• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2017, Vol. 53 ›› Issue (4): 122-133.doi: 10.3901/JME.2017.04.122

• 可再生能源与工程热物理 • 上一篇    下一篇

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空调换热器表面排水性能计算模型整体影响及改进方法综述*

徐象国1,2, 詹思成1,2, 梁灏彬1,2, 王晓非1,2, 钟子文1,2   

  1. 1. 浙江大学制冷与低温研究所 杭州 310027;
    2. 浙江大学浙江省制冷与低温技术重点实验室 杭州 310027
  • 出版日期:2017-02-20 发布日期:2017-02-20
  • 作者简介:徐象国,男,1981年出生,博士,副教授。主要研究方向为空调系统运行性能、建模与控制。E-mail:zjuxgxu@zju.edu.cn
  • 基金资助:
    * 高等学校博士学科点专项科研基金(20130101120144)、国家自然科学基金(51306160)和中央高校基本科研业务费专项资金(2015QNA4012)资助项目; 20160412收到初稿,20161114收到修改稿;

XU Xiangguo1, 2 ZHAN Sicheng1, 2 LIANG Haobin1, 2 WANG Xiaofei1, 2 ZHONG Ziwen1, 2

XU Xiangguo1,2,  ZHAN Sicheng1,2,  LIANG Haobin1,2,  WANG Xiaofei1,2, ZHONG Ziwen1,2   

  1. 1. Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027;
    2. Key laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Zhejiang University, Hangzhou 310027
  • Online:2017-02-20 Published:2017-02-20

摘要:

在空调运行过程中,当换热器表面温度低于空气露点温度时,换热器表面就会产生冷凝水。湿工况下附着在换热器表面的冷凝水若不能及时排除,会对换热器的传热效率、流动阻力等产生多方面的影响,从而影响空调系统的整体性能,增加空调系统能耗的同时还会降低用户舒适度。针对这一问题,通过文献调研,从三个方面对相关的研究工作进行总结分析:整理描述换热器表面排水性能和冷凝液滴状态的重要参数,并着重介绍计算表面液滴总滞留量的数学模型,分析影响表面液滴状态的多种因素;对换热器表面附着的冷凝水对换热器本身和整个空调系统的影响进行分析;接着整理增强换热器排水能力的主要方法。对这几个方面现有研究存在的缺陷进行分析,提出未来可能的研究方向。

关键词: 表面排水性能, 冷凝水滞留量, 流动阻力, 显热换热效率, 空调换热器

Abstract:

During the operation of air conditioning system, once the surface temperature of heat exchanger is below the dew point of conditioned air, condensate will form on the surface of heat exchanger. The condensate may deteriorate the performance of air conditioner by affecting the heat transfer coefficient and flow resistance of an evaporator, enlarging the energy consumption and reducing the user comfort level. Related literatures are summarized from three aspects: Parameters used to describe the wettability of the surface and the condensate characteristics are introduced, with a prime model to calculate the mass of condensate retention; The influence of the retained condensate on the performance of heat exchanger and the whole air condition system is analyzed; Major methods to improve the drainage ability of the heat exchanger are listed. Inadequacy of current studies is discussed and future prospects of research on this topic are proposed.

Key words: condensate retention, flow resistance, sensible heat transfer coefficient, surface wettability, heat exchanger