Weak current College】 【fan performance of main parameters?.

<br> <br> Flow <br> ① mass flow: qm, unit time flows through the gas quality, the fan unit: kg / s. <br> ② volume flow: qvsg1, unit time through blower inlet flange at the gas .volume. Commonly used unit: m3 / s, m3/min, m3 / h. <br> Pressure <br> Fan pressure refers to the gas pressure inside the fan going high value, or a fan of gas pressure and export Department. Units .for Pa, other units have: mmH2O, mBar, mmHg, etc. It has a dynamic pressure and static pressure, full pressure. <br> ① fan pressure: export of stagnation pressure fan and blower inlet pressure difference of stagnation, the unit volume .of gas obtained by fans after the total energy <br> ③. static pressure blower fan: minus used Mach coefficient fixed ventilator dynamic pressure. <br> Power <br> ①. the fan unit mass power unit by fan quality fluid energy increases. .<br> ②. blower unit quality static var <br> ③. blower air power: mass flow and fan unit mass of a product, or import volume flow, compression correction coefficient kP and the product of fan pressure. <br> ④. .static air blower power: mass flow and fan unit quality product of static var, or import volume flow, compression correction factor kPs and fan product of static pressure <br> ⑤. impeller power: supply of mechanical power fan impeller. <br> ⑥ .. fan shaft power supply fan: axis of mechanical power. <br> ⑦. motor output power: motor or other prime mover of the output shaft power. <br> ⑧. motor input power: motor drive device terminals on the supply of electric .power. <br> <br> Efficiency <br> <br> ①. the fan impeller efficiency: air power and divided by the blower impeller power. <br> <br> ②. fan impeller static static efficiency: fan and air power .divided by the impeller power. <br> <br> ③. fan shaft efficiency: fan air power and divided by the blower shaft power. <br> <br> ④. blower motor efficiency: air power and divided by the blower motor output .power. <br> <br> ⑤. total efficiency: air power and divided by the blower motor input power. <br> <br> <br> <br> <br>.