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Is it possible to define the runperiod for energyplus in hours, rather than in days, through python ?

asked 2018-06-11 16:01:05 -0500

niharkopal gravatar image

I want to write a script to run energyplus till a particular time ( say 1700 hours) on a particular date. Is it possible to do that ? If yes, how ?

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Can probably do it in eppy.

__AmirRoth__ gravatar image__AmirRoth__ ( 2018-06-11 17:18:58 -0500 )edit

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answered 2018-06-12 01:32:46 -0500

updated 2018-06-12 01:32:56 -0500

You won't be able to stop in the middle of day out of the box, but that's not a problem, you can always truncate your output during post-processing if you want.

You don't need Python or whatever, but you just need a way to calculate the run period as you want it. You can do that manually, with excel, with python, etc.

eg: You want to run from january 1st, mignight to hour 1700. Ceiling(1700/24) = 71. January 1st offset by 71 days gives you March 13.

RunPeriod, 
  1700 hrs,  !- Name
  1,  !- Begin Month
  1,  !- Begin Day of Month
  3,  !- End Month
  13,  !- End Day of Month
  [...]
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Thanks a lot Julien! Actually I wanted to run a real-time simulation in which I get output every hour and based on that hour, I take a decision for the next hour. I might even have to go back by 1 hour, change schedules and run again. How will you suggest me to do that ?

niharkopal gravatar imageniharkopal ( 2018-06-12 01:38:49 -0500 )edit

@Julien Marrec couldn't you just apply a schedule to Output:Variable for specific days/hours you want to store data in the SQL file.

@niharkopal can you update you question with additional details about the specific interaction you want. It may be possible directly in EnergyPlus, or through EMS.

David Goldwasser gravatar imageDavid Goldwasser ( 2018-06-12 02:35:01 -0500 )edit

Yeah sure you can put a Schedule on the Output:Variable if you don't want it to be in the SQL file, but having 23 hours of extra data shouldn't be a huge deal.

@niharkopal: if want you want to do is simple, EMS might work. Otherwise you'd have to do cosimulation using the BCVTB for eg, but that's even more advanced.

Julien Marrec gravatar imageJulien Marrec ( 2018-06-12 06:35:10 -0500 )edit

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Asked: 2018-06-11 16:01:05 -0500

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Last updated: Jun 12