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[EnergyPlus_Support] RE: Measuring energy input to the rooms


I think the source of my confusion was that the return plenum as an object for the airflow calculations is the same as the zone containing it involved in the heat balance calculations. Is that true ? if yes, is it reasonable ? Therefore the Zone/Sys Sensible Cooling Rate is not null.


---In energyplus_support@xxxxxxxxxxxxxxx, <RRaustad@...> wrote:

The Zone/Sys Sensible Cooling Rate and Zone/Sys Sensible Heating Rate variables tell you how much energy is entering the zone through the zone inlet nodes. These will be non-zero if air enters the zone and that air had different conditions (T and RH) than the zone.

On 10/30/2013 8:59 AM, qureshi.faran@... wrote:

I am currently trying to measure from the amount of energy entering/leaving  in the rooms through the heating system.
I have found out that the  
Output:Variable,*,Zone/Sys Sensible Cooling Rate,hourly; !- HVAC Average [W] might do the trick but I now noticed something that makes me wonder.

I am currently using the ASHRAE standard commercial building model MediumOffice (location, Baltimore). It can be found there. I enclose a copy that i translated to version 7.2 of E+. This building has 3 stories with 3x5 zones + 3 plenums, where the return air paths are located. There is no terminal unit in the plenums. However, the record of Zone/Sys Sensible Cooling Rate for the plenums is non zero, but it is not clear for me where this energy is suppose


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