Performance of a Stirling-Type Pulse Tube Cooler for High Efficiency Operation at 100 Hz.
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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 theoretical model of a PTC is based on thermoacoustic theory. Analytical results indicate that the PTC operating at 100 Hz could obtain a high efficiency with appropriate parameters. To couple the PTC, the parameters of linear compressor are optimized using compressor governing equations. Experimental results show that a no-load temperature of 31.8 K and a cooling power of 12.4 W at 77 K are obtained with an input electric power of 185.2 W.