blockAutomaticTwilightControlFunctionality
Extends from Interfaces.Partial.PartialFunctionality (Superclass for all functionality blocks to provide graphics).
Information
Overview
Block that implements functionality of "Automatic twilight control" from VDI 3813 [1, section 6.5.13, p. 51 - 53].
Functional Description
"The function Automatic twilight control (RA-FL section 6, column 12; informative function block Figure 34) allows sunshading equipment to be positioned in accordance with outdoor brightness. For instance, it allows the closing of the sunshade during night hours in order to, reduce cooling down via the windows or reduce light emission by the building. To this end, the application function processes the input information about the illuminance outside the building, originating from the sensor function Brightness measurement, and generates actuating information for assigned actuator functions of the type Sunshade actuator."[1, section 6.5.13, p. 51 - 53]
Fig. 1: UML activity diagram of the application function Automatic twilight control,[1, section 6.5.17, p. 59 - 61]
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Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.SIunits.Illuminance | PAR_H_ACT | 100 | Sunset threshold value of outdoor illuminance in lux for sunblind activation. |
| Modelica.SIunits.Illuminance | PAR_H_DEA | 200 | Sunrise threshold value of outdoor illuminance in lux for sunblind deactivation. |
| Modelica.SIunits.Time | PAR_TI | 300 | Hysteresis time for twilight recognition in seconds. |
| Real | PAR_S_ACT | {1, 0} | Setpoints for sun shade position and slat angle (in percent and degree) when sunset detected. |
| Real | PAR_S_DEA | {0, 30} | Setpoints for sun shade position and slat angle (in percent and degree) when sunrise detected. |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| BuildingControlLib.BuildingControl.VDI3813.Interfaces.BooleanInput | B_ON | Command to switch the function on or off (true == on / false == off). | |
| BuildingControlLib.BuildingControl.VDI3813.Interfaces.RealInput | H_OUT | Measured outdoor illuminance in lux. | |
| BuildingControlLib.BuildingControl.VDI3813.Interfaces.RealOutput | S_AUTO | New sunshade position. |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.StateGraph.InitialStep | s0 | ||
| Modelica.StateGraph.StateGraphRoot | stateGraphRoot | ||
| Modelica.StateGraph.Transition | t0 | ||
| Modelica.Blocks.Math.MultiSum | sunshadePosition | ||
| Modelica.Blocks.Math.MultiSum | slatAngle | ||
| Modelica.StateGraph.Transition | t1 | ||
| Modelica.StateGraph.Transition | t2 | ||
| Modelica.StateGraph.Transition | t3 | ||
| Modelica.StateGraph.Transition | t7 | ||
| Modelica.StateGraph.Transition | t6 | ||
| Modelica.StateGraph.StepWithSignal | Idle | ||
| Modelica.StateGraph.StepWithSignal | Deactivated | ||
| Modelica.StateGraph.StepWithSignal | Activated | ||
| sunShadeUtility | posIdle | ||
| sunShadeUtility | posDeactivated | ||
| sunShadeUtility | posActivated | ||
| sunShadeUtility | angDeactivated | ||
| sunShadeUtility | angActivated | ||
| sunShadeUtility | angIdle |
Revisions
- March 07, 2017 by Georg Ferdinand Schneider & Georg Ambrosius Peßler:
Implemented.