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Re: [EnergyPlus_Support] Geometry



At 09:59 AM 7/25/02, you wrote:
I want to know what is suppose to be inserted in the
Surface:HeatTransferSub-OutsideFaceEnvironmentObject.Is the surface of the
other zone or the name in the UserSuplliedSurfaceName??

Excerpt from the InputOutputReference for HeatTransfer surfaces:
Field: Outside Face Environment
This value can be one of several things depending on the actual kind of surface. 
1)      OtherZoneSurface  if this surface is an internal surface, then this is the choice. The value will either be a surface in the base zone or a surface in another zone. The heat balance between two zones can be accurately simulated by specifying a surface in an adjacent zone.  EnergyPlus will simulate a group of zones simultaneously and will include the heat transfer between zones.  However, as this increases the complexity of the calculations, it is not necessary to specify the other zone unless the two zones will have a significant temperature difference.  If the two zones will not be very different (temperature wise), then the surface should use itself  as the outside environment.  In either case, the surface name on the ?outside? of this surface is placed in the next field.
2)      ExteriorEnvironment  if this surface is exposed to outside temperature conditions, then this is the choice.  See Sun Exposure and Wind Exposure below for further specifications on this kind of surface.
3)      Ground  if this surface is exposed to the ground, then this is the choice.  The temperature on the outside of this surface will be the Ground Temperature.
4)      OtherSideCoeff  if this surface has a custom, user specified temperature or other parameters (See OtherSideCoefficient specification), then this is the choice.  The outside face environment will be the name of the OtherSideCoefficient specification.
Field: Outside Face Environment Object
If neither OtherZoneSurface or OtherSideCoeff are specified for the Outside Face Environment (previous field), then this field should be left blank.
As stated above, if the Outside Face Environment is ?OtherZoneSurface?, then this field?s value must be the surface name whose inside face temperature will be forced on the outside face of the base surface.  This permits heat exchange between adjacent zones (interzone heat transfer) when multiple zones are simulated, but can also be used to simulate middle zone behavior without modeling the adjacent zones. This is done by specifying a surface within the zone.  For example, a middle floor zone can be modeled by making the floor the Outside Face Environment for the ceiling, and the ceiling the Outside Face Environment for the floor.  Note that zones with interzone heat transfer are not adiabatic and the internal surfaces contribute to gains or losses. Adiabatic surfaces are modeled by specifying the base surface itself in this field.
Equally, if the Outside Face Environment, is ?OtherSideCoeff?, then this field?s value must be the OtherSideCoefficient name.

And from the HeatTransfer:Sub
Field: Outside Face Environment Object
If the base surface has Outside Face Environment = OtherZone or OtherSideCoeff, then this field must also be specified for the subsurface.  Otherwise, it can be left blank.
If OutsideFaceEnvironment for the base surface is OtherZone, this field should specify the subsurface in the opposing zone that is the counterpart to this subsurface.  The constructions of the subsurface and opposing subsurface must match, except that, for multi-layer constructions, the layer order of the opposing subsurface?s construction must be the reverse of that of the subsurface.
If OutsideFaceEnvironment for the base surface is OtherSideCoeff, this field could specify the set of Other Side Coefficients for this subsurface.  If this is left blank, then the Other Side Coefficients of the base surface will be used for this subsurface.  Windows and GlassDoorsare not allowed to have Other Side Coefficients.

So, to answer your question specfically,

  If the base surface is an interzone surface (i.e. OtherZone case), then this field should be the name of the surface (HeatTransfer:Sub) in the opposing Zone.

Linda
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