直接蒸发冷却在回转窑工艺段通风降温气流组织模拟研究  

Simulation study on the Microstructure of Ventilation Cooling Airflow in the Process Section of Rotary Kiln by Direct Evaporative Cooling

作　　者：翁磊超 孙铁柱 马杰 Weng Leichao;Sun Tiezhu;Ma Jie(School of Urban Planning and Municipal Engineering,Xi’an Polytechnic University,Xi’an,710048)

机构地区：[1]西安工程大学城市规划与市政工程学院,西安710600

出　　处：《制冷与空调（四川）》2023年第4期546-555,共10页Refrigeration and Air Conditioning

摘　　要：为了在冬季工况下合理利用直接蒸发冷却设备对回转窑工艺段的工作区进行通风降温,基于Fluent软件对回转窑工艺段的气流组织进行了的模拟研究,并通过实际案例测试验证了模型的准确性。在分析不同送风量下直接蒸发冷却设备的模拟中,结果显示在5000至50000m^(3)/h的送风量范围内,回转窑工艺段的气流组织受到不同程度的影响。较小的送风量下,热源表面会形成向上的高温羽流。然而,增加送风量可以减弱这种羽流现象,并显著降低工作区的温度。高温热源对送风口的速度流场产生影响,导致冷空气偏转流向上方的非工作区域。随着送风量的增加,速度流场中的涡流现象更加明显。然而,当送风量超过25000m^(3)/h后,通风效率的增长速度变缓,进一步增加送风量所获得的通风效率增加率不大。In order to rationally use the direct evaporative cooling equipment to ventilate and cool the working area of the rotary kiln process section under winter working conditions,Fluent software was used to simulate the process section of the rotary kiln by using Fluent software,and the accuracy of the model was verified by actual case tests.In the simulation of direct evaporative cooling equipment under different supply air volumes,the results show that the airflow structure of the rotary kiln process section is affected to varying degrees in the range of 5000 to 50000m^(3)/h of supply air.With a small supply volume,an upward high temperature plume forms on the surface of the heat source.However,increasing the supply air volume can attenuate this plume phenomenon and significantly reduce the temperature of the work area.The high-temperature heat source has an effect on the velocity flow field of the air supply port,causing the cold air to deflect and flow to the non-working area above.With the increase of the supply air volume,the vortex phenomenon in the velocity flow field becomes more obvious.However,when the air supply volume exceeds 25000m^(3)/h,the growth rate of ventilation efficiency slows down,and the ventilation efficiency increase rate obtained by further increasing the air supply volume is not large.

关 键 词：工业厂房 高温热源 气流组织 送风量 通风效率 

分 类 号：TU831.4[建筑科学—供热、供燃气、通风及空调工程]