Download Advances in Cryogenic Engineering: Proceedings of the 1972. by A. Pastuhov (auth.), K. D. Timmerhaus (eds.) PDF

By A. Pastuhov (auth.), K. D. Timmerhaus (eds.)

The nationwide Bureau of criteria Boulder Laboratories at Boulder, Colorado once more served because the host for the 1972 Cryogenic Engineering convention. For the Cryogenic Engineering convention it used to be like coming horne, for it was once on the NBS Boulder Laboratories that the Cryogenic Engineering convention used to be first conceived and held m 1954m reference to the commitment ofthe NBS Boulder Laboratories through President Dwight D. Eisenhower. The Cryogenic Engineering convention IS thankful for the continued aid that the nationwide Bureau of criteria has gIVen through the years, and which used to be multiplied on July 1, 1971 while the NBS Boulder Laboratories assumed the secretariat functionality of the convention from the nationwide Academy of Sciences. as a result of universal pursuits in warmth move, the 1972 Cryogemc Engineering convention labored with the thirteenth nationwide warmth move convention to boost a joint application m warmth move. A majority ofthe papers awarded during this cooperative attempt are incIuded m V olume 18 of the Advances zn Cryogenic Engineerzng during the kmd permission ofthe thirteenth nationwide warmth move convention and are acknowl­ edged accordingly.

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Read or Download Advances in Cryogenic Engineering: Proceedings of the 1972. Cryogenic Engineering Conference. National Bureau of Standards. Boulder, Colorado. August 9–11, 1972 PDF

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Additional info for Advances in Cryogenic Engineering: Proceedings of the 1972. Cryogenic Engineering Conference. National Bureau of Standards. Boulder, Colorado. August 9–11, 1972

Example text

On the other hand, an exchanger may be mechanically sound when shipped from the manufacturer but damaged dunng transit or installation. In summary, external problems wh ich may create heat exchanger malfunctlOns can be eliminated once the problem is plOpointed and the proper procedure used. INTERNAL PROBLEMS For an exchanger to function properly, it must be designed on reliable equihbrium and enthalpy data. If erroneous data are used, the exchangers cannot properly perform the Job they were designed to do.

These are installed on the primary stream only. This mvolves additional expense, but offers good insurance when operational problems develop. A typieal example of ten parallel exchangers with single-phase ftow showed a variation in outlet temperature of about 8°C. These units had not been ftow tested in the manufacturer's shop. The temperature of the combined outlet stream matched the design outlet temperature, and the heat exchanger bank met the design performance requirement. Nevertheless, the survey did indieate unequal ftow distribution even though all exchangers were Identical in size and the exchanger headers and piping symmetrically balanced.

1 turbocompression unit was equipped with microphones, pressure fluctuation detectors, and strain gages to provide for a two-month test program in the startup sequence to resolve any uncovered problem. A complete discussion of the turbocompressor characteristics and ofthe problems related to the control system ofthe compressor as required by the process and for the compressor protection was presented at the ASME Meeting in New Orleans [6] and at the Third International LNG Conference in Washington.

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