Re: [EnergyPlus_Support] Heat exchanger

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

Your assumption is correct that this gets used in computing the part load 
effectiveness.  If you are not seeing warnings, my guess is that the flow rate 
through the heat exchanger is not what you think it is.  It is probably off due 
to a control issue.  I would suggest reporting the volume flow rate at the 
inlet nodes to the heat exchanger to see what is happening.

Mike


On 19 May 2006 at 15:29, tonybaxterhevacomp wrote:

> 
> Hello anyone,
> 
> I am using a HEAT EXCHANGER:AIR TO AIR:GENERIC, my question relates to 
> the 'Nominal Supply Air Flow rate'.  The manual states that actual flow 
> rates should be within 50% to 130% of this or a warning will be given.  
> I have tried various values (eg 0.9, 9) with an air lfow rate of 0.3, 
> but get no warning, which I assume would be on the .err file.  Does 
> this field matter - I assume that part load effectiveness uses this 
> field, but I am using a constant efficiency independent of low rate.
> 
> Many thanks
> 
> Tony Baxter
> 
> 
> 
> 
> 
> 
> 
> 
> 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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