[Bldg-sim] eQuest/DOE2 instantaneous loads

[Joe Huang]

James,

There are two sets of loads in DOE-2, in both the LOADS and SYSTEMS 
routines. Make sure you're looking at the SYSTEMS loads, not the LOADS
loads.

Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd. Suite 108D
Moraga CA 94556
YJHuang at whiteboxtechnologies.com

James Lo wrote:
> Hi there,
> 
> Just joined the group and I am glad there are people out there as 
> curious about building simulations.
> 
> That said, I have a questions regarding getting instantaneous loads from 
> DOE2 using eQuest. Here in the University of Texas we are currently 
> trying to do a parametric study on effects of varying temperature 
> set-point and occupancy. Pretty much we are changing the occupancy 
> schedules and set points in the HVAC setup and see what happens (for a 
> specific test building).
> 
> While we are getting decent HVAC electricity consumption outputs (which 
> somewhat fit our expectations), we were not able to get the simulated 
> instantaneous loads for a zone... Say if I have a cooling zone with the 
> set point changed from 75F to 80F, the increased indoor temperature 
> should decrease the conduction load and ultimately reduce the energy 
> used for cooling.
> 
> We are seeing the energy reduction, but all the "loads" stay the same no 
> matter which parameters we are looking at in the report.
> 
> I believe I read it somewhere that all the "loads" in DOE2 are design 
> loads for a specific building material/weather then they modified for 
> the load for set points and occupancy, that's why when there is no 
> material changes, the loads stay the same, is that true?
> 
> 
> The bottom line is we will need to somehow figure out how much the 
> external load reduction is when we adjust set point and occupancy.
> 
> Thanks for the help!
> 
> - James
> 
> 
> L. James Lo, Doctoral Candidate
> Center for Energy & Environmental Resources
> University of Texas at Austin
> 10100 Burnet Rd. Bldg. 133 Rm 1.302C
> Austin, TX 78758
> Phone: (512) 699-9480
> ljameslo at gmail.com
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