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.
Date: Sun, 3 Jul 2011 14:31:11 +0000
Subject: [EnergyPlus_Support] Can HVAC system take air from earth tubes instead of ambient?
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?
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
The group web site is:
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.