Eco Factor: Self-powered fridge for use in rural areas of the world.
Emily Cummins, a 23-year-old British inventor, has become the only female to be honored by Nobel Prize winners in an international ceremony. Emily, a Leeds University Graduate, was named among the 10 most outstanding young people in the world and is receiving honors for a couple of inventions that includes a solar-powered fridge and a water carrying device that have been designed to be used in Africa.
The solar-powered fridge, which was designed by Emily in school, works on the principles of evaporation. The system features two cylinders – one inside the other. The inner cylinder is made from metal but the outer one can be made from wood or plastic. The gap between the inner and the outer cylinders is filled with a material such as sand or soil, which can be soaked with water. The outer cylinder has holes drilled in the side, which allow the sun’s rays to heat the wet material causing water to evaporate.
As water evaporates heat is removed from the inner cylinder, keeping the contents at a cool temperature of 6 degrees Celsius. Re-soaking the material with water will keep the fridge working.
Via: DailyMail
