• development of a −186 °c cryogenic preservation chamber based on a dual mixed-gases joule–thomson refrigeration cycle

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 604
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     first of all, a dual mixed-gases joule–thomson refrigeration system was designed, constructed and tested in this work. a minimum no-load temperature of −197.7 °c (about 75.5 k) was reached and about 110 w cooling capacities at −174 °c (about 99 k) was obtained with the mixed-gases refrigeration prototype. secondly, a cryogenic chamber for biomaterials preservation was built and tested with the similar cycle configuration, which has reached the lowest temperature of −192 °c (about 81 k) with an effective preservation volume of 80 l. a relatively fast cooling-down rate for this cryogenic chamber was obtained. specifically, it took 2.5 h to reach −180 °c, and about 5 h to reach −190 °c. the cryogenic chamber shows a good perspective as a substitute for traditionally used liquid nitrogen preservation vessels.

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