Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (07): 163-168.doi: 10.13475/j.fzxb.20180605706

• Management & Information • Previous Articles     Next Articles

Numerical simulation of low temperature protection process for heat storage fabrics

CHEN Xu1, WU Bingyang2, FAN Ying1, YANG Musheng1   

  1. 1. College of Art and Design, Jiangsu University of Technology, Changzhou, Jiangsu 213001, China
    2. School of Computer Engineering, Jiangsu University of Technology, Changzhou, Jiangsu 213001, China
  • Received:2018-06-19 Revised:2019-03-29 Online:2019-07-15 Published:2019-07-25

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Abstract:

In order to improve the low temperature resistance of ordinary fabric, a phase change microcapsule with heat storage and temperature control function was coated to the surface to produce heat storage temperature fabric. The low temperature protection process of composite fabric was simulated by Fluent software. Based on this, the simulation accuracy of the model was tested by low temperature protection experiment. In addition, the influence of phase change latent heat and volume fraction of microcapsules on the low temperature protective properties of thermal storage fabrics was investigated. The numerical simulation results show the temperature field distribution and the temperature variation trend of the temperature distribution in different time nodes. The error of the test results and simulation results is less than 8.64%, which indicates that the simulation results can be adopted to restore the low temperature protection process of the heat storage fabric. The results show that when the phase change latent heat of microcapsules increases from 50 J/g to 200 J/g, the low temperature protection time of the fabric is prolonged by 70.1%. When the volume fraction of the microcapsule increases from 1% to 5%, the low temperature protection time of the fabric increases from 214 s to 388 s, prolonged by 81.3%.

Key words: heat storage fabric, low temperature protection, phase change microcapsule, numerical simulation, smart textile material

CLC Number: 

  • TB34

Fig.1

Geometrical model of heat storage fabric"

Tab.1

Thermal physical properties parameters"

材料 密度/
(g·mL-1)		 孔隙度/
%		 导热系数/
(W·K-1·m-1)		 相变
潜热/(J·g-1)
相变微胶囊 0.8 - 0.7 195
涂覆层 0.9 - 0.3 -
织物层 - 80 0.1 -

Fig.2

Results of mesh generation. (a)Results of mesh division on model surface; (b) Results of mesh division of phase-change microcapsules; (c) Results of mesh division on model side"

Tab.2

Grid quality evaluation sheet"

网格质量 优秀 很好 良好 一般 较差 很差
倾斜度 0~0.2(72.6%) 0.25~0.5(21.4%) 0.5~0.8(4.6%) 0.8~0.94(1.1%) 0.94~0.97(0.2%) 0.98~1(0.1%)
正交质量 0.9~1.0(59.5%) 0.7~0.95(28.2%) 0.2~0.69(9.7%) 0.1~0.2(2.5%) 0.001~0.1(0.1%) 0~0.001(0.0%)

Fig.3

Temperature field distribution cloud map"

Fig.4

Experimental results and simulation results curve"

Fig.5

Influence of latent heat of phase change on low temperature protection performance"

Fig.6

Influence of volume fraction on low temperature protection performance"

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