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How can I model Electrochromic glazing that switch between 4 mode?

asked 2016-04-24 07:17:56 -0500

maryam's avatar

updated 2017-06-04 10:27:18 -0500

I Know that I must use EMS, but I don't know How, I used "EnergyManagementSystem:ConstructionIndexVariable" For EMS and I Create 4 window of 4 steps in 'Construction' but I have an error warning that said:"There are 3 nominally unused constructions in input" that was related to my windows. I am afraid of modeling on wrong way and Energy plus ignore other 3 steps, should I use only "EnergyManagementSystem:ConstructionIndexVariable"? or I need to fill others EMS subdivisions? I'd be appreciate if someone help me.

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Search ExampleFiles.html (in "C:\EnergyPlusV8-4-0\ExampleFiles" folder) for 'electrochromic'. PurchAirWithDaylighting.idf should very likely be the starting point.

Chandan Sharma's avatar Chandan Sharma  ( 2016-04-24 23:44:16 -0500 )edit

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answered 2016-04-25 01:04:30 -0500

Roel Loonen's avatar

The example EMSThermocromicWindow.idf seems the best starting point. It constains 19 different switchable window states, that are controlled via "EnergyManagementSystem:ConstructionIndexVariable". You would need to transform the control strategy in "EnergyManagementSystem:Program" into something that meets your requirements, i.e. likely not based on window pane temperature.

You may want to take a look at our recent article: "Review of current status, requirements and opportunities for building performance simulation of adaptive facades", for additional considerations.

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answered 2016-10-08 11:46:38 -0500's avatar

@Roel Loonen by using EMS for Switchable windows, it doesn't calculate the cooling loads for the zones .. can you help me with this ???

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answered 2021-03-13 11:26:31 -0500

Iswarya M Mohan's avatar

"EnergyManagementSystem:ConstructionIndexVariable" has to be used, since they form the bridging between the Constructions that you have created to the Actuator Output. There must be 4 variables for the same that points to each of the constructions you wish to switch.

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Asked: 2016-04-24 07:17:56 -0500

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Last updated: Mar 13 '21