Re: [EnergyPlus_Support] Airflow Network model doubt

[Lixing Gu <gu@xxxxxxxxxxxx>]

David:

The document is correct. The AirflowNetwork model can calculate multizone 
airflows driven by wind, either the HVAC system fan is off with inputs of 
forced air distribution, or no forced air distribution system is specified. 
In addition, the model can calculate multizone airflows driven by wind and 
forced air through the forced air distribution system when the HVAC system 
fan is on. In other words, the model calculates multizone airflows with wind 
only or with wind and forced air together.

Natural ventilation is a way to deal with zoned airflows without including 
air distribution system. The alternative way is to use the AirflowNetwork 
model to calculate multizone airflows driven by wind with the similar 
approach, excluding air distribution system.

EnergyPlus always calls Predictor and Corrector with and without HVAC 
systems. The difference is that if there is no HVAC system, the system load 
in the corrector is zero.

Lixing Gu

----- Original Message ----- 
From: "David Barrera" <davidabraham_b@xxxxxxxxx>
To: "Grupo EPlus" <energyplus_support@xxxxxxxxxxxxxxx>
Sent: Tuesday, February 06, 2007 3:58 PM
Subject: [EnergyPlus_Support] Airflow Network model doubt


> Dear all:
>
> In the documentation it is specified that
> AirflowNetwork model is able to calculate
> multizone airflows driven by wind when the HVAC system
> fan is off or when no forced air distribution system
> is specified for the simulation, is that correct? On
> the other hand I've read the Engineering Reference
> document for those topics related to advanced
> calculations of Natural Ventilation, (i.e.
> AirflowNetwork model considering no HVAC system
> defined), but all time it tells  me about "simulate
> SYSTEM" or "predict SYSTEM capability", etc. Then how
> does the process of prediction-correction works if
> there's no "system to simulate"?
>
> Thanks a lot.
>
>
>
>
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