Entransy dissipation minimization for generalized heat exchange processes  

作　　者：XIA ShaoJun 

机构地区：[1]Institute of Thermal Science and Power Engineering,Naval University of Engineering,Wuhan 430033,China [2]Military Key Laboratory for Naval Ship Power Engineering,Naval University of Engineering,Wuhan 430033,China [3]College of Power Engineering,Naval University of Engineering,Wuhan 430033,China

出　　处：《Science China(Technological Sciences)》2016年第10期1507-1516,共10页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51576207,51356001&51579244)

摘　　要：This paper investigates the MED （Minimum Entransy Dissipation） optimization of heat transfer processes with the generalized heat transfer law q ∝ （A（T^n））m. For the fixed amount of heat transfer, the optimal temperature paths for the MED are obtained The results show that the strategy of the MED with generalized convective law q ∝ （△T）^m is that the temperature difference keeps constant, which is in accordance with the famous temperature-difference-field uniformity principle, while the strategy of the MED with linear phenomenological law q ∝ A（T^-1） is that the temperature ratio keeps constant. For special cases with Dulong-Petit law q ∝ （△T）^1.25 and an imaginary complex law q ∝ （△（T^4））^1.25, numerical examples are provided and further compared with the strategies of the MEG （Minimum Entropy Generation）, CHF （Constant Heat Flux） and CRT （Constant Reservoir Temperature） operations. Besides, influences of the change of the heat transfer amount on the optimization results with various heat resistance models are discussed in detail.

关 键 词：entransy theory finite time thermodynamics heat exchange process optimal temperature path generalized heattransfer law generalized thermodynamic optimization 

分 类 号：TQ052[化学工程] O175.27[理学—数学]