A simple method is presented to realize work point dynamic monitoring by solving the flow and the total pressure of the fan with the model and relative parameters got on the spot.

给出了一种根据现场有关实测参数，借助模型求取工作点流量和风机全压，以实现动态工作点监视的简便方法。

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According to the analysis on pressure of three kinds of duct systems, concludes that the total pressure of a fan should be equal to the resistance loss of the duct system.

通过对三种风道系统的压力进行分析，认为应根据风机全压等于风管系统阻力损失来选择风机。

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The measurements show that the airfoil blade fan prevails over the plate one in the aspects of total pressure efficiency, stable operation range and high efficient operation range.

试验结果表明机翼型叶片在全压效率、稳定运行范围及高效运行范围比相应的板型叶片具有优越性；

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