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[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, Jim Dirkes <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@xxxxxxxxxxxxxxx] On Behalf Of fabiano.ferreiracw
> Sent: Friday, September 21, 2012 8:38 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> 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
>




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