组合式空冷器风量需求规律

Air demand of combined air coolers

推导了组合式空冷器所需风量与总热负荷、环境温湿度及热流体交界温度的多公式关联的隐函数关系.取1 000个有实际意义的工况点,拟合了需风量与各变量之间的显函数公式.结果表明:需风量随热负荷线性增加,随环境湿度线性增加;环境温度25℃以上时,需风量随环境温度增减的幅度较大,环境温度10℃以下时,需风量随环境温度增减的幅度较小;热流体交界温度越高,需风量越小.拟合公式反映了各因素影响下的风量需求规律.

The implicit functional relation of air quantity of the combined air cooler with total heat load,surrounding air temperature and humidity,and the junctional temperature of hot fluid between finned coils and evaporative coils in the cooler was developed and analyzed.The explicit function of air demand was fitted by calculating 1 000 effective working conditions.The results show that the air demand increases linearly with total heat load,and it increases linearly with environment humidity as well.The air demand increases or decreases faster when the environment temperature is above 25 ℃,and slowly when the temperature is below 10 ℃.The higher the junction temperature of hot fluid,the smaller the air volume is required.The fitted function of air demand indicates the rules of air demand with the variables.