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Re: [EnergyPlus_Support] Processing multiple years in epw



Any weather file can start in mid-year.  It's the spanning more than 365/366 days that needs the custom range data.

At 12:39 PM 11/6/2014, Jeremiah Crossett jcrossett@xxxxxxxxxxxxxxx [EnergyPlus_Support wrote:


It is a single year that starts in one year and ends in the next. DATA PERIODS,1,1,Period 1,Sunday,9/1/2013,8/31/2014
From what I understand about the object is that it could work for either mid year start dates (similar to commonly accessible utility bills) or could span more than a single year with very similar methods. Â



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Jeremiah D. Crossett  | Senior Analyst  | LEED Green AssociateÂ
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7411 SW Capitol Highway | Portland, OR 97219Â
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 | Mobile 503-688-8951
 www.phasechange.comÂ
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On Thu, Nov 6, 2014 at 11:33 AM, Linda Lawrie linda@xxxxxxxxxxxxxx [EnergyPlus_Support] < EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
 

Jeremiah,

This is only a single year weather file.  Weather converter can generate one of those -- including not starting on Jan 1.  It won't/can't put the actual dates in.

At 11:36 AM 11/6/2014, Jeremiah Crossett jcrossett@xxxxxxxxxxxxxxx [EnergyPlus_Support wrote:


The attached files show how to properly setup the idf and epw. The weather file was generated with a program developed by a user some time ago and then the epw file was modified a bit by me. The weather converter was not used, however it would be interisting to see if it works as expected with the changes in start and end dates.�  Hopefully it is useful for others to get an idea of what is needed for this object and weather file.�


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Jeremiah D. CrossettÃ? Ã? | SeniorÃ? AnalystÃ? Ã? |Ã? LEED Green AssociateÃ?
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7411 SW Capitol Highway | Portland, OR 97219Ã?
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On Thu, Nov 6, 2014 at 10:28 AM, Dru Crawley dbcrawley@xxxxxxxxx [EnergyPlus_Support] < EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
� 
Ned,
Ã?
EnergyPlus onlys reads EPWs.�  The custom CSV EPW is a convenience for users to understand what data is required in each column.�  You'd need to use the WeatherConverter to conver tthe custom CSV EPW back to EPW.
Ã?
Dru
On Thu, Nov 6, 2014 at 1:07 PM, Linda Lawrie linda@xxxxxxxxxxxxxx [EnergyPlus_Support] < EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
� 
I cannot parse what you are saying, Ned.�  I read it over twice.
There are two ways that EnergyPlus can run multiple years -- with the RunPeriod object and the repeat field.
Also we implemented something about actual year -- I can't remember if that applies to the RunPeriod, the CustomRange or both.
The CustomRange expects weather files that are hand crafted to have actual dates in the date fields and in the header (so it knows if the selection is on the weather file or not).�  And they are merged together in one large file.
I can likewise send you the files I just sent Jim that implement same.
Linda
At 09:02 AM 11/6/2014, 'Edward G. Lyon' eglyon@xxxxxxx [EnergyPlus_Support] wrote:


I think what is not very clear in the documentation is if the custom weather file is the .csv file format (created from the weather generator opening a .epw or generating form some other source) or the .epw format with more than a year of data actual date order.�  I suspect the latter?
Ã?
Ned Lyon, P.E. (MA, WV)
Staff Consultant
SIMPSON GUMPERTZ & HEGER
781.907.9000 main
781.907.9350 direct� 
617.285.2162 mobile� 
781.907.9009 fax
www.sgh.com
� 
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [ mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx]
Sent: Thursday, November 06, 2014 10:49 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Processing multiple years in epw
Ã?
� 
Jim is right, of course - as usual.
I can send you both a file that does a custom range and a weather file.
You will need to hand create the weather file (appending the 2nd year onto the first or similar).
� I would send it to you privately.� 
At 04:44 AM 11/6/2014, Jim Dirkes jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx [EnergyPlus_Support] wrote:

Marko,
The purpose of the CustomRange object is for >365 day weather years, as I understand it.�?�  I think this object bbecame available about 2 years ago.�?�  I was one of those who requessted it so that it would be more practical to model existing buildings where the electricity and gas billing periods extended for longer than one calendar year. As it happens, I have not tested it yet, but expect to do so soon.
Ã??
On Thu, Nov 6, 2014 at 5:38 AM, marko.ignjatovic1980@xxxxxxxxx [EnergyPlus_Support] < EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
�?� 
Hi all,

I have problem running simulation for two consecutive years, ie. processing raw weather data in epw. I have raw weather data starting from October 15th 2013 until October 31st 2014. Can I create extended epw containing this data period (creating epw for 8760 values is no problem)? I read I/O documentation and found that RunPeriod:CustomRange can do the trick but I am not sure. Any comment is more than welcome

MarkoÃ??



--

Ã??

James V Dirkes II, PE, BEMP, LEED AP
The Building Performance Team
1631 Acacia Drive, Grand Rapids, MI 49504
(M) 616 450 8653

The more one does what is good, the freer one becomes. There is no true freedom except in the service of what is good and just.



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Content-Disposition: inline; filename="BPT Logo 35pct.png"
X-Attachment-Id: f_i12e40cc0






Content-Type: application/octet-stream;
         name="NEW-CLT_9-1-2013_8-31-2014.EPW"
Content-Disposition: attachment; filename="NEW-CLT_9-1-2013_8-31-2014.EPW"
X-Attachment-Id: f_i26gbzhw0

Content-Type: application/octet-stream; name="NoPCM_BuildingE.idf"
Content-Disposition: attachment; filename="NoPCM_BuildingE.idf"
X-Attachment-Id: f_i26gc1591






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Posted by: Linda Lawrie <linda@xxxxxxxxxxxxxx>


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