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Dynamic simulation on temperature decreasing characteristics of mixed-refrigerant cryogenic liquefaction system.

[In Chinese. / En chinois.]

Author(s) : ZHANG P., GUO K., DENG W., et al.

Type of article: Article

Summary

The cooling process of mixed-refrigerant (MR) cryogenic system is time-consuming, the composition of MR has significant influence on the temperature decreasing rate, and the optimization of the MR charging process is crucial in order to obtain quick temperature decreasing rate and reliable running condition. Based on the fundamental principle of two phase volume node, this article established dynamic simulation method for MR cryogenic system. The simulation results are validated by the experimental data successfully. The main work focuses on the temperature decreasing characteristics of the system with different refrigerant charging process. The results reveal that when the phase change temperature of the charging refrigerant is around the system temperature, the temperature decreasing rate is the quickest. In their own charging temperature field, when the charging CH4 is 12% ~ 16%, and N2 is 9% ~ 12% of total MR in system on mole basis, the temperature decreasing rate and working condition of the studied system in this article can be promoted effectively during these two cooling process.

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Pages: 71-77

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Details

  • Original title: [In Chinese. / En chinois.]
  • Record ID : 30020626
  • Languages: Chinese
  • Source: Journal of Refrigeration - vol. 36 - n. 162
  • Publication date: 2015/04

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