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How to consider the impact of shading devices on ventilation?

asked 2024-05-21 08:52:45 -0500

Emanuela's avatar

updated 2024-05-21 15:39:27 -0500

Hi! Firstly I would like to thank this forum for being a great help on my journey to learn E+.

I've been searching on this but i could not find a definitive answer. I'm testing out adaptations to promote thermal comfort, including shading devices, but i'm not sure if E+ (vers. 2024.1.0) considers the impact of devices, such as blinds, on ventilation, since these devices often hinder airflow.

I get the impression that E+ does not consider any impact of shading devices on ventilation, but could not find one definitive answer. If it is true, how can I adapt my simulations so this impact is considered?

I modeled my building with the OpenStudio plugin on SketchUp, but doing most changes to the IDF file directly through EP-Launch.

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answered 2024-05-22 14:38:21 -0500

Restricted airflow through windows (natural ventilation, infiltration) due to insect screens, blinds or even overhead awnings can be taken into account when setting an opening's discharge coefficient (Cd). Tricky, as a window's discharge coefficient can vary based on a number of factors, such as window type, proximity of obstructions (like an awning), proximity of other openings, etc. I haven't looked into this for some years now, but a quick Google search offers a number of recent lab (or CFD) experiments towards determining Cd's for natural ventilation (e.g. here, here, here). Hope this is helpful.

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Asked: 2024-05-21 08:52:45 -0500

Seen: 203 times

Last updated: May 22