Determining the energy performance of a rotating machine for fluid flow

The rotating machine, to which the paper relates, refers to the following: A rotating machine construction solution that can be used as a power machine (steam engine, pneumatic engine) The same construction solution can be used as a working machine (pump, fan, and compressor). The constructive solution and the operating principle of the rotating machine are presented, the flow rate and the machine power computation model is indicated. At the end of the paper, the machine effective efficiency is experimentally determined.