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Re: [EnergyPlus_Support] Is it possible to feed an AHU with preecooled indoor air ??





Dear Jason,
Thank you for the answer.I will try it with EMS now. I have never used EMS routines before so I would really appreciate it if you could share the example routine with me.
Regards,
Meltem


From: Jason Kirkpatrick <jason.alan.kirkpatrick@xxxxxxxxx>
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Tuesday, November 1, 2011 1:20 AM
Subject: Re: [EnergyPlus_Support] Is it possible to feed an AHU with preecooled indoor air ??

 
Hello.  Yes it is possible to achieve this, but I have found it easiest to perform this in two separate simulations. The first simulation is of the thermal labyrinth only. You will report the air properties at the exit of the thermal labyrinth. This will be made into an hourly schedule of the air properties at the thermal labyrinth outlet.  Then have your regular simulation with the AHU, but use the EMS runtime routines to replace the outdoor air properties at the AHU outdoor air inlet node with a schedule:file object linked to the output of the thermal labyrinth simulation.

Give it a try. Let me know if you can't figure it out and I will post an example code.

-Jason

On Mon, Oct 31, 2011 at 9:58 AM, bayraktarmeltem <bayraktarmeltem@xxxxxxxxx> wrote:
 
Hello everybody, I am tryin to model a Labyrinth that provides precooled air to central AHU. I was wondering if it would be possible model such a system in energyplus. My approach was to geometrically model the labyrinth as 5 contagious rooms with high thermal mass. The outdoor air is then introduced to first room of the labyrinth through infiltration then the room air is mixed with next room through zone mixing. From the last room the air needs to be intoduced to AHU but I am not sure how to do this. I was thinking of setting the last room as supply plenum or connecting the system through node names of OAMixer but not sure which node names goes where? I am wondering if it is possible to feed an AHU with indoor air of a room where you don't return it to the same room but exhaust it to outdoors instead. I will really appreciate if someone can give me a hint.
Thanks a lot!






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