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ZoneVentilation:WindandStackOpenArea doens't work

asked 2025-03-01 04:26:35 -0500

OlivierC37's avatar

updated 2025-03-03 08:09:45 -0500

Hi,

In Energyplus I want to simulate air entering when a door is opened. To do this I've used ZoneVentilation:WindandStackOpenArea but it doesn't work and I don't know why. Also, does anyone know why you can't choose an existing door and the side of the building you want to simulate? Can someone please explain where I made a mistake?

ZoneVentilation:WindandStackOpenArea,
Door,                    !- Name
Zone1 ,                  !- Zone or Space Name
3.4,                     !- Opening Area {m2}
All  Activity,           !- Opening Area Fraction Schedule Name
autocalculate,           !- Opening Effectiveness {dimensionless}
0.5,                     !- Effective Angle {deg}
2.06,                    !- Height Difference {m}
autocalculate,           !- Discharge Coefficient for Opening
18,                      !- Minimum Indoor Temperature {C}
,                        !- Minimum Indoor Temperature Schedule Name
22,                      !- Maximum Indoor Temperature {C}
,                        !- Maximum Indoor Temperature Schedule Name
10,                      !- Delta Temperature {deltaC}
,                        !- Delta Temperature Schedule Name
-7,                      !- Minimum Outdoor Temperature {C}
,                        !- Minimum Outdoor Temperature Schedule Name
-2,                      !- Maximum Outdoor Temperature {C}
,                        !- Maximum Outdoor Temperature Schedule Name
10;                      !- Maximum Wind Speed {m/s}
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answered 2025-03-03 02:09:43 -0500

Please go read the Input/Output (I/O) reference guide, that'll explain what the fields are and you'll quickly realize what prevents the operation of the object: https://bigladdersoftware.com/epx/doc...

TL;DR: the Min/Max/Delta temperature are too stringent. It means it'll only operate when:

  • indoor temp is 18-22C, and,
  • there's more than 10C difference between outdoor and indoor temperature, and,
  • the OA temp is between -7C and -2C.

Example of relaxed thresholds:

 -100,                                   !- Minimum Indoor Temperature {C}
 ,                                       !- Minimum Indoor Temperature Schedule Name
 100,                                    !- Maximum Indoor Temperature {C}
 ,                                       !- Maximum Indoor Temperature Schedule Name
 -100,                                   !- Delta Temperature {deltaC}
 ,                                       !- Delta Temperature Schedule Name
 -100,                                   !- Minimum Outdoor Temperature {C}
 ,                                       !- Minimum Outdoor Temperature Schedule Name
 100,                                    !- Maximum Outdoor Temperature {C}
 ,                                       !- Maximum Outdoor Temperature Schedule Name
 40;                                     !- Maximum Wind Speed {m/s}
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Asked: 2025-03-01 04:26:35 -0500

Seen: 96 times

Last updated: Mar 03