The value in the schedule is applied to the object referencing the
schedule for the timestep. In the below example, the ZoneInfiltration
object specifies that I have 0.06 cfm / ft2 of exterior wall area as a
nominal infiltration rate. So for each timestep during the simulation,
it checks the referenced schedule "INFIL_SCH" and multiplies the nominal
infiltration rate by the scheduled value. This is relevant in
infiltration as the infiltration will typically be reduced when the HVAC
system is operating due to the thermal zones being positively
pressurized. According to the following example, the infiltration rate
on sunday at 3 am will be:
1.0 * 0.06 cfm /ft2 of exterior wall area. The infiltration rate on
tuesday at 2 pm will be 0.25 * 0.06 cfm / ft2 = 0.015 cfm / ft2 of
exterior wall area
Hope this helps.
Jason
ZoneInfiltration:DesignFlowRate,
AllZones Infiltration, !- Name
AllZones, !- Zone or ZoneList Name
INFIL_SCH, !- Schedule Name
Flow/ExteriorWallArea, !- Design Flow Rate Calculation Method
, !- Design Flow Rate {m3/s}
, !- Flow per Zone Floor Area {m3/s-m2}
0.0003048, !- Flow per Exterior Surface Area {m3/s-m2}
, !- Air Changes per Hour
1.0, !- Constant Term Coefficient
0.0, !- Temperature Term Coefficient
0.0, !- Velocity Term Coefficient
0.0; !- Velocity Squared Term Coefficient
Schedule:Compact,
INFIL_SCH, !- Name
Any Number, !- Schedule Type Limits Name
Through: 12/31, !- Field 1
For: Weekdays SummerDesignDay, !- Field 2
Until: 06:00,1.0, !- Field 3
Until: 22:00,0.25, !- Field 5
Until: 24:00,1.0, !- Field 7
For: Saturday WinterDesignDay, !- Field 9
Until: 06:00,1.0, !- Field 10
Until: 18:00,0.25, !- Field 12
Until: 24:00,1.0, !- Field 14
For: Sunday Holidays AllOtherDays, !- Field 16
Until: 24:00,1.0; !- Field 17