1. A follower system without
any engine!
This system uses only physics properties for the rotation of the
solar cells. It follows only the azimuth of the sun (see calculation Gnomon is a simplified version of a sun
dial: a sharp rod is fixed on a normal
poster). It uses dilation and gravity. This system does not use any
base, and the evolution of its shadow
other energy.
permit us to follow sun’s path. In order to
have a reliable experiment, the gnomon
must be stable during all the
observations.
In order to avoid than the operator
comes to take bearings of its shadow; and
quote the hour, we use a webcam and
make a picture of the gnomon area every With this picture from the
minute. webcam we can reckon the
More info on the Web site: The gnomon is normal to the base, one of height and the azimuth.
Write: “sunfollower” in a search engine and you find us… its axes is oriented North-South with a
http://tinyurl.com/4tngtw compass. The base is positioned on
horizontal line with a level square and
Contact: philippe.jeanjacquot@gmail.com three screws.

2. Our first prototype P is a fixed value of the sun power, received before atmosphere
per square meter. We choose P=1kW/m²
with a polar rotating h is the height of the Sun (see gnomon)
A is the azimuth of the Sun (see gnomon)
axis m is the coefficient of the atmosphere thickness (the same than
in astronomy. m=1/sin h
E0 is the energy received by the following modules E0=P x t/m with E0 in kWh/m², P in kW/m² et t in h.
Rotation Comparison E1 is the energy received by fixed module with a slope of 45° to the south: E1= E0 SIN(45+h) COS(A)
according to between the E2 is the energy received by following module tracking only the azimuth, his slope is 45° E2= E0 SIN(45+h)
the days fixed and the
following solar
Rotation module (During
according to a sunny Day in
the hours November
2007)
Latitude
setting
This testing ground is used
to measure the power
produced by the solar cells
according to the angle
between the sun rays and
the cells.