Dear All,
Lately I started noticing in simulations that demand for some end-uses
for some months are reported wrong by eQuest. For example, please see
the following:
How would you explain that in March and December many end-uses are shown
with no or very little demand (the lighting and misc. equipment
schedules are the same of course throughout the year).
Looking at PS-F reports, same situation exists with PEAK ENDUSE, while
MAX KW seems to be OK.
How can I be sure that the simulation is run correctly? Also, what is
the difference between PEAK ENDUSE and MAX KW?
Thanks in advance,
?mer Moltay, LEED AP BD+C, ASHRAE BEMP, ASHRAE CPMP
Mimta EcoYapi, LEED Proven Provider
Hekimsuyu Cad. 559. Sk.
No:39 34255 Kucukkoy Istanbul Turkey
Tel: 90-212-617-2296
Fax: 90-212-617-2297
Mobile: 90-533-957-1394
www.eco-yapi.com
www.buildingenergymodels.com
The time of day that the peak is occurring is shifted from the other months so that the end-use during that hour is a different proportion, does it make sense that the lights are off at the time of the peak in March and December?
January and February had building peaks in hour 9 while March peaked in hour 1.
I think ?Peak End-use? is the contribution at the coincident peak, while the max kW is the max of that end-use at any time in the month. In March for instance 9.4 kW is the misc equipment load at the time of the peak, even though the max kW for misc equipment is 33.6 kW just like the other months which makes sense if it is constant through the day and then scaled back in some way when the load for March shifted to an unoccupied time.
Anyway ? to verify these you can run a report to track the end-use variables hourly and graph them all continuously instead of using the snapshot of the peak times.
David
David S. Eldridge, Jr., P.E., BEMP, BEAP, HBDP, GGA
Associate
Direct: (847) 316-9224 | Mobile: (773) 490-5038
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