• 14.5 K Hydrogen Sorption Cooler: Design and Breadboard Tests 

      ter Brake, H. J. M.; Burger, J. F.; Holland, H. J.; Meijer, R. J.; Mudaliar, A. V.; Zalewski, D. R.; Linder, M. (Georgia Institute of TechnologyICC Press, 2008-05)
      At the University of Twente, a 14.5 K hydrogen-based sorption cooler is under development. It can be used as a stand-alone 14.5 K cooler, or as a precooler, e.g., in combination with a 4 K heliumbased sorption cooler. The ...
    • Analysis of Multi-Stage Joule-Thomson Microcoolers 

      Cao, H. S.; Lerou, P. P. P. M.; Mudaliar, A. V.; Holland, H. J.; Derking, J. H.; Zalewski, D. R.; ter Brake, H. J. M. (Georgia Institute of TechnologyICC Press, 2008-05)
      Microcoolers machined from glass wafers based on Joule-Thomson (J-T) expansion have been investigated for many years at the University of Twente. After successful development of singlestage J-T microcoolers with a cooling ...
    • Development of a Miniature Fast Cool Down J-T Cryocooler 

      Tzabar, N.; Lifshits, I. (Georgia Institute of TechnologyICC Press, 2008-05)
      One major advantage of Joule-Thomson (J-T) cryocoolers over other cryocoolers is the ability to achieve a very fast cool-down, in the range of only a few seconds. The main fluid is chosen according to the desired cooling ...
    • Effect of Heat Exchanger Configuration on the Performance of Joule-Thomson Refrigerators 

      Hong, Yong-Ju; Park, Seong-Je; Choi, Young-Don (Georgia Institute of TechnologyICC Press, 2008-05)
      A typical Joule-Thomson (J-T) refrigerator consists of a recuperative heat exchanger, a gas expansion nozzle, a mandrel, and a compressed gas storage bottle. The thermodynamic performance of a J-T refrigerator depends ...
    • Heat Rejection Capacity in Miniature Thermoacoustic Expanders at Cryogenic Temperature 77 K 

      Hu, Zhimin; Roberts, T. (Georgia Institute of TechnologyICC Press, 2008-05)
      Miniaturized thermoacoustic expanders MTAEs are a new type of expander designed to improve the cooling efficiency of recuperative type cryocoolers without sacrificing their reliability and simplicity. Experimental studies ...
    • Open Cycle Joule-Thomson Cryocooling by Mixed Coolant 

      Maytal, B-Z. (Georgia Institute of TechnologyICC Press, 2008-05)
      Mixed coolants are conventionally employed for the closed cycle Joule-Thomson mode of cryocooling. Here, the potential of mixed coolants is utilized for reducing the pressure of operation. Numerous experimental and theoretical ...
    • Progress in Joule-Thomson Microcooling at the University of Twente 

      Derking, J. H.; Zalewski, D. R.; Garcia, M.; Holland, H. J.; Mudaliar, A. V.; Cao, H. S.; Lerou, P. P. P. M.; ter Brake, H. J. M. (Georgia Institute of TechnologyICC Press, 2008-05)
      The development of miniaturized Joule-Thomson (JT) coolers has been an ongoing research topic at the University of Twente for many years. In the current research, a new run of singlestage JT microcoolers with gross cooling ...