[BLDG-SIM] Question About Equest - Space Peak Load Calculations

[Mark Prince]

I have a question about how Equest calculates the space peak load calculation.

For all of my internal heat gains (people, lights, equipment) I have schedules.  When you create a schedule, it not only asks for utilization for Sunday through Saturday, but it also asks for a schedule for Design Cooling and schedule for Design Heating.  I assume that the Design Cooling Schedule/Design Heating Schedule is used by Equest to calculate the peak cooling and heating load for the space.

For instance, lets say I have a laboratory with 8 watts/square foot of equipment load.  From an energy standpoint, this equipment load really never gets higher than 50% throughout the year.  So I create my Sunday through Saturday schedules with a peak utilization of 0.5000.  However, there will be sometimes where 8 watts/square foot will be generated in the laboratory, and I need to size my zone supply airflow for this 8 watts/square foot.  Therefore, I create my design cooling schedule to require a peak utilization of 1.000.  However, when I run the simulation and go to the "LS-B Space Peak Load Component" report the peak cooling load is using the 50% diversified load.  Why is this happening?  Shouldn't Equest be using the Design Cooling schedule which has a peak utilization of 1.000 all the time?

Sincerely,


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