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Anonymous users2024-02-10You don't know much about the mechanical characteristics of high-pressure fans, high-pressure fans can't adjust the wind pressure, only the air volume, and the wind pressure is determined by the load. When the speed of the fan is maintained at a certain level, the wind pressure will be small when the load is large, and the wind pressure will be large when the load is small. It is commonly known as the roots blower to be strong when it is strong, and weak when it is weak.
On the other hand, when the load is maintained with a certain amount of air, adjust the speed of the fan so that the air volume generated = the amount of air required by the load, and at this time the equilibrium relationship is reached (assuming that this is called the balance speed), but the system has no pressure. The pressure requires the fan speed to be slightly higher than the equilibrium speed, and the air volume is greater than the required air volume, and the pressure is established, but this balance relationship is very fragile, because the mechanical characteristics of the high-pressure fan are very hard.
The optimal outlet pressure is MPa. It refers to the best load pressure of the blower, and the smaller the actual load of the fan, the more stable the fan, when starting, there is still a part of the water in the pool pipeline has not been aerated to come, the starting pressure is naturally high, after normal operation, the load is reduced, the pressure drops, and the stability in MPa is the best state.
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Anonymous users2024-02-09The outlet pressure of the single-stage centrifugal fan is generally 20, 30kpa, have you been fooled? Roots blower.
It's no problem to get to 98kpa.
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Anonymous users2024-02-08Look to see if the air inlet and outlet of the fan are blocked by anything, or whether the filter screen is blocked.
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Anonymous users2024-02-07It has something to do with the ambient temperature, so it's good in the summer.
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Anonymous users2024-02-06Summary. Dear dear, it's a pleasure to answer your <>
Under normal circumstances, the pressure difference between the outlet and the inlet of the fan is the actual pressure value of the fan, which is generally within the rated value range. The power of the fan = the air volume of the fan multiplied by the actual pressure divided by the density of the gas divided by the efficiency of the fan is the shaft power of the fan. Remember to do unit conversions. <>
Ventilator working pressure and inlet and outlet pressure.
Dear, non-staring often honored to answer your <>
Under normal circumstances, the pressure difference between the outlet and the inlet of the fan is the actual pressure value of the fan, which is generally within the rated value range. The power of the fan = the air volume of the fan multiplied by the actual pressure divided by the density of the gas divided by the mu and the efficiency of the fan is the shaft power of the wind turbine. Remember to do unit conversions. <>
expand information; The ventilator is fully pressurized, and the new definition is called ventilator pressure. Fan pressure PF: The difference between the ventilator outlet stagnation pressure and the ventilator inlet pressure.
Ventilation Pressure PD2: The average dynamic pressure at the ventilator outlet, calculated from the mass flow rate, the average gas density at the outlet, and the area at the ventilator outlet. That is, the pressure due to the velocity of the fluid, which is simply calculated as:
Density * square of wind velocity 2 Fan static pressure pt2: Usually defined as the fan pressure minus the ventilation motor pressure to obtain the value of the penalty. The pressure parameters of the ventilator are mainly divided into static pressure, dynamic pressure and full pressure.
Total pressure refers to the difference between the stagnant pressure at the outlet of the ventilator and the pressure at the inlet, including dynamic pressure and static pressure. The dynamic pressure of the ventilator, calculated from the mass flow rate, the average gas density at the outlet, and the area at the ventilator outlet, is the pressure generated by the gas flow. <>
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Anonymous users2024-02-05P = V is the meaning of the outlet wind speed, unit m s
is the density of the air.
v=q (3600 outlet area s).
q is the fan air volume.
The area of the air outlet is s, in square meters.
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Anonymous users2024-02-04Calculated using the outlet velocity, the density is multiplied by the square of the velocity and divided by 2
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