Re: [EnergyPlus_Support] air density in the heat balance

[Fred Buhl <wfbuhl@xxxxxxx>]

 Could you tell us what section or page of the Engineering Reference you
 are looking at?

Fred Buhl

direzionecontraria wrote:
> Hello!
> I refer to "Engineering Reference" 
> http://apps1.eere.energy.gov/buildings/energyplus/pdfs/engineeringrefere
> nce.pdf
> In the equations of the heat balance on the zone, for example in the 
> equation (2), there is the term Cz, which is the air capacitance.
> Cz = (air density )*(volume of the zone)
> I read that the standard air density is 1.204 kg/m3.
> What are the standard conditions ? How is the air density calculate in 
> different conditions from the standard conditions?
> With Regards
> Francesco
>
>
>
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