modelMV_AirThroughScreen
Vapour mass flow exchanged from the greenhouse main air zone (below the thermal screen) to the top air zone (above the screen)
Extends from Greenhouses.Interfaces.Vapour.Element1D (Partial water mass transfer element with two WaterMassPort connectors that does not store energy).
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.Area | A | floor surface | |
| Boolean | input_f_AirTop | true | True if input the exchange rate, False to compute it in this model |
| Real | f_AirTop | 0 | Air exchange rate computed in model AirThroughScreen |
| Modelica.Units.SI.Length | W | length of the screen when closed (SC=1) | |
| Real | K | Screen flow coefficient (check values in Info) |
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 | |
| Real | SC | 0 | Screen closure 1:closed, 0:open |
| Modelica.Units.SI.Temperature | T_a | 300 | Temperature at port a (filled square) |
| Modelica.Units.SI.Temperature | T_b | 300 | Temperature at port b (empty square) |
| Real | f_AirTopp | ||
| Modelica.Units.SI.Density | rho_air | ||
| Modelica.Units.SI.Density | rho_mean | ||
| Modelica.Units.SI.Density | rho_top | ||
| Modelica.Units.SI.SpecificHeatCapacity | c_p_air | 1005 | |
| Real | R | 8314 | gas constant |
| Modelica.Units.SI.MolarMass | M_H | 18 | |
| Modelica.Units.SI.TemperatureDifference | dT | ||
| Real | VEC_AirTop | Mass transfer coefficient |