织物含尘量对其热湿传递性能的影响

在高粉尘环境下,粉尘颗粒易附着或嵌入织物,引起织物热湿传递性能变化。选用10种纯棉织物,模拟煤矿井下作业环境制备含尘量稳定的织物,测试织物的含尘量及其含尘前后的热湿传递性能。发现含尘后织物的透气率和芯吸高度下降,传热系数提高。在此基础上,研究含尘量与织物结构参数的关系并分析150 s吸附时间内含尘量与热湿传递性能指标的变化趋势。结果显示,织物面密度与含尘量呈显著正相关;随吸附时间增加,织物的含尘量逐渐增加并趋于稳定,透气率不断下降,传热系数持续增加,芯吸高度逐渐减小。

Influence of dust content in fabric on its heat-moisture transmission

In high dust environments, dust particles easily adhere or embed on/in the fabric causing the fabric heat-moisture transmission changes. Ten kinds of cotton fabrics were selected and the coal mine environments were simulated to prepare dusty fabrics. Dust content and heat-moisture transmission of clean and dusty fabrics were tested. The results showed that ventilation rate and wicking height of dusty fabrics were lower, and heat transfer coefficients of dusty fabrics were higher.On this basis, the relationship between dust content and fabric structure parameters as well as the change rules of dust content , ventilation rate,heat transfer coefficients and wicking height in the adsorption process of 150s were investigated.The results reveal that surface density was significantly positively related to dust content; and with the increase of adsorption time, fabric dust content was increasing and tending to be stable,ventilation rate and wicking height were declining, and heat transfer coefficients was increasing and maintained constant eventually.