Run period simulation with modified weather file

asked 2016-04-30 17:10:27 -0500

Yannis's avatar

updated 2020-01-20 13:34:38 -0500

I modified a weather file of year 2005 using elements software tool. I set the value 2014 in the Reference Year field and some of the time-series data. image description

In openstudio I set the value 2014 in the Callendar Year field in the schedule tab/Year Settings .

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I created a new run period profile from 10th to 15th of August. I checked if the input values are correct to the corresponding days (in result viewer) and I see that the values are not correspond to the respective days. I opened the in.idf file (path: ....\run\2-ModelToIdf-0) and I see that the value Day of Week for Start Day is Wednesday which is not the right value for year 2014 as the 10th of August is Sunday. I think for some reason openstudio uses 2005 as the reference year

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Why is this happening?

EDIT ----------------------

If I change the epw file openstudio change the year settings image description

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Can you double check that calendar year setting in the app sticks after setting the epw file? If OpenStudio detects any gaps in the dates in the weather file it will default back to TMY and reset the calendar year.

If the calendar year is set correctly in the app then it may be a bug related to your start date. Can you try starting a simulation on 1/1 and see if the dates are correct?

macumber's avatar macumber  ( 2016-05-02 00:34:40 -0500 )edit

As you can see I edited my question. The calendar year settings changed after setting the epw file. If I set run period from 1/1 everything is ok. My second thought is that the openstudio sticks on Wednesday because is the first day of the year 2014 and for some reason it keeps this value for Day of Week for Start Day for every run period. I think one simple solution is to set annual run period and get the results from the period that I 'm interested to.

Yannis's avatar Yannis  ( 2016-05-02 04:46:44 -0500 )edit

After some tests I noticed that if I set the run period a few days before e.g. from 6th to 15th of August the input values are correct to the corresponding days (10th to 15th of August) ....!

Yannis's avatar Yannis  ( 2016-05-02 04:55:13 -0500 )edit

@Yannis, if you set the correct year after setting the EPW file do you get the correct days in your August run period?

macumber's avatar macumber  ( 2016-05-02 10:46:13 -0500 )edit

@macumber, No I don 't get the correct days. I forgot to mention that original weather file has been purchased from Here is my model and the original weather file before modified :

Yannis's avatar Yannis  ( 2016-05-02 12:09:00 -0500 )edit