is selected for both the first liquid and the second liquid.

[0071] Put a certain type of 90-cell stack first calculate the heat capacity of the auxiliary parts: weigh the mass m of the auxiliary parts 2 It is 3633g, and the initial temperature of the test tank is T 1 41.3℃, water weight m 4 is 1124g, the initial temperature T of the stack 初堆 is 22.2°C, the initial temperature T of the stack water inlet 初堆入 is 22.6°C, the initial temperature T of the stack water outlet 初堆出 at 22.0°C, after 5 minutes of circulation, test the stack water inlet temperature T 堆入 is 36.4°C, the stack water outlet temperature T 堆出 is 36°C, the stack temperature T 堆 is 36°C, calculate the heat capacity of the auxiliary system as 484J / kg.k, and then calculate the heat capacity of the electric stack: weigh the mass m1 of the electric stack as 14200g, and weigh the mass m1 of the hot water 3 Pour 1521g into the water tank. When the temperature of the water tank is stable, the tempe...

Embodiment 2

[0073] The first liquid and the second liquid choose ethylene glycol

[0074] First calculate the heat capacity of the auxiliary parts for a certain type of 90-cell stack: Weigh the auxiliary parts as 3633g, the initial temperature of the water tank is 45.2°C, the weight of ethylene glycol is 1580g, the initial temperature of the stack is 21.4°C, and the stack The initial water inlet temperature is 21.2°C, the stack water outlet temperature is 21.3°C, the stack water inlet temperature is 37.6°C, the stack water outlet temperature is 37.4°C, and the stack water temperature is 37.8°C at the end of 5 minutes of circulation. Calculate the heat of the auxiliary system The capacity is 476J / kg.k, and then calculate the heat capacity of the stack: Weigh the total amount of the stack as 14200g, pour 1727g of hot water into the water tank, when the temperature of the water tank is stable, the temperature is 52°C, the initial temperature of the stack 22.4°C, after 5min cycle, the stack t...

Embodiment 3

[0076] A mixed solution of water and ethylene glycol is selected as the first liquid and the second liquid, and the mass ratio of water and ethylene glycol is 1:1.

[0077] First calculate the heat capacity of auxiliary parts for a certain type of 90-cell stack: Weigh the auxiliary parts as 3633g, the initial temperature of the water tank is 53.3°C, the water weight is 1670g, the initial temperature of the stack is 21.2°C, and the water inlet of the stack The initial temperature is 21.2°C, the stack water outlet temperature is 21.0°C, the stack water inlet temperature is 45.6°C at the end of 5min cycle, the stack water outlet temperature is 45.5°C, the stack temperature is 45.7°C, and the heat capacity of the auxiliary system is calculated as 480J / kg.k, and then calculate the heat capacity of the stack: Weigh the total amount of the stack as 14200g, pour 1890g of hot water into the water tank, when the temperature of the water tank is stable, the temperature is 58.6°C, and the ...

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Abstract

The invention relates to a test method for the thermal capacitance of an electric pile of a fuel cell, and belongs to the technical field of thermodynamics of the electric pile of the fuel cell. On the premise that heat insulation of a whole test system is ensured, The weight of the electric pile, the weight of an auxiliary system except the electric pile, the initial temperature of the electric pile, the first initial temperature of the auxiliary system, and the first temperature of the electric pile and the first temperature of the auxiliary system after that first liquid passes the electricpile are tested, , the determined values are substituted into a first thermal capacitance function to obtain an equation F (Cpile, Cauxiliary_system) of the total thermal capacitance; the second initial temperature of the auxiliary system and the second temperature of the auxiliary system after that second liquid passes the auxiliary system, and the determined temperatures are substituted to a second thermal capacitance function to obtain a thermal capacitance equation F (Cauxiliary_system) of the auxiliary system; and the equations (Cpile, Cauxiliary_system) and F (Cauxiliary_system) are carried out simultaneously to obtain the thermal capacitance of the electric pile. The test method is simple, and the precision is higher.

Description

technical field [0001] The invention belongs to the technical field of fuel cell stack thermodynamics, and in particular relates to a test method for the heat capacity of a fuel cell stack. Background technique [0002] The heat capacity of the fuel cell stack is an inherent physical property of the fuel cell stack. It has many applications, such as thermodynamic calculations, especially for the low-temperature start-up development of fuel cells. If the stack can be calculated simply and accurately The heat capacity of the system will be of great help to the low temperature start-up design of the system. [0003] There are few reports on the calculation of the heat capacity of the fuel cell stack. The usual calculation method is to calculate the overall heat capacity of the stack by accumulating the heat capacity of each component that makes up the stack. The disadvantage of this method is that The components of the stack are usually compounds or aggregates, and its heat ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04313H01M8/04992G01N25/48
CPCY02E60/50
Inventor 崔士涛燕希强瞿丽娟王继明孙注江王铎霖邓存柏严国尹
Owner 国鸿氢能科技(嘉兴)股份有限公司