【摘要】 文章选取室外实际运行的翅片管换热器，在采样分析其表面沉积粉尘粒度的基础上，搭建换热器积灰实验台，以平直翅片管换热器为测试样件，研究积灰对换热器空气侧传热和压降的影响。结果表明，换热器表面不同位置沉积粉尘的粒径分布规律相近，沉积粉尘的粒径集中分布在1～100μm；换热器空气侧积灰对压降的影响大于对换热的影响；高风速能够减小积灰对换热器空气侧传热和压降的影响，当风速从1.5 m/s增大到3.0m/s，空气侧污垢热阻减小54%，压降增幅减小18.3%；换热器稳定后的空气侧污垢热阻及压降增幅，在低风速时随粉尘粒径的增大而减小，高风速时随粉尘粒径的增大而增大。更多还原

【Abstract】 In this paper, a fin-tube heat exchanger that is actually operating outdoors, based on analyzing the particle size of the deposited dust on its surface, builds a heat exchanger dust deposition test bench. The plane finned tube heat exchanger is used as the test sample,the effect of dust deposition on the heat transfer and pressure drop on the air side of the heat exchanger. The results show that the size distribution of deposited dust at different positions on the surface of heat exchanger is similar, and the dust particle size distribution of deposited dust is concentrated in the range of 1～100 μm. The effect of dust deposition on the air side of the heat exchanger on the pressure drop is greater than that on the heat transfer. High wind speed can reduce the effect of dust deposition on heat transfer and pressure drop on the air side of heat exchangers. the wind speed increases from 1.5 m/s to 3.0 m/s, the fouling heat resistance decreases by 54%, and the increment of pressure drop decreases by 18.3%. After the dust deposition of the heat exchanger is stable, the fouling heat resistance and increment of pressure drop on the air side decreases with the increase of dust particle size at low wind speed, and increases with the increase of dust particle size at high wind speed.更多还原