Even I realized the same thing. the total energy use in Energy plus was almost 50% less than equest.
If this is the case, who would you know that you model is working fine?
On Wed, Apr 27, 2011 at 6:06 PM, Joe Huang
<yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
I was involved in a two year project 2005-2007 to convert the Calif. Energy Commission's Title-24 certification suite of building tests from DOE-2..1E to EnergyPlus. There are some areas where it's difficult to get comparable inputs due to differences or limitations in the models. The differences between the two programs varied a lot depending on the building, weather, and HVAC system. For the CEC certification suite of 160 runs, cooling results were more consistent, within 10% in most cases, with EnergyPlus almost always on the high side; for heating, the differences were much greater, sometimes with EnergyPlus being 40-60% lower than DOE-2.1E. I have a 120-page report on this comparison, but haven't bothered to put it on the Web.
Joe
Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx
www.whiteboxtechnologies.com
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"building energy simulations at your fingertips"
deepika khowal wrote:
HI All
I am trying to create same model in equest and energy plus to see whether i see same results and just to validate my simulation files.
has anyone done this before?
I would like to know what is the % difference in both software outputs?
Thanks
Deepika