| 摘要: |
| 过冷水法动态冰浆制取技术具有换热效率高、系统简单等优点，但过冷却器易发生冰堵是影响其稳定性的突出问题。本文提出一种基于模块化过冷解除装置的动态制冰系统，利用设置在过冷却器内的可灵活拆装式螺旋叶片对制冰溶液进行过冷解除，同时刮削换热壁面上粘附的冰晶。测试了不同工况下该制冰系统的性能，结果表明该制冰系统可稳定产出冰浆并有效改善冰堵问题，最高含冰率达9.1%，最大持续制冰时间可达521 s。冰浆含冰率与持续制冰时间成正比。NaCl添加剂质量分数为6%时对冰浆含冰率和持续制冰时间的改善效果显著。实验获得制冰系统最佳运行参数：制冰溶液流量为0.50 m3/h、二次冷媒起始温度为﹣15 ℃、螺旋叶片转速为175~225 r/min。 |
| 关键词: 冰浆 过冷度 制冰能力 相变 |
| DOI： |
| 投稿时间：2019-01-18 修订日期：2019-05-12
|
| 基金项目:能源与环境光催化国家重点实验室开放课题（SKLPEE-KF201819）和福建省中青年教师教育科研项目（JAT170076）资助。 |
|
| Experimental Study on Ice Slurry System Based on Modular Super-cooling Releasing Device |
|
Zhuang Kunyu1, Liu Xi1,2, Yao Wei1, Fu Ruansong1, Wang Zhiqiang2, Li Xuelai1
|
| (1.College of Chemical Engineering, Fuzhou University;2.Fujian Snowman Co., Ltd.) |
| Abstract: |
| Dynamic ice-making technologies with super-cooled water can produce ice slurry efficiently; however, the prominent problem in the stability of this method is that ice blocking easily takes place in the super-cooling heat exchanger. This study developed a dynamic ice-making system based on a modular super-cooling releasing device which was set inside a super-cooled heat exchanger. Its main structure are dismountable spiral blades that can release super-cooled state of solutions and scrape the ice on the heat transfer surface. The performance test of the ice making system under different working conditions shows that the ice making system can stably produce ice slurry and effectively improve the ice-blocking problem. The highest ice packing fraction reached 9.1%, the maximum continuous ice making time was up to 521 s. The ice packing fraction increases with the continuous ice-making time. When the mass fraction of sodium chloride solution was 6%, the ice packing fraction and continuous ice-making time were significantly improved. The experiment obtained the optimal operating parameters of the ice making system: the flow rate of the ice making solution is 0.50 m3/h, the secondary refrigerant temperature is ﹣15 ℃, and the rotating speed of the spiral blades is between 175~225 r/min. |
| Key words: ice slurry degree of subcooling ice-making capacity phase change |
