A visual processing method for pemfc cathode channel water based on image processing

Abstract

The invention discloses a PEMFC cathode flow channel water visualization processing method based on image processing, comprising: step 1, establishing a model of the shape of the cathode flow channel of a proton exchange membrane fuel cell; step 2, performing performance simulation on different cathode flow channel shape models ; Step 3, use 3D printing technology to print out the actual models of different cathode flow channel shapes, first fill the different heights of the flow channel with distilled water added with dyeing agent, and use a high-speed camera to shoot and shoot the empty flow channel model without water injection Step 4, obtain the gray value of the image that step 3 obtains, establish the corresponding functional relationship between the gray value and the ratio between the liquid water height of the flow channel and the height of the flow channel; Step 5, carry out the drainage experiment under the corresponding parameters, and obtain The actual drainage process diagram of different cathode flow channel shape models at the corresponding time is obtained; step 6, the drainage effect diagram of different cathode flow channel shape models and the water content in the flow channel are obtained.

Description

Technical field[0001]The invention relates to a visual processing method for PEMFC cathode flow channel water based on image processing, in particular to a method for evaluating the drainage performance of the cathode flow channel of a proton exchange membrane fuel cell by obtaining a false color image through image processing.Background technique[0002]Proton exchange membrane fuel cell (PEMFC) uses hydrogen-oxygen mixed reaction to generate electricity. It has many advantages such as good low-temperature cold start, no pollution, high energy conversion efficiency, and good reliability. It is recognized as the first choice for automobile energy in the future. According to its working principle, it can be known that the water produced is mainly concentrated on the cathode (1 / 2O2+2H++2e-→H2O+ heat). If the cathode flow channel has poor drainage capacity, the cathode flow channel will be flooded, which will block the flow channel, affect the overall mass transfer of the fuel cell and r...

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Problems solved by technology

According to its working principle, it can be seen that the water produced is mainly gathered in the cathode (1 / 2O 2 +2H + +2e - →H 2 O+ heat), if the drainage capacity of the cathode flow channel is poor, the cathode flow channel will be flooded, resulting in blockage of the flow channel, affecting the overall mass transfer of the fuel cell and reducing its performance. If the drainage capacity of the cathode flow channel is too fast , it is easy to cause water shortage in the fuel cell membrane, which makes the proton exchange membrane dry, reduces the proton conductivity, increases the internal resistance of the membrane, and also reduces the performance of the fuel cell

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