You leave the computer for a few minutes and someone else steps in to help! Thanks, Chandan.
James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Fabiano Domingues Ferreira
Sent: Friday, September 21, 2012 2:18 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RES: RES: [EnergyPlus_Support] Re: Fan System Operation
It worked, thanks!
About the same project, could you tell how do I comply with the item G3.1.3 Heat Pumps from ASHRAE. I set the Maximum Outdoor Dry-Bulb Temperature for Supplemental Heater Operation at 4°C. Am I correct?
Thanks again for your help,
Fabiano Ferreira
De: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] Em nome de Chandan Sharma
Enviada em: Friday, September 21, 2012 2:56 PM
Para: EnergyPlus_Support@xxxxxxxxxxxxxxx
Assunto: Re: RES: [EnergyPlus_Support] Re: Fan System Operation
"Availability Manager Night Cycle Control Status", IO Ref 1411/1932.
In you input file, coils, fan, and heatpump have availability schedule '10002" which is off in the night. In order for night cycle to work, coils and heatpump should be available in the night.
So only fan should have availability schedule 10002 and everything as '2' in your file. This should reduce unmet setpoint hours.
Night cycle only turns on the fan. It does not turn on the coils.
On 9/21/2012 1:46 PM, Fabiano Domingues Ferreira wrote:
Jim,
Follow attached the idf.
Chandan, where do I see the Night cycle status output?
Thanks,
Fabiano Ferreira
De: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] Em nome de Chandan Sharma
Enviada em: Friday, September 21, 2012 2:30 PM
Para: EnergyPlus_Support@xxxxxxxxxxxxxxx
Assunto: Re: [EnergyPlus_Support] Re: Fan System Operation
What is Night cycle availability status output when the fan is scheduled off? Just to make sure that night cycle manager is cycling the fan on when zone temperature are beyond setpoint +/- (0.5*tolerance).
On 9/21/2012 1:21 PM, Jim Dirkes wrote:
We’re getting closer!
I suspect that a schedule is keeping the fan off when it should be on. I am willing to take a look at your file to see what might be happening.
James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of fabiano.ferreiracw
Sent: Friday, September 21, 2012 12:57 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: Fan System Operation
Jim,
The problem is that the result shows that the temperature during unnocupied hour fall out of the setpoint. Addionaly the Time Setpoint Not Met during unnocupied hour is 864,50 hours.
Thanks,
Fabiano Ferreira
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Jim Dirkes <jim@...> wrote:
>
> Fabiano,
> It sounds as though you are using the correct "tools" in EnergyPlus.
> Report the zone temperatures during the unoccupied periods and compare to the zone setpoint. If the temperature does not exceed the setpoint in the cooling season or fall below the setpoint in the heating season, then the fan should remain off.
> p.s., EnergyPlus assumes that a zone is in the "occupied" period whenever any people are present. If your People object schedule shows non-zero values (e.g. 0.02), then it is an "occupied" period.
>
> James V Dirkes II, PE, BEMP, LEED AP
> www.buildingperformanceteam.com<http://www.buildingperformanceteam.com/>
> Energy Analysis, Commissioning & Training Services
> 1631 Acacia Drive, Grand Rapids, MI 49504 USA
> 616 450 8653
>
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of fabiano.ferreiracw
> Sent: Friday, September 21, 2012 9:11 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Re: Fan System Operation
>
>
>
> Hi James,
>
> The AHU works from 07:00 to 21:00 on weekdays and on weekends it stays off.
> Using the AvailabilityManager:NightCycle, I set the thermostat tolerance to 1°C (to check if the system is working), the zone setpoint temperature is 24°C. The results shows that the system has not cycle, even on weekends.
>
> Fabiano Ferreira
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com>, Jim Dirkes <jim@<mailto:jim@>> wrote:
> >
> > The fan will operate only if the zone exceeds the setpoint temperature. Did your control zone temperature go outside that setpoint?
> >
> > James V Dirkes II, PE, BEMP, LEED AP
> > www.buildingperformanceteam.com<http://www.buildingperformanceteam.com/>
> > Energy Analysis, Commissioning & Training Services
> > 1631 Acacia Drive, Grand Rapids, MI 49504 USA
> > 616 450 8653
> >
> > From: EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com>] On Behalf Of fabiano.ferreiracw
> > Sent: Friday, September 21, 2012 8:38 AM
> > To: EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com>
> > Subject: [EnergyPlus_Support] Fan System Operation
> >
> >
> >
> > Hi,
> >
> > To comply with the item G3.1.2.4 Fan Sytem Operation from ASHRAE 90.1-2007, where the fan needs to operate continuosly whenever spaces are occupied and shall cycled to meet heating and cooling loads during unoccupied hours, I used the AvailabilityManager:NightCycle tool with control type CycleOnControlZone. However checking the annual results, the fan didn't cycle at any time during unnocupied hour. Does anyone know what happened? I have tried use the fan type ON/OFF to comply with the item, but the result was the same.
> >
> > Regards,
> >
> > Fabiano Ferreira
> >
>
The information contained in this communication is confidential, may be privileged and is intended for the exclusive use of the above named addressee(s). If you are not the intended recipient(s), you are expressly prohibited from copying, distributing, disseminating, or in any other way using any information contained within this communication. If you have received this communication in error please contact the sender by telephone or by response via mail.
We have taken precautions to minimize the risk of transmitting software viruses, but we advise you to carry out your own virus checks on any attachment to this message. We cannot accept liability for any loss or damage caused by software viruses.
__._,_.___
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.
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
__,_._,___