Solar Cooker
We made a small demonstration solar cooker which can cook roughly half-a-kilogram of rice in three hours. I can collect some 200 watts of energy. We have demonstrated it several times to our children. A bigger one is being planned. Here are some images.
This is according to the design given in the internet by the name Parvathi solar cooker.
It is pasted with alluminium foil in the inside.
A lunch box with a coat of light absorbent black paint is packed in polythene cover. It contains rice and water.
Around noon the cooker works well.
One more model is made by using GI sheet.