Re: [EnergyPlus_Support] Air node energy balance

[Linda Lawrie <linda@xxxxxxxxxxxxxx>]

I'd suggest you send your question and your input file to
the helpdesk.

At 08:45 AM 6/22/2010, Liam O'Brien wrote:

Hi All,

I'm trying to debug a model and have been looking at an energy balance in each zone.  I would have expected the sum of the following report variables at any given time to be near 0 (except for rounding errors).  However, I've discovered that they only way to achieve this is to have a fixed zone temperature (i.e., cooling setpoint = heating setpoint).  I would have expected the Storage variable would reflect any rises and falls in air node temperature and maintain a balance (sum=0).  It also doesn't balance over a year.  The deviation report variable is 0, indicating that everything's correct.  Does anyone know what's going on?  Thanks!

Liam O'Brien

Zone Air Balance Internal Convective Gains Rate [W](Hourly)     
Zone Air Balance Surface Convection Rate [W](Hourly)    
Zone Air Balance Interzone Air Transfer Rate [W](Hourly)        
Zone Air Balance Outdoor Air Transfer Rate [W](Hourly)  
Zone Air Balance System Air Transfer Rate [W](Hourly)   
Zone Air Balance Air Energy Storage Rate [W](Hourly)    

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