net.simplace.sim.components.vapourpressure.fao56.VapourPressureFromPsychrometricData
Calculates vapour pressure from psychrometric data by (FAO 56) method.
Needs dry and wet bulb temperature as input.
Additionally altitude and psychrometric constant of the instrument have to be
specified if they differ from the default values (default altitude =0, default
psychrometric constant = 0.00080
For documentation of the formulas please check the orginal reference (FAO 56)
References
(FAO 56): Allen, Crop evapotranspiration - Guidelines for computing crop water requirements - FAO Irrigation and drainage paper 56, 1998
Component Variables
| Content Type | Name | Description | Data Type | Unit | Min Value | Max Value | Default Value |
|---|
| constant | cAltitude | elevation above sea level | DOUBLE | m | - | - | 0.0 |
| constant | cPsychrometricConstantInstrument | psychrometric constant of instrument | DOUBLE | 1 | - | - | 8.0E-4 |
| input | iTDryBulb | dry bulb temperature | DOUBLE | °C | - | - | 0.0 |
| input | iTWetBulb | wet bulb temperature | DOUBLE | °C | - | - | 0.0 |
| out | ActualVapourPressure | actual vapour pressure | DOUBLE | kPa | - | - | 0.0 |
public class VapourPressureFromPsychrometricData extends
net.simplace.sim.model.FWSimComponent {
// Public Constructors
public VapourPressureFromPsychrometricData();
// Public Instance Methods public HashMap createVariables(); // Defines
net.simplace.sim.model.FWSimComponent
Create the FWSimVariables as interface for this SimComponent
// Protected Instance Methods protected void init(); // Defines net.simplace.sim.model.FWSimComponent
Initializes the fields by getting input and output FWSimVariables from VarMap
protected void process(); // Defines net.simplace.sim.model.FWSimComponent
Process the algorithm and write the results back to VarMap
protected FWSimComponent clone(FWSimVarMap aVarMap);
// Defines net.simplace.sim.model.FWSimComponent
creates a clone from this SimComponent for use in other threads
}
Hierarchy: java.lang.Object - net.simplace.sim.model.FWSimComponent (net.simplace.sim.util.FWSimFieldContainer) - VapourPressureFromPsychrometricData
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