A funnel-shaped solar cooker has been developed to concentrate the energy brought by sunlight into a cooking pot or jar, and then trap the heat using the greenhouse effect. A simple system allows pressure-cooking to increase the cooking rate while releasing steam. In this way, solar fusion energy can be used for cooking and pasteurizing water. The Line Concentrated Solar Cooker will be particularly useful in sunshine-rich countries where the vast resource of the sun’s fusion energy is appreciated.

Generally in Parabolic Concentrator collectors concentrate sunlight to a point. This parabolic concentrator was first tried in the 1860’s but is difficult and expensive to build and can only cook small quantities of food. There is also a significant safety problem associated with concentrating sunlight to a point, where damage to eyesight can occur quickly. The Solar Box Cooker uses a glass plate to admit sunlight while keeping infrared radiation ("heat") effectively trapped inside the box. A pot or jar is placed inside the box, preferably a black color to absorb the sunlight. The cooking pot radiates heat mostly as infrared radiation while the glass or plastic plate on top of the box inhibits cooling by the outside air. A weakness of the solar box cooker is that sunlight is admitted only through the top window, while heat escapes from all sides of the box. Good insulation is therefore required along the sides and bottom of the box, and typically two or three nested boxes are used to improve the insulation. Cooking is also slow, typically requiring rotation of the box to follow the sun over a 1 — 3 hour period.

In order to overcome all the above mentioned problems a special device is developed called Line Concentrated Solar Cooker also known as Solar Funnel, which allows sunlight to enter from all sides except from the bottom which would substitute for the box altogether. A black jar or can inside the plastic bag would serve as the cooking vessel. By using a cone-shaped reflecting solar funnel, sunlight would be concentrated along the axis of the funnel at the bottom, where the cooking can or jar would be placed. Safety comes from the fact that the sunlight is concentrated along a line deep inside the funnel where the eyes cannot go without blocking the sun.