蒸发式过冷水制冰液滴蒸发结晶的模拟  

Modeling of water droplet in super-cooling water evaporative system for ice slurry production

作　　者：马善军 李鹏辉[2] 孔令健[2] 李少华[1] 韩吉田[2] Ma Shanjun Li Penghui Kong Lingjian Li Shaohua Han Jitian(School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China School of Energy and Power Engineering, Shandong University, Jinan 250061, China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]山东大学能源与动力工程学院,济南250061

出　　处：《农业工程学报》2016年第23期213-217,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金(51376110);教育部博士点基金(2013013110006)

摘　　要：蒸发式过冷水制冰系统中液滴传热传质特性研究具有重要意义。为了分析蒸发式过冷水制冰系统中液滴的热质传输特性,该文将单个液滴冷却结晶过程分为全液相区、固-液两相区和全固相区3个不同区域,建立液滴在大空间内蒸发降温结晶过程的数学模型,通过数值求解方法研究其在大空间蒸发室内降温结晶过程的温度变化特性,进一步分析液滴和空气的入口参数与液滴整个蒸发结晶特性的关系,为蒸发式过冷水制冰系统的结构优化设计和运行管理提供参考依据。Ice storage technology is considered as one of the most promising options to achieve the so-called ＂peak load leveling of power system＂ and to relieve the contradiction between the supply and demand of peak power currently encountered in China. Among the ice-producing methods being developed around the world, the evaporative supercooling water ice-making one is a new and efficient way for ice slurry production of large scale without ice blockage. Therefore, it is of significant importance to investigate the heat and mass transfer characteristics during the cooling and crystallization process of water droplets in the evaporative supercooling water ice-making chamber to the development of practical ice-making system. In order to analyze the heat and mass transfer characteristics of water droplets in an evaporative super-cooling water system for ice slurry production, we proposed a mathematical model for the cooling and crystallization process of a single water droplet falling in the evaporation chamber with large space, which comprehensively took into account the three different zones of entire liquid phase, solid-liquid interphase and entire solid phase during the cooling and crystallization process of a water droplet. The developed mathematical model was then validated by use of the theoretical and experimental results presented in the available literature and satisfactory agreement was achieved in between the model simulation results and the research ones reported in the literature, indicating the correctness of the mathematical model. The parameter variations of the water droplet with changes in some of the key system operating variables, such as the inlet size and temperature of water droplet, the flow rate and relative humidity of the cold air, were numerically determined by solving the developed mathematical model. Effects of the inlet size and temperature of water droplet, inlet temperature, flow rate and relative humidity of the cold air in the evaporation chamber on the entire cooling and crystallizat

关 键 词：蒸发 冷冻 冰 蒸发过冷水 冰蓄冷 冰浆 液滴 降温结晶 

分 类 号：TK02[动力工程及工程热物理]