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How do i add an output measure to OpenStudio that shows the Monthly Overview Electricity Consumption (kWh) table for each zone in my model?

asked 2021-07-27 14:31:10 -0500

Jacob Parkinson's avatar

Hi everyone, I am trying to run some analysis on the electricity consumption broken down into heating, cooling, lights, equipment, etc. for each thermal zone of my model separately. Any help would be much appreciated. I am fairly new to openstudio and energy modelling.

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OpenStudio Results will give you plug loads and lighting by load instance, which often is also by zone unless you have multiple instances per zone. HVAC consumption is more complex. What does your system look like. All zone equipment, single zone air loops, multi zone air loops, plant loops etc.

David Goldwasser's avatar David Goldwasser  ( 2021-07-27 15:09:08 -0500 )edit

I agree. OpenStudio Results is the best option for what you are asking.

sashadf1's avatar sashadf1  ( 2021-07-27 18:23:33 -0500 )edit

Thank you. Understood for the plug loads and the lights, I have located those on the OpenStudio report. With regards to the heating and cooling, I have used the pre-packaged rooftop VAV system and have one per thermal zone. Is there a way to generate a table output detailing the energy consumption of the HVAC systems, split by heating, cooling, etc. in terms of kWh? It does not need to be split by month if that adds too much complexity, it can be the entire run period.

Jacob Parkinson's avatar Jacob Parkinson  ( 2021-07-28 06:35:03 -0500 )edit

For context, I am not looking at the design of the HVAC system sizing etc. The purpose of the model is to assess how the facade modifications can influence the energy consumption of the building for heating and cooling.

Jacob Parkinson's avatar Jacob Parkinson  ( 2021-07-28 06:36:35 -0500 )edit

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answered 2021-07-28 11:09:28 -0500

As mentioned in comments you can get plug loads and lighting in OpenStudio Results. If heating and cooling energy transfer (and not energy consumption) is fine for your study that is in the Annual and Peak Values - Other report in the EnergyPlus epllustbl.html file under the Energy Meters section.

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If you wanted to get consumption you could but that may take a custom report using annual or monthly output variables for the required components. You would have to decide if you wanted to look at fans consumption as well.

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thank you for your help, is there a way to add the heating, cooling and fans per zone to the Annual and Peak Values - Electricity table? I note that the table details the general values for heating, cooling and fan electricity but does not subdivided by zone. If it can not be added to the table is there an additional output measure I can add to achieve the same result?

Jacob Parkinson's avatar Jacob Parkinson  ( 2021-07-28 14:19:54 -0500 )edit

The equipment won’t be by zone, in your case it will be by air loop, and you just happen to have one air loop per zone, which makes it easier to map energy consumption back to a zone. You will likely have to look at the eplusout.rdd file and decide what variables you want. You can then look at them manually in a application that can view EnergyPlus SQL file or will have to write a new OpenStudio reporting measure. I’m not aware of one that exists that does exactly what you are describing. If this is a one of use case probably better just looking at the SQL file after adding output variables.

David Goldwasser's avatar David Goldwasser  ( 2021-07-28 14:42:16 -0500 )edit

I am struggling to be able to open to SQL file. I have been through the .mtd file and found the heating electricity consumption listed in the Annual and Peak Values - Electricity table is based on

Meter=Heating:Electricity [J], ResourceType=Electricity, EndUse=Heating, contents are: COIL HEATING ELECTRIC 2:Heating Coil Electricity Energy COIL HEATING ELECTRIC 4:Heating Coil Electricity Energy .....

how would I add a meter and readable output for each heating coil to see the electricity consumption? i can then do the same with cooling and fans and cross ref to my thermal zones

Jacob Parkinson's avatar Jacob Parkinson  ( 2021-07-29 02:19:16 -0500 )edit

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Asked: 2021-07-27 14:31:10 -0500

Seen: 272 times

Last updated: Jul 28 '21