The second block provides all the needed illuminances for the controllers and provides
also the solar altitude and solar azimuth relative to the facade. Its inputs are the time and
the global horizontal radiation. Furthermore, four parameters are needed for the block
calculations. The longitude
, the latitude , the time zone Tz of the building location and
the facade orientation a0.
The calculations are not detailed here to avoid a rather long description. Their principle is
very well known and can be found in any good textbook on solar energy. Moreover, they
can be find in the PhD thesis of Antoine Guillemin [...].
2.2 Controllers
Three controllers are considered in this work: a shading device controller, an electric
lighting controller and a heating controller. Each one is integrated in the whole system
via the nested loops architecture (see Section 2.1). The present section deals only with
the level 2 of the different controllers.
Figure 2.3: Overall diagram of the blinds controller operation
2.2.1 Shading Device
The shading device control system described here deals only with fabric blinds, since the
available blinds in the LESO building are of this type. Nevertheless, a controller for
venetian blinds was developed in another project (with both vertical position of the blind
and slats angle regulated).
In this section, the fabric blind control system is presented: first the controller for the
case where the user is present, and then the controller for the case where the user is
absent.
2.2.1.1 User Present
From the preliminary study, the main criteria of a blind controller in the visual case have
been established:
1
Priority is to avoid glare.
2
Thermal aspects should also be considered.
Summary :
2.2 Controllers Three controllers are considered in this work: a shading device controller, an electric lighting controller and a heating controller. In this section, the fabric blind control system is presented: first the controller for the case where the user is present, and then the controller for the case where the user is absent.
Tags :
controller,blinds,controllers,present,system,user,solar,blind,case,shading,section,deice,calculations