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Heating and Cooling SET Hours (Annual Thermal Resilience Summary)

asked 2 years ago

krkh-1702's avatar

updated 2 years ago

Hi,

I am using OpenStudio-HPXML CLI to run some simulations and want thermal resiliency outputs. I am looking at the 'eplustbl.htm' file generated after the simulation. I see results for Heat Index Hours and Humidex Hours but no values under the Heating SET Hours and Cooling SET Hours tables (attached example image).

  1. Is there any advice on where the issue is?
  2. For thermal resiliency, are there any other metrics I should considerimage description?

I am using v1.51: https://github.com/NREL/OpenStudio-HP...

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answered 2 years ago

updated 2 years ago

According to the E+ documentation for thermal resilience outputs:

The Heating SET Degree-Hours and Cooling SET Degree-Hours are reported only when the Pierce model are chosen for thermal comfort calculations. To activate the Pierce SET calculation in EnergyPlus, users need to define the People and chose Pierce as the thermal comfort method.

And here is the thermal comfort model input where you can specify Pierce. Be sure to read the description of the Pierce model since additional inputs are required.

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Thank you, this is very helpful! However, I am not sure how to add these inputs within the OpenStudio-HPXML that I am using for running the batch simulations. Any advice on that? What folder should I look into?

krkh-1702's avatar krkh-1702  ( 2 years ago )

To elaborate more on the question - where do I go in and add this measure? Is it in the in.xml file for the building energy model or is it in one of the measure.rb files? Or, do I need to interact with the generated in.idf file after running the simulation?

Thank you for the help!

krkh-1702's avatar krkh-1702  ( 2 years ago )

Since OpenStudio-HPXML does not expose any inputs for describing thermal comfort models, the typical way to handle this is: 1) write an OpenStudio measure, that you would apply to the OpenStudio model created by the HPXMLtoOpenStudio measure, that makes the changes you want to see, 2) create an OpenStudio workflow (OSW) file that incorporates your measure, to be run via the Advanced Run instructions.

shorowit's avatar shorowit  ( 2 years ago )

If someone already wrote an OpenStudio measure to do this, that would make the effort much lower. But I don't see any such measure on the Building Component Library.

shorowit's avatar shorowit  ( 2 years ago )

Thank you, yes, that is what I thought too. I will try to figure out how to add a measure. To confirm, this measure should go in the measure.rb file in the HPXMLtoOpenStudio folder, correct?

Also, for the Advanced Run, I have a python script that runs the osw file, since I am running batch simulations. So that should not be a problem I think?

Thank you

krkh-1702's avatar krkh-1702  ( 2 years ago )
2

What Scott is saying means the new measure would be separate from the HPXMLtoOpenStudio measure and have its own similar folder with its own measure.rb file. You would then add a reference to that new directory in the OSW so that your python script should work the same as before. I'm a little uncertain based on the SDK documentation whether you'll be able to add the fields you need in the OpenStudio model space, but it's worth trying. I'll connect with you over email and point you in the right direction.

Craig Simmons's avatar Craig Simmons  ( 2 years ago )

I think everything is available in OpenStudio. Note that the thermal comfort model itself is defined in the PeopleDefinition object, not the People object.

shorowit's avatar shorowit  ( 2 years ago )

Thank you both - This is super helpful. I will give it a shot and also look forward to hearing from you, Craig!

krkh-1702's avatar krkh-1702  ( 2 years ago )

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Asked: 2 years ago

Seen: 200 times

Last updated: Mar 14 '23