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concentrated there, heats up to a high temperature and thus the process of
cooking food is being accomplished.
The reflector is made out of 24 aluminum sheets, each two opposite forming a
parabola. The surface layer of the aluminum sheets is mirror polished, therefore
having a high mirror reflectivity with respect to the solar spectrum.
The reflector is supported by a steel stand, which provides its rotation in
horizontal and vertical plane to follow the daily movement of the sun.
Relevant to the functioning of the SPC is only direct solar radiation - measured
in W/m2. That is radiation reaching the solar cooker as a beam of parallel rays
directly from the sun. The device operates only in clear weather and light
clouding. Thick clouds suspend it.
The maximum efficiency of SK-01 and every other SPC is achieved by the
simultaneous fulfillment of the following four conditions:
- clear and dry weather;
- the sun is around its climax - which occurs at noon;
- the reflector is so aimed that its axis is parallel to the sun rays;
- the reflecting surface is clean.
II. Usage requirements
The conversion of radiant energy into heat energy for the needs of the user is
carried out successfully only by observing certain requirements.
Deployment of the solar parabolic cooker
1. SPC must be placed on a stable and even basis.
2. SPC should be placed in а protected from the wind site. Owing to the large
area of the reflector, the pressure of the wind on it could be significant. If no
protected area is available, further strengthening is necessary
One way to do
.
that is at least 3 sandbags, each 20 kg, placed so as to ensure the stand and to
prevent rotation and twisting of the reflector by the wind. Another way is
rivetting to a concrete base.
3
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