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    Home » Rubber Bands, the Key to a New Cooling Technology
    Science

    Rubber Bands, the Key to a New Cooling Technology

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    Rubber Bands, the Key to a New Cooling Technology
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    Although fashionable fridges now function digital screens and Internet connections, their underlying expertise has remained fairly comparable to that of their ancestors, invented again in 1834. They nonetheless make use of the compression of gases, which produces chilly. Now, nevertheless, a group of researchers from the University of Nankai in Tianjin (China) has made progress in a new expertise that would effectively change refrigeration methods radically and, alongside the manner, scale back the use of greenhouse gases. It relies on the elastocaloric impact, very noticeable if we stretch an elastic band and convey it shut to our lips: the band will heat up after which calm down as soon as it’s launched. Their method, nevertheless, can be primarily based on twisting the materials moreover stretching it to increase the refrigerating impact. Enter the twistocaloric impact.




    The engineers behind the experiment determined to take a look at the properties of a number of supplies resembling rubber, nylon, polyethylene or nickel-titanium wires. In their stretching and twisting checks, they obtained will increase in temperature of up to 15C and a comparable lower when the materials returned to their authentic situation. According to the researchers, the effectivity of this refrigeration method is comparable to typical methods, whereas it offers double the energy of a fundamental stretching system.       

    Following the preliminary checks of this expertise experiment, they developed a micro-fridge the measurement of a ballpoint pen cartridge and powered by nickel-cadmium wires. They cooled a small quantity of water by 8oC in a matter of seconds.

    One of the components which have hindered the growth of elastocaloric refrigeration methods in the previous has been the ample house they want to function. For occasion, to receive important cooling from a rubber band, it have to be stretched to up to seven occasions its authentic measurement. The twistocaloric expertise, however, is rather more compact, as the system can stretch and twist the materials utilizing half of the house.

    The pioneers in the purposes of the elastocaloric impact

    A staff from the Technical University of Denmark was considered one of the first to work on the purposes of the elastocaloric impact utilizing nickel-cadmium wires. The engineers had been exploring magnetocaloric cooling for a number of years, a expertise that works by modifying the magnetic fields of sure supplies earlier than they began learning the potential of the elastocaloric impact as a extra environment friendly different. It was they who got here up with the alloy utilized by the researchers which have found the twistcaloric impact.   

    Besides permitting the growth of extra environment friendly fridges, considered one of the targets of the Danish researchers was to create a system ready to work no matter gravity. Thus, it might have purposes in thermal management of methods in outer house. In any case, the most vital problem of this expertise undertaking proper now could be overcoming an impact often called materials fatigue, which is the put on and tear of supplies uncovered to stretching and twisting.     

    Source: Science Mag, Science Daily

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