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RE: [EnergyPlus_Support] Can HVAC system take air from earth tubes instead of ambient?

I think, you can feed the ET air to a small room (a separate zone) and then exhaust or return it to the OA mixer, or a HVAC system..  

The HVAC system does not know whether the air is from the room or the OA mixer.
The OA mixer box is actually an  air splitter, an air  by-pass path, and an air mixer.  The releaf node air is fed to the inlet node via the environment.
If the inlet air volume low or zero, all the zone  return air is directed to the HVAC system.
You need to decide which part of the building air is to be relieved with an exhaust fan, so that the ET air is not relieved at the OA mixer.
There may be other ways.  Think of an pratical real system installation and then map it into the EPlus simulation system.
The idea is similar to the domestic hot water system.  The water from a tank  to the showers, etc. are thrown away and replaced by the main water supply.

 Dr. Li  


To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: wasilqayyum@xxxxxxxxxxx
Date: Sun, 3 Jul 2011 14:31:11 +0000
Subject: [EnergyPlus_Support] Can HVAC system take air from earth tubes instead of ambient?

Hello all,

I'm simulation earth tubes for pre-cooling.

However, the issue im having is that earth tubes output air directly into a zone (building). But can I have it output air to a HVAC system instead? or have an HVAC accept air from the earth tubes?



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