Entransy dissipation minimization for a class of one-way isothermal mass transfer processes

作     者：XIA ShaoJun CHEN LinGen SUN FengRui 

作者机构：Postgraduate School Naval University of Engineering Wuhan 430033 China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2011年第54卷第2期

页      面：352-361页

核心收录：

学科分类：081901[工学-采矿工程] 081704[工学-应用化学] 0819[工学-矿业工程] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.10905093) the Program for New Century Excellent Talents in University of China(Grant No.NCET-04-1006) the Foun-dation for the Author of National Excellent Doctoral Dissertation of China(Grant No.200136) 

主　　题：diffusive mass transfer law isothermal mass transfer entransy dissipation optimal control finite time thermodynamics 

摘      要：A class of one-way isothermal mass transfer processes with Fick’s diffusive mass transfer law[g ∝Δ(c)]is investigated in this *** on the definition of the mass entransy,the entransy dissipation function which reflects the irreversibility of mass transfer ability loss is *** optimal concentration allocations of the key components corresponding to the highand low-concentration sides for the minimum entransy dissipation of the mass transfer process are obtained by applying opti- mal control theory and compared with the strategies of the minimum entropy generation,constant mass transfer flux(constant concentration difference),and constant concentration ratio(constant chemical potential difference).The results are as follows. For the optimal mass transfer strategy of the minimum entransy dissipation,the product of the square of the key component concentration difference between the high-and the low-concentration sides and the inert component concentration at the low-concentration side is a constant,while for that of the minimum entropy generation,the ratio of the square of the key com-ponent concentration difference between the high-and the low-concentration sides to the key component concentration at the low-concentration side is a constant;when the mass transfer process is not involved in energy conversion process,the optimi-zation principle should be the minimum entransy dissipation;the mass transfer strategy of constant concentration difference is superior to that of constant concentration *** results obtained in this paper can provide some theoretical guidelines for optimal designs and operations of practical mass transfer processes.