Thermal turbo compressors are turbo machines which concentrate a compressible gas with the help of dynamic principles.
In doing so the gas continuously enters the rotating impeller. Mechanical shaft power is transferred to the fluid with the help of the blades and resulting in a significant pressure and temperature increase. The remaining kinetic flow energy is afterwards mostly converted into pressure in the diffusor. The compressed gas is then either collected in a volute or transferred to a second compressor stage with the help of a return channel. In Figure 1, the components of a one-stage, centrifugal turbo compressor are shown, where Figure 2 shows the close-up of an impeller including blades.
In general, different types of turbo compressors can be defined based on their design:
The following figures illustrate the different compressors-types:
The capability of a turbo compressor is best illustrated in a compressor performance and a power map (see Figures 6 and 7), where the pressure ratio (outlet pressure p2 to inlet pressure p1) versus the mass flow at a constant speed n is shown. Dots with the same efficiency η on different characteristic curves are joined to provide efficiency curves. In general, the compressor map is defined by the maximum speed of the compressor (to the right) and by the surge line (to the left). Surging is defined as the unpreventable aerodynamic instability. Operating the compressor left of the surge line is not allowed. The performance of the Celeroton products is presented in this visual form and to see more specific details please view the product datasheet.
The pros and cons of a turbo compressor can be summarised as follows:
Advantages of turbo compressors
Disadvantages of turbo compressors
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