Simscape: thermal liquid pump

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Nikolay Panasetsky 2016-8-22

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https://ww2.mathworks.cn/matlabcentral/answers/300474-simscape-thermal-liquid-pump

评论： Yifeng Tang 2022-7-12

Hello!

I have the oil flow rate data in the centrifugal pump (for the transformer's cooling system).

But I haven't found any useful pumps in which I can use this data, only pressure and mass flow sources.

Is there any pump blocks, that could be handy?

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Answer 1

Yifeng Tang 2022-7-1

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In newer versions of Simscape Fluids, there are more pump modules available.

In general, the pump can be modeled by using look up tables of rpm, pressure ratio/difference, and flowrate. One can set up pressure sensors at the two ends of the ideal flow source, send the pressure signal to a LUT that will give you the flowrate, which can be then sent to the source block.

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Andreas 2022-7-12

@Yifeng Tang like this:

Yifeng Tang 2022-7-12

I usually do this:

where delta_P drives the flow rate. But I think your way, flow rate drives delta_P, would work as well. Any observation you could share?

Couple notes:

adding another dimension of pump RPM allows you to turn off and adjust the pump output.
If your MATLAB version allows, use isothermal liquid instead of hydraulics. https://www.mathworks.com/help/physmod/simscape/ug/upgrading-hydraulic-models-to-use-isothermal-liquid-blocks.html

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