• 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 ...
    • 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 the Charged Pressure on GM Cryocooler Performance. 

      Nezuka, H.; Nakagome, H.; Ota, M.; Numazawa, T.; Masuyama, S.; Nakashima, N.; Ikeya, Y. (Georgia Institute of TechnologyICC Press, 2008-05)
      This paper presents experimental results that show that the refrigeration efficiency of GM refrigerators can be improved by applying a charged pressure. Recently, there has been remarkable progress in superconducting ...
    • 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 ...