By F. G. Brickwedde (auth.), K. D. Timmerhaus (eds.)
More than sixty years have elapsed given that Linde first liquefied air on a advertisement scale and ready the best way for keeping apart of alternative gaseous combos. His paintings, in spite of the fact that, was once now not of an remoted nature. It used to be conceived eighteen years after air had, for the 1st time, been liquefied within the laboratory by way of Pictet in Geneva and Caillete in Paris. Linde's liquefaction of air used to be by means of Dewar's paintings on hydrogen liquefaction in London and by way of the developing at Leiden of Kamerlingh Onnes's well-known low temperature laboratory. those advances in low temperature or cryogenic know-how have ended in the institution of a totally new and thriving undefined. Cryogenic engineering is worried with constructing and enhancing low temperature procedures, innovations, and gear; deciding upon the actual houses of structural and comparable fabrics utilized in generating, protecting, and utilizing low temperatures; and the sensible program of low temperature concepts and techniques. those low tempera tures are less than these often encountered in refrigerating engineering. it is extremely tough to assign a distinct temperature which serves to divide refrigerating engineering from cryogenic engineering. A temperature under _lSOoC, despite the fact that, is usually linked to cryogenic engineering.
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Additional info for Advances in Cryogenic Engineering: Proceedings of the 1954 Cryogenic Engineering Conference National Bureau of Standards Boulder, Colorado September 8–10 1954
A new panel, complete and ready for use, is attached to the tank and jacket assembly by connecting the flanged couplings and plugging the vacuum tube into the socket. All the gauges are of a direct indicating type. Every effort was made to have the liquid level gauge indicate immediately the amount of liquid in the tank. By using a differential pressure type gauge, coupled with a surge tank, this was accomplished. A standard pressure gauge indicates internal tank pressure. The vacuum, or pressure in the annular space, is measured using a thermocouple type gauge.
Aluminum foil set to rupture at 90 psig is used for the rupture discs. In addition to these devices, a safety factor was used when selecting the proper gauge of aluminum for the 50 psig working pressure. The inner tank has a design pres sure of 180 psig. twice that of the rupture discs. Aluminum is used because it remains ductile at the low temperatures and withstands the thermal shock. The suspension of the tank also is designed to withstand the thermal shock and the rigors of transport. The aluminum dewar can be built to any size.
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