Scroll machine and screw machine have their own advantages and applicable scenarios, and it is impossible to simply say which one is better. Here are some comparisons of them:
Efficiency-wise: Screw machines usually have high efficiency, especially under high loads and continuous operation. Scroll machines, on the other hand, may be more energy-efficient under partial load and intermittent operation. This is because the scroll machine is designed so that it has a higher efficiency at part load and can operate at lower speeds. However, at full load and high speeds, the efficiency of the scroll machine may decrease because of the increased leakage and friction losses inside it. The screw machine, on the other hand, is designed to provide high volumetric and thermal efficiency during compression.
Applications: Due to its high efficiency and smooth operation characteristics, screw machines are usually suitable for industrial applications that require continuous, high-load operation, such as manufacturing, electric power, and chemical industries. Scroll machines are more suitable for partial-load and intermittent applications, such as small factories, laboratories or offices. In addition, the scroll machine can produce gas without oil, which greatly improves the quality of compressed air, so it may be more popular in some occasions with high air quality requirements.
Stability: The stability of the screw air compressor and the scroll air compressor are good, and the failure rate is low. However, due to fewer moving parts, the scroll air compressor has less wear and tear during long-term operation, and the service life may be longer. In addition, scroll air compressors are usually less noisy because they operate at a lower speed.
In terms of floor space: the scroll air compressor has a small footprint due to its small gas production, the small volume of the equipment itself, and the internal space can be set more compactly, so it occupies a small area. This can be an advantage for applications where space is limited.
In summary, the choice between scroll and screw depends on the specific application needs and scenarios. If continuous, high-load operation is required and air quality requirements are not high, a screw machine may be more suitable; If intermittent operation is required, air quality requirements are high, or space is limited, a scroll machine may be an advantage. When choosing, you also need to consider factors such as the acquisition cost of the equipment, the cost of maintenance, and the cost of operation.