Now showing items 1-14 of 14

    • Development of 15 K Pulse Tube Cold Fingers for Space Applications at CEA/SBT 

      Duval, J. M.; Charles, I.; Coynel, A.; Gauthier, A. (Georgia Institute of TechnologyICC Press, 2008-05)
      Pulse tube coolers for space applications have been developed for many years at CEA/SBT. After successful developments of products in the 50 – 80 K range, our focus has changed to temperature below 20 K. Our work is based ...
    • Development of High Efficiency 4 K Two-Stage Pulse Tube Cryocooler 

      Xu, M.; Takayama, H.; Nakano, K. (Georgia Institute of TechnologyICC Press, 2008-05)
      Sumitomo Heavy Industries has been continuously improving the efficiency of our 4K pulse tube cryocooler in order to make it exchangeable with our 4K GM cryocooler. In order to improve the performance, three development ...
    • Development of SITP’s Large Capacity High Frequency Coaxial Pulse Tube Cryocoolers 

      Dang, H. Z.; Wang, L. B.; Wu, Y. N.; Li, S. S.; Yang, K. X.; Shen, W. B.; Fu, H. (Georgia Institute of TechnologyICC Press, 2008-05)
      Large capacity high frequency single-stage coaxial inertance pulse tube cryocoolers have been developed and are becoming mature in SITP/CAS. The main objective of the development is to provide larger low-noise cooling ...
    • Dynamic Operation of a 4 K Pulse Tube Cryocooler with Inverter Compressors 

      Wang, C. (Georgia Institute of TechnologyICC Press, 2008-05)
      This paper introduces the concept of operating a 4 K pulse tube cryocooler using an inverterdriven compressor. The cryocooler is a Cryomech model PT410. By adjusting the power frequency of the inverter compressor from 46 ...
    • Effect of Component Geometry on Flow Non-uniformities in a Large Pulse Tube Cryocooler 

      Lewis, M. A.; Taylor, R. P.; Radebaugh, R.; Bradley, P. E. (Georgia Institute of TechnologyICC Press, 2008-05)
      A single-stage pulse tube cryocooler was designed to achieve 50 W of refrigeration power at 50 K when driven by a pressure oscillator that can produce up to 2.8 kW of acoustic power at 60 Hz. Initial experimental data ...
    • Performance of a Stirling-Type Pulse Tube Cooler for High Efficiency Operation at 100 Hz. 

      Wang, Xiaotao; Dai, Wei; Hu, Jianying; Luo, Ercang; Zhou, Yuan (Georgia Institute of TechnologyICC Press, 2008-05)
      High efficiency pulse tube coolers driven by linear compressors usually operate between 30 Hz and 60 Hz. This article presents the performance of a high efficiency in-line PTC with an operating frequency of 100 Hz. The ...
    • Performance Test of Pulse Tube Cooler with Integrated Circulator 

      Maddocks, J. R.; Maddocks, P.; Fay, M.; Helvensteijn, B. P. M.; Kashani, A. (Georgia Institute of TechnologyICC Press, 2008-05)
      To address the need for remote and broad area cooling using regenerative cryocoolers, Atlas Scientific is developing a lightweight, continuous-flow Integrated Circulator (IC) for installation on Pulse Tube Cryocoolers ...
    • Pulse Tube Cooler with Remote Cooling 

      Raab, J.; Maddocks, J. R.; Nguyen, T.; Toma, G.; Colbert, R.; Tward, E. (Georgia Institute of TechnologyICC Press, 2008-05)
      Space pulse tube coolers are very efficient, but like all regenerative high frequency Stirling and pulse tube coolers, the cold head needs to be located near the compressor in order to minimize the input power to the cooler. ...
    • Self-Induced Vibration of NGAS Space Pulse Tube Coolers 

      Colbert, R.; Nguyen, T.; Raab, J.; Tward, E. (Georgia Institute of TechnologyICC Press, 2008-05)
      Space cryocoolers are often used to cool the focal planes and optics of telescopes. Since telescope and focal plane jitter can affect the clarity of the image, space cryocoolers are designed for inherent low vibration. For ...
    • Simulation of Boundary Layer Effects in the Pulse Tube of a Miniature Cryocooler 

      Conrad, T. J.; Ghiaasiaan, S. M. (Seyed M.); Kirkconnell, Carl Scott (Georgia Institute of TechnologyICC Press, 2008-05)
      As pulse tube cryocoolers are miniaturized, boundary layer effects in the pulse tube may become more important than they are for larger refrigerators. Nearly uniform flow in the pulse tube is necessary for efficient cooling, ...
    • SITP’s Miniature Coaxial Pulse Tube Cryocooler 

      Dang, H. Z.; Wang, L. B.; Wu, Y. N. (Georgia Institute of TechnologyICC Press, 2008-05)
      A single-stage miniature coaxial pulse tube cryocooler (PTC) has been developed in Shanghai Institute of Technical Physics, Chinese Academy of Sciences (SITP/CAS) to serve as a perfect substitute for an existing Stirling ...
    • Space Micro Pulse Tube Cooler 

      Nguyen, T.; Petach, M.; Michaelian, M.; Raab, J.; Tward, E. (Georgia Institute of TechnologyICC Press, 2008-05)
      The Northrop Grumman space micro pulse tube cooler (micro) is a split configuration cooler incorporating a coaxial cold head connected via a transfer line to a vibrationally balanced back to back linear compressor. The ...
    • A Study of a Miniature In-Line Pulse Tube Cryocooler 

      Sobol, S.; Katz, Y.; Grossman, G. (Georgia Institute of TechnologyICC Press, 2008-05)
      A miniature pulse tube cryocooler has been designed and tested in our laboratory. The main part of the cryocooler, consisting of an in-line assembly of aftercooler, regenerator, cold heat exchanger, buffer tube and hot ...
    • Theoretical and Experimental Investigation of 30 K Single Stage GM-Type Pulse Tube Cryocooler 

      Desai, S.; Desai, K. P.; Naik, H. B.; Atrey, M. D. (Georgia Institute of TechnologyICC Press, 2008-05)
      Theoretical modeling of thermodynamic performance plays an important role in the design and development of pulse tube cryocoolers. In the present work, a thermodynamic model of a GMtype double-inlet pulse tube cryocooler ...