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The thermal characteristics of a closed two-phase thermosiphon at low temperature difference.

Author(s) : LI H., AKBARZADEH A., JOHNSON P.

Type of article: Article

Summary

The applications of closed two-phase thermosiphons are increasing in heat recovery systems because of their high effective conductivity. However, their range of application is limited by the need for some minimum temperature difference between the evaporator and condenser sections to initiate nucleate boiling. In the project described, the steady-state heat transfer characteristics for vertical two-phase closed thermosiphons at low temperature differences with R11, R22 and water as working fluid were studied experimentally. From these experimental results, the minimum temperature differences required to initiate and sustain boiling in the low temperature thermosiphons have been established for the above working fluids. A method for improving the performance at low temperature difference was devised on the basis of a thermal triggering system. Triggering could also be achieved by mechanical vibration.

Details

  • Original title: The thermal characteristics of a closed two-phase thermosiphon at low temperature difference.
  • Record ID : 1992-2632
  • Languages: English
  • Source: Heat Recov. Syst. CHP - vol. 11 - n. 6
  • Publication date: 1991

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