Re: [EnergyPlus_Support] zone load calculation?

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

In order to determine heating and cooling loads in EnergyPlus, you need to 
specify temperature controls and some type of HVAC system.  The simplest system 
is "purchased air" which is an infinite supply of hot and cold air.  This can 
be used to calculate loads without specifying a full HVAC system.  There is a 
sample file called "PurchAir.idf" in the EnergyPlus\ExampleFiles folder which 
will show you the objects required.

However, it is critical that users understand the limitations of the PURCHASED 
AIR model.  The description of the model and its outputs beings on p. 520 of 
the Input Output Reference (pdf p. 548, version 1.2.0). 

Mike

On 2 Dec 2004, at 12:17, hbn_pch wrote:

> 
> 
> Dear,
>   I meet a new problem.For a long time,i calculate zone load with the 
> sum of the Zone-Total Internal Radiant Heat Gain,Zone-Total Internal 
> Convective Heat Gain,Zone-Total Internal Visible Heat Gain,Zone-Total 
> Internal Latent Gain and Zone-Total Internal Radiant Heat 
> Gain.Today,i found these values are just the internal load,such as 
> people,lights and equipments(Is it right?).
>   Then a problem come in,how can i calculate the zone load?In other 
> words,what report variables should i add in the report variable 
> object to calculate the zone load???
>   Another problem,in the .eio<Zone Sizing Information>,the cooling 
> and heating load is the load in the design day(Is it right?).Are 
> these two load values calculated in the worst condition?Are they 
> biggest?
>   I'am a newbie in this field,appreciated to your kind help.Thanks
> 
>   pch 
> 
> 
> 
> 
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
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> 
> 
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> 



========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx




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