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Zone Component Load Summary Breakdown

asked 2021-12-01 11:28:53 -0600

updated 2021-12-01 12:19:52 -0600

If a thermal zone contains 5 rooms, is it possible to get the load summary report for all of the rooms individually? The zone component load summary table does have data for each thermal zone but I wish to know if there is any way we can break it down according to each room within that particular thermal zone. Thank you in advance.

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answered 2021-12-01 11:46:02 -0600

updated 2021-12-01 12:09:38 -0600

Not as of right now. OpenStudio translates the Space objects inside a ThermalZone as a single EnergyPlus Zone. You need to put each Space into a separate ThermalZone.

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@LuisLara Thank you. This is helpful.

MagicAxe gravatar image MagicAxe  ( 2021-12-01 12:58:33 -0600 )edit

answered 2021-12-02 14:40:14 -0600

updated 2021-12-03 08:05:23 -0600

If you just want to get internal loads (plug, lighting) you could use annual equivalent hours method for ruleset schedule along with the installed level for each internal load instance to calculate this. This would just use model input data so it could be done on the fly in the model without needed a simulation; it does not however account for reduction in lighting from daylight sensors, just what is scheduled.

Another approach would be to output timeseries data for individual equipment objects and in reporting measure aggregate them by space. The existing Envelope and Internal gain measure gets hourly surface heat gain and loss, that could also be aggregated by space.

It is a relatively unknown measure but has a lot of potential (It would be great if it was extended to represent impact of ventilation and identify beneficial vs. harmful gain/losses). Main charts Look like OpenStudio Results but pie chart is broken down by building components instead of end uses (although some items are light lights are both).

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The envelope components are aggregated from hourly data on each surface. I'm aggregating them by surface type bu could be space. Could even add extra table to this report by space.

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David, in the first section of your answer, are you saying that there is a method for ScheduleRuleset that returns the EFLH? Or did I mis-interpreted it?

Luis Lara gravatar image Luis Lara  ( 2022-01-01 03:43:56 -0600 )edit

@Luis Lara, yes, but it you do have to require standards gem in the measure, since this code is in standards and not core OpenStudio. The gem is already accessible in the OpenStudio’s Ruby interpreter along with the extension gem as well.

Here is it in use in a measure (line 122, not 120)

David Goldwasser gravatar image David Goldwasser  ( 2022-01-01 11:16:32 -0600 )edit

This is very helpful! Thanks!

Luis Lara gravatar image Luis Lara  ( 2022-01-01 14:13:05 -0600 )edit

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Asked: 2021-12-01 11:28:53 -0600

Seen: 76 times

Last updated: Dec 13 '21