Re: [EnergyPlus_Support] Initialize Root Finder faltal error

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

This input file has several problems:

1) The control node for the Controller:Simple is set to the zone air node. 
Control nodes must be on the supply side of the air loop. A good choice would 
be the fan air outlet node.

2) There should be 2 Controller:simple's, 1 for each coil. The actuator node 
should be the coil water inlet node. This input file has the actuator node as 
the zone air inlet node.

3) There need to be some setpoints established by setpoint managers.

4) There is no supply air path or return air path.

I would recomment that you use COMPACT HVAC objects to create the system 
description, or find an example file with a similar system type and compare the 
structure of that input against your file.

Mike


On 14 Dec 2007 at 10:16, Ricardo Miranda wrote:

> Hello,
> 
>     I´m trying doing a simulation of a small room, served by a air loop that is
> supply by a heating plant loop with a boiler and a cooling plant loop with a
> chiller. When a simulate I don´t have any severe error but I have a fatal error
> that says " Fatal  ** InitializeRootFinder: Invalid min/max bounds
> XMin=100.000026 must be smaller than XMax=0.596970". I don´t know how resolve
> this. What is the problem?
> 
> Regards,
> Ricardo Miranda
> 
> 
> [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.pdf under the
> Documentation link 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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