附加相变微胶囊多孔织物热湿传递模型研究

为了考察附加相变微胶囊对织物内热湿传递的影响,发展了一个新的含有相变材料的织物热湿耦合模型.模型考虑了相交区间对相变及传热过程的影响及加热/冷却率对相变材料特征温度和相变热的影响,同时也考虑到纤维对蒸气的吸附/解吸现象引起的热湿耦合作用.使用等效热容法对相变微胶囊的相变过程进行了模拟,并用控制体积法对方程进行了离散求解.计算结果与实验观测一致,表明该模型可以用来预测含有相变微胶囊织物内的热湿传递过程.

A model of heat and moisture transfer in porous textiles with microencapsulated phase change materials

In order to investigate the effect of microencapsulated phase change materials (MCPCM) on heat and moisture transfer in porous textiles, a new model of simultaneous transport in textiles with MCPCM was developed. In this model the effects of phase transition temperature range on phase change processes and heat transfer, and the effects of heating/cooling rate on characteristic temperature and latent heat of the phase change materials (PCM) were considered. Heat and moisture transfer in textiles was considered as a coupled process by fiber moisture sorption/desorption. Meanwhile, the apparent heat capacity method was used to deal with the simulation of phase transition process, and the finite volume method was utilized to solve the governing equations. The computational results were consistent with experimental observations, indicating that the model is able to predict the temperature changes during heat and moisture transfer in porous textiles with MCPCM.