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How to calculate the rated power for single-speed pump (TYPE 114) for a given flow rate in TRNSYS.

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Topic starter

The default parameters for this TYPE 114 are a rated flow rate of 1000kg/hr and a rated power of 2684 kJ/hr, giving a ratio of 2.684 kJ/kg. This ratio has been seen to be maintained with different flow rates used in the four pumps used in the file restaurant with solar absorption cooling in tess hvac example library.

I would like to know the basis for this particular ratio of 2.684. If there is any other method to calculate the rated power for a pump for a particular flow rate, that would also be great.

Thanks

Aditi

This topic was modified 8 months ago by Aditi_Garg
1 Answer
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Aditi,

 I am not sure where those defaults come from. The power drawn by a pump when operating is most correctly calculated from knowing the head against which it pushes. When I do not have that information I will typically use a rule of thumb of about 300 W/Lps or 19W/gpm.

kind regards,

 David

 

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