冷冻剑结构对块冰机制冰性能影响的数值模拟  

Numerical simulation of the effect of freezing sword structure on the ice performance of block ice machine

作　　者：孙欢[1] 杨凯 刘晓彤 SUN Huan;YANG Kai;LIU Xiaotong(Tianjin University of Commerce,Key Laboratory of Tianjin Refrigeration Technology,Tianjin 300314,China)

机构地区：[1]天津商业大学天津市制冷技术重点实验室,天津300314

出　　处：《食品与机械》2024年第2期78-83,138,共7页Food and Machinery

基　　金：天津市企业科技特派员项目(编号:22YDTPJC00250)。

摘　　要：目的:在直冷式块冰机冰模蒸发器内部增设冷冻剑以实现快速制冰。方法:使用COMSOL模拟冷冻剑截面形状及冷冻剑倾角对制冰过程的影响。结果:随着制冰过程的持续进行,增设不同截面形状冷冻剑的冰模内部平均温度不断降低,冰模内固相体积分数也随时间而增加,但在相同时间内增设圆形截面冷冻剑的冰模内部平均温度要比三角形、矩形和菱形低0.1~0.2℃。此外,冷冻剑倾角越小制冰速率越快。结论:冷冻剑截面形状为圆形或近圆形时,制冰速率较快;且在保证便于脱冰的前提下,应尽可能减小冷冻剑倾角。Objective:To add a freezing sword inside the evaporator of the ice mould of a direct-cooled block ice machine to achieve rapid ice production.Methods:COMSOL was used to simulate the effects of the cross-sectional shape of the freezing sword and the freezing sword inclination angle on the ice production process.Results:As the ice making process continued,the average internal temperature of the ice mould with additional freezing swords of different cross-sectional shapes decreased and the volume fraction of solid phase in the ice mould increasedd with time,but the average internal temperature of the ice mould with additional freezing swords of circular cross-section was 0.1~0.2℃lower than that of triangular,rectangular and diamond shapes in the same time.In addition,the lower the freezing sword inclination angle was,the faster of the ice production rate it was.Conclusion:The ice-making rate is faster when the cross-section shape of the freezing sword is round or nearly round.Under the premise of ensuring easy de-icing,the angle of inclination of the freezing sword should be reduced as much as possible.

关 键 词：块冰机 冷冻剑 截面形状 倾角 数值模拟 

分 类 号：TB657[一般工业技术—制冷工程]