对显热比变化规律的理论分析

Theoretical Analysis of the Variation Pattern of Sensible Heat Factor

对矿井风流热交换计算常用的参数之一即显热比的变化规律进行了理论分析。定量分析了显热比与通风时间 (巷道壁面温度 )、巷道壁面的湿度系数、风流的相对湿度等参数之间的关系。通风开始后 ,壁面温度随着暴露时间的增长而降低 ,显热比也随通风时间增长而降低。显热比随巷道壁面湿度系数的增加而下降 ;随着风流相对湿度的增加 。

Variation pattern of sensible heat factor, which is one of the most widely used parameters as calculating the thermal environment of a roadway, is analyzed and illustrated theoretically. The sensible heat factor decreases with the increase of ventilation time after the rock surface is exposed due to the decrease of the surface temperature of the rock. The sensible heat factor increases with the enhancement of the relative humidity of airflow and decreases with the increase of the wetness factor of the rock surface.