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[EnergyPlus_Support] Discussion on EMS use in Energyplus on Opening factor Control

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Subject: [EnergyPlus_Support] Discussion on EMS use in Energyplus on Opening factor Control
From: "shahaohan@xxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Date: 08 Nov 2018 11:50:26 -0800
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When I'm checking the simulation example in the energyplus, I found a EMS problem relating to the opening factor Control. In theEMSAirflowNetworkOpeningControlByHumidity.idf, the example file shows a EMS control to the surface:Zn001:Wall001:Win001 by humidity. At the same time, the example file set a venting availability schedule in the Zone Level to control the Opening time. The Venting schedule is below:

Schedule:Compact, VentingSched, !- Name Fraction, !- Schedule Type Limits Name Through: 12/31, !- Field 1 For: AllDays, !- Field 2 Until: 7:00,1.0, !- Field 3 Until: 17:00,0.0, !- Field 5 Until: 24:00,1.0; !- Field 7

The EMS control code is below:

EnergyManagementSystem:Sensor, ZoneRH, !- Name Zone 1 Node, !- Output:Variable or Output:Meter Index Key Name System Node Relative Humidity; !- Output:Variable or Output:Meter Name
EnergyManagementSystem:Actuator, MyOpenFactor, !- Name Zn001:Wall001:Win001, !- Actuated Component Unique Name AirFlow Network Window/Door Opening, !- Actuated Component Type Venting Opening Factor; !- Actuated Component Control Type
EnergyManagementSystem:ProgramCallingManager, RH Controlled Open Factor, !- Name BeginTimestepBeforePredictor, !- EnergyPlus Model Calling Point RH_OpeningController; !- Program Name 1
EnergyManagementSystem:Program, RH_OpeningController, !- Name IF ZoneRH < 25, !- Program Line 1 SET MyOpenFactor = 0.0, !- Program Line 2 ELSEIF ZoneRH > 60, !- SET M

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Posted by: shahaohan@xxxxxxx

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