First, I'd like to thank Jeremiah, Justin, and Dru for bothering to look into this problem, and those others who've given me their best wishes.
Although the inquisitive side of me wanted to know what I was doing wrong, I finally took up Jeremiah's suggestion and upgraded to Version 7.1, and the problem went away, i.e., I'm now getting cooling electricity for the exact same file, upgraded from Version 7.0 to Version 7.1. I've also gone back and ran the original Version 1.4 IDF straight from doe2ep, and there too the Cooling Electricity reported normally.
So, I'm chalking this up to some bug in the reporting routines in Version 7.0. I am quite surprised that nobody else has reported this major problem earlier; isn't the cooling electricity consumption one of the most important variables in a building energy simulation ?
Attached are the multiple IDFs and *.mtr from Versions 1.4, 7.0, and 7.1, in case anyone wants to do some forensics on this glitch.
As a sidelight, I also recorded the run times between the 3 versions. EnergyPlus seems to have sped up by a third from V1.4 to V7.0, but then slowed back down in V7.1. I thought there was an effort to make EnergyPlus run faster the past 3-4 years.
Version 1.4 132.8 seconds
Version 7.0 90.3 seconds
Version 7.1 145.5 seconds
Just as a contrast, DOE-2.2 took 66.0 seconds to do the entire set of 33 runs, or 2.0 seconds per run.
Joe
Joe Huang White Box Technologies, Inc. 346 Rheem Blvd., Suite 108D Moraga CA 94556 yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx www.whiteboxtechnologies.com (o) (925)388-0265 (c) (510)928-2683 "building energy simulations at your fingertips"
On 5/31/2012 10:33 PM, CleanTech Analytics wrote:
Joe,I made some small changes to your file, ran it and found cooling energy use, see attached and below.
Let me know if you have any questions and best regards-
Source Energy End Use Components Summary
Source Electricity [kWh] Source Natural Gas [kWh] Source Other Fuel [kWh] Source District Cooling [kWh] Source District Heating [kWh] Heating 32441.55 0.00 0.00 0.00 0.00 Cooling 804178.78 0.00 0.00 0.00 0.00 Interior Lighting 2491523.65 0.00 0.00 0.00 0.00 Exterior Lighting 0.00 0.00 0.00 0.00 0.00 Interior Equipment 1214184.16 0.00 0.00 0.00 0.00 Exterior Equipment 0.00 0.00 0.00 0.00 0.00 Fans 361727.88 0.00 0.00 0.00 0.00 Pumps 0.00 0.00 0.00 0.00 0.00 Heat Rejection 0.00 0.00 0.00 0.00 0.00 Humidification 0.00 0.00 0.00 0.00 0.00 Heat Recovery 0.00 0.00 0.00 0.00 0.00 Water Systems 0.00 0.00 0.00 0.00 0.00 Refrigeration 0.00 0.00 0.00 0.00 0.00 Generators 0.00 0.00 0.00 0.00 0.00 Total Source Energy End Use Components 4904056.01 0.00 0.00 0.00 0.00
Jeremiah D. CrossettCleanTech Analytics503-688-8951This document may contain valuable information proprietary to CleanTech Analytics which is private and confidential. It may not be shared, copied, stored or transmitted in any form without the prior written consent of CleanTech Analytics
On Wed, May 30, 2012 at 10:24 PM, Joe Huang <YJHuang@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
I made a mistake in my last posting. I had attached the DOE-2 packed weather file instead
of the EPW weather file. However, the good news
is that file is quite small. This time, I'm attaching the correct EPW weather file along
with the IDF and CSV output files, but zipped to reduce the size of the file.
Joe
Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx
www.whiteboxtechnologies.com
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"
On 5/30/2012 10:11 PM, Joe Huang wrote:
> I've created a set of idf files for a set of large retail models originally developed in
> DOE-2.2. The outputs show plenty ofcooling going on (Cooling Rate) , but no cooling
> electricity use. I suspect the problem is a mismatch in the output variables, but I
> can't find the source of the problem. Any help would be appreciated. Attached are the
> IDF, weather file, and monthly CSV output files.
>
> Joe
>
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