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[EnergyPlus_Support] AHU with plate heat exchanger and no mixing box, possible?
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- Subject: [EnergyPlus_Support] AHU with plate heat exchanger and no mixing box, possible?
- From: "andreacostaenergyplus" <andreacostaenergyplus@xxxxxxxxx>
- Date: Sun, 17 Apr 2011 15:39:08 -0000
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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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