[Bldg-sim] Occupancy

[Peter Simmonds]

This is a very important point that is often forgotten in simulation
modeling. The computer is a strange object and if you tell the computer
to put one occupant for every 100ft2, then is does just that and the
related ventilation air and cooling (or heating).

I usually request the architect provide me with the occupation
calculations for the elevators and cafeteria and also the Fire Marshall
rating for building occupancy. These numbers are typically around 70% of
the simulation program occupants. The occupancy density in the program
and therefore be adjusted to match this.

How this could be interpreted in 90.1 I will leave up to any following
discussions?

 

Peter Simmonds, Ph.D. 
Senior Associate
Head of the Advanced Technology Group
IBE Consulting Engineers
14130 Riverside Drive, Suite 201
Sherman Oaks, CA 91423 
p: (818) 377-8220 x246 m: (818) 219-1284 f: (818) 377-8230

www.ibece.com <http://www.ibece.com/> 
Ideas for the built environment

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From: Brian Tysoe [mailto:BTysoe at mcw.com] 
Sent: Wednesday, December 08, 2010 6:50 AM
To: 'bldg-sim at lists.onebuilding.org'
Subject: [Bldg-sim] Occupancy

 

Hello all,

 

I have a question about occupancy schedules for energy models.

 

Generally the owner will provide peak occupancy numbers on a
room-by-room basis; and a peak overall occupancy number for the entire
building. Inevitably the room-by-room numbers will add up to
significantly more than the overall building number.

 

Which numbers should be used for the energy model? Would you use the
room-by-room number and scale them down with the occupancy schedule
based on the overall occupancy?

 

Obviously, this has a significant impact on the results.

 

Thanks,

 

 

Brian Tysoe M.A.Sc., P.Eng., LEED AP 

Mechanical Engineer 

 

MCW Consultants Ltd. <http://www.mcw.com> 

600-156 Front Street West 
Toronto, ON M5J 2L6 
Phone 416-598-2920 
Fax 416-598-5394 

 

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