Thumbnail Image

Development of a peristaltic compressor and other novel oil-free compressor technologies

Islam, Mazharul
Increasing demand for a more efficient compressor technology created the necessity for more innovative equipment to reduce losses, save energy consumption and save cost. These work presents four novel oil free compressor technologies, which has the potential to improve compressor efficiency by reducing losses. The first novel compressor is peristaltic compressor which has the ability to eliminate valve loss and internal volume ratios. This compressor operates by means of a progressively actuated diaphragm that compresses vapor and stimulates flow through a cylindrical chamber. In this study, we present a mechanistic chamber model of the compressor. Additionally, validation of the model is presented using data from a reconfigurable prototype compressor using air as the working fluid. The mechanistic chamber model of the peristaltic compressor predicts the experimental mass flow rate and volumetric efficiency within 10% MAPE.
This work also introduces the novel toroidal compressor, which uses electromagnetic force to operate multiple pistons in a circular tube. The piston angle can be adjusted to create a vacuum to draw fluid into the system and compress it. The compression cycle ends with fluid discharge through an outlet. Electromagnetic force moves pistons to precisely control compression, optimizing performance and efficiency. In order to deal with the complex challenges of achieving increased performance in industrial compressors, this study presents another two novel compressor technologies: opposed rotor screw compressor and conical screw compressor. The mechanistic chamber model is developed to determine the geometry, thermodynamic properties, and efficiency of the compressors.
Various shapes, capacities, and speeds are taken into consideration to analyze the performance of the compressors. By adjusting the conditions of the compressors, their performance varies. However, the findings indicate that for compressors with a capacity ranging from 3 to 200 cubic feet per minute (CFM), by carefully selecting the appropriate design and geometry, it is possible to achieve a volumetric efficiency above 90% and an overall isentropic efficiency more than 65%. The performance of the compressors is also evaluated in comparison to a legacy compressor to get insights into the technology and determine the most suitable design for enhancing efficiency. The study of the models on different features will serve as a foundation for the development of a more economical next-generation novel compressor design.