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Re: [EnergyPlus_Support] Inexplicable output data

To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Inexplicable output data
From: "Michael J. Witte" <mjwitte@xxxxxxxx>
Date: Mon, 7 Mar 2005 13:20:31 -0600
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Two issues are causing the big difference in results between version 1.1.1 and 
1.2.1.  

1)  Version 1.1.1 had a bug related to the use of zone multipliers which caused 
the zone loads to be reported as zero for zones with multipliers.

2)  The main heating coil is sizing to zero capacity, so the reheat coils are 
the only source for heating.

Both of these bugs have been fixed in version 1.2.0 or 1.2.1.  If you must 
continue to run with version 1.1.1, you will need to set all zone multipliers 
to 1 and explicitly describe each zone.  You may also need to put in a hard 
size for the main heating coil in order for it to function (you could probably 
put in a very large size and set the plf curve to be flat for the purpose of 
your study).

SET POINT MANAGER:WARMEST is being used to establish setpoints for both the 
heating coil and cooling coil.  The heating coil should use SET POINT 
MANAGER:COLDEST.

I would suggest that you turn only hourly reports and run some design days with 
both 1.1.1 and 1.2.1 and adjust the simulation until you get reasonable results 
with both versions (they will never be identical due to many enhancements and 
bug fixes).

Mike



On 7 Mar 2005, at 11:28, Ali_Ajmi wrote:

> 
> I ran version 1.1.1.020. The problem of not using the latest is that the lab I
> am working in doing my experiments has this version. I asked the technician to
> updated it with new version but he said that impossible now because of technical
> matter. I certainly need to run my experiments in large set of PC's because I am
> using genetic algorithm (probabilistic optimization technique) which require
> that such number of PC's. What do you think Mike? 
> 
> "Michael J. Witte" <mjwitte@xxxxxxxx> wrote: 
> My apologies for the delay in responding. When I run the uploaded file, the
> columns which were zero in the original request (OPTTest_fivZonDXVAV.xls) now
> show significant loads. What version of EnergyPlus are you running? I ran
> OPT512.10_fivZonDXVAV.idf with version 1.2.1.022.
> 
> Mike
> 
> 
> On 25 Feb 2005, at 9:54, Ali_Ajmi wrote:
> 
> > 
> > 
> > I would agree that there is a problem in the thermostat control or/and supply
> > air set point control (but i don't know how to fix it). The system used here
> > is DX cooling coil VAV with reheat (gas). Please have a look to the the IDF
> > file which is uploaded under name OPT512.10_fiveZoneDXVAV.
> > 
> > 
> > Regards
> > Ali
> > 
> > "Michael J. Witte" wrote:
> > 
> > It is hard to tell what may be happening without seeing the input file. Some
> > thoughts:
> > 
> > 1. The zone temperatures seem reasonable and there are large cooling loads for
> > all hours. Perhaps there is an error in the internal gains inputs (lights,
> > electric equipment, etc.)?
> > 
> > 2. Check thermostat controls and supply air set point controls.
> > 
> > 3. What type of system is this?
> > 
> > Mike
> > 
> > 
> > On 24 Feb 2005, at 14:54, Ali_Ajmi wrote:
> > 
> > > 
> > > Dear All,
> > > Could any explain why i have zero coulmn of North, South and Interior and
> > > also Main Heating Coil DX1 (all these coulmn are higliated in red). This
> > > file is uploaded under name OPTTest_fiveZoneDXVAV in the group files folder
> > > at this link (http://groups.yahoo.com/group/EnergyPlus_Support/files/).
> > > 
> > > Thanks
> > > Ali
> > > 
> > > 
> > > ---------------------------------
> > > ALL-NEW Yahoo! Messenger - all new features - even more fun! 
> > > 
> > > [Non-text portions of this message have been removed]
> > > 
> > > 
> > > 
> > > The primary EnergyPlus web site is found at:
> > > http://www.energyplus.gov
> > > 
> > > The group web site is:
> > > http://groups.yahoo.com/group/EnergyPlus_Support/
> > > 
> > > Attachments are not allowed -- please post any files to the appropriate
> > > folder in the Files area of the Support Web Site.
> > > 
> > > Yahoo! Groups Links
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 
> > 
> > 
> > 
> > ========================================================
> > Michael J. Witte, GARD Analytics, Inc.
> > EnergyPlus Testing and Support 
> > EnergyPlus-Support@xxxxxxxx
> > 
> > 
> > 
> > 
> > The primary EnergyPlus web site is found at:
> > http://www.energyplus.gov
> > 
> > The group web site is:
> > http://groups.yahoo.com/group/EnergyPlus_Support/
> > 
> > Attachments are not allowed -- please post any files to the appropriate folder
> > in the Files area of the Support Web Site.
> > 
> > Yahoo! Groups Links
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > ---------------------------------
> > ALL-NEW Yahoo! Messenger - all new features - even more fun! 
> > 
> > [Non-text portions of this message have been removed]
> > 
> > 
> > 
> > The primary EnergyPlus web site is found at:
> > http://www.energyplus.gov
> > 
> > The group web site is:
> > http://groups.yahoo.com/group/EnergyPlus_Support/
> > 
> > Attachments are not allowed -- please post any files to the appropriate folder
> > in the Files area of the Support Web Site.
> > 
> > Yahoo! Groups Links
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> > 
> > 
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> > 
> > 
> 
> 
> 
> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support 
> EnergyPlus-Support@xxxxxxxx
> 
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
> 
> Yahoo! Groups Links
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> 
> 
> 
> 
> 
> Send instant messages to your online friends http://uk.messenger.yahoo.com 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 
> 
> 
> 



========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx




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References:
- Re: [EnergyPlus_Support] Inexplicable output data
  - From: Michael J. Witte
- Re: [EnergyPlus_Support] Inexplicable output data
  - From: Ali_Ajmi

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