modelMV_ventilation
Vapour mass flow exchanged from the greenhouse air to the outside air by ventilation
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 | |
| Modelica.Units.SI.Angle | phi | 25/180*Modelica.Constants.pi | inclination of the roof (0 if horizontal, 25 for typical cover) |
| Real | fr_window | 0.078 | number of windows per m2 greenhouse |
| Modelica.Units.SI.Length | l | length of the window | |
| Modelica.Units.SI.Length | h | width of the window | |
| Boolean | thermalScreen | false | presence of a thermal screen in the greenhouse |
| Boolean | topAir | false | False for: Main air zone; True for: Top air zone |
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.Angle | theta_l | 0 | window opening at the leeside side |
| Modelica.Units.SI.Angle | theta_w | 0 | window opening at the windward side |
| 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) |
| Modelica.Units.SI.Velocity | u | 0 | Wind speed |
| Real | f_vent | ||
| Real | R | 8314 | gas constant |
| Modelica.Units.SI.MolarMass | M_H | 18 | kg/kmol |
| HeatAndVapourTransfer.VentilationRates.NaturalVentilationRate_1 | airExchangeRate |