With the tested result of natural ventilation system in an office building in Shanghai, analyses the irrationality of using the energy utilization coefficient to evaluate natural ventilation.
根据对上海一办公楼建筑通风系统的实测，分析了能量利用系数用于评价自然通风系统运行效果的不合理性。
2
According to the theory of fluid mechanics, the equivalent network chart of air speed distribution of the rotor ventilation grooves and surface heat sinking coefficient are calculated.
同时，根据流体相似理论计算了转子通风沟内流体速度和表面散热系数，给出了该电机计算结果。
3
The standard value ofventilation resistance and coefficientof frictional resistance is very significant to the ventilation management of the mine as the basic data.