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Les systèmes cryogéniques à l'hélium pour les applications militaires et spatiales.

Sisteme criogenice cu heliu pentru aplicatii militare si spatiale./ Helium cryogenics systems for military and space applications.

Auteurs : DUTA O. D., BRAD S., BALTARETU F.

Type d'article : Article

Résumé

Cryogenic technologies are high energy consuming operation and their specific rules impose strict security because to be taken into account that you cannot talk about engineering masters without cryogenic gas liquefaction, separation and purification of their submitted. In cryogenic applications, one can remark the throttling processes (the Joule-Thomson effect) and the adiabatic expansion, as well as the importance of the study of the liquefied fluid vaporization by heating due to the low-temperature heat exchange, including thermal radiation. The cryocoolers and microcoolers are the equipment suited for military and space high-resolution system applications. The performance capabilities of various cryocoolers widely used in microwave, MM-wave, infrared, and electronic sensors are summarize, with an emphasis on reliability, maintenance requirements, and cooling capacity. Potential applications of this cryocooler include space sensors and complex, unattended military systems in secluded areas, where continuous operation with high reliability is of high importance. Significant improvements in the performance of cryogenically cooled microwave components, photonic devices, infrared detectors, focal planar arrays high resolution CCD-based cameras, missile seeker receivers, high-resolution imaging sensors for complex military systems and best suited for space based systems are identified.

Détails

  • Titre original : Sisteme criogenice cu heliu pentru aplicatii militare si spatiale./ Helium cryogenics systems for military and space applications.
  • Identifiant de la fiche : 2010-0374
  • Langues : Anglais
  • Source : Bul. stiint. UTCB - vol. 52 - n. 2
  • Date d'édition : 2009
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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