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[EnergyPlus_Support] Re: AHU with plate heat exchanger and no mixing box, possible?
- To: EnergyPlus_Support@xxxxxxxxxxxxxxx
- Subject: [EnergyPlus_Support] Re: AHU with plate heat exchanger and no mixing box, possible?
- From: "andreacostaenergyplus" <andreacostaenergyplus@xxxxxxxxx>
- Date: Thu, 21 Apr 2011 13:35:29 -0000
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Hi all,
Would anybody be able to give be an help on the issue below?
Many thanks in advance,
Andrea
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "andreacostaenergyplus" <andreacostaenergyplus@...> wrote:
>
> Dear All,
>
> I am modelling an AHU with a plate heat exchanger an no mixing box.
> It seems that this is not possible in E+ and that I must have an OutdoorAir:Mixer object in the AirLoopHVAC:OutdoorAirSystem:EquipmentList.
> Can anybody confirm this limitation?
> This is the error that I get:
>
> ** Severe ** OutdoorAir:Mixer for AirLoopHVAC:OutdoorAirSystem AHU1_OUTDOOR_AIR_SYSTEM not found.
> ** Fatal ** GetAirPathData: Errors found getting AirLoopHVAC
>
>
>
> I tried a workaround, having the OutdoorAir:Mixer and imposing a Minimum Fraction of Outdoor Air Schedule constanly equal to 1.
> But this lead to the follwoing warnings:
>
> ** Warning ** HeatExchanger:AirToAir:SensibleAndLatent "OA HEAT RECOVERY 1": Average air volume flow rate is <50% or >130% warning continues. Air flow rate ratio statistics follow.
>
> ** Warning ** HeatExchanger:AirToAir:SensibleAndLatent "OA HEAT RECOVERY 1": Unbalanced air volume flow ratio exceeds 2:1 warning continues. HX flow ratio statistics follow.
>
> Is there any better solution to this issue?
> I would kindly appreciate anyone's help on this.
> Kind regards,
> Andrea
>
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