Modelling Underfloor Ventilation (UFAD) Systems

asked 2016-04-20 21:07:49 -0500

buddy1187
201 ●1 ●3

updated 2016-04-21 07:25:04 -0500

MatthewSteen

10077 ●18 ●25 https://www.nrel.gov/b...

Hello,

I've searched and searched for an answer to my question, but I have not found anything related to this. I am using Sketchup 2016, Open Studio 1.11.0, and latest version of EnergyPlus The building I am modelling has underfloor ventilation systems (with supply diffusers) on the first, second, and third floor. When I am modelling the building shell and spaces, should I physically model the supply and return plenums associated with the Underfloor Ventilation System? Thanks in advance!

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Welcome @buddy1187. I've retagged your question using existing ones and naming conventions. Please always tag your questions with the software you're using. If you haven't already, you can click the "plenum" tag to see all related previous questions.

MatthewSteen ( 2016-04-21 07:29:38 -0500 )edit

Ok, thank you I will remember that for my next post :)

buddy1187 ( 2016-04-21 08:14:48 -0500 )edit

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answered 2016-04-21 10:11:32 -0500

Julien Marrec

29042 ●85 ●74 http://www.effibem.com/

A good place to start looking for answers is to look at the Example Files provided with EnergyPlus.

5ZoneSupRetPlenRAB.idf and 5ZoneSupRetPlenVSATU.idf are meant to illustrate how to model UFAD systems.

Open them up, you'll see that the underfloor plenums are indeed explicitly modeled.

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Thank you for pointing me in the right direction!

buddy1187 ( 2016-04-22 14:09:04 -0500 )edit

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answered 2016-04-22 09:26:29 -0500

970 ●1 ●8

updated 2016-04-22 09:27:04 -0500

IES VE has a clear explanation about how to set up the system and space for UFAD system. Although the software is different from OS, I believe the core idea and heat transfer principals are very similar.

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