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Study of the cool-down process of a cryogenic valve in liquid nitrogen.

Author(s) : JIN T., XIA Y. L., TANG K., et al.

Summary

In order to guide producing practice, numerical simulation of dynamic temperature profile is conducted on a cryogenic valve emerged in liquid nitrogen, which is a typical working status for its cryogenic test. Three calculation models of different statuses, based on revised experiential equations for boiling heat transfer, have been set up. Systematic simulations have been carried out to predict cool-down process of cryogenic valves, focusing on the cool-down time and dynamic temperature profile. Based on the simulation results, an insulation layer is proposed to be attached to the valve stem, avoiding the occurrence of freezing at the top of packing gland during cryogenic test.

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Pages: ICR07-A2-410

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Details

  • Original title: Study of the cool-down process of a cryogenic valve in liquid nitrogen.
  • Record ID : 2007-2419
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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