Re: [EnergyPlus_Support] Verification of Purchased air heating/cooling energy value

["Michael J. Witte" <mjwitte@xxxxxxxx>]

Rajendra:

What you are trying to do is not simple.  It is only possible for a 
steady-state case or a building with no thermal mass.  When thermal 
mass is present, heat gains and HVAC loads do not coincide.

For internal loads, individual report variables are available for 
people, lights, etc.  There are also a set of total convective, 
radiant, etc. gains for the zone.  These variables are named:

Zone-Total Radiant Heat Gain[J]
Zone-Total Convective Heat Gain[J]
etc.

For windows, Window Heat Gain[W] and Window Heat Loss[W] is reported 
for individual windows.  Or Zone Window Heat Gain[W] and Zone Window 
Heat Loss[W] report the total for all windows in a zone.

For opaque exterior surfaces, it is more difficult.  The load on the 
space from an opaque surface is determined by the temperature 
difference between the inside surface temperature and the air 
temperature multiplied by the inside convection coefficient.

Mike




On 11 Apr 2003, at 16:46, Rajendra Adhikari wrote:

> Hi everyone,
> 
> I simulated a simple building without any plants and obtained the
> values of Purchased air heating/cooling energy. I am also trying to
> verify this value by total sum of the various energy exchanges using
> different set of related outputs. But I did not get proper energy
> balance. Could any body tell the right set of parameters to verify
> energy balance in terms of related outputs e.g. 
> Infiltrations(gains/losses),  solar gains(through windows and opaque
> surfaces), thermal losses (through windows and opaque surfaces),
> internal gains (electricity equipments, people).?
> 
> Rajendra
> 
> 
> 
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