Translations:Four solaire (cuiseur type boîte)/11/en

The solar oven is a box well hermitically isolated with a transparent cover and reflective faces inside: the sun ray enter by the glass et reflect on the borders of the box to hit the dark surface of the pot. The energy of those raws is so transformed into heat, heat that is stuck in the box. To increase the received solar flux, two ears covered by aluminium are fixed on each side of the box. This permits to reflect the light on the glass which should be as perpendicular as possible to the sun raws. With the metropolitan France's latitudes, the right tilt of sun regarding to the horizon is around 60° in summer and 30° in winter. Thereby, the optimal tilt of the glass is 30° in winter and 60° in summer. The solar oven only runs thanks to the sun raws: clouds, fog and dust reduce the the radiation and thereby, therefore increase the cooking time.