Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The fans do have an actuator Fan for Fan Air Mass Flow Rate. The value must be between the maximum and minimum fan flow rate and the fan must be available to operate. Unfortunately I don't see an example in the EMSApplicationGuide.pdf.
| | 2 | No.2 Revision |
The fans do have an actuator Fan for Fan Air Mass Flow Rate. The value must be between the maximum and minimum fan flow rate and the fan must be available to operate. Unfortunately I don't see an example in the EMSApplicationGuide.pdf.
However, setting the fan air mass flow rate is not the only consideration. The type of terminal unit used at the zone level may also have an impact on the air flow rate. As described in the link above, the EMS actuator for the terminal unit can also control air flow rate, thereby eliminating the need to control the fan since air flow at the zone level returns to the fan inlet.
| | 3 | No.3 Revision |
The fans do have an actuator Fan for Fan Air Mass Flow Rate. The value must be between the maximum and minimum fan flow rate and the fan must be available to operate. Unfortunately I don't see an example in the EMSApplicationGuide.pdf.
However, setting the fan air mass flow rate is not the only consideration. The type of terminal unit used at the zone level may also have an impact on the air flow rate. As described in the link above, the EMS actuator for the terminal unit can also control air flow rate, thereby eliminating the need to control the fan since air flow at the zone level returns to the fan inlet.
An example for a fan actuator:
EnergyManagementSystem:Actuator,
PSZ2_Fan_Mass_Flow_Rate, ! Name
PSZ-AC:2 My Supply Air Fan, ! Actuated Component Unique Name
Fan, ! Actuated Component Type
Fan Air Mass Flow Rate; ! Actuated Component Control Type
