液-液循环流化床传热与制冰特性数值模拟  

Numerical Simulation on Ice-making and Heat Transfer for Liquid-liquid Circulating Fluidized Bed

作　　者：梁坤峰[1] 王志远[1] 袁竹林[2] 

机构地区：[1]河南科技大学车辆与动力工程学院,河南洛阳471003 [2]东南大学能源与环境学院,江苏南京210096

出　　处：《河南科技大学学报（自然科学版）》2007年第6期24-27,56,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：教育部高等学校博士点专项科研基金项目(20060286034);河南科技大学校基金项目(2001QN10)

摘　　要：提出一种新型的液-液循环流化床动态制取流体冰方法,该方法采用水在另一种非相溶载冷液体中雾化形成细小水滴,水滴的运动主要受载冷液体的携带作用,水滴在循环流化床内流动过程中两相直接接触换热,水滴冻结实现制取颗粒流体冰目的。针对水雾化成水滴后循环流化床内水滴、载冷液体、冰颗粒所构成的三相系统,基于欧拉-拉格朗日方法,建立了颗粒轨道模型,模型考虑了相间能量、动量耦合。根据所建立的模型,对循环流化床内的多相流动与传热过程展开研究,获得了循环流化床运行参数对制冰过程的传热量和制冰量的影响规律,所得结果为定量预测液-液循环流化床传热与制冰性能及运行参数的合理选取提供了理论依据。Liquid-liquid circulating fluidized bed,which is a novel method of dynamic ice forming,was studied by using direct contact heat transfer between two immiscible liquids of water droplets and the coolant for ice storage system.A numerical model for modeling multiphase flows,including droplets,coolant and ice particles,and heat transfer in circulating fluidized bed was developed with interphase couple of energy and momentum, then some reliable results were obtained.The calculated results provided a theory basis for the reasonable design of operating and configuration parameters of ice-making bed and forecast of interphase heat transfer and ice-making performance.

关 键 词：动态制冰 直接接触换热 液-液循环流化床 数值模拟 

分 类 号：TB657.1[一般工业技术—制冷工程]