Store vegetables in sand for monthsĬan you get your hands on some sand? If so, you can store root vegetables for months. The Wakati device is currently being tested, but it could offer a cool use of solar technology in countries where fridges may be scarce but sun is abundant. A ventilator turns the water into humidity, keeping produce cool inside a tent that can hold about 440 pounds of food. Wakati solves this problem: using a liter of water per week and solar power, produce can be preserved so more food reaches more people, and farmers earn more money.
In developing countries, about 45 per cent of produce goes bad before the farmers can ever get it to market. Wakati preserves fruit and vegetables using solar power
The MittiCool could possibly the simplest appliance you ever own: there’s basically no maintenance. The upper chamber holds water, which drips along the sides and evaporates, and can also be accessed via a tap so users can drink the water. There’s a shelf large enough for milk, which will keep for three days in the MittiCool, or space for fruit and vegetables, which will last for about a week. This homey refrigerator is made completely of clay and requires no energy, keeping food cool using evaporation. The MittiCool was originally designed by potter Mansukhbhai Raghavbhai Prajapati for use by people in rural areas. MittiCool Refrigerator uses clay and evaporation
