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Développement et test de performance d’un système expérimental à changement de phase pour le contrôle de flottabilité dans les dirigeables stratosphériques.

Development and performance test of a phase change experimental system for buoyancy control in stratospheric airships.

Auteurs : WANG K., GAO S., WANG Y., XUE L., YIN W., ZHAO Y., GONG M.

Type d'article : Article de la RIF

Résumé

A low-temperature and low-pressure phase change experimental system for regulating the buoyancy of stratospheric airships has been designed and tested. The system is highly compact, and all components are integrated into a modular structure for easy installation and control. The setup operates based on a phase change working gas circulation system using ethylene as the refrigerant and ammonia as the phase change working gas. A microchannel tube bundle heat exchanger was designed as the core of the liquefaction chamber to enhance the condensation heat transfer process under stratospheric conditions. The system was tested for extended periods under simulated stratospheric conditions (− 57 ◦C, 6.5 kPa@19 km) using an environmental simulation chamber. A maximum liquefaction rate of 20.3 m³/h was achieved with a corresponding cooling capacity of 502.2 W and a coefficient of performance of 1.84. Additionally, a maximum vaporization rate of 25.2 m³/h was achieved with the heat rejection rate of 617.9 W and a COP of 2.08. The system can be applied to high-altitude airship platforms for buoyancy control and is also suitable for experimental studies of heat transfer processes in low-temperature, low-pressure environments.

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Format PDF

Pages : 10 p.

Disponible

  • Prix public

    20 €

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    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Development and performance test of a phase change experimental system for buoyancy control in stratospheric airships.
  • Identifiant de la fiche : 30034478
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 181
  • Date d'édition : 01/2026
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2025.10.014

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