modelMV_cnv_condensation
Vapour mass transfer (and possible condensation) caused by convection at a surface. The model must be connected as following: air (filled port) - surface (empty port)
Extends from Greenhouses.Interfaces.Vapour.Element1D (Partial water mass transfer element with two WaterMassPort connectors that does not store energy).
Information
Mass transfer from the air to the cover (condensation) is governed by processes at the boundary layer at this
surface. Because of the similarity of the transport mechanism for vapour and heat transfer through the boundary
layer, the mass and heat transfer coefficients are correlated. In de Zwart (1996), a factor of 6.4e-9 kg/(kJPa)
is found between the heat and mass transfer coefficients.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.Area | A | floor surface |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Greenhouses.Interfaces.Vapour.WaterMassPort_a | port_a (from Element1D) | ||
| Greenhouses.Interfaces.Vapour.WaterMassPort_b | port_b (from Element1D) |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.MassFlowRate | MV_flow (from Element1D) | Mass flow rate from port_a -> port_b | |
| Modelica.Units.SI.PressureDifference | dP (from Element1D) | port_a.VP - port_b.VP | |
| Modelica.Units.SI.CoefficientOfHeatTransfer | HEC_ab | 0 | Heat transfer coefficient between nodes a and b, provided by the adecuate model in HeatTransfer folder |
| Real | VEC_ab | Mass transfer coefficient |