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Re: [EnergyPlus_Support] FCU with Fresh air handling unit



A fresh air handling unit which feeds directly into the outside air intake of 
the fan coil units is not currently supported.  But you can approximate this 
fairly well by having the pre-treated outside air feed directly into the zone 
and the fan coil unit will serve the net remaining load.  To do this, 

1.  Define an AIR PRIMARY LOOP which treats the fresh air and use DIRECT AIR 
terminal units to feed the zone.  

2.  In the ZONE EQUIPMENT LIST, set the heating and cooling priorities to 1 for 
the DIRECT AIR (fresh air system) and 2 for the fan coils.  

3.  Use a NODE LIST object to specify more than one inlet node for the zone.  

4.  The fresh air system will need a return air node and a return air path, 
even if there will not be any return flow, it must be defined.

Mike


On 13 Feb 2007 at 10:33, jqplain wrote:

> Hi guys, How do you model system of FCU with fresh air handling
> unit?It seems there can only be one inlet for each zone and the the
> air from the AHU should be sent directly into the zone (can not be
> sent to the FCU).It looks impossible for me to do this kind of
> modeling. Thank,Samuel Jiang   
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> 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.
> 
> EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf and press the "search" button.
>  
> Yahoo! Groups Links
> 
> 
> 
> 
> 


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





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