modelNewsham1994BlindsSolarIntensity
A model to predict occupants' blinds behavior with solar intensity
Extends from Modelica.Blocks.Icons.DiscreteBlock (Graphical layout of discrete block component icon).
Information
Model predicting the state of the blinds with the solar intensity at the window and occupancy.
Dynamics
When the space is unoccupied, the blinds are always down. When the space is occupied, if the solar intensity is above the threshold, the blinds are up.
References
The model is documented in the paper "Newsham, G.R., 1994. Manual control of window blinds and electric lighting: implications for comfort and energy consumption. Indoor Environment, 3, pp.135-144."
The solar intensity threshold was first identified by a field study in an office building in Japan, and was utilized by Newsham for a simulation study in an office building in Toronto.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | HSet | 233 | Threshold for moving blinds up or down |
| Modelica.Units.SI.Time | samplePeriod | 120 | Sample period |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | H | Solar intensity at the room-side of the window | |
| Modelica.Blocks.Interfaces.BooleanInput | occ | Indoor occupancy, true for occupied | |
| Modelica.Blocks.Interfaces.RealOutput | blindState | State of blinds, 1 being blinds down |
Revisions
-
December 6, 2024, by Michael Wetter:
Refactored implementation of random number calculations, transfering the local state of the random number generator from one call to the next.
This is for #4069. -
July 24, 2018, by Zhe Wang:
First implementation. -
August 31, 2018, by Zhe Wang:
First Revision.