[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [EnergyPlus_Support] define schedule compact for infiltration to reach convergence results





Mohammed,

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



__._,_.___


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.




Your email settings: Individual Email|Traditional
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

__,_._,___