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RE: [EnergyPlus_Support] Single-sided ventilation modelling with EnergyPlus



I have been using ODS Studio’s virtual wind tunnel to generate wind pressure coefficients and air flow networks for E+.  They use Blender as a geometry tool and leverage OpenFoam for CFD.  I have had very good correlation of model simulation to actual building performance using this tool.  

 

Ned Lyon, P.E. (MA, WV)
Staff Consultant

SIMPSON GUMPERTZ & HEGER
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From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
Sent: Tuesday, February 28, 2017 3:42 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Single-sided ventilation modelling with EnergyPlus

 

 

I think the DesignBuilder online help references some sources regarding WPCs and discharge coefficients.

 

On 11 Oct 2016 3:40 p.m., "samin.marzban@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

 

 

Hi All,

I’m going to use EnergyPlus to model single-sided ventilation and I want to find if I change the facade of a building (opening, materials etc.), how ACH (Air Change Rate per Hour) changes.

My problem is that I don’t know the level of accuracy for prediction of single-sided natural ventilation with the “airflownetwork” objects in EnergyPlus.

The most important inputs for me are: wind pressure coefficients and discharge coefficient

I know I have two options for the WPCs: input or calculated.

For input: it is impossible for me to run CFD for each simulation and input the WPCs manually as I have hundreds of simulations with different facades. (I’m using Genetic Algorithm)

For calculated: I am wondering if the results that I get using this method are trustable as it uses an average WPC for the surface.

AND for the discharge coefficients, I have no idea!

Your help is much appreciated!

Cheers,

Samin

 

 



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Posted by: "Edward G. Lyon" <EGLyon@xxxxxxx>


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