I have not been using the latest version very much.
I do not think that the IdealLoadsAirSystem has a fan, therefore there is not fan power output.
The Ventilation object you have mentioned seems to be the Zone:Ventilation:DesignFlowRate which has a fan to force the air through the zone, but do not have a real fan. I believe there is an item in the Summery Table called the vertual Fan usage.
I shall run your IDF and see whether it is there.
If you use the night ventilatin with the OA controller, the normal HVAC fan would be used. But the IdealLoadsAirSystem do not have a fan, and I am not sure whether the ventlation is added to the new version. Infiltratin do not have a fan. You can still increase the OA intake at night using IDealLoadAirSystem, if it can be scheduled, as infiltaration.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: nirajpdl@xxxxxxxxx
Date: Mon, 16 Jul 2012 12:55:47 -0400
Subject: [EnergyPlus_Support] Zone Ventilation Fan Electric Consumption
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I do not think that the IdealLoadsAirSystem has a fan, therefore there is not fan power output.
The Ventilation object you have mentioned seems to be the Zone:Ventilation:DesignFlowRate which has a fan to force the air through the zone, but do not have a real fan. I believe there is an item in the Summery Table called the vertual Fan usage.
I shall run your IDF and see whether it is there.
If you use the night ventilatin with the OA controller, the normal HVAC fan would be used. But the IdealLoadsAirSystem do not have a fan, and I am not sure whether the ventlation is added to the new version. Infiltratin do not have a fan. You can still increase the OA intake at night using IDealLoadAirSystem, if it can be scheduled, as infiltaration.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: nirajpdl@xxxxxxxxx
Date: Mon, 16 Jul 2012 12:55:47 -0400
Subject: [EnergyPlus_Support] Zone Ventilation Fan Electric Consumption
Dear all,
I have modeled an office room with night time forced ventilation that turns on when the outdoor temperature is 2 degrees below the indoor temperature. Since I am not familiar with HVAC systems I am having difficulty obtaining the fan electric consumption using an ideal air loads system. I have attached my .IDF file to this email. If anyone has the time to look at the Ventilation Object and help me figure out the "Zone Ventilation fan electric consumption" I would greatly appreciate it.
Furthermore, the I/O Reference states that when using the balanced "ventilation type" as opposed to intake or exhaust, the fan electric consumption would be twice that of intake or exhaust. When in fact, intuitively it seems as though if you have two fans working in tandem (one intake, one exhaust = Balanced) each fan only needs to work half as much if there were only one fan, to get the job done?
Thanking you,
Niraj Poudel
--
Niraj Poudel, Architectural Engineer.
PhD student, PDBE Program.
Clemson University, Clemson, SC.
__._,_.___
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.
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