Abstract
A new type of rotary compressor, called “rotary-chamber compressor”, consists of two interlocking rotors with 4 wings each, that perform non-uniform rotary movements. Both rotors have the same direction of rotation, while one rotor is accelerating, the other rotor is retarding. After surpassing a specific mark, the sequence changes and the leading rotor begins to retard and vice versa. Due to the resulting relative phase difference, the volume between the two wings is changing periodically, which allows pulsating working chambers. The technology was first introduced by its founder Jürgen Schukey in 1987. Since then, no further development on this machine is known to us except our own. In this contribution, a study on the kinematics of the rotary-chamber-compressor is presented. Initial studies have shown that changes in the kinematics of the rotors will have a direct influence on the thermodynamical variables, which, if optimized, can lead to an increased performance of the machine. Therefore, a mathematical model has been developed to obtain the performance parameters from different kinematic concepts by using numerical CFD analysis. Furthermore, additional optimization possibilities will be listed and discussed.
Highlights
In recent years, several novel compressor types are of interest with the focus to achieve the same or better performance levels compared to existing technologies at reduced costs, noise and vibration
The results of the kinematic study are shown in Figure 8 and Table 3
The comparison of the volumetric efficiency λ and mass flow rate MFR between each function is presented in Figure 8 (a) and (b)
Summary
Several novel compressor types are of interest with the focus to achieve the same or better performance levels compared to existing technologies at reduced costs, noise and vibration. They are typically rated on mass flow rate (MFR) and energy performance, given by the volumetric efficiency λ and isentropic or polytropic efficiencies [1]. A new rotary type compressor called “rotary-chamber compressor” was first introduced by Jürgen Schukey [8] He designed the machine to be operated as a compression or expansion engine for refrigeration and heat recovery applications.
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