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Double-tube coil heat exchangers of cryogenic helium units

  • Cryogenic Engineering, Production and Use of Industrial Gases, Refrigeration Engineering
  • Published:
Chemical and Petroleum Engineering Aims and scope

Abstract

A possible way to optimize energy indices of a unit, namely, to reduce irreversible losses in heat exchangers, has been discussed with reference to the series-made cryogenic helium unit KGU-150/4.5. The refrigeration cycle of the unit with reduced temperature differences in the heat exchangers has been calculated. Energy losses in nitrogen, expansion, and throttling stages have been analyzed. The effect of irregular flow on the heat regime of the exchanger has been examined. The investigation results for model double-tube (tube-in-tube) type of heat exchangers are cited. The heat-exchange surface of these exchangers is formed of the surface of the tubes ribbed in spiral by wire. These exchangers are highly promising for conditions of operation with small temperature differences.

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Authors and Affiliations

  1. Scientific-Production Association NPO GELIIMASh, Moscow, Russia

    O. K. Krasnikova

Authors
  1. O. K. Krasnikova
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Translated from Khimicheskoe i Neftegazovoe Mashinostroenie, No. 7, pp. 15–19, July, 2008.

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Krasnikova, O.K. Double-tube coil heat exchangers of cryogenic helium units. Chem Petrol Eng 44, 374–381 (2008). https://doi.org/10.1007/s10556-008-9067-x

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  • DOI: https://doi.org/10.1007/s10556-008-9067-x

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