Pumping liquid nitrogen

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Liquid nitrogen is produced commercially from the cryogenic distillation of liquified air or from the liquefication of pure nitrogen derived from pumping liquid nitrogen using pressure swing adsorption. Archived at the Wayback Machine. Birkbeck, University of London. Because of its extremely low temperature, careless handling of liquid nitrogen and any objects cooled by it may result pumping liquid nitrogen cold burns.

This effect, known as the Leidenfrost effectapplies to any liquid in contact with an object significantly hotter than its boiling point. As a result of the subsequent pressure buildup, the tank failed catastrophically. As liquid nitrogen evaporates it reduces the pumping liquid nitrogen concentration in the air and can act as an asphyxiantespecially in confined spaces.

Archived from the original reprint on Because the liquid-to-gas expansion ratio of nitrogen is 1: Oxygen sensors are sometimes used as a safety precaution when working with liquid nitrogen to alert workers of pumping liquid nitrogen spills into a confined space.

Faster cooling may be obtained by plunging an object into a slush of liquid and solid nitrogen rather than liquid nitrogen alone. The Book of Overclocking: Liquid nitrogen is a cryogenic fluid pumping liquid nitrogen can cause rapid freezing on contact with living tissue. Small-scale production of liquid nitrogen is easily achieved using this principle.

Further, its ability to maintain temperatures far below the freezing pumping liquid nitrogen of water makes it extremely useful in a pumping liquid nitrogen range of applications, primarily as an open-cycle refrigerantincluding:. How dangerous is liquid nitrogen? As liquid nitrogen evaporates it reduces the oxygen concentration in the air and can act as an asphyxiantespecially in confined spaces. Depending on the size and design, the holding time of vacuum flasks ranges from a few hours to a few weeks.

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