| 摘要: |
| 冷凝器和蒸发器是压缩式制冷空调机组中的重要设备，其传热系数的高低直接影响机组的效率和成本。采用强化传热技术是提高冷凝器与蒸发器传热性能的关键。对于管外冷凝传热强化，在Turbo-C管的基础上，将翅片从翅顶到翅根完全割裂，形成断裂的三维翅片管，以减少表面张力作用下冷凝液在传热管表面粘滞特性对传热的影响。采用螺旋隔板替代冷凝器和干式蒸发器的弓型隔板，能改善壳程流体的流动与传热性能；针对降膜蒸发器的降膜蒸发区与满液蒸发区的不同特点，应分别采用不同类型的强化管，以提高蒸发器传热系数。 |
| 关键词: 热工学 强化传热 冷凝器 蒸发器 制冷空调机组 |
| DOI： |
| 投稿时间：2012-03-14
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| 基金项目: |
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| A Review on Heat Transfer Enhancement in Shell-and-tube Heat Exchanger of Compression Type Refrigeration and Air Conditioning Unit |
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Zhang Zhengguo, Shi Guoquan, Xu Tao, Gao Xuenong, Wang Shuangfeng
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| (The Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, South China University of Technology) |
| Abstract: |
| Heat exchangers including condenser and evaporator are important equipments in the compression type refrigeration and air conditioning units, and their heat transfer coefficients have a direct effect on the efficiency and cost of the units. The application of the heat transfer enhancement technology is a key route to improve the heat transfer performance of the condenser and evaporator. For the condensation heat transfer enhancement on the tube outside of condenser, the fractured fins of Turbo-C can be separated from the tips to the roots to reduce the effect of the viscous property of condensate on the heat transfer performance at the presence of surface tension. The replacement of the segmental baffles with the helical baffles can improve the flow characteristics and heat transfer performance of the condenser and dry evaporator. Considering the different heat transfer characteristics between the falling film regions and the flooded evaporation regions in the falling film evaporator, different types of enhanced tubes should be used to improve the heat transfer performance of the evaporator. |
| Key words: pyrology heat transfer enhancement condenser evaporator refrigerant and conditioning units |
