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Theoretical analysis of freeze-drying apparatus driven by low-grade heat source.

[In Chinese. / En chinois.]

Author(s) : NIU M., ZHANG S., HONG D., et al.

Type of article: Article

Summary

Theoretical analysis is made for a freeze dryer driven by low-grade heat source. Its condenser utilizes LiCl solution which is continuously regenerated, and its refrigeration system adopts ammonia-water absorption type. Through thermodynamic analysis, it is demonstrated that 13573~20747kJ heat is needed for the removal of 1kg water from the material which eutectic temperature varies between -10 and -35?, if the freeze dryer is used in summer in east China. The energy saving potential is thus significant.

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Pages: 10-13

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