By Kim Robson:
Indian entrepreneur has created a refrigerator that keeps food cool
without using any electricity. The Gujarat-based potter makes his natural MittiCool refrigerator entirely
from clay. It provides an electricity-free food storage alternative for people in rural areas who can’t
afford conventional refrigerators or anyone who lives off the grid.
The uses the natural cooling effect of water evaporation. It can keep vegetables fresh for up to a week and store milk for three days before it spoils. Water from the upper chambers drips down the side of the clay fridge, stripping away heat as it evaporates, leaving the lower chambers cool — a difference of up to 8 degrees Celsius from the ambient room temperature.
The water stored in the upper chamber can be used for drinking via a small tap on the front lower end of the chamber. Two shelves in the lower chamber are used for storing food: the first is used for vegetables and fruits, while the second shelf can be used for storing milk.
MittiCool has been enjoying media attention in India:
This affordable green appliance is available for between 2,500 and 3,500 rupees, the equivalent of $37 to $52 U.S. dollars. Unlike many conventional models that run on electricity, the MittiCool fridge’s clay environment is said to preserve the original taste of fruits and vegetables. It requires very little maintenance.
Prajapati’s pottery studio makes a , including a that requires no electricity and produces up to ten liters of clean, cold drinking water. Unlike the we discussed a few weeks ago, this water filter doesn’t require salt water or sunlight to work.