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Is there a way to associate constant design day values with an EnergyPlus Schedule:File?

asked 2015-04-03 15:54:30 -0500

Elaine Hale gravatar image

updated 2015-07-10 09:06:57 -0500

I am generating random-signal schedules, which seems like a good fit for the Schedule:File object, except that I don't see a way to specify constant winter and summer design day values when using that object. Is there a workaround for this, or is it a feature to be implemented sometime soon?

P.S. I just remembered that I am going to switch over to hard-sizing, such that this is not an issue, but I am still submitting the question because it may be of general interest.

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That is a good question. I am unclear what values are used for design days when using Schedule:File. I assume it would use the data specified for the date that the design day uses but I am not sure. If so, that doesn't let you decouple your simulation schedules from design schedules.

macumber gravatar image macumber  ( 2015-04-04 12:55:28 -0500 )edit

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answered 2015-04-16 06:05:17 -0500

A different approach to generating random values during the simulation is to create a ENERGYMANAGEMENT:PROGRAM that overrides a schedule value and uses @SeedRandom and @RandomUniform to generate a repeatable sequence of random numbers. These functions are built in math functions. This approach does not require using any external file and allows a normal schedule specification including SummerDesignDay and WinterDesignDay values.

Here is an example on how to override a schedule using EMS, just use @RandomUniform as part of the computation..

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Created an issue to add this feature.

JasonGlazer gravatar image JasonGlazer  ( 2015-04-16 06:12:20 -0500 )edit

Thanks for documenting the workaround and adding the issue!

Elaine Hale gravatar image Elaine Hale  ( 2015-04-16 10:01:41 -0500 )edit

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Asked: 2015-04-03 15:54:30 -0500

Seen: 196 times

Last updated: Apr 16 '15