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Re: [EnergyPlus_Support] question about air-air heat recovery with economizer
Economizer choice for Controller:Outside Air should be set to "Bypass"
when heat recovery is used. See Heat Exchanger:Air To Air:Generic in
the IO Reference Manual for further details.
Chaoqin Zhai wrote:
> 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!
>
>
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--
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
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