Basic knowledge of air system

Basic knowledge of air system

Compressed air system ━ and power-hungry

In the United States, according to the U.S. department of energy (doe), air compressor is one of the largest power consumption equipment in the industry. Although the U.S. department of energy was once thought that the motor is one of the most power-hungry devices, improve the compressed air system design and operation of energy saving more than motor efficiency of energy saving.

By improving the compressed air system design and operation of the energy saving 20-50%. Many businesses will compressed air as the equivalent of coal, electricity, water supplies. It is different from other things, very few people know the cost per cubic meter/min of compressed air.

Cost per cubic meter/min of compressed air

Can be obtained through the calculation of the following,

Assume that:

Coefficient of motor service = 110%

Power factor = 0.9

A typical air compressor, each 1 HP can produce 4 CFM

1 HP = 110% x0.746 kW / 0.9 = 0.912 kW

, so produce 1 CFM compressed air to 0.228 kW

If electricity is 0.65 yuan per watt: 1 CFM = 0.1482 yuan/hour

1 m3 / min = 35.315 CFM

So 1 cubic meters/min = 5.23 yuan/hour

, so a 10 cubic meters/min air compressor to run 8000 hours of electricity: 10 x 8000 x 5.23 = RMB 418694

Where can I save your electricity bills?

In a typical factory, compressed air leakage accounted for 20% of total demand.

Assume that a compressed air system of the factory

Run 8000 hours each year

Electricity charges $0.65 per watt

Line pressure = 7.0 KGF/cm2

Factory gas: 10 cubic meters per minute

Pipeline leak: 20% : 2 cubic meters per minute

Total air demand: 12 cubic meters per minute

The electricity of compressed air

10 x $5.23 = $418694 x 8000 hours

2 x 8000 hours x $5.23 = RMB 83738

Amounted to 502433 yuan

2 additional load force of leak also produce enough air compressor to run at the same time.

No spare machine,

Maintain, not to any one

Under pressure from 7.0 KGF/cm2 2 m3 / needed by the leakage of air leakage points:

3 3 mm leakage points: 2.2 cubic meters/min, or

1, 6 mm leak: 2.832 cubic meters/min