.Buildings.Controls.OBC.ASHRAE.G36.AHUs.MultiZone.VAV.SetPoints.SupplySignals

Information

Block that outputs the supply temperature control loop signal, and the coil valve postions for VAV system with multiple zones, implemented according to Section 5.16.2.3 of the ASHRAE Guideline G36, May 2020.

The supply air temperature control loop signal uTSup is computed using a PI controller that tracks the supply air temperature setpoint TSupSet. If the fan is off, then uTSup = 0.

Heating valve control signal (or modulating electric heating coil if applicable) yHeaCoi and cooling valve control signal yCooCoi are sequenced based on the supply air temperature control loop signal uTSup. From uTSup = uHea_max to uTSup = -1, yHeaCoi increases linearly from 0 to 1. Similarly, uTSup = uCoo_min to uTSup = +1, yCooCoi increases linearly from 0 to 1.

The output uTSup can be used in a controller for the economizer.

Revisions

• August 1, 2020, by Jianjun Hu:
  Updated according to ASHRAE G36 official release.
• November 1, 2017, by Jianjun Hu:
  First implementation.