All the zones connected to this air loop have no loads. They are all indirectly conditioned.
I think that if I use normal setpoints with always off availability, it will result in hours with unmet setpoints.
On 6.12.2012 01:39, Jim Dirkes wrote:
Miroslav,
I’m guessing that this is the only air loop… I have modeled other buildings where one or another zone had zero load, but always at least one zone had load – with no fatal errors.
How about using normal setpoints and making the availability always OFF?
James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Miroslav Bratanov
Sent: Wednesday, December 05, 2012 5:15 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] AirLoopHVAC has no air flow workaround?
James,
The program stops before the actual simulation. This is the full message from the .err file.
** Severe ** AirLoopHVAC AHU-RHT_BL has no air flow
** ~~~ ** Check flow rate inputs for components in this air loop and,
** ~~~ ** if autosized, check Sizing:Zone and Sizing:System objects and related inputs.
** Fatal ** Previous condition causes termination.
...Summary of Errors that led to program termination:
..... Reference severe error count=1
..... Last severe error=AirLoopHVAC AHU-RHT_BL has no air flow
************* Warning: Node connection errors not checked - most system input has not been read (see previous warning).
************* Fatal error -- final processing. Program exited before simulations began. See previous error messages.
On 6.12.2012 00:04, Jim Dirkes wrote:
Ignore the “error”. It does not prevent the simulation from running and, as you said, indicates a correct and proper condition.
E+ is just letting you know about an unusual condition.
James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Miroslav Bratanov
Sent: Wednesday, December 05, 2012 4:46 PM
To: EnergyPlus Support
Subject: [EnergyPlus_Support] AirLoopHVAC has no air flow workaround?
Hello all,
I have a building with some indirectly conditioned spaces and I am
modeling a system (PVAV with reheat) just to satisfy the requirement of
Appendix G that all conditioned spaces should be simulated as both
heated and cooled. I set higher and lower setpoint temperatures for the
heating and cooling respectfully, so the system would never turn on. But
during the simulation I get a severe error which says that AirLoopHVAC
has no air flow. Of course this is absolutely correct since there are no
any loads.
I wonder if anyone has had such case and what's the way to deal with
this problem?
Any help is highly appreciated!
Thank you!
Miroslav
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