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Output for Coil:Heating:Water consumption/rate

asked 2022-04-14 07:08:55 -0500

rafael.alonso's avatar

updated 2022-05-19 13:59:14 -0500

Hi all,

I'm looking for the right output to see the hourly heating rate in a Heating coil Coil:Heating:Water which is connected to a boiler plant. Is there any output showing what is going on at this specific component?

The boiler plant is also feeding around 50 radiators Coil:Heating:Water:Baseboard and 10 Celing panels Heating:LowTemperatureRadiant:VariableFlow, and I need to know which of all the components is generating the gas consumption on the boilers.

The output Heating Coil Total Heating Energy only seems to output the consumption of Electric Coils, but skips these Water based elements.

Thanks, Rafael

EDIT: The mtd file shows the heating coils/radiators related to each meter:

 Meters for 16509,HW BASEBOARD 4:Baseboard Total Heating Energy [J]
  OnMeter=EnergyTransfer:Facility [J]
  OnMeter=EnergyTransfer:HVAC [J]
  OnMeter=Baseboard:EnergyTransfer [J]

Is there a way to assign a new meter to each Baseboard and Water coil object? I don't see it in the water coil inputs

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answered 2022-04-14 07:29:16 -0500

updated 2022-04-14 08:31:12 -0500

After running your simulation, several output results are provided. Of these are the report data dictionary (rdd) and meter definition file (mtd).

If you look at the rdd file, you will see all available reports for your simulation. Add Output:VariableDictionary, IDF; to your input file and the format in the rdd allows cut-n-paste directly to your input file.

Output:Variable,*,Heating Coil Total Heating Energy,hourly;
Output:Variable,*,Heating Coil Total Heating Rate,hourly;

Output:Variable,*,Baseboard Total Heating Energy,hourly;
Output:Variable,*,Baseboard Total Heating Rate,hourly;

If you look at the mtd file you will see which components are connected to which meter. For example,

 Meters for 613,ZONE1BASEBOARD:Baseboard Total Heating Energy [J]
  OnMeter=EnergyTransfer:Facility [J]
  OnMeter=EnergyTransfer:HVAC [J]
  OnMeter=Baseboard:EnergyTransfer [J]


 For Meter=Baseboard:EnergyTransfer [J], ResourceType=EnergyTransfer, EndUse=Baseboard, contents are:
  ZONE1BASEBOARD:Baseboard Total Heating Energy
  ZONE2BASEBOARD:Baseboard Total Heating Energy
  ZONE3BASEBOARD:Baseboard Total Heating Energy

 For Meter=Electricity:HVAC [J], ResourceType=Electricity, Group=HVAC, contents are:
  ZONE1BASEBOARD:Baseboard Electricity Energy
  ZONE2BASEBOARD:Baseboard Electricity Energy
  ZONE3BASEBOARD:Baseboard Electricity Energy
  SUPPLY FAN 1:Fan Electricity Energy
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I didn't know about this meter definition file, thanks!

How can I edit on which meter an object is? Image added to the original post

rafael.alonso's avatar rafael.alonso  ( 2022-04-14 08:11:39 -0500 )edit

Look at example file 5ZoneAirCooled.idf and search for Meter:Custom. You will see how to connect component ENERGY use to a custom meter. See the docs.

  MyGeneralLights,         !- Name
  Electricity,             !- Resource Type
  SPACE1-1 Lights 1,       !- Key Name 1
  Lights Electricity Energy,  !- Output Variable or Meter Name 1
  SPACE2-1 Lights 1,       !- Key Name 2
  Lights Electricity Energy,  !- Output Variable or Meter Name 2
  SPACE3-1 Lights 1,       !- Key Name 3
  Lights Electricity Energy,  !- Output Variable or Meter Name 3
rraustad's avatar rraustad  ( 2022-04-14 08:25:40 -0500 )edit

FYI, you can look at ExampleFiles-ObjectsLink.html in the example files folder to see which example file uses which object you are trying to learn to use.

rraustad's avatar rraustad  ( 2022-04-14 08:33:33 -0500 )edit

thanks again @rraustad. Ok, so I see a Meter:Custom can group different simulation outputs. However, which is the right output variable to request for an object that uses hot water coming from a Boiler plant?

I'm a bit confused about which variables can I see about these objects that consume hot water coming from a Boiler plant. But I need to know where the demand for Hot water comes from (which one of the HW Baseboard, or Water heating coil).

rafael.alonso's avatar rafael.alonso  ( 2022-04-14 10:59:15 -0500 )edit

You have the individual heating coil or baseboard outputs (e.g., Heating coil/baseboard heating rate/energy) so you know which is on each timestep. Start with a Meter:Custom that monitors only 1 of your components. Then add slowly so you know what that result means. Look for energy report variables (J) in the rdd file to attach to one or more custom meters.

rraustad's avatar rraustad  ( 2022-04-14 16:27:04 -0500 )edit

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Asked: 2022-04-14 07:08:55 -0500

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Last updated: Apr 14