[EnergyPlus_Support] Time Setpoint Not Met and Zone Multiplier

[Carolina Galeazzi <caro_poa@xxxxxxxxxxxx>]

Dear All,

 I am simulating an existing building, with 14 floors in total but 8 of them are identical floors. For these, I have modeled one typical floor and used a multiplier of 8 in each zone to represent all floors. However, I was having huge time setpoint not met (I am autosizing all capacities and flow rates). I simulated the building again without the multiplier, this has decreased the setpoint to below 300 unmet hours, as it should be regarding ASHRAE 90.1.

 Please correct me if I am wrong, but I understand that only the zones were multiplied, not the AHU that I have for each floor, because the multiplier was defined within the zone.

 My question is: Is there a way that I could use the multiplier also for the AHUs that are connected to these multiplied zones, to have a correct result of total load? Or should I not use multiplier and multiply the load of the typical floors by 8 â??by handâ?? (not sure if this is acceptable though)?

Thank you in advance for your feedback and suggestions,

Carolina

 

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