基于分形理论的纳米颗粒多孔介质真空导热特性

doi:10.3969/j.issn.0438-1157.2013.11.017

化工学报 ›› 2013, Vol. 64 ›› Issue (11): 4008-4014.DOI: 10.3969/j.issn.0438-1157.2013.11.017

基于分形理论的纳米颗粒多孔介质真空导热特性

阚安康, 张婷婷, 曹丹

上海海事大学商船学院, 上海 201306

收稿日期:2013-04-04 修回日期:2013-07-29 出版日期:2013-11-05 发布日期:2013-11-05
通讯作者: 阚安康
作者简介:阚安康(1981-),男,博士,工程师。
基金资助:
上海海事大学科技基金项目(20120091)。

Vacuum thermal conduction characteristic of nano-granule porous medium using fractal theory

KAN Ankang, ZHANG Tingting, CAO Dan

Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China

Received:2013-04-04 Revised:2013-07-29 Online:2013-11-05 Published:2013-11-05
Supported by:
supported by the Science and Technology Foundation of Shanghai Maritime University(20120091).

摘要/Abstract

摘要： 采用分形理论,描述了纳米颗粒多孔介质材料的微尺度空间结构,建立了分形等效单元体模型,分析了影响其真空下有效热导率关键因素为固体基质热导率、填充率、分形维数、分形直径、残余气体压力及热导率等,并导出了气相、固相热传导计算公式和热辐射等效热导率计算公式及多孔介质材料总有效热导率计算公式。研究表明,纳米颗粒有效热导率随着分形直径、残余气体压力的增大而增大,并给出了纳米颗粒多孔介质材料作为真空材料的最佳直径。同时,模型计算值与实验测量值比较,具有较好的一致性。该理论分析方法对新型真空绝热材料的研制和绝热性能的提高具有实用价值。

关键词: 分形理论, 纳米颗粒多孔介质, 真空绝热, 热导率

Abstract: Based on the fractal theory,the micro-scale geometric structure of nano-granule porous medium was illustrated and the equivalent fractal unit model was proposed.The effective thermal conductivity of the nano-granule porous medium under the vacuum condition has some relation with the thermal conductivity of solid substrate,vacancy porosity,fractal dimension,fractal diameter,pressure and thermal conductivity of rarefied air,and environmental condition.The calculation models for thermal conductivities of air phase and solid phase,the equivalent thermal radiation and the total effective thermal conduction were constructed.The results show that the effective thermal conductivity of nano-granule porous medium increases with the increase of fractal diameter and rarefied air pressure within the material,but decreases with the increase of vacancy porosity.The optional diameter of the nano-granule is recommended.The calculated results are in good agreement with the experimental data.The study is useful for enhancing the adiabatic performance of nano-granule porous medium and developing new vacuum adiabatic materials.

Key words: fractal theory, nano-granule porous medium, vacuum insulation, thermal conductivity

中图分类号:

TK121

阚安康, 张婷婷, 曹丹. 基于分形理论的纳米颗粒多孔介质真空导热特性[J]. 化工学报, 2013, 64(11): 4008-4014.

KAN Ankang, ZHANG Tingting, CAO Dan. Vacuum thermal conduction characteristic of nano-granule porous medium using fractal theory[J]. CIESC Journal, 2013, 64(11): 4008-4014.

参考文献 20

[1]	Ji Jun(纪珺),Han Houde(韩厚德),Kan Ankang(阚安康).Thermal property of vacuum insulated panels and their application to refrigerated containers[J].Journal of Chemical Industry and Engineering(China)(化工学报),2008,59(2):114-118
[2]	Fan L W,Hu Y C,Tian T,Yu Z T.The prediction of effective thermal conductivities perpendicular to the fibers of wood using a fractal model and an improved transient measurement technique[J].International Journal of Heat and Mass Transfer,2006,49(21/22):4116-4123
[3]	Turias I J,Gutierrez J M,Galindo P L.Modeling the effective thermal conductivity of a unidirectional composite by the use of artificial neural networks[J].Composites Science and Technology,2005,65(3/4):609-619
[4]	Kwon Jae-Sung,Jang Choong Hyo,Jung Haeyong,Song Tae-Ho.Effective thermal conductivity of various filling materials for vacuum insulation panels[J].International Journal of Heat and Mass Transfer,2009,52:5525-5532
[5]	Wang Moran,He Jihuan,Yu Jianyong,Pan Ning.Lattice Boltzmann modeling of the effective thermal conductivity for fibrous materials[J].International Journal of Thermal Sciences,2007,46:848-855
[6]	Wang J,Wang M,Li Z.A lattice Boltzmann algorithm for fluid-solid conjugate heat transfer[J].International Journal of Thermal Sciences,2007,46(9):848-855
[7]	Wang M,Pan N.Modeling and prediction of the effective thermal conductivity of random open-cell porous foams[J].International Journal of Heat and Mass Transfer,2008,51(5/6):1325-1331
[8]	Kan Ankang(阚安康),Han Houde(韩厚德),Tang Wei(汤伟).Research on effective thermal conductivity for open-cell polyurethane foam using fractal theory[J].Materials Review(材料导报),2012,26(2):143-146
[9]	Pitchumani R,Yao S C.Correlation of thermal conductivities of unidirectional fibrous composites using local fractal techniques[J].Journal of Heat Transfer,1991,121(1):788-796
[10]	Pitchumani R.Evaluation of thermal conductivities of disordered composite media using a fractal model[J].Journal of Heat Transfer,1991,121(2):163-166
[11]	Yu B M,Li J H.Some fractal characters of porous media Fractal[J].Porous Media,2001,9(3):365-372
[12]	Yu B M.Comments on "Reexamination of correlations for nucleate site distribution on boiling surface by fractal theory[J].Journal of Thermal Science,2002,11(4):383-384
[13]	Zhang Donghui(张东辉),Yang Hao(杨浩),Shi Mingheng(施明恒).Important problems of fractal model in porous media[J].Journal of Southeast University:Natural Science Edition(东南大学学报:自然科学版),2002,32(5):692-697
[14]	Dathe A,Thullner M.The relationship between fractal properties of solid matrix and pore space in porous media[J].Geoderma,2005,129:279-290
[15]	Ma Y T,Yu B M,Zhang D M,et al.A self-similarity model for effective thermal conductivity of porous media[J].Journal of Physics D,2003,36:2157-2164
[16]	Zhao Xiaotong(赵晓彤),Yang Shanrang(杨善让),Xu Zhiming(徐志明).A fractal model for thermal conductivity in disperse system of even pellets[J].Journal of Engineering Thermo Physics(工程热物理学报),1999,20(4):477-481
[17]	Fricke J,Schwab H,Heinemann U.Vacuum insulation panel-exciting thermal properties and most challenging applications[J].International Journal of Thermophysics,2006,27:1123-1139
[18]	Di Xiaobo(邸小波),Bao Chonggao(鲍崇高),Gao Yimin(高义民),et al.On the relationship between thermal conductivity and vacuum of vacuum insulation panels[J].Vacuum(真空),2011,48(3):12-15
[19]	Yoon I S,Song T H.Thermal conductance of multiple vacuum plate layer[J].Thermal Science Engineering,2005,13:29-32
[20]	Fricke J,Heinemann U,Ebert H P.Vacuum insulation panels-from research to market[J].Vacuum,2008,82(7):680-690

基于分形理论的纳米颗粒多孔介质真空导热特性

Vacuum thermal conduction characteristic of nano-granule porous medium using fractal theory

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