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[EnergyPlus_Support] FCU fan sizing
- To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
- Subject: [EnergyPlus_Support] FCU fan sizing
- From: <felipe@xxxxxxxxxx>
- Date: 23 Dec 2013 09:26:32 -0800
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Dear Group,
I am trying to model a existing group of FCUs (7) with the following characteristis:
Max. Air Flow 1400 CFM x 7 = 9800 CFM
Fan power 252 W x 7 = 1764 W
So I ve got a a fan power per CFM of 0.18 W/CFM
When energy plus calculates the max. airflow it gives me 4788 CFM (half of the "real" installed equipment). I have tried to modify the maximum air flow rate but I have no been able to do it. So have tried to "force" the pressure rise so it gives me the total fan power with the half of the instaled maximum airflow rate I got 0.36 W/CFM.
Since I can not modify the maximum air flow rate, is it fair to size the FCU fan considering its fan power per CFM (0.18 W/CFM)? even though the sizing results will be half of the FCU actual power (882W instead of 1764 W)?
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