矿用通风服环境与服装参数对人体热舒适的影响研究

Investigation of the impact of underground mine ventilation environment and clothing parameters on human thermal comfort

为了提高矿用通风服的降温效果,探究矿用通风服衣内空间参数与服装宽松度对人体舒适度的影响,结合人体着装通风服在静止状态下的结构特征分析三种矿用通风服微空间风速及温度分布,以探寻降温性能最佳管路结构。设计宽度维度分别为110 cm、118 cm、126 cm(S码、M码、L码)的矿用通风服,探讨在不同运动速度时不同宽松度下的矿用通风服微空间气流变化和温度分布,并根据微空间参数评估静止时三种管路结构、运动时最佳管路结构在不同宽松度下的矿用通风服微空间局部热舒适。结果表明:螺旋型通风服的衣下微空间风速分配均匀,降温效果最佳;服装宽松度对微空间温度的影响较显著,通过预计平均热感觉指数(Predicted Mean Vote,PMV)计算评估衣内微空间局部区域热感觉,螺旋型M码矿用通风服舒适感最佳。

To improve the cooling efficiency of mining ventilation clothing,our goal is to examine how spatial parameters and the looseness of the clothing affect human comfort.Our objective is to analyze the structural characteristics of the human body wearing ventilated clothing under static conditions,including factors such as micro-space wind speed,size,and temperature distribution.Through this analysis,we aim to evaluate three types of mining ventilation clothing in order to determine the optimal design for cooling performance.The model serves as the foundation for developing 110 cm,118 cm,and 126 cm(S,M,and L sizes)mining ventilation suits while keeping the piping structure and size unchanged.This research delves into the airflow fluctuations and temperature dispersion within the confined space of mining ventilation suits with varying degrees of looseness at different movement velocities.Furthermore,this study assesses the parameters of the confined space for three different piping structures in a static state and determines the optimal piping structure during movement with different levels of looseness at varying speeds.Additionally,the research evaluates the local thermal comfort within the micro-environment of the mining ventilation suit while considering the micro-environment parameters at different degrees of looseness.The findings of the study demonstrate that in a stationary state,the spiral-type ventilation system ensures a uniform distribution of wind speed within the confined space,leading to an optimal cooling effect.During human body movement,heat generated inside the suit is dissipated to the external environment.The movement of the human body enhances gas flow within the microclimate zone,and the wind speed in localized micro-space areas does not exhibit an inverse correlation with temperature.The looseness of clothing has a notable influence on microclimate temperature.By employing the Predicted Mean Vote(PMV)thermal comfort calculation to assess the thermal sensation within a particular section of the suit,it has been determined that the Spiral M code mining ventilation suit provides the highest level of comfort.