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[EnergyPlus_Support] Re: No Outside Air!

Thanks Brent,

The OA controller is set up as you say (according to I/O reference: "This should be the outermost air node on the outdoor air path connected to the outdoor air stream for the mixer associated with this outdoor air controller.")

Zone exhaust? Are you talking about a Zone Ventilation object? If not, and you're talking about an extra fan on the return side of the air loop, I haven't got this in. I thought you could just model as per VAV but with mixing damper closed. I was planning to account for extract fan power with a factor on the supply fan. This seemed expedient, but if it's not the correct way then I need to remedy.

Thanks

Chris

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Griffith, Brent" <brent.griffith@...> wrote:
>
> Common issues here are
> 
> 1 the OA controller's actuated node needs to be moved outboard of the heat recovery device.
> 
> 2 zone exhaust fans will removing their volume flow from the return air.
> 
> ________________________________
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of chris_malc_yates
> Sent: Monday, December 07, 2009 11:22 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] No Outside Air!
> 
> 
> 
> Hi there!
> 
> I've constructed (read "mashed together various IDFs") a model with central AHU and Zone Fancoils. Everything appears to be connected together but there is something wrong with my Main AirLoop. Instead of 100% OA permanently, there appears to be no flow through the relief node and equal flows through the return and OA inlet nodes on the OA mixer. The building must be blowing up like a balloon!
> 
> I'm using heat recovery. Are there any common things that can go wrong? I've checked through as much as I can understand.
> 
> If anybody else has corrected an error like this, I'd be grateful to hear how.
> 
> Many thanks, in advance, from Blighty
> 
> Chris
>




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