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# How is being calculated cooling (electricity consumption) of monthly overview ?

Hi all,

I am using OpenStudio 1.12.4, I want to know what equation is being used to know these values of cooling, I know that interior equipment is design level (Watt) X time that equipment is used (schedule). Is the cooling the Rated Total Cooling Capacity (Watt) X time HVAC has to work ? If it is like this, is there any way to know these values of time ?

I know the meter Cooling: Electricity can show cooling values and you choose the frequency, but like I said I want to know how do you get these cooling values.

My HVAC system is Packaged Rooftop Air Conditioner, used in OpenStudio.

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The energyConsumptionByMonth method is used. This in turn is pulled from the EnergyPlus BUILDING ENERGY PERFORMANCE tabular report.

To dig a little deeper, Here is the code in the OpenStudio Results measure that calls the method.

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Thanks for your time, but still isnt what I want, I want how is being calculated, like what are the equations, the variables, isnt the code of OpenStudio that I am looking for.

( 2016-12-05 23:19:24 -0500 )edit

The EnergyPlus tabular report sums monthly fuel consumption by end use. So no time-series output variables are requested as part of the simulation. OpenStudio just query's the EnergyPlus tabular data.

( 2016-12-06 09:53:58 -0500 )edit

I understand what are you saying,but you are giving me the final result, the values of cooling. I want to know how to get there, is the cooling(electricity) the Rated Total Cooling Capacity (Watt) X time HVAC has to work ? Per example I know the equation of balance heat because I found in the Engineering reference of energyplus (PDF), I want to know the same, but about how the cooling is calculated.

( 2016-12-06 11:32:52 -0500 )edit