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RE: [EnergyPlus_Support] Re: Difference between RunPeriod and SizingPeriod:weatherfiledata





You may also turn on the report on:
 
Zone,Average,DayType Index []
Zone,Average,Schedule Value []
 
to see whether the same date uses the same day type and schedules.
 
The day can be set in the DesignDay object.  I am not sure whether the sizing run period would start with day type 1 and so may be different from the weather file run.   The weather file day of the week is set at the line after the Comment2, the Data Period line.
 
 Dr. Li   
 


To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: linda@xxxxxxxxxxxxxx
Date: Tue, 13 Oct 2009 06:59:46 -0600
Subject: Re: [EnergyPlus_Support] Re: Difference between RunPeriod and SizingPeriod:weatherfiledata

 
There was a bug in V3.1, try downloading V4.0 and see if you still have problems.

Note, too, however, that daylighting is not run for Sizing periods -- with your change in electric power, if you have daylighting, this might be the answer.

At 09:41 PM 10/12/2009, hjtju2002 wrote:
Dear all,

I define in my input file the RunPeriod is the whole year. And I also set up the SizingPeriod:weatherFileDays is only two month (Jan 1st to March 1st). Both of them use the same weath file.

But after simulation, I found that the results of the same day calculated using RunPeriod and SizingPeriod are different. For example, on Feb 1st, the electric power is 75 for RunPeriod and 227 for SizingPeriod.
 
Could anyone explain why they are different?




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