Door, Window Leakage setting

[김진호]

I want to set up wall leakage using contam and set the amount of window leakage.
I got curious while setting the amount of leaks in the door and window through the library provided by nist.
Do I have to set up all the leaks provided by DOOR and DOORFAME??
Also, the value that I need to enter in FLOWPATH is the area of the door and the circumference of the door, right?

[William Dols]

First know that leakage values are not necessarily representative of every building.

That said, yes, if a leakage element is provided on a per area basis (cm2/m2) then you enter the total area of the door/window on the Flow Path page.
If it is provided on a per length basis (cm2/m) then you enter the total length of the leak, i.e., the perimeter of the window frame or door.

Also, a link to the associated report (NISTIR 6585) is provided on the NIST Multizone Modeling website.

- Stuart

[김진호]

In my modeling, the ppm value for pollutants comes out unusually large.
Can you see what the problem is?

2024년 5월 20일 월요일 오후 11시 43분 56초 UTC+9에 William Dols님이 작성:

[Dols, William Stuart (Fed)]

Please start with a simple, single zone model.
Use that to understand the basics of mass balance employed by CONTAM and the relationship between contaminant concentration and ventilation rate.
See (https://www.researchgate.net/publication/285693561_The_relation_of_CO2_concentration_to_office_building_ventilation) for an introduction to this topic.

 

Refer to the Introduction to CONTAM tutorials for detailed example of a multizone, residential building model with “reasonable” inputs.

 

Also, refer to the CONTAM documentation for species/contaminant properties.
You are providing input values that are not necessary for trace contaminants, e.g., mean diameter and effective density for gases.
These properties are meant for those contaminants that should be considered as particles.
Decay rate is meant for those species that are to be considered radioactive.

 

You can access context-sensitive help from anywhere in ContamW by pressing the F1 key on the keyboard.

 

- Stuart

 

From: 김진호 <rlawls...@gmail.com>
Sent: Tuesday, May 21, 2024 5:03 AM
To: CONTAM <con...@list.nist.gov>
Cc: Dols, William Stuart (Fed) <willia...@nist.gov>; rlawls...@gmail.com <rlawls...@gmail.com>
Subject: Re: Door, Window Leakage setting

 

In my modeling, the ppm value for pollutants comes out unusually large.
Can you see what the problem is?

2024년 5월 20일 월요일 오후 11시 43분 56초 UTC+9에 William Dols님이 작성:

First know that leakage values are not necessarily representative of every building.

That said, yes, if a leakage element is provided on a per area basis (cm2/m2) then you enter the total area of the door/window on the Flow Path page.
If it is provided on a per length basis (cm2/m) then you enter the total length of the leak, i.e., the perimeter of the window frame or door.

Also, a link to the associated report (NISTIR 6585) is provided on the NIST Multizone Modeling website.

- Stuart

 

 

On Monday, May 20, 2024 at 7:44:42 AM UTC-4 rlawls...@gmail.com wrote: