Re: [EnergyPlus_Support] Energy Plus-Starting point

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

Zoning comes first, but the discussion in the Getting Started manual assumes 
that the system designer has already determined what types of air handling 
systems will be used to serve the various space types.  So the zoning in that 
example is guided by the equipment selection.  (Ignore the flow rates listed in 
the table - these were calculated later and should not be shown at this point 
in the discussion.)  In many projects, the designer may know from experience or 
prevailing practice the types of air handling systems that will be applied to a 
particular building type.  In other cases, a wide range of system types may be 
compared in the simulation tool.

An alternative way to look at thermal zoning is to think in terms of space 
type.  Spaces with similar occupancy profiles and similar temperature controls 
can be grouped into a thermal zone.

Mike



On 4 Jul 2005, at 22:06, miau1962 wrote:

> Hello
> 
> I am new in building simulation.
> I've started reading the "Information necessary to run Energy Plus" 
> chapter in the "gettingstarted..."" manual, and I´ve a question 
> about the way we zone a site.
> In the manual:
> ...
> 
> The general rule then is to use the number of fan systems (and 
> radiant systems) not the number
> of rooms to determine the number of zones in the building. The 
> minimum number of zones in
> a general simulation model will usually be equal to the number of 
> systems serving the
> building.
> Five systems were designed to serve the Ft. Monmouth Education 
> Center.
> 
> 
> System
> Number       System Name                CFM     Zone Served
> 1            Four Pipe Fan Coil         3900     Zone 1
> 1            Four Pipe Fan Coil        2500      zonre 2
> 2           Single Zone Draw Through    400       Zone 3
> 3            Single Zone Draw Through   2250      Zone 5
> 4          Single Zone Draw Through     2450     Zone 6
> 5            Unit Heater                185      Zone 4
> 5                Unit Heater             41      Zone 7
> ...
> 
> What fan systems do the text refer?
> Is it the minimun requirement for ventilation porpose?
> If not how can we have a fan system flow rate, if we still don't 
> know the loads involved?
> What will come first: Zoning, or fan system design?
> Is not the Energy Plus the starting point for the design process?
> 
> What am I missing here?
> 
> Thank very much in advance,
> 
> Vítor 
> 
> 
> 
> 
> 
> 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
> 
> 
> 
> 
> 
> 
> 
> 



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




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