First time here? Check out the Help page!

Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
2

why infiltration in summer and winter are different?

asked 3 years ago

Moheete's avatar

updated 3 years ago

I found some .idf files that are of infiltration schedules. I found the infiltration schedule some odd! beacouse it is different throught the year. I want to know why they are different? thanks

Preview: (hide)

1 Answer

Sort by » oldest newest most voted
4

answered 3 years ago

Jim Dirkes's avatar

Generally, the winter winds are stronger, thus making infiltration higher. Infiltration, in my opinion, is difficult to model accurately. I like the treatment described by Lisa Ng, Steven Emmerich and Andrew Persily in NIST Technical Note 1829. (http://dx.doi.org/10.6028/NIST.TN.1829)

It provides coefficients which vary infiltration by wind speed, though you still need to assign a base rate for the infiltration.

Preview: (hide)
link

Comments

2

The zone air (Tzone) to outdoor air (Todb) temperature difference is also greater in the winter than the summer. https://bigladdersoftware.com/epx/doc...

MatthewSteen's avatar MatthewSteen  ( 3 years ago )

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Training Workshops

Careers

Question Tools

1 follower

Stats

Asked: 3 years ago

Seen: 522 times

Last updated: May 11 '21