Abstract: A compressor system for generating a compressed gas having at least one main compressor to which pre-compressed gas is fed using at least one pre-compressor, wherein the at least one main compressor is driven, as is also the at least one pre-compressor, by a common drive motor or separate drives, wherein at least one pre-compressor is assigned a hydrodynamic fluid coupling for changing the drive speed of the pre-compressor.

Abstract: The invention relates to a compressor system for production of compressed air, consisting of a compressor driven by an internal combustion engine, connected by piping to compressed air discharge points and supplied with precompressed air by an exhaust turbocharger on the drive side connected on the exhaust side of the internal combustion engine.

Abstract: The invention relates to a compressor system for production of compressed air, consisting of a compressor driven by an internal combustion engine, connected by piping to compressed air discharge points and supplied with precompressed air by an exhaust turbocharger on the drive side connected on the exhaust side of the internal combustion engine.

Abstract: A process for compressing a gaseous medium, particularly air, in which sucked in gas of a lower initial pressure, particularly atmospheric pressure, is compressed to a predetermined final pressure by means of a compressor driven by the useful side of a thermal engine. The sucked in gas is pre-compressed before entering the compressor and/or the compressed gas is re-compressed after exiting the compressor by a turbocharger. The drive side of the turbocharger is acted upon by the energy of the exhaust gas flow of the thermal engine. In order to increase the overall efficiency of transportable compressor installations in particular, a liquid of a closed or open liquid/steam circulation system, which liquid is under pressure, is evaporated and superheated by the exhaust gas flow of the thermal engine and the superheated steam is fed to the drive side of the turbocharger.

Abstract: A compressor arrangement for producing compressed air includes a compressor connected through a line to devices using the compressed gas and a supercharger driven by the exhaust of a heat engine. In order to improve the overall efficiency of the arrangement, the compressor is driven by the drive side of the heat engine and the supercharger is arranged in one of an intake line and a pressure line of the compressor. The pressure line forms the connection between the compressor and a pressure reservoir which is connected through another line to the devices using the compressed gas.