污水换热器污垢生长特性试验研究.pdf

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第 26 卷,总第 150 期《节能技术》 Vol 26 ,Sum No 150

2008 年 7 月,第 4 期 ENERGY CONSERVATION TECHNOLOGY Jul 2008 ,No 4
污水换热器污垢生长特性试验研究
吴学慧,孙德兴
(哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨 150090)
摘要:污水换热器污垢是影响污水冷热源应用的主要因素。了解污垢的形成规律是污水换
热器应用与研究的基本要求。基于工程现场实验,通过热阻法测定污水换热器管程内污垢的热阻
θ
变化模型 R (θ) = 8 × 10 - 4 1 - exp - 。提出了污垢形成过程有效热阻与有效总传热系数
f 188
t
的概念。并通过热阻模型提出了渐进型污垢形成过程的压降模型Δ(Δp) = A - Bexp - 。为
t0
进一步的研究与应用提供了理论基础。
关键词:污水换热器;污垢;模型;实验
中图分类号:TK172 文献标识码:A 文章编号:1002 - 6339 (2008) 04 - 0300 - 05
Experimental Study of Growth Characteristics of Fouling
in Sewage Heat Exchangers
WU Xue - hui ,SUN De - xing
(School of Municipal and Environmental Engineering ,Harbin Institute of Technology ,Harbin 150090 ,China)
Abstract :The fouling of sewage heat exchangers is the main factor that impacts the application of sewage cool
ing and heating source Knowing the formation magnesium of fouling is the basic requirement of application and
θ
research of sewage heat exchangers The thermal resistance model R (θ) = 8 × 10 - 4 1 - exp - is
f 188
developed based on the experiments The effective thermal resistance and the effective coefficient of heat trans
fer during the formation of fouling are defined The pressure loss model of fouling of asymptotic distribution is
proposed These supply the theoretical basis for further study and applic