[Equest-users] Question on eQuest Modeling DX Cooling, with Bug?

[Guoguang Le]

Carol, I attched files for your review. If it is true, then eQuest has some bugs.
Thanks for your time.
Best regards,
 
James
--- On Mon, 9/13/10, Guoguang Le <jamesle_tx at yahoo.com> wrote:


From: Guoguang Le <jamesle_tx at yahoo.com>
Subject: Re: [Equest-users] Question on eQuest Modeling DX Cooling, with Bug?
To: "Carol Gardner" <cmg750 at gmail.com>
Cc: equest-users at lists.onebuilding.org
Date: Monday, September 13, 2010, 7:35 PM







Hi Carol,
 
I have attached two inp files, one for Air cooled condenser model with EER 9.9 and another one for Evap Cooled condenser with EER 11.
 
I created these files with eQuest Wizard mode. If you move forward to detailed mode, you will find "Cooling Electric Input Ratio" is 0.2911 btu/btu in EER 9.9 model and 0.2580 btu/btu in EER 11 model. 
 
If you run simulation, the result for EER 9.9 air cooled model is $242,752 and for evap Cooled model is $243,127. (I did not change the data on "Cooling Electric Input Ratio".)
 
If I change the data in the field of "Cooling Electric Input Ratio" as 0.3444 for EER 9.9 air cooled model and 0.3100 for EER 11 evap cooled model. The result is $245,342 for EER 11 Evap cooled model and $244,726 for EER 9.9 Air Cooled model.
 
The conclusion is EER 11 evap cooled model is worse than EER 9.9 air cooled model.
 
Can you help figure it out?

Best regards,
 
James
 
I believe that there are many Guru in the web. Thanks for your time!
 
 
 

--- On Sun, 9/12/10, Carol Gardner <cmg750 at gmail.com> wrote:


From: Carol Gardner <cmg750 at gmail.com>
Subject: Re: [Equest-users] Question on eQuest Modeling DX Cooling, with Bug?
To: "Guoguang Le" <jamesle_tx at yahoo.com>
Cc: equest-users at lists.onebuilding.org
Date: Sunday, September 12, 2010, 9:11 PM


Not likely. Send a copy of your .inp and .pd2 files for help.

Carol


On Sun, Sep 12, 2010 at 6:10 PM, Guoguang Le <jamesle_tx at yahoo.com> wrote:







To all,
I have two energy models on DX cooling for a same building, one is with air cooled and another with evaporation cooling. The EER is 9.9 for air cooled condenser and  11 for evaporation cooled condenser. The final result I got is that it is the low cost to run air cooled condenser DX with EER 9.9 than evaporation cooled condenser DX with EER 11. I am wondering whether eQuest has bug or not. Anyone could figure it out?
Best regards,
James
 
 

--- On Sun, 9/12/10, equest-users-request at lists.onebuilding.org <equest-users-request at lists.onebuilding.org> wrote:


From: equest-users-request at lists.onebuilding.org <equest-users-request at lists.onebuilding.org>
Subject: Equest-users Digest, Vol 30, Issue 19
To: equest-users at lists.onebuilding.org
Date: Sunday, September 12, 2010, 2:03 PM


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-- 
Carol Gardner PE


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