A photo from open sources
When I read about such discoveries and inventions, then first I admire all, and secondly … But more on that at the end of the article, but for now let’s, as we say in Russia, closer to the body (although, probably, closer to the topic).
So, a group of German researchers from the University of Saarland (Saarland University) has created an unusual heating-cooling system, which, when used in refrigeration units, can, like at least be three times more effective than modern ones devices, not to mention its other advantages.
Speaking in a somewhat simplified language, the essence of this refrigerant generator is in a rotating cylinder, on which wound nitinol wire, which is in one direction of rotation stretches, and in another – is compressed. Nitinol (unique alloy) capable of absorbing heat upon expansion, and upon returning to the starting position is to give. As experiments have shown, the difference temperatures in this case can reach, even at a minimum value, 20 degrees.
A photo from open sources
Here is what one of the co-authors of this invention says about it. Professor Stefan Seeleke:
We were able to calculate the diameter and size of nitinol wire, drum speed, air flow parameters from a fan and so on, as a result of which we have reached not only an impressive temperature drop of 20 degrees Celsius, but also system power 30 times the effort required to work this installation. This is three times more effective than a modern refrigerator. But in principle, in the future, when creating industrial units indicators of this type can be improved several times. TO Moreover, such a refrigerator does not consume toxic substances (environmentally friendly), does not require pressurized pipes, heat exchangers and other intermediate links.
There is only one very important question: if nitinol the wire will constantly expand and contract again, as far as is it enough? But it turns out that this alloy is different from many others. its fantastic fatigue resistance, why nitinol, to for example, used in arterial stents, which allows such an implant shrink, twist, stretch and so on along with the blood vessel while moving human body. In addition, this metal is relatively cheap, which together with countless expansion-compression cycles makes it optimal for the cooling system in question.
A photo from open sources
Great, isn’t it? And secondly, I always I wonder why such inventions, sometimes even done a lot of noise in the media and the Internet, then just disappear from sight journalists, scientists, and indeed? Strange …
I’ll only add about this (maybe at least this information will serve as some explanation) that the term “refrigerator” was coined in 1800 by the famous Irish poet Thomas Moore, who proposed to overlay the ice box with rabbit fur, thereby isolating it from outer space. A real refrigeration created on the principle of para-compression, created in 1805 American Oliver Evans. The very first refrigerator with using a compressor (this is how modern unit) was offered to society in 1841 by US physician John Gorrie. But before mass production and use of refrigerators was required a whole century …
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