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Cryocoolers 12

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概要 The last two years have witnessed a continuation in the breakthrough shift toward pulse tube cryocoolers for long-life, high-reliability cryocooler applications. One class of pulse tubes that has reac...hed maturity is referred to as 'Stirling type' because they are based on the linear Oxford Stirling-cooler type compressor; these generally provide cooling in the 30 to 100 K temperature range and operate at frequencies from 30 to 60 Hz. The other type of pulse tube cooler making great advances is the so-called 'Gifford-McMahon type. ' Pulse tube coolers of this type use a G-M type compressor and lower frequency operation to achieve temperatures in the 2 to 10 K temperature range. Nearly a third of this proceedings covers these new developments in the pulse tube arena. Complementing the work on low-temperature pulse tubes is substantial continued progress on rare earth regenerator materials and Gifford-McMahon coolers. These technologies continue to make great progress in opening up the 2 - 4 K market. Also in the commercial sector, continued interest is being shown in the development of long-life, low-cost cryocoolers for the emerging high temperature superconductor electronics market, particularly the cellular telephone base-station market. At higher temperature levels, closed-cycle J-T or throttle-cycle refrigerators are taking advantage of mixed refrigerant gases to achieve low-cost cryocooler systems in the 65 to 80 K temperature range.続きを見る
目次 Government Cryocooler Development Programs
Space Stirling Cryocooler Developments
Tactical and Commercial Stirling Cryocoolers
Tactical and Commercial Pulse Tube Cryocoolers
Space Pulse Tube Cryocooler Developments
Linear Compressor Development and Modeling
GM-Type Pulse Tube Coolers for Low Temperatures
Hybrid Cryocoolers Using Pulse Tubes
Pulse Tube Analyses and Experimental Measurements
GM Refrigerator Developments
Thermoacoustic Refrigerator Investigations
Regenerator Materials Development
Regenerator Performance Analyses and Tests
Turbo-Brayton Cryocooler Developments
J-T and Throttle-Cycle Cryocooler Developments
Sorption Cryocooler Developments
Sub-Kelvin and Optical Refrigerator Developments
Cryocooler Integration Technologies
Space Cryocooler Applications
Commercial Cryocooler Applications.
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登録日 2020.06.27
更新日 2020.06.28