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高温矿井巷道与风流间同时存在显热交换与潜热交换。相对于显热交换量,潜热交换量计算参数难以获得,致使巷道表面热湿交换量计算过程繁琐。为简化计算,对巷道热湿交换体系内显热、潜热交换与表面温度、空气状态温湿度的关系进行分析,通过饱和水蒸气分压力与温度的关系引入Lewis关系,将对流质交换系数用对流换热系数的函数关系表示,饱和水蒸气分压力用温度的函数关系表示,进而将潜热交换量表示成对流换热系数、壁面温度及风流状态露点温度的函数,将对流显热交换量与潜热交换量的计算有机结合;并针对高温矿井的客观条件,对潜热交换量计算式进行了适度的简化与误差修正,得出了精度满足工程计算要求的潜热及全热量简化计算式。同时分析了不同情况下全热简化计算式计算出的净热交换量的传递趋向,明确了不同矿井巷道表面温度及风流温度下,巷道表面水分蒸发需热量的取向。
There are both sensible heat exchange and latent heat exchange between high temperature mine roadway and romantic flow. Relative to the sensible heat exchange capacity, latent heat exchange calculation parameters is difficult to obtain, resulting in road surface heat and moisture exchange volume calculation process cumbersome. In order to simplify the calculation, the relationship between sensible heat and latent heat exchange in surface heat and moisture exchange system and the temperature and humidity of surface air and air is analyzed. The Lewis relationship is introduced by the relationship between partial pressure and temperature of saturated water vapor. The function of heat transfer coefficient shows that the partial pressure of saturated steam is expressed as a function of temperature, and the latent heat exchange is expressed as a function of convective heat transfer coefficient, wall temperature and dew point temperature of the airflow state, In the light of the objective conditions of high-temperature mines, the calculation formula of latent heat exchange is simplified and error corrected. The simplified latent heat and total caloric calculation formula which meet the requirements of engineering calculation are obtained. At the same time, the transfer tendency of the net heat exchange quantity calculated by the total heat reduction calculation under different conditions is analyzed. The orientation of the heat required for water evaporation on the surface of the roadway is clarified under different mine surface temperature and air temperature.