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It must be remembered that no reinforcement can protect SPC from stormy
winds.
Material of the cooking vessel
Cooking vessels should be metallic. The high thermal conductivity of metals
allows to heat up the entire vessel, although the focused light falls only on part
of it. Plastic pots are not allowed.
All vessel parts should be metallic, including handles. Plastic handles are
unsuitable as concentrated rays may melt them.
In SPC could be used any traditional metal cooking vessels that are being sold
everywhere. It is advisable to be thick-walled with thermo-bottom. Also could
be used thin-walled enameled pots, in which case it must be remembered that
there is a risk of burning and scorching and special attention during cooking
process is needed - stirring the food or shifting the pot from focus.
Color of the cooking vessel
Unlike the conventional cooking apparatuses, in SPC the vessel color influences
the duration of the cooking process.
Vessels are recommendably painted black outside, in order to absorb more
solar energy. The vessel painting inside is not relevant. If black vessels are not
available, standard oven spray blacking could be used for that purpose.
Focusing
Focusing of a SPC means targeting the reflector to the sun in such a way that the
axis of the reflector is parallel to the direct sunlight. When this is fulfilled, the
bright spot of the focus falls within the supporting grid area.
Focusing of SK-01 is performed using a directional pin (DP). DP is mounted
4
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