[BLDG-SIM] Internal Loads for Office Buildings

["Brian Fountain" <brian.fountain@xxxxxxxxxxxxxxxxxxx>]

I recall a study by the British Columbia Energy Management Task Force that monitored the current draw on outlet circuits in a couple of buildings in the mid-1990's.  As suggested below, it found plug loads to be in the order of 0.75 to 0.85W/ft² during the day.  The interesting part was the unoccupied plug loads of around 0.35W/ft². 

 

 

-----Original Message-----
From: postman@xxxxxxxx [mailto:postman@xxxxxxxx]On Behalf Of Tom Anderson
Sent: Wednesday, December 05, 2001 5:47 AM
To: BLDG-SIM@xxxxxxxx
Cc: BLDG-SIM@xxxxxxxx
Subject: [BLDG-SIM] Internal Loads for Office Buildings

If by high tech buildings you are referring to a modern office buildings, then loads from desktop PC's, monitors, printers, copiers, etc. typically will be about .5 watts per square foot, but may range from .5 to 1.0 watts per foot.  Note the actual power use by such equipment is well below the nameplate power data.

Refer to published ASHRAE papers, starting in 1994, authored by Chris Wilkins, who reported on extensive monitoring of such loads in real world office buildings.

Lighting loads, refer to 90.1-1999 for maximum power densities permissible for office occupancies.  But lighting designers who apply efficient fixtures for interior lighting design can easily achieve excellent illumination levels using well below 1.0 watts per foot.

Thomas E. Anderson

President

Cx Associates, Ltd.

Building Commissioning Specialists

http://www.cx-assoc.com

933 Road 101

Jeffersonville, Vermont 05464 USA

hvac@xxxxxxxxxxxx

Tel: 802-644-5616 Fax: 802-644-6797

Samuel Hassid wrote:

  what is the accepted value for internal loads in a high tech building ?

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