How to make a humidifier on Simulink

Question

Ennes Khatter 2023-10-4

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2029009-how-to-make-a-humidifier-on-simulink

评论： Jon 2023-10-4

Good day everyone,

I would like to model a humdififcation system on Simulink without need to use Simscape, I want the model also to control the level of Relative humidify for PEM Fuel Cell and return as well the power requirment of the humidifier.

I can't seem to find any online source or paper that showed how to model a humdification system on Simulink.

Many thanks in advance

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Answer 1

Jon 2023-10-4

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https://ww2.mathworks.cn/matlabcentral/answers/2029009-how-to-make-a-humidifier-on-simulink#answer_1325559

Looking quickly I think these two model humidifiers using Simulink without Simscape.

https://huei.engin.umich.edu/wp-content/uploads/sites/186/2015/02/A-Thermodynamic-Model-of-Membrane-Humidifiers-for-PEM-Fuel-Cell-Humidification-Control.pdf

https://www.diva-portal.org/smash/get/diva2:542303/fulltext01.pdf

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Ennes Khatter 2023-10-4

Thanks a lot @Jon. The first paper I know it but I failed in modelling on Matlab, the second website looks intresting, I am going through the Pdf. Do you have a built-in model already for a humdifier?

Thanks for the help

Jon 2023-10-4

Sorry, no I don't have a humidifier model, I was just curious so I google searched to find the references I gave to you. In general, if you have a system of ode's (Ordinary Differential Equations) describing the evolution of the states of a dynamic system, you can build a Simulink model based upon the ODE's.

You probably are already familiar with this, but, the idea is that if I have a system of ODE's

dx1/dt = f(x1,x2,....)

dx2/dt = f(x1,x2,...)

etc

You then use an integrator block for each term, dx1/dt, dx2/dt, ...

The output of each integrator block is the corresponding xi, for example the output of the integrator block corresponding to dx2/dt would be x2

You then build up the inputs to each integrator block, using the output states from the integrator blocks, along with any additional external inputs.

So if a paper provides a model for a non-linear system, whether it is a humidifier or anything else, in the form of a set of ode's, it is pretty straightforward to make a Simulink model and simulate it.

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