RE: [EnergyPlus_Support] question about air-air heat recovery wit h economizer

["Dobbs, Gregory M UTRC" <dobbsgm@xxxxxxxxxxxx>]

My runs for New York WITHOUT ERV show heating energy with economizer higher
than without economizer.  Is this true for you also?  Do you agree?  If so,
do you understand why this is happening?

-----Original Message-----
From: Chaoqin Zhai [mailto:chaoqinz@xxxxxxxxxxxxxx] 
Sent: Thursday, November 04, 2004 2:46 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] question about air-air heat recovery with
economizer


Hi,

I have an air-air total heat recovery in the system. In addition, I set the
system could go into economizer mode when the outdoor condition is within a
certain limit. When I ran the simulation using EnergyPlus, an error message
is generated, which said: HEAT EXCHANGER:AIR TO AIR:GENERIC "ERV" average
air volume flow rate is <50% or >130% of the nominal HX supply air volume
flow rate.

To my understanding it is because the outside air flow rate is getting
higher than the minimum outside air flow rate, which is the same as nominal
air flow rate of the ERV, when the system is in economizer mode. Am I right?
Will this warning affect the calculation accuracy of the simulation?

Thanks a lot!


------------------------ Yahoo! Groups Sponsor --------------------~-->
$9.95 domain names from Yahoo!. Register anything.
http://us.click.yahoo.com/J8kdrA/y20IAA/yQLSAA/dkFolB/TM
--------------------------------------------------------------------~-> 

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



 




------------------------ Yahoo! Groups Sponsor --------------------~--> 
$9.95 domain names from Yahoo!. Register anything.
http://us.click.yahoo.com/J8kdrA/y20IAA/yQLSAA/dkFolB/TM
--------------------------------------------------------------------~-> 

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

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/