Energy consumption of fans is as high as the cooling energy consumption when modeling a commercial VRF air conditioner.
I'm modelling an VRF air conditioner following the classes using in the example VariableRefrigerantFlow_5Zoneand using the commercials models of the library NRREL (https://bcl.nrel.gov/) for the internal and external units. In all the cases as a result I'm obtaining that the electric consumption of the fans is nearly equal to the cooling energy consumption. Is this normal?
For example, Electricity [GJ]:
- Cooling = 86,63
- Heating = 20,77
- Fans = 96,82.
Comments
What is the schedule and total static pressure on the VRF unit fans?
I'm using the Fan:ConstantVolume, the Availability Schedule I'm using is always 1, but I already verify that the fan is only available when the terminal unit is working. The Pressure Rise is the default: 600 Pa. The Fan Electric Energy is always the same:
Date/Time TUS11 VRF SUPPLY FAN:Fan Electric Energy J 07/21 01:00:00 0 07/21 02:00:00 0 07/21 03:00:00 0 07/21 04:00:00 0 07/21 05:00:00 0 07/21 06:00:00 0 07/21 07:00:00 0 07/21 08:00:00 0 07/21 09:00:00 993,989 07/21 10:00:00 993,989 07/21 11:00:00 993,989 07/21 12:00:00 993,989 07/21 13:00:00 993,98