How the chiller performance curve affect to plant sizing calculation

asked 2017-05-04 09:12:44 -0600

2085 ●1 ●4 ●14

Hi!
Based on the idf file which already run successfully, I just changed 3 performance curve for chiller:Electric:EIR and tried to run again.
However, I got following error at plant sizing calculation.
* Warning * Check input. Pump nominal power or motor efficiency is set to 0, for pump=CHW VAR SPD PUMP SD1 * Warning * Check input. Pump nominal flow rate is set or calculated = 0, for pump=CHW VAR SPD PUMP SD1 * Warning * SizePlantLoop: Calculated Plant Sizing Design Volume Flow Rate=[1.73E-016] is too small. Set to 0.0 * ~~~ * ..occurs for PlantLoop=SD1 CW LOOP * Warning * SizePump: Calculated Pump Nominal Volume Flow Rate=[1.73E-016] is too small. Set to 0.0 * ~~~ * ..occurs for Pump=CW VAR SPD PUMP SD1

I tried to understand how plant sizing calculation is executed in engineering reference. But I cannot find any clue why changing chiller performance curve lead to this error.
Does anyone know any clue why this error is happening?

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Comments

Thank you for your reply. I found that I wrongly input Sizing factor very small in Chiller:Electric:EIR which caused this error. It was not related to performance curve.