Screw versus lobe / Technology comparison / Technology comparison
Technology comparison
Energy losses by lobe technology
4
-> 1: Suction.
Air enters the compression chamber. The air volume remains constant while the lobe rotors turn.
1
-> 2: External compression.
The air is compressed externally due to back-pressure of the connected pipeline.
2
-> 3: Discharge.
Air is pushed out into the pipeline.
As shown in the Pressure/Volume diagram, the compression work is represented by the blue area and is proportional to the energy
- Click here to see the compression principle of a lobe element
Energy savings by screw technology
4 ->
1: Suction.
Air enters the compression chamber.
1 -> 2: Internal compression.
As the rotors move towards each other, the air volume decreases.
2
-> 3: Discharge.
Air is pushed out into the pipeline.
As shown in the Pressure/Volume diagram, the compression work is represented by the blue area and is proportional to the energy consumed. The green area represents energy savings of a screw blower compared to a traditional ‘Roots’ type rotary lobe blower. This is due to the internal compression.
The ZS screw blower is on average
30% more energy efficient
compared to a traditional ‘Roots’ type lobe blower.
- Click here to see the compression principle of a screw element
