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Re: [EnergyPlus_Support] Heat recovery warning
Search for HeatExchanger:AirToAir:SensibleAndLatent in the EnergyPlus
Engineering Reference ... it will explain this heat exchanger model, its
assumptions and its limitations.
johnnyklemke wrote:
> Hi all,
>
> I've been running a model with ASHRAE system 8 (VAV with heat recovery) and could not solve a warning with the heat recovery component:
>
> HeatExchanger:AirToAir:SensibleAndLatent "AHU HEAT RECOVERY"
> ** ~~~ ** Average air volume flow rate is <50% or >130% of the nominal HX supply air volume flow rate.
> ** ~~~ ** Air volume flow rate ratio = 7.454E-002. Occurrence info=SAO_PAULO/CONGONHAS - BRA TMY3-837800 WMO#=837800, 01/02 06:00 - 06:10
>
> ===== Recurring Error Summary =====
> ************* The following recurring error messages occurred.
> *************
> ************* ** Warning ** HeatExchanger:AirToAir:SensibleAndLatent "AHU HEAT RECOVERY": Average air volume flow rate is <50% or >130% warning continues. Air flow rate ratio statistics follow.
> ************* ** ~~~ ** This error occurred 999249 times.
> ************* ** ~~~ ** Max=0.499985 Min=7.383128E-002
>
> Can anyone help me on this? How can I solve this issue? I don't know how to measure this 50/130% of average air volume flow rate.
>
>
> Thanks,
> John
>
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