By T. M. Flynn, C. N. Smith (auth.), K. D. Timmerhaus (eds.)
1971 marked the 1st 12 months due to the fact 1956 that the yearly Cryogenic Engineering convention used to be no longer held. as a substitute, the Cryogenic Engineering convention gave its complete help to the XIII overseas Congress of Refrigeration through operating with Commissions I and II of the overseas Institute of Refrigeration to arrange the cryogenic classes for those commissions. the entire papers awarded on the overseas Congress of Refrigeration might be released through the IIR as a part of the complaints of that assembly. even if no Cryogenic Engineering convention used to be held in 1971, it grew to become particularly obvious to the convention Board that there have been enough advances in cryogenic engineering to warrant the book of quantity 17 of the Advances in Cryogenic Engineering. quantity 17 offers the advances during this vital box through bringing jointly in a single quantity the various major papers which have been awarded at a variety of technical conferences around the kingdom in the course of the latter 1/2 1970 and the 1st a part of 1971. additionally, a number of authoritative overview papers were ready via invitation of the Cryogenic Engineering convention Board.
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Additional info for Advances in Cryogenic Engineering: A Collection of Invited Papers and Contributed Papers Presented at National Technical Meetings During 1970 and 1971
The ideal or reversible work per unit mass liquefied is given by [2J - W;d/mf = TI(sl - Sf} - (hi - hf ) (I) where the subscript 1 refers to ambient conditions and subscript f refers to the saturated liquid conditions at ambient pressure. The negative sign is included because the liquefaction system requires work from an external source, and work done on a thermodynamic system is considered negative work by convention. * Paper presented at 3rd Joint Meeting of American Institute of Chemical Engineers and Instituto Mexicano de Ingenieros Quimicos, Denver, Colorado, Aug.
At high pressure, the assumption of an ideal gas can be greatly in error. especially at low temperatures. It is interesting to note that in a 100-ton-per-day oxygen plant. assuming 90 % recovery, about 432 lb of carbon dioxide would be carried into the cold box every day if none of the carbon dioxide were removed ahead of it. Even at only 1 ppm carbon dioxide in the air after a purification. thl! 37 lb per day which would cause serious plugging in a short time if deposited as a solid in some restricted space.
Hampson's contribution to the basic Linde liquefaction system was the development of a much more effective heat exchanger than the one originally used by Linde. When the Hampson heat exchanger was combined with the Linde cycle, a liquefier was produced which provided liquid within a short time after being started. A schematic of the basic Linde-Hampson system is shown in Fig. 1. The path of the fluid on the temperature--entropy plane is shown in Fig. 2. If the first law of thermodynamics is applied to the combined heat exchanger, expansion valve, and liquid receiver, the following expression is obtained for the fraction of the gas flow which is liquefied (the liquid yield): rilJ h'1 - hz Y = ril = h'1 - hJ (2) where the subscripts refer to the points given in Fig.
Advances in Cryogenic Engineering: A Collection of Invited Papers and Contributed Papers Presented at National Technical Meetings During 1970 and 1971 by T. M. Flynn, C. N. Smith (auth.), K. D. Timmerhaus (eds.)