Advances in Cryogenic Engineering: Proceedings of the 1956 by W. E. Gifford (auth.), K. D. Timmerhaus (eds.)

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

The nationwide Bureau of criteria Boulder Laboratories was once on September 5-7, 1956 back host to a countrywide convention on cryogenic engineering. Supported financially via a few of the top commercial organizations presently lively during this swiftly increasing box, the convention, moment of its style, attracted greater than four hundred scientists and engineers from all components of the realm. This attendance was once facts of the current curiosity and progress in cryogenic engineering, a box which has as but now not came across a passable position in the bounds of present expert societies. In all yet situations the court cases include the precis or whole textual content of the paper awarded on the confer­ ence. Forty-nine papers have been awarded at seven separate classes. those classes have been divided into the subsequent normal themes: Cryogenic procedures Cryogenic apparatus Cryogenic homes Cryogenic purposes Bubble Chambers The department every now and then needed to be a little arbitrary due to the fact a number of papers might have been categorised less than multiple normal subject. To make the complaints extra important to the reader, an test was once made to list the overall dialogue which every one paper. regrettably, in spite of the fact that, the recording units weren't delicate adequate for transparent replica. The discussions, hence, haven't been incorporated within the continue­ ings.

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

Example text

In other words, if the flow of a stream is defined as positive when it runs in the process direction, and negative when countercurrent to the direction of the process, the principle of unity and continuity of aim restricts the possible processes to systems where at a given level the partial sums of molal flows are positive or zero for each individual component. The limiting case occurs when a partial sum is equal to zero, as happens when there is the same flow of a given component in the vapor and the liquid reflux streams.

Plugging" Time as a Function of Nitrogen Impurity Content -47- = Differentiating equation (3). (3) r = r (x. e e (4) dx From equation (1) ( 5) since for a constant impurity rate m 2 is fixed. The vapor pressure of a solid may be generally described by B T = A - - 3 From this relationship. we may determine the axial partial pressure gradient of component "2". =K which. on substituting dT dx ~P2 = K. and performing the total operation indicated by equation (5). yields the following expression for r as a function of x and e: Bu(A-B/T) (6) + T 2 log e x u 3Woo1ey, H.

It was doubtful that the hydrostatic head necessary to pass the hydrogen through the proposed amount of catalyst could be provided. It was this problem that precipitated the idea for the closed cycle, two-expansion valve arrangement adopted as shown in Figure I, Description In order to obtain a positive pressure to force the hydrogen -19- x (%YIELD) LIQUID PARA H2 Figure 1. New Arrangement of Expansion Valves and Catalyst Chamber in Large NBS-CEL Liquefier Figure 2. Concentric Tube Heat Exchanger -20- through the catalyst it was proposed to utilize pressure available from the Joule-Thomson expansion valve.

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