Hourly load profile data from OpenStudio

Hi everyone,

I am using OpenStudio to estimate the typical cooling loads in an office building. I need the hourly loads to see the trends in base and peak loads in the building. However, OpenStudio Results gives me only the monthly average loads. June, for example was the hottest month in the year. I am specfically looking for the load profile trends for the month of June.

Do you know how I can generate plots or CSV files of hourly load profiles? Any help in this regard is appreciated. Thank you!

asked 2023-08-25 03:02:42 -0500

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Aaron Boranian

updated 2023-08-25 15:40:08 -0500

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Refer to the "Requesting Output Variables" section of the Getting Started documentation for the OpenStudio Application.

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shorowit

answered 2023-08-28 09:47:27 -0500

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Hello - I reviewed the linked documentation and I don't see way of updating the OpenStudio Results measure to create hourly chart and table for hourly annual cooling and heating loads. It shows how to change reporting interval for a variable, but not update the measure. The heating and cooling results I am looking for are total building hourly loads: sum of zone and system level loads. The measure must be summing up multiple variables to get the monthly data. I did not find which variables it is summing in the documentation to do this separately through variable requests.

vbraciszewski (2023-09-23 17:41:02 -0500) edit

@vbraciszewski you would request output variables in a specific tab of the OpenStudio Application -- not in the OpenStudio Results measure.

Aaron Boranian (2024-08-09 11:55:48 -0500) edit

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Part of the OpenStudio and EnergyPlus result files is the Zone Sensible Cooling and Heating Sensible Sizing section which shows calculated design and user loads per thermal zone. To get hourly values (or any time step specified in your simulation settings), check the epluszsz .csv file.

The file location is MODEL NAME > run > epluzsz

Olamide

answered 2024-08-09 09:57:18 -0500, updated 2024-08-09 10:02:09 -0500

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It sounds like the CreateCSVOutput OpenStudio measure might be what you're looking for. That'll give you a CSV file for output variables and meters in your model. In addition to adding output variables to the model as others have pointed out, you could add the Add Hourly Meters measure as well which will add several meters that will aggregate different heating and cooling categories for you.