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Modify Example1A to output results for 1 year not two days

asked 2022-06-23 19:48:39 -0600

petyr's avatar

updated 2022-07-01 13:31:29 -0600

I'm using openstudio to modify energyplus files. Complete noob at BEM. Don't want to do anything but get data output to plot indoor and outdoor dry bulb temperatures for each hour of 1 fictitious year using the Ashrae clear sky model. My only purpose is to understand how the code works. Thanks for abiding the simplest of questions.

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answered 2022-06-30 09:46:13 -0600

It sounds like you are only running the two summer/winter Design Days, which are used for purposes of HVAC autosizing. You need to tell EnergyPlus that you want to run the full annual run period.

In the OpenStudio application, you can run the annual simulation by going to the Simulation Settings tab, make sure the Run Period is Jan 1 - Dec 31, and turn on Run Simulation for Weather File Run Periods.

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answered 2022-07-01 14:15:14 -0600

petyr's avatar

Thanks for pointing out the buttons I needed to focus on - that was helpful. Apparently, what I wasn't comprehending, which Shorowit's response helped me grok, was that a weather file is required from which the analysis times are extracted. Also, for my purpose, the weather file has to have data appropriate to a Clear Sky Model. Attached is an EPW file stripped of all extraneous information and containing ONLY the data used by Energy Plus. Unnecessary values are input as "missing" using the appropriate 999... values. The clear sky model was calculated in a python program using pvlib ( from Sandia Natl. Lab. This EPW file is specific to the latitude, longitude and time-zone of Pasco, WA and presumably uses atmospheric turbidity values specific to this location. Note also that temperature and humidity values are set to constant values for the entire year. While these values are totally unrealistic for any practical purpose, my objective is to test Energy+ with the simplest possible boundary conditions.

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Asked: 2022-06-23 19:48:39 -0600

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Last updated: Jul 01 '22