Analysis of the Vading concept–a new rotary-piston compressor, expander and engine principle

Abstract: A novel concept for rotary machines is described. A rotor is positioned acentrically in a cylindrical cavity. One or more (typically, three or four) vanes slide radially in slots in the rotor. The vanes are connected to an axle such that the tip of a vane follows the internal surface of the housing without touching it. It is shown how the concept can be utilized in the design of compressors, expanders, and internal combustion engines. A thermodynamic model is formulated for the engine process, and calculations for a chosen set of geometrical data are presented. It is concluded that the machine can be described mathematically, and that it can work as claimed by the inventor, Kjell Vading. Some potential advantages over other concepts are discussed