Einstein’s 1930s Eco-Friendly, Electric-Free Refrigerator is Making a Comeback
Malcolm McCulloch, an electrical engineer at Oxford, has completed a prototype of a refrigerator designed by Albert Einstein. This refrigerator does not use Freon, a toxic greenhouse gas worse than carbon dioxide, or electricity. The Einstein fridge was patented in 1930, uses pressurized gases (ammonia, butane, and water) to keep food cool, and contains no moving parts.
Via: The Guardian
This is one of several absorbtion-cycle refrigerators. A similar scheme, using ammonia, water and hydrogen and powered by a gas flame, was used in refrigerators and even a few room air conditioners until the mid-1950’s. Freon replaced ammonia because it is neither flammable nor toxic.
this is something great and necessary 4 us at this point of time in which the resources r getting depleted!!!!!!