Solar cookers

Slow cookers

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Solar cookers are cookers which rely on sunlight and simple yet effective design to heat food. They have been described as "win-win technology," especially for their use in sunny places where fuel is exceptionally scarce. Because solar cookers do not require electricity, they do not encourage deforestation. As a result, many humanitarian efforts promote their use.

There are a variety of solar cookers available, but they all make use of the same basic principles. The ways in which they heat food and water include:

•Converting light from the sun into heat - Slow cookers utilize dark, shallow, thin metal pots for effective heating purposes. •Concentrating sunlight - This is accomplished with mirrors or reflective material. •Trapping/Retaining heat - The dark pot is placed in a transparent bag, bowl, or box so that the light may enter but heat is trapped.

Types of solar cookers can generally be categorized into three groups:

•Box cookers - These cook at moderate to high temperatures. They can handle many pots at a time. •Panel cookers - These cook at low to moderate temperatures. They are easy to produce and relatively inexpensive. •Parabolic/Curved cookers - These cook at high temperatures and do so very quickly. These are particularly effective for largescale, institutional cooking, but require much supervision.