[TRNSYS-users] How to calculate pump rated flow rate and rated power

[via TRNSYS-users]

Dear users,
In the TESS example "TESS HVAC Library Examples ‐ Restaurant with Solar Absorption Cooling" I don't understand the sizing of the pumps (rated flow rate and rated power).The question is how to calculate these quantities? - in the heating loop there is a 580kg/h and a 1080kg/h pumps- in the cooling loop (cooling tower) : 5168kg/h- in the building loop 1500kg/h - for the fan coil 4312kg/h
Where these quantities come from ?
Thank you
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