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Meter equipment by space type in OpenStudio

asked 2016-10-20 13:33:42 -0500

amyegerter gravatar image

updated 2016-10-20 15:03:00 -0500

Hi,

I would like to break out interior equipment usage by space type so that I can accurately report kitchen/data center/elevator/escalator energy use as separate from general plug loads. I know that I can add the "Electric Equipment Electric Energy" output variable in OpenStudio, but this outputs the equipment loads for each individual zone. I would like to find a way to combine equipment loads by space type so that I can run many models and reduce post-processing time. Is there a solution that someone else has used for this? If not, perhaps there is a general interior load that can be added, similar to eQUEST?

Thanks, Amy Egerter

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@amyegerter, this is a good question. hopefully some others will jump in with ideas, I can try as well. One question I do have is if your elevator and escalator loads are assigned to a space type, or assigned directly to a space. As a note the SpaceType Summary section of the standard OpenStudio report does list the installed internal load capacities by space type, but that doesn't give you consumption. While we could get the annual equivilant hours from the schedules to get conusmption, I think using the EnergyPlus SQL file is better, in particular for lighting.

David Goldwasser gravatar image David Goldwasser  ( 2016-10-25 09:37:33 -0500 )edit

If you search for 'openstudio' and 'output-meter' tags there are a few questions. Some of them mention EnergyPlus Meter:Custom object that is not yet in OpenStudio API.

Currently that could be added as an OpenStudio measure.

David Goldwasser gravatar image David Goldwasser  ( 2016-10-25 09:46:00 -0500 )edit

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answered 2016-10-25 10:01:33 -0500

updated 2016-10-25 10:05:07 -0500

The last input to the ElectricEquipment object allows the energy use to be included in a unique sub-category name at your choosing (e.g., OfficeElecEquip, KitchenElecEquip, DataCenterElecEquip, etc.). The Lights object also used this same input (4th input from end of object).

ElectricEquipment,
  A1 , \field Name
  A2 , \field Zone or ZoneList Name
  A3 , \field Schedule Name
  A4 , \field Design Level Calculation Method
  N1 , \field Design Level
  N2 , \field Watts per Zone Floor Area
  N3 , \field Watts per Person
  N4 , \field Fraction Latent
  N5 , \field Fraction Radiant
  N6 , \field Fraction Lost
  A5 ; \field End-Use Subcategory
   \note Any text may be used here to categorize the end-uses in the ABUPS End Uses by Subcategory table.
   \note The following special tags will also place the end-use in specific rows in the LEED Summary table
   \note EAp2-4/5. Performance Rating Method Compliance:
   \note Fans-Parking Garage, Interior Lighting-Process, Cooking, Industrial Process, Elevators and Escalators.
   \type alpha
   \retaincase
   \default General

Lights,
  A5 , \field End-Use Subcategory
       \note Any text may be used here to categorize the end-uses in the ABUPS End Uses by Subcategory table.
       \note The following special tags will also place the end-use in specific rows in the LEED Summary table
       \note EAp2-4/5. Performance Rating Method Compliance:
       \note Fans-Parking Garage, Interior Lighting-Process, Cooking, Industrial Process, Elevators and Escalators.
       \type alpha
       \retaincase
       \default General
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While it isn't displayed in the Openstudio GUI, you can set the setEndUseSubcategory as shown here. This set in OpenStudio at the instance not the definition. So two different space types that use the same load definition can still have unique sub-categories.

David Goldwasser gravatar image David Goldwasser  ( 2016-10-25 11:31:55 -0500 )edit

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Asked: 2016-10-20 13:33:42 -0500

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Last updated: Oct 25 '16