Stack effect question

3 posts / 0 new
Last post

This might be a basic question.

Does the internal temperature of a stack affect the neutral pressure height? Would adding heat into a stack cause the neutral pressure point to rise? Instinctively I think it does, but I cannot find the equation for this.

Appreciate any feedback

Thanks

Vikram Sami, AIA, BEMP, LEED AP BD+C
Director of Building Performance

OLSON KUNDIG
159 South Jackson Street, Suite 600, Seattle, WA 98104 USA
T +1 206-340-2545 olsonkundig.com
Twitter / Instagram @olsonkundig
If you have received this confidential message in error, please immediately notify the sender by reply email and delete all copies from your system.

Bldg simulation's picture
Offline
Joined: 2016-04-13
Reputation: 400

An HTML attachment was scrubbed...
URL:

Bldg simulation's picture
Offline
Joined: 2016-04-13
Reputation: 400

The natural pressure level (NPL) is roughly mid-height of the building.
What plays a role in NPL deviating from mid-height are mainly the openings in the envelope. Naturally, with more openings at the bottom of the building (entrance, backdoors, garage ramps, loading decks, etc.) the NPL drops down (half-a-floor, or more).

Thanks.

Bass

Bass Abushakra, PhD

[datadigm-LATEST-logo.JPG]

President and Principal Engineer
Datadigm, LLC
Technology Innovation Center
10437 Innovation Drive, Suite 141
Wauwatosa, WI 53226-4815
Email: bass at datadigm.us
Tel: 414-517-4183

[cid:image002.jpg at 01D25083.F2969B60]

Adjunct Faculty
Department of Mechanical Engineering
Marquette University
Haggerty Hall, Room H-242
1515 W. Wisconsin Ave.
Milwaukee, WI 53233
Email: bass.abushakra at marquette.edu
Tel: 414-288-5893

Bldg simulation's picture
Offline
Joined: 2016-04-13
Reputation: 400