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

[EnergyPlus_Support] AFN - Nat Vent Too much during cold / warm days

hi All, I'm seeing large air change rates (10-20 ACH) when the outdoor temp is at 7 degC and indoor temp is at 21 degC. The "Zone" level control is set for dT of 5 degC and the "surface" level control is set for "constant". See below...please advise.

  AirflowNetwork:MultiZone:Zone,
    118129,                  !- Zone Name
    Temperature,             !- Ventilation Control Mode
    20001,                   !- Ventilation Control Zone Temperature Setpoint Schedule Name
    0,                       !- Minimum Venting Open Factor {dimensionless}
    0,                        !- Indoor and Outdoor Temperature Difference Lower Limit For Maximum Venting Open Factor {deltaC}
    5,                       !- Indoor and Outdoor Temperature Difference Upper Limit for Minimun Venting Open Factor {deltaC}
    ,                        !- Indoor and Outdoor Enthalpy Difference Lower Limit For Maximum Venting Open Factor {deltaJ/kg}
    ,                        !- Indoor and Outdoor Enthalpy Difference Upper Limit for Minimun Venting Open Factor {deltaJ/kg}
    12345;                   !- Venting Availability Schedule Name

AirflowNetwork:MultiZone:Surface,
    P_118129_1_0_0_0_0_0_Win,!- Surface Name
    P_118129_1_0_0_0_0_0_Win,!- Leakage Component Name
    P_118129_1_0_0_0_0_0_Win,!- External Node Name
    1,                       !- Window/Door Opening Factor, or Crack Factor {dimensionless}
    Constant,                !- Ventilation Control Mode
    20001,                   !- Ventilation Control Zone Temperature Setpoint Schedule Name
    .01,                     !- Minimum Venting Open Factor {dimensionless}
    0,                       !- Indoor and Outdoor Temperature Difference Lower Limit For Maximum Venting Open Factor {deltaC}
    15,                      !- Indoor and Outdoor Temperature Difference Upper Limit for Minimun Venting Open Factor {deltaC}
    ,                        !- Indoor and Outdoor Enthalpy Difference Lower Limit For Maximum Venting Open Factor {deltaJ/kg}
    ,                        !- Indoor and Outdoor Enthalpy Difference Upper Limit for Minimun Venting Open Factor {deltaJ/kg}
    2;                       !- Venting Availability Schedule Name



------------------------------------

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.
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/join
    (Yahoo! ID required)

<*> To change settings via email:
    EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
    EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/