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How DENAIR centrifugal compressors work

DENAIR centrifugal compressor is designed as a type of dynamic compressor, or we call it as turbocompressor. It is not like positive displacement compressors that work at a constant flow, centrifugal compressors work at a constant pressure and the performance is affected by external conditions such as changes in inlet temperatures.

How centrifugal compressors work

So, how does DENAIR centrifugal compressor work?

Air is drawn into the center of a rotating impeller with radial blades and is pushed toward the center by centrifugal force. This radial movement of air results in a pressure rise and the generation of kinetic energy. Before the air is led into the center of the impeller, the kinetic energy is also converted into pressure by passing through a diffuser and volute.

Each stage takes up a part of the overall pressure rise of the compressor unit. Depending on the pressure required for the application, a number of stages can be arranged in a series to achieve a higher pressure. This type of multi-stage centrifugal compressor application is often used in the oil and gas and process industries. Alternately, in wastewater treatment plants, low pressure, single-stage applications are used to achieve the desired pressure ratio.

In modern configurations of centrifugal air compressors, ultra-high speed electric motors are used to drive the impellers. This results in a compact compressor without a gearbox and associated oil-lubrication system, thus making it oil-free and appropriate for applications that require 100 percent oil-free air.

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