For fan operating mode schedules;;cycling = 0, continuous = 1
On 7/22/2011 2:58 AM, Jean marais wrote:
To add to Richards comments, the operating mode schedule changes the fan mode from Continuous to Cycling. A cycling fan cycles on and off to meet the loads.
Make sure the fan is scheduled always on and think about a setback temperature for your thermostat during unoccupied times.
Then use the control mode schedule to change the control mode (0=continuous, 1=cycling...I think) of the fan. You could possibly reference the same schedule here as your occupancy schedule because eplus accepts zeros as zeros and nonzero fractions as 1, when it expects a 0/1 input.
This approach is the alternative to the nightmanager.
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Richard Raustad <RRaustad@...> wrote:
>
> Use the fan operating mode schedule to change modes from day to night.
>
> From the PackagedTerminalHeatPump.idf example file.
>
> ZoneHVAC:PackagedTerminalHeatPump,
> Zone1PTHP, !- Name
> SupplyFanSch; !- Supply Air Fan Operating Mode Schedule Name
>
> Schedule:Compact,
> SupplyFanSch, !- Name
> Fraction, !- Schedule Type Limits Name
> Through: 12/31, !- Field 1
> For: AllDays, !- Field 2
> Until: 7:00,1.0, !- Field 3
> Until: 17:00,0.0, !- Field 3
> Until: 24:00,1.0; !- Field 3
>
>
>
> On 7/21/2011 4:33 PM, riccianop6 wrote:
> >
> > Hi All,
> >
> > I need satisfy the section G3.1.2.4 of Ashrae Standard 90.1-2007.
> >
> > "Supply and return fans shall operate continuously whenever spaces are
> > occupied and shall be cycled to meet heating and cooling loads during
> > unoccupied hours".
> >
> > So, I'm using PTHP system in the building.
> >
> > How can I simulate it if I have no night cycle in this kind of HVAC?
> >
> > Thanks!
> >
> >
>
> --
> Richard A. Raustad
> Senior Research Engineer
> Florida Solar Energy Center
> University of Central Florida
> 1679 Clearlake Road
> Cocoa, FL 32922-5703
> Phone: (321) 638-1454
> Fax: (321) 638-1439 or 1010
> Visit our web site at: http://www.fsec.ucf.edu
>
> UCF - From Promise to Prominence: Celebrating 40 Years
>
-- Richard A. Raustad Senior Research Engineer Florida Solar Energy Center University of Central Florida 1679 Clearlake Road Cocoa, FL 32922-5703 Phone: (321) 638-1454 Fax: (321) 638-1439 or 1010 Visit our web site at: http://www.fsec.ucf.edu UCF - From Promise to Prominence: Celebrating 40 Years
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