South Korea’s Institute of Machinery and Materials revealed that it had developed a new ultra-low temperature Stirling refrigerator using helium. General household freezers have limits if used in ultra-low temperature devices, including the coagulation of the lubricant inside the compressor leading to clogging of the fluid path. The team managed to compress the equipment for making the Stirling refrigerator along with using helium, replacing CFCs, making it an eco-friendly solution. Major applications will include cold chains for the transportation of COVID-19 vaccines, and manufacturing of semiconductors and displays.
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