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化学工业与工程 1997, Vol. 14 Issue (1) :3-8    DOI:
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一个大范围适用的固定床传热参数估计方法
程振民,袁渭康
华东理工大学联合化学反应工程研究所
An Extensively Applicable Method for the Evaluation of Heat Transfer Parameters of a Fixed—Bed Reactor
Cheng Zhenmin Yuan Weikang
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摘要 本文研究指出,经典的一维与两维模型传热参数关系式:1U=1hw+R4Ker仅仅在Bi<1.808情况下适用,而Bi的取值通常在1.1和10之间。鉴于此,本文建立了新的传热关系式,它由U=λ122RKer,λ12=12(1-1.33A-0.33和Bi=λ124exp(-aλ12L)T0-TwT(L,m)-Tw-λ12三个式子组成,其使用范围可拓展到Bi10.53,在整个固定床操作域内无条件使用。同时,此法使Ker的估计从两参数的依赖关系中独立出来,实现了分步估计的目的。文中还对一个著名的传热实验(Coberly和Marshal,1951)进行了剖析,揭示出某些实质性问题,对传热研究中应注意的问题提出了建议。
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程振民
袁渭康
关键词固定床反应器   传热参数   一维模型   两维模型   参数估计     
Abstract: The classical relationship of the heat transfer parameters between one—dimensional and two—dimensional models:1U=1h w +R4K er is found only valid when Bi <1 808,which is in disagreement with the normal Bi values of being 1 1 to 10. In considering of this, a new relationship consisting of U=λ 1 22RK er , λ 1 2=12(1-1 33A-0 33) and Bi=λ 1 24 exp (-aλ 1 2L)T 0-T w T(L,m)-T w -λ 1 2 is introduced, with its validity extended to Bi 10 53, which implies that this relation can practically be used without any limitation in the whole fixed—bed reactor operation domain. Simultaneously, the analytical method makes the estimation of K er irrelevant with the relationship between the two parameters,therefore the two parameters can be separately estimated. A numerical analysis has been made upon the famous heat transfer experiment by Coberly and Marshall(1951), and some suggestion is given on the basis of the inherent problem exposure.
Keywordsfixed—bed reactor heat transfer parameter one—dimensional model two—dimensional model parameter estimation     
Received 1997-01-15;
引用本文:   
程振民,袁渭康.一个大范围适用的固定床传热参数估计方法[J].  化学工业与工程, 1997,14(1): 3-8
Cheng Zhenmin Yuan Weikang .An Extensively Applicable Method for the Evaluation of Heat Transfer Parameters of a Fixed—Bed Reactor[J].  Chemcial Industry and Engineering, 1997,14(1): 3-8
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