New PDF release: Advances in Cryogenic Engineering: Proceedings of the 1956

By W. E. Gifford (auth.), K. D. Timmerhaus (eds.)

ISBN-10: 1468431021

ISBN-13: 9781468431025

ISBN-10: 1468431048

ISBN-13: 9781468431049

The nationwide Bureau of criteria Boulder Laboratories used to be on September 5-7, 1956 back host to a countrywide convention on cryogenic engineering. Supported financially by means of a few of the major business businesses presently energetic during this quickly increasing box, the convention, moment of its style, attracted greater than four hundred scientists and engineers from all elements of the area. This attendance used to be proof of the current curiosity and progress in cryogenic engineering, a box which has as but now not stumbled on a passable position in the bounds of latest expert societies. In all yet circumstances the lawsuits comprise the precis or whole textual content of the paper awarded on the confer­ ence. Forty-nine papers have been awarded at seven separate periods. those classes have been divided into the next common subject matters: Cryogenic approaches Cryogenic gear Cryogenic homes Cryogenic functions Bubble Chambers The department every now and then needed to be slightly arbitrary when you consider that a number of papers might have been labeled less than multiple common subject. To make the court cases extra helpful to the reader, an try out used to be made to list the overall dialogue which each one paper. regrettably, even if, the recording units weren't delicate adequate for transparent replica. The discussions, consequently, haven't been incorporated within the continue­ ings.

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Extra resources for Advances in Cryogenic Engineering: Proceedings of the 1956 Cryogenic Engineering Conference National Bureau of Standards Boulder, Colorado September 5–7 1956

Sample text

It consists of a finned conde~ser surrounded by liquid hydrogen, a boiler, and one plate. At the top is a plastic window through which the plate can be visually observed. Sample taps above and below the plate lead to a thermal conductivity cell for automatic recording of the hydrogen-deuterium content. A plastic liner is fitted inside the neck of the column to reduce the separation due to the wetted wall effect. The vapor-liquid behavior on various types of plates was observed in this column. During many of the early experiments, it was observed that the column would flood, that is.

25% Para Feed. Pho .. 6 15 PSIG :i ~ ::; ... ~ Z .... 0 IX ~ .. " TEMPERATURE, oK Figure 4. -17- • 1100 C a total of 31 times over a period of 6 weeks. The total time in use for conversion was 137 hours and the total time of activation was 820 hours. The activity remained essentially constant throughout, being actually a little higher at the end than at the beginning of the test. -18- A-4 A NEW ARRANGEMENT FOR THE ORTHO-PARA CONVERSION OF LIQUID HYDROGEN IN THE LARGE CEL-NBS LIQUEFIER V. J. Johnson CEL Natio nal Bureau of Standards Boulder, Colorado Introduction The tremendous increase in efficiency of the iron hydroxide catalyst described in the preceding paper (A-3) made it extremely attractive for use in the large CEL-NBS hydrogen liquefiers.

3Newman, R. , Binary-Mixtures of HZ' HD, and D2' Ph. D. thesis, University of Bristol (1954) -41- This figure shows plate efficiency as a function of the throughput which is expressed both as heat to the boiler and the corresponding approximate vapor velocity. Due to end effects within the column, some of the efficiencies shown are greater than 100 per cent and probably all the values are higher than the true plate efficiency because the boiler and condenser provide additional wetted surfaces which contribute to the separation.

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Advances in Cryogenic Engineering: Proceedings of the 1956 Cryogenic Engineering Conference National Bureau of Standards Boulder, Colorado September 5–7 1956 by W. E. Gifford (auth.), K. D. Timmerhaus (eds.)

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