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EnergyPlus method to model horizontal insulating curtains

asked 2018-05-09 07:29:43 -0500

RCulham gravatar image

updated 2018-05-10 11:38:34 -0500

I would like to model, preferably in EnergyPlus, horizontal black out insulating curtains in a greenhouse application.

To me this is an interesting modelling challenge as it creates a space with a vaulted ceiling going from essentially from 1 zone to 2 zones when the horizontal curtains at the roof hip level are closed with the interface having a U-value step change. Since these curtains are horizontal and the roof is sloping, they are not parallel to the glazing. The curtains would be controlled by a time of day schedule as a function of sunrise, sunset.

In the same application, I will model horizontal reflective curtains, which are also not parallel to the roof glazing using the EnergyPlus daylight algorithm.

Your suggestions are most welcome.

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answered 2018-05-09 09:35:56 -0500

Review the WindowProperty:ShadingControl object inputs, which should have the capability you are looking for.

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answered 2018-05-15 21:05:59 -0500

RCulham gravatar image

The primary parameter in this Greenhouse is the lighting level as opposed to the potential energy savings of the horizontal back out insulating curtains. Horizontally splitting the space in two zones under black out insulating curtains would affect the control function of the day light sensor in the primary growing space below the hip in the roof. An interim solution is to simplify model and use the WindowProperty:ShadingControl object as suggested by Eric Ringold

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Asked: 2018-05-09 07:29:43 -0500

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Last updated: May 15