RE: [EnergyPlus_Support] Air Exhaust from zones problem

[Pedro Peixeiro <pedro_peixeiro@xxxxxxxxxxx>]

It makes sense what you say. But there is a way to make sure you have 100% fresh air, like Mario said. I checked the Input/output reference, and it does say the following (relative to Controller:OutdoorAir, Field: Maximum/Minimum Fraction of Outdoor Air Schedule):

"If both the above schedules are given values of 1.0, the system works at 100% outdoor air"

For now, i'm just trying to make a simple system working by the most standard way possible, so I can get myself a systematic procedure that assures me adaptability to various situations, so I'll try not to forget the previous point.

Anyway, my problem still persists. I added the OutdoorAir:Mixer and the Controller:OutdoorAir but the program still gives me the same error:

Severe  ** Demand Side Outlet Node Name (Return Air Path or ZoneHVAC:EquipmentConnections) not valid = ZONE EQ1 OUTLET NODE
 ~~~   ** Occurs in AirLoopHVAC = UTANN

This node is defined as the outlet node of the AirLoopHVAC:ZoneMixer and the Demand Side Outlet Node in AirLoopHVAC.

Still need some tips-and-tricks to solve this one. thanks!

Pedro P.

---

To: energyplus_support@xxxxxxxxxxxxxxx
From: yli006@xxxxxxxxxxx
Date: Wed, 2 Jun 2010 13:13:37 -0400
Subject: RE: [EnergyPlus_Support] Air Exhaust from zones problem

 

I have seen many people wanted to use 100% outside air and does not know what to do.

If your OA intake volume rate is the same as the fan capacity and the zone air flow rate, the return air is automatically relieved, 100%.
 
If you do not connect the return air node of the zone to the OA mixer, the zone air is also 100% exhausted to the outside environment.
 
Am I right?
 

 Dr. Li  

 

---

To: EnergyPlus_Support@yahoogroups.com
From: pedro_peixeiro@hotmail.com
Date: Tue, 1 Jun 2010 08:43:12 +0000
Subject: [EnergyPlus_Support] Air Exhaust from zones problem

 

hello everyone.

i'm doing my first attempts on HVAC simulation, and i've hit my first wall. The system i'm trying to simulate is working with 100% outside air, and thus i need all zone air to be exhausted outside, with no return. My first idea was to use a AirLoopHVAC:ZoneMizer object to bundle all the air from the zones, and use the Outlet Node Name defined here as the Demand Side Outlet Node Name in the AirLoopHVAC object. But it seems E+ doesnt like my ideia, i'm getting a severe error saying the node name in the AirLoopHVAC object is not valid. If someone could point me out a hint or two on how to do this, or at least reference me an example file that uses a similar system, i would be very gratefull. thank you for your time!

Pedro.

---

30 days of prizes: Hotmail makes your day easier! Enter now

---

The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail. Get busy.

__._,_.___

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:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

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.

Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe

__,_._,___