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Operational performance of a cryogenic loop heat pipe with insufficient working fluid inventory.

Author(s) : MO Q., LIANG J.

Type of article: Article, IJR article

Summary

A cryogenic loop heat pipe (CLHP) has been developed for future aerospace applications at the Technical Institute of Physics and Chemistry. It has been demonstrated that this CLHP, when placed horizontally, can operate in liquid-nitrogen temperature range and have a heat transfer capability of up to 12 W with proper working fluid inventory. This paper presents some particular characteristics of the CLHP when the compensation chamber is half-filled with liquid-phase working fluid before start-up. The device has been tested at different orientations using nitrogen as the working fluid in order to compare its thermal behaviour, specially related to the heat transfer capability, the operation temperature and the thermal resistance, as well as to investigate its operational characteristics under power level as low as 1 W. Tests were performed for the CLHP at horizontal position and with the liquid line 3.4 and 6.4 cm below the vapour line, respectively. The experimental results show the operationability of the CLHP tested at three orientations and tests with the liquid line 6.4 cm below the vapour line show lower operation temperatures and higher heat transfer capability.

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Pages: 519-527

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Details

  • Original title: Operational performance of a cryogenic loop heat pipe with insufficient working fluid inventory.
  • Record ID : 2006-1678
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 29 - n. 4
  • Publication date: 2006/06

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