Aerzen Presents the First Rotary Lobe Compressor

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A 3+3 twisted rotor profile is used for low pressures up to 800 mbar (12 psi) whereas a 3+4 rotor profile is used for pressures up to 1500 mbar (22 psi): a compressor with optimum efficiency can be selected for the needed pressure range.

Optimized fluidic design of inlet and discharge ports provides for ideal flow conditions and reduced slippage. The inlet air is sucked in on the cold side of the package and discharge silencer isolation helps maintaining a low inlet temperature, therefore increasing the compression efficiency. Moreover, the belt-driven Delta Hybrid offers the significant advantage of exact sizing the greatest advantage comes from the energy that does not need to be used. In other words, a 5% excess in volume flow corresponds to a 5% higher energy use.

Thus the new Delta Hybrid-series is energetically absolutely comparable with turbo compressors, and moreover offers the key advantages of a Positive Displacement machine, such its considerable adaptability to varied operating conditions (see box).

Reliable and long-living

Similar to its predecessor, the Delta Hybrid stands out for its outstanding reliability and long life cycle. In wide-ranging research, Aerzen developed new seal solutions at the drive shaft and at the rotor chamber to minimize the natural wear. A new Aerzen patented bearing system extends the bearing life to over Lh10 = 60,000 operating hours (at a differential pressure of 1000 mbar (15 psi).

As in previous generations, the Delta Hybrid features a purely reactive discharge silencer. Since absorption material breaks down over time, Aerzen has avoided its use to prevent contaminating the downstream process system. This avoids any accumulation of broken-down absorption material in the fine diffuser systems of wastewater treatment plants, therefore preventing clogging, high cleaning costs and possibly reducing plant operating capacity.

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