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Abstract
In order to achieve low temperature at different positions, two coaxial pulse tube cryocoolers driven by one linear compressor have been designed, built and tested at Shanghai Institute of Technical Physics (SITP), Chinese Academy of Sciences. The performances of two coupled pulse tube cryocoolers were investigated at different operating frequencies from 50Hz to 60Hz and different charging pressures from 2.0MPa to 3.2MPa and its reject temperature dependence was observed in the range of 290–320K by the test bench. Experimental results showed that the performances of the two pulse tube cryocoolers, which were designed identically, were different. After being coupled, the differences of the performance between the two pulse tube cryocoolers were more obvious. These two pulse tube refrigerators could obtain a low-noise cooling capacity of more than 1.79W at 60K and 1.38W at 60K, respectively.
Published Version
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