低品位热源驱动的冻干装置理论分析  

Theoretical Analysis of Freeze-drying Apparatus Driven by Low-grade Heat Source

作　　者：牛梅梅[1] 张绍志[1] 洪大良[1] 陈光明[1] 

机构地区：[1]浙江大学制冷与低温研究所,杭州310027

出　　处：《制冷学报》2013年第4期10-13,共4页Journal of Refrigeration

基　　金：国家重大基础研究计划(2010CB227304);国家自然科学基金(50976097)资助项目~~

摘　　要：对一种低品位热源驱动的冷冻干燥装置进行了理论分析,该装置中冷阱采用连续可再生的氯化锂溶液,制冷系统为氨水吸收式。热力学理论分析表明,在我国华东地区夏季工况下,使用该装置冻干共晶点温度在-10^-35℃之间的物料时,每脱除1kg水分可以有效利用13573~20747kJ的低品位热量,与传统的真空冷冻干燥机相比,节能潜力显著。Theoretical analysis is made for a freeze dryer driven by low-grade heat source. Its condenser utilizes LiC1 solution which is continuously regenerated, and its refrigeration system adopts ammonia-water absorption type. Through thermodynamic analysis, it is dem- onstrated that 13573-20747kJ heat is needed for the removal of lkg 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.

关 键 词：低品位热源 冷冻干燥 节能 氯化锂溶液 

分 类 号：TQ028.63[化学工程] TB61[一般工业技术—制冷工程]