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Can I use EMS to change conductivity of a transparent insulation material determined by temperature differences

asked 2016-04-27 09:04:08 -0500

stacy_imy gravatar image

updated 2016-11-10 11:07:15 -0500

Hi there, I'm working on a project about applying a Transparent Insulation Material (TIM) between two glazing panes. I've already got an regression formula of the dynamic conductivity through CFD calculation and got its BSDF through Radiance. Now, I want to model this material in E+ by combining the thermal property form CFD and optical property from Radiance to conduct a building performance simulation.

For the thermal part, the conductivity of the martial is determined by temperature difference between the two glazing panes and mean temperature of them. By using EMS, I know, I might be able to set two sensors to read the outside and inside surface temperatures of these two glazing panes. But I can't find an actuator related to the conductivity of a material. In this case, is it possible to adjust the conductivity of this material?

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answered 2016-04-28 10:51:39 -0500

Archmage gravatar image

The approach that is available in EnergyPlus is to swap out entire constructions rather than change the material properties of a material inside a construction. For BSDF glazing, you would set up a series of Construction:ComplexFenestrationState objects that have the material conductivity changes included in them. Then EMS switches the construction over time using the EMS actuator Surface Construction State.

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Thank you very much for your answer, it is very useful. Now, I totally understand that I need to use EMS to change the entire construction over time. Many thanks again.

stacy_imy gravatar image stacy_imy  ( 2016-04-28 11:59:26 -0500 )edit

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Asked: 2016-04-27 09:04:08 -0500

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Last updated: Apr 28 '16