BoundaryWall¶
Floor on ground or over outdoor air: the outer surface is held at a temperature
FastSmoothBuildings.Envelope.BoundaryWall, model (source)
Extends PartialOpaque.
Purpose
Floor on the ground or over outdoor air: the conduction of
PartialOpaque with the outer surface held at a
temperature, the ground temperature TGro or, with outdoorAir = true, the outdoor dry-bulb
temperature.
Equations
The outer surface (node 1) is not a state: its temperature is set and its balance is not solved
(Q_a = 0, the heat to the ground is not computed). The other layer boundaries are states,
T[1] to T[nLay] being the boundaries 2 to nLay + 1 of the construction; the
room surface is T[nLay].
Room surface: Q_b = Qrad − Qint, with
Qrad the radiation the zone gives to the surface and Qint the convection to the
room air (interiorConvection).
On the bus: emissivity absIR_b, solar absorptance absSol_b, no transmission.
Parameters
TGro: a constant ground temperature, under the layers of the construction.
Use
The floors of Examples.TwoZones.
Parameters¶
| Parameter | Type | Unit | Default | Description |
|---|---|---|---|---|
| outdoorAir | Boolean | false | true: the outer surface at the outdoor air temperature | |
| TGro | Real | K | 283.15 | Ground temperature |
Revisions¶
- October 2026: moved from trano's
FastModel.Envelope.