[Bldg-sim] eQuest - Modelling Earth Air Tunnel system

[JRR]

JRR wrote;

    In Energy Plus you could put a purchased air node on the EAT and 
then discount it via its separate
    meter after the run is done....

Steve Mignogna wrote:
> Vishnuraj-
>
> This is very difficult and may not lead to the correct results, but 
> one method would be to manually edit the weather file.  You would need 
> to change the temperatures so that the outdoor air that is pulled into 
> the system would be at the temperature of the earthduct preconditioned 
> air.  However, I would not recommend doing this without testing to see 
> how it changes the other aspects of the simulation.
>
> I have seen earthducts modeled correctly in both MATLAB and TRNSYS but 
> I have not successfully modeled it within eQuest.
>
> -- 
> Steve Mignogna
> Atelier Ten
>
>
>
> On Wed, Feb 18, 2009 at 2:48 AM, Vishnuraj Nair <vishnu at kalpakrit.com 
> <mailto:vishnu at kalpakrit.com>> wrote:
>
>      
>
>     Hi friends,
>
>      
>
>     I am trying to model an Earth Air Tunnel (EAT) system that is
>     being used in a school for passive precooling.
>
>     During summer first the air is pre cooled using the EAT and then
>     evaporative cooling is done before being circulated into the zone.
>
>     During monsoon again precooling is done using EAT and then
>     chillers are being used for further cooling and dehumidification.
>
>     Does anyone have any idea as to how to calculate and incorporate
>     the degree of precooling that is achieved by the EAT into the
>     eQuest model.
>
>     Any help would be greatly appreciated. Thanks
>
>     Vishnuraj Nair
>
>     Kalpakrit Sustainable Environments Pvt. Ltd. 
>
>     New Delhi
>
>     Tel: +91.124.4309490-92 Ext: 312 , Fax: +91.124.4309493
>
>     E-mail : vishnu at kalpakrit.com <mailto:vishnu at kalpakrit.com>
>
>      
>
>
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