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What is the minimum time step of the weather data file to have the minimum error?

asked 2018-03-12 23:11:23 -0500

Teepu gravatar image

updated 2018-03-16 14:15:27 -0500

I saw an available weather data file that is for sale which is in EPW format already but its time step is hourly. Is this sufficient enough not to cause huge difference? We are going to simulate a building model for 1 year.

I am willing to read papers regarding this matter if you can find any.

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answered 2018-03-13 01:23:32 -0500

Avi gravatar image

updated 2018-03-13 04:45:36 -0500

To my best knowledge one hour resolution is the usual. You might want to read in the Auxiliary Programs Manual about the weather converter

When you use that site to find epw file you will end up with a file containing 8768 lines of them 8 are header lines and the rest is weather data. That is 365*24=8760 data points.

I believe you are good to go with hourly data.

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Yes. I have check auxiliary programs, if 1 hour resolution is not valid then we will opt using the weather converter from raw data. Resolution of white box technologies' weather data is around 600 recs/month which translates to 20 per day.

Teepu gravatar imageTeepu ( 2018-03-13 01:52:28 -0500 )edit

@Teepu Could you elaborate on what is your model and it's needs?

Also see my edit to my answer.

Avi gravatar imageAvi ( 2018-03-13 04:37:35 -0500 )edit

Right now, we still creating baseline model for our school building here. The model is hopefully for retrofits. We wanted to check if our OS model matches with the actual measurements.

Teepu gravatar imageTeepu ( 2018-03-13 04:43:42 -0500 )edit

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Asked: 2018-03-12 23:11:23 -0500

Seen: 16 times

Last updated: Mar 13