针对有热源情况下大空间厂房内两种送风方式的对比研究

A comparative study of two air supply modes in large space workshop with heat source

通过数值模拟的方法对比研究机械通风(mechanical ventilation,MV)与自然通风(natural ventilation,NV)有室内发热源的情况下,室内热环境的动态变化特征。结果表明,在有热源情况下,室内房间会在高度方向形成明显的热力分层现象,从而导致工作台位置温度较高,降低人体热舒适性。MV和NV房间内,靠近进风百叶位置处的热环境明显优于室内其他位置的热环境。另外,无论是机械通风还是自然通风,在室内局部位置均存在气流死角,导致局部环境恶化,温度过高,不利于设备散热。

The numerical simulation method is used to compare the dynamic changes of the indoor thermal environment in the case of mechanical ventilation(MV)and natural ventilation(NV)with indoor heating sources.The results show that in the case of a heat source,the indoor room will form a significant thermal stratification in the height direction,resulting in a higher temperature of the table position,reducing the thermal comfort of the human body.In the MV and NV rooms,the thermal environment near the inlet louver is significantly better than the thermal environment elsewhere.In addition,whether mechanical ventilation or natural ventilation,there is a dead angle of air flow in the local location of the room,which leads to the deterioration of the local environment,high temperature,and is not conducive to the heat dissipation of the equipment.