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What is the output that defines the cooling/heating loads that appear on Openstudio results?

asked 2019-04-26 08:56:15 -0600

anacun18 gravatar image

updated 2020-07-31 08:26:25 -0600

I want to know what output I should select to get the results of the heating / cooling loads that appear in the openstudio results, since I want to know what the contributorship of each hvac system is for heating and cooling. CAn someone help me?

best regards

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answered 2019-04-26 09:08:43 -0600

You may want to look at the Envelope and Internal Load Breakdown measure on BCL. It shows heat gain and loss by component type and by individual component.

Here are the output variables used for this measure

# monthly heat gain outputs
result << OpenStudio::IdfObject.load('Output:Variable,,Electric Equipment Total Heating Energy,monthly;').get
result << OpenStudio::IdfObject.load('Output:Variable,,Gas Equipment Total Heating Energy,monthly;').get
result << OpenStudio::IdfObject.load('Output:Variable,,Zone Lights Total Heating Energy,monthly;').get
result << OpenStudio::IdfObject.load('Output:Variable,,Zone People Sensible Heating Energy,monthly;').get
result << OpenStudio::IdfObject.load('Output:Variable,,Zone Infiltration Sensible Heat Gain Energy,monthly;').get
result << OpenStudio::IdfObject.load('Output:Variable,,Surface Window Heat Gain Energy,monthly;').get

# monthly heat loss outputs
result << OpenStudio::IdfObject.load('Output:Variable,,Zone Infiltration Sensible Heat Loss Energy,monthly;').get
result << OpenStudio::IdfObject.load('Output:Variable,,Surface Window Heat Loss Energy,monthly;').get

# hourly outputs (will bin by hour to heat loss or gain and roll up to monthly, may break out by surface type)
result << OpenStudio::IdfObject.load('Output:Variable,,Surface Average Face Conduction Heat Transfer Energy,hourly;').get

And here are some screenshots

image description

image description

image description I'd like to included gains and losses related to ventilation to this but have not had time to implement a good approach for that yet.

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I want to know the contribution of every avac system I have created. In openstudio results appears the total contribution of the systems, but I want to know individually.

anacun18 gravatar image anacun18  ( 2019-04-26 09:15:36 -0600 )edit

@anacun18 sorry, I mis-red the question. You should look in the eplousout.rdd file for variables specfic to component types used in your HVAC system, but should see a lot of variables like these that should let you look at cooling/heating capacity and electricity consumption.

Output:Variable,*,Cooling Coil Total Cooling Energy,hourly; !- HVAC Sum [J]
Output:Variable,*,Cooling Coil Total Cooling Rate,hourly; !- HVAC Average [W]
David Goldwasser gravatar image David Goldwasser  ( 2019-04-26 09:55:02 -0600 )edit

Thanks for the answer. I have noticed that the avac load profile obtained in the results in the openstudio results is equal to the heating / cooling facility that appears in the "end uses", but I still have difficulties in selecting the output for each zone, since the results that I get in the meter file is from all zones / systems.

anacun18 gravatar image anacun18  ( 2019-04-26 10:33:20 -0600 )edit

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Asked: 2019-04-26 08:56:15 -0600

Seen: 740 times

Last updated: Apr 26 '19