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Analysis on relationship between superheat phenomena and startup temperature for two-phase cooling system.

[In Chinese. / En chinois.]

Author(s) : LIU J., LI T., PEI N., et al.

Type of article: Article

Summary

Experiments on the performance of a new mechanically pumped cooling loop using CO2 as a working fluid were conducted. It was observed during the experiment that there was a superheat phenomenon at the outlet of the evaporator when the heat load was added. Moreover, the superheat degree at the outlet of the evaporator and the pressure pulse caused by the change from superheat state to two-phase state increase with the decrease of the evaporating temperature at the start-up stage. The analysis based on nucleation thermodynamic theory indicated that the critical radius of bubbles would become smaller with the increasing of evaporative temperature. So, a relative lower heat power can change the work fluid from superheat into a stable two-phase state.

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Pages: 23-28

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Details

  • Original title: [In Chinese. / En chinois.]
  • Record ID : 2008-1289
  • Languages: Chinese
  • Source: Journal of Refrigeration - vol. 28 - n. 118
  • Publication date: 2007/12

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