Twisted rope systems could be the centerpiece of a new generation of refrigerators

A team of researchers from the University of Texas (USA) led by Ray Bowman studied the prospects for "elastocaloric cooling". This phenomenon has been known since the 19th century, when the widespread use of rubber began. Scientists realized that tension is formed in the stretched rubber band, which causes it to heat up, but if it is released, the rubber will quickly cool down. Bogman suggested strengthening the process to create a new type of refrigerator.

Obviously, the higher the voltage, the higher the heat transfer, so the scientists not only stretched the rubber fibers, but also twisted them additionally. So much so that they got "super-twisted" or "twistocaloristic" designs. The term "twist" just means "twisting". Rapid twisting followed by releasing gave a cooling of the material surface by 16.4 ° C.

Twistocaloristic cooling works great and when using line or nickel-titanium wire, the cooling reaches 5, 1 ° C and 17 ° C, respectively. The next logical step was to join several fibers into a single whole, and such a structure of four pre-twisted wire bundles cooled down by 20.8 ° C during tempering. When placed inside a container with water, it cooled it by 7, 7 ° C - there is the possibility of transferring energy and creating a refrigerator.

So far, this is an experimental technology, and there is no talk of creating real twistocaloristic systems. But it has interesting prospects - for example, the possibility of developing purely mechanical cryogrenades. At the plant, beams made of innovative materials are twisted to the limit, a check-controller is placed on the structure, when pulled out, unwinding begins with instant cooling of the environment. Such simple and reusable devices could be widely used, for example, in extinguishing fires - they can simply be thrown into a fire from a multicopter.