| 摘要: |
| 冰浆由于良好的热物特性，在许多领域得到广泛的应用，其制取方式也成为关注的焦点。过冷水动态制冰是目前最有发展前途的制取冰浆方式之一，但其主要缺陷是过冷却器易发生冰堵。在此，基于水溶液结晶的机理，从影响过冷却器冰堵的因素出发，指出纳米氟碳表面改性材料可改善表面状况，有效抑制壁面结冰，减少制冰过程中的冰堵问题，提高整个系统的制冰效率，降低能耗。纳米氟碳涂层抑制过冷却器冰堵的机理对进一步深化和开发新一代防结冰技术有一定意义。 |
| 关键词: 工程热物理 冰堵 结晶 纳米氟碳涂层 超疏水表面 接触角 |
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| Mechanism of Nano-fluorocarbon Coating Restraining Ice Blocking in Supercooled Heat Exchanger |
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Wang Hong, He Guogeng, Tian Qiqi, Yang Liyuan
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| (College of Energy & Power Engineering, Huazhong University of Science and Technology) |
| Abstract: |
| Ice slurry has been widely used in many fields because of its thermal properties, and ice-making technology has become a focus of study. Dynamic ice-making with supercooled water is one of the most promising method in making ice slurries, but the major defect of this method is that the ice blocking easily take place in the supercooled heat exchanger. Based on the theory of water crystallization and the analysis of the influence factors of ice blocking, a nano-fluorocarbon coating was used to improve the surface conditions of the supercooled heat exchanger and to restrain water from freezing. It is concluded that the nano-fluorocarbon coating will effectively restrain crystallization on the wall and improve the efficiency of the ice-making unit, which results in the decrease of ice blocking and the energy consumption. The investigation will benefit in developing and improving anti-icing techniques. |
| Key words: Engineering thermophysics Ice blocking Crystallization Nano-fluorocarbon coating Super-hydrophobic surface Contact angle |
