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Viscosity in pumps

1 Posts
2 Users
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Topic starter

Hi,
I am considering a pump component that accounts for the effect of inlet fluid viscosity on the required pumping power. Is there an existing component in TRNSYS or the TESS libraries that models this behaviour?

1 Answer
0

@shamsoddinghiami

In short, there is no pump model that considers a variable fluid viscosity.

The reason for this is that most models reference a pump curve that is created by manufactures for a specific fluid at a specific temperature. This curve is used to relate the pumping power to the flow rate through the pump. Therefore, a change in fluid viscosity will not impact the pumping power if the pump curve is unchanged.

It is also worth noting that viscosity is considered in pipe models to calculate the heat transfer coefficient, but pressure drop is not calculated.

cheers,

John

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