I want to control the Air mass flow rate of VAV box. Is this viable in EnergyPlus?

asked 2018-11-02 09:43:22 -0500

Fan
81 ●2 ●5

updated 2018-11-02 13:25:14 -0500

__AmirRoth__

4436 ●5 ●17 http://bleedinggreenna...

I want to control the Air mass flow rate of VAV box. We know in E+, a controller:WaterCoil is used to control the outlet air temperature of VAV box to meet the temperature setpoint. For some reasons, I am planning to control both the temperature and mass flow rate of the supply air on the outlet node of VAV box. Is this viable in EnergyPlus? If so, how can I realize this?

Thanks in advance.

answered 2018-11-02 10:01:48 -0500

rraustad

13599 ●72 ●12 http://www.fsec.ucf.edu/

Overriding the simulation result can be accomplished using the Energy Management System in EnergyPlus. See the EMSApplicationGuide documentation for more information. The only actuator I see for VAV boxes is for the AirTerminal:SingleDuct:ConstantVolume:NoReheat object. There are multiple example files, all starting with EMS*.idf, that can be used to get familiar with EMS programming. Once your up to speed you can customize controls that are not currently available in E+.

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But this object--AirTerminal:SingleDuct:ConstantVolume:NoReheat is for CAV system, isn't it??

Fan ( 2018-11-02 10:08:20 -0500 )edit

It is typically used that way, but if you are controlling the air mass flow rate through this object it acts like a VAV box. You won't have access to a VAV box heating coil but if the controls are correct then you shouldn't need reheat.