Anti-corrosion liquid under the pump frequency energy saving talk

1, energy-saving inverter

From the fluid mechanics, P (power) = Q (flow) ╳ H (pressure), the flow Q and the rotational speed N is proportional to the first power, pressure H and the rotational speed of the square is proportional to N, the power P and the rotational speed of the cube is proportional to N , If the efficiency of the pump is constant, when the demand for adjusting the flow rate decreases, the rotational speed N can be decreased proportionally, while the axial output power P has a cubic relationship decreasing. That is, the power consumption of the pump motor and the rotational speed of the approximate square ratio relationship. For example: a pump motor power 55KW, when the speed dropped to 4/5 of the original speed, the power consumption of 28.16KW, saving 48.8%, when the speed dropped to the original speed of 1/2, the power consumption The amount is 6.875KW, saving 87.5%.

2, power factor compensation energy saving

Reactive power not only increases the line loss and the heating of the equipment, but more importantly, the reduction of the power factor leads to the reduction of the active power of the power grid. A large amount of reactive energy is consumed in the circuit, and the use efficiency of the equipment is low and the waste is serious. The formula P = S ╳COSФ, Q = S╳SINФ, among them S-apparent power, P-active power, Q-reactive power and COSФ-power factor. It can be seen that the larger COSФ and the larger active power P, the power factor of common pump motor is 0.6-0.7, the use of frequency control device, due to the role of inverter internal filter capacitor, COSФ ≈ 1, thus reducing the reactive power loss and increase the active power grid.

Anti-corrosion liquid under the pump frequency energy saving talk

3, soft start energy saving

Since the motor is started directly or Y / D is on, the starting current is equal to (4-7) times the rated current, which can have a serious impact on the electromechanical equipment and the supply network, but also on the grid capacity too much, Large current and vibration damage to the baffle and valve great, the equipment, the life of the pipeline is extremely unfavorable. The use of inverter energy-saving device, the use of inverter soft-start function will start the current from zero, the maximum does not exceed the rated current, reducing the impact on the power grid and the power supply requirements, extending the use of equipment and valves life. Save the equipment maintenance costs.

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