Performance and reliability enhancement of linear coolers

M. Mai; I. Rühlich; A. Schreiter; S. Zehner

doi:10.1117/12.855207

3 May 2010 Performance and reliability enhancement of linear coolers

M. Mai, I. Rühlich, A. Schreiter, S. Zehner

Proceedings Volume 7660, Infrared Technology and Applications XXXVI; 76602N (2010) https://doi.org/10.1117/12.855207
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

Highest efficiency states a crucial requirement for modern tactical IR cryocooling systems. For enhancement of overall efficiency, AIM cryocooler designs where reassessed considering all relevant loss mechanisms and associated components. Performed investigation was based on state-of-the-art simulation software featuring magnet circuitry analysis as well as computational fluid dynamics (CFD) to realistically replicate thermodynamic interactions. As a result, an improved design for AIM linear coolers could be derived. This paper gives an overview on performance enhancement activities and major results. An additional key-requirement for cryocoolers is reliability. In recent time, AIM has introduced linear coolers with full Flexure Bearing suspension on both ends of the driving mechanism incorporating Moving Magnet piston drive. In conjunction with a Pulse-Tube coldfinger these coolers are capable of meeting MTTF's (Mean Time To Failure) in excess of 50,000 hours offering superior reliability for space applications. Ongoing development also focuses on reliability enhancement, deriving space technology into tactical solutions combining both, excelling specific performance with space like reliability. Concerned publication will summarize the progress of this reliability program and give further prospect.

Citation Download Citation

M. Mai, I. Rühlich, A. Schreiter, and S. Zehner "Performance and reliability enhancement of linear coolers", Proc. SPIE 7660, Infrared Technology and Applications XXXVI, 76602N (3 May 2010); https://doi.org/10.1117/12.855207

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