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摘要： 简要介绍了热阻法换热管内污垢生长特性试验台及试验原理，详细讨论了试验方案。试验研究了新管道内污垢首次生长特性和经过不同除污措施后管内污垢再次生长特性，发现新管道内污垢呈线性和指数函数渐进性双阶段首次生长特性，除污后管内污垢呈指数函数渐进性再次生长特性。结果表明，在试验水质下，对于新管道，经过7 d左右管内污垢就可生长到最大厚度；对于除污后管道，经过2 d左右管内污垢即可达到最大厚度。 关键词 ：热阻法 换热管 污垢生长 试验 Experimental study of growth characteristics of fouling in pipes by thermal resistance method By Zhang Jili★, Cao Dajun and Ma Zhixian Abstract Briefly presents the test-bed and the experimental principle for monitoring the growth characteristics of fouling in heat exchange pipes by thermal resistance method, discusses the experimental scheme in detail. Experimentally studies growth characteristics of fouling both in new pipes and in used pipes treated by different de-fouling means. Discovers two stage of growth characteristics of fouling in new pipes, linearity and exponential, and re-growth characteristics of fouling in used pipes, exponential. The results show that it almost takes 7 days for fouling to grow up to the maximal thickness in the new pipes, but only 2 days to re-grow up to that scale in used tubes under the experimental water quality conditions. Keywords thermal resistance method, heat exchange pipe, growth of fouling, experiment ★ Dalian University of Technology, Dalian, China