In the energy conservation comparison between oil-free screw blowers and Roots blowers, oil-free screw blowers are generally considered to be more energy efficient. The following is a comparative analysis of energy conservation between the two:

1. Energy-saving principle
Oil-free screw blower: using the working principle of internal compression, through the rotation of the screw rotor to achieve gas compression, compression efficiency is higher.
Roots blower: Adopts the principle of constant volume compression, relying on the back pressure of the pipe network to complete the compression process, and the efficiency is relatively low.

2. Energy saving data
Oil-free screw blower: under the same air volume and pressure conditions, the energy consumption of oil-free screw blower is about 25%-35% lower than that of Roots blower. At higher pressures (e.g. 0.8bar), the energy savings are even more significant.
Roots blower: Although some energy saving effects can be improved through technology such as frequency conversion speed regulation, the overall energy consumption is still higher than that of oil-free screw blowers.

3. Comparison of practical applications
In application scenarios such as sewage treatment plants, the energy-saving advantages of oil-free screw blowers are more obvious. For example, after the use of oil-free screw blower in a sewage treatment plant, the energy saving effect is remarkable, and the energy consumption is greatly reduced.
Roots blowers still have certain advantages in low pressure applications, but in medium and high pressure applications, the problem of high energy consumption is more prominent.

4. Other advantages
Oil-free screw blower: In addition to energy saving, it also has the characteristics of low noise, no oil pollution and smooth operation.
Roots blower: Although it is still widely used in some specific processes, its high energy consumption, high noise and regular maintenance characteristics make it gradually less competitive in modern industry.

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