RE: [EnergyPlus_Support] Re: Schedule 10001 - Output Value is time shifted

I simulated the file, and noticed that the .SVG file reported all the following unused on parent objects.

<text x="   200" y=" 5920">Unused Non-Parent Objects:</text>
<text x="   220" y=" 5940">OutdoorAir:Node</text>
<text x="   220" y=" 5960">OutdoorAir:Node</text>
<text x="   220" y=" 5980">OutdoorAir:Node</text>
<text x="   220" y=" 6000">OutdoorAir:Node</text>
<text x="   220" y=" 6020">OutdoorAir:Node</text>
<text x="   220" y=" 6040">OutdoorAir:Node</text>
<text x="   220" y=" 6060">OutdoorAir:Node</text>
<text x="   220" y=" 6080">OutdoorAir:Node</text>
<text x="   220" y=" 6100">OutdoorAir:Node</text>
<text x="   220" y=" 6120">OutdoorAir:Node</text>
<text x="   220" y=" 6140">OutdoorAir:Node</text>
<text x="   220" y=" 6160">OutdoorAir:Node</text>
<text x="   220" y=" 6180">OutdoorAir:Node</text>
<text x="   220" y=" 6200">OutdoorAir:Node</text>
<text x="   220" y=" 6220">OutdoorAir:Node</text>
<text x="   220" y=" 6240">OutdoorAir:Node</text>
<text x="   220" y=" 6260">OutdoorAir:Node</text>
<text x="   220" y=" 6280">OutdoorAir:Node</text>
<text x="   220" y=" 6300">OutdoorAir:Node</text>
<text x="   220" y=" 6320">OutdoorAir:Node</text>
<text x="   220" y=" 6340">OutdoorAir:Node</text>
<text x="   220" y=" 6360">OutdoorAir:Node</text>
<text x="   220" y=" 6380">OutdoorAir:Node</text>
<text x="   220" y=" 6400">OutdoorAir:Node</text>
<text x="   220" y=" 6420">OutdoorAir:Node</text>
<text x="   220" y=" 6440">OutdoorAir:Node</text>
<text x="   220" y=" 6460">OutdoorAir:Node</text>
<text x="   220" y=" 6480">OutdoorAir:Node</text>
<text x="   220" y=" 6500">OutdoorAir:Node</text>
<text x="   220" y=" 6520">HOT WATER LOOP HW TEMP MANAGER</text>
<text x="   220" y=" 6540">118129 AHU SUPPLY AIR TEMP MANAGER</text>
<text x="   220" y=" 6560">118145 AHU SUPPLY AIR TEMP MANAGER</text>
<text x="   220" y=" 6580">118188 AHU SUPPLY AIR TEMP MANAGER</text&

In a real building, the minimum fresh air can be provided with infiltration to each zone. It is then not necessary to keep the fan running, when the HVAC sys is in the off condition.

I cannot display the DXF and have no idea how the 29 zones are connected, without looking at the geometry in detail.

OpenStudio would not display the building and did not show any error message. It just went into a non responding state.

Great! That nails it. Now I must just figure out if I comply with the following statement from ASHRAE 90.12007 G3.1.2.4 Fan System Operation

"Supply and return fans shall operate continuaously whenever spaces are occupied and shall be cycled to meet heating and cooling loads during unoccupied hours."

My system type is three and specifies a "Constant Volume Fan"

I'm not sure if Fan:ConstantVolume will cycle during occupied hours or unoccupied hours depending on load. It goes on and off purely by fan schedule, no?

Then the Fan:OnOff is the right one and behaves exactly as (now thanks to your knowlege given) expected.

After trying all this the proof of the pudding will be the Min. ODA during occupied hours report...I'll let you know if all goes well.

Thanks again.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Richard Raustad <RRaustad@...> wrote:
>
> When using a Fan:OnOff object, the fan will only turn on when there is
> a zone load to be met. And if the fan is not on, you will not get any
> outside air. Try changing your fan to Fan:ConstantVolume.
>
> AvailabilityManager:NightCycle,
> 118129 AHU Availability, !- Name
> HVACTemplate-Always 0, !-
> Applicability Schedule Name
> HVACTemplate-Always 0, !- Fan
> Schedule Name
> StayOff, !- Control Type
>
> Schedule:Compact,
> HVACTemplate-Always 0, !- Name
> HVACTemplate Any Number, !- Type
> Through: 12/31, !- Field
> For: AllDays, !- Field
> Until: 24:00, !- Field
> 0; !- Field
>
>
> On 10/15/2010 11:50 AM, jeannieboef wrote:
> >
> > I'll take it out and see what happens, thanks. But I'm still expecting
> > a constant all night Min ODA rate. I tried to take out the manager,
> > but the AirLoopHVAC expects at least 1. According to the documentation
> > though the "StayOff" is equal to a "no action", so in theory this
> > should still be okay.
> >
> > I've got 2 more things to try...then I'll report back.
> >
> > Thanks.
> >
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx
> > <mailto:EnergyPlus_Support%40yahoogroups.com>, "James V Dirkes II, PE"
> > <jim@> wrote:
> > >
> > > Dear Jean,
> > >
> > > You also have a Daylight Saving Time object in your IDF. This is
> > probably
> > > affecting your time variations.
> > >
> > >
> > >
> > > RunPeriodControl:DaylightSavingTime
> > >
> > > Similar to a special day period, a daylight saving period may be
> > entered to
> > > be applied to
> > >
> > > weather file run periods. These will always be in eff

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