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- W639303684 abstract "To obtain a convenient and reliable pre-cooling method for research at -30℃ and -60℃, a two-stage cascade cycle pre-cooling equipment was designed and set up. The R22 and R23 were used as refrigerants in the two stages respectively. An internal heat exchanger was set in low-temperature cycle, which could enhance the overall COP and make it possible for the low-temperature stage to run independently. The experimental results indicate that the pre-cooling equipment can provide refrigerating output at -30℃ and -60℃ respectively and the low temperature cycle can run in single mode at -60℃ stably." @default.
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- W639303684 date "2009-04-30" @default.
- W639303684 modified "2023-09-27" @default.
- W639303684 title "-30℃/-60℃复叠低温预冷设备的设计及实验" @default.
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