Comparison of energy-efficiency and size of portable oil-free screw and scroll compressors

10th International Conference on Compressors and their Systems

Dmitriev, Olly^1 ; Arbon, Ian Macdonald^1

Vert Rotors UK Ltd, Edinburgh, United Kingdom^1

关键词: Oil-free;    Screw compressors;    Test data;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/232/1/012057/pdf
DOI  :  10.1088/1757-899X/232/1/012057

来源: IOP

【 摘 要 】

This paper presents test data and evaluates if conical screw compressors can become a preferred alternative to scroll compressors in small oil-free duties from 0.04 to 15kW. The conical screw compressor is a new modification of the conventional screw compressor. A 2kW water-injected conical compressor demonstrated a 34% better energy efficiency than a scroll compressor of similar capacity. At 8 bar(g) load, the conical machine used 13% more energy and produced 42% more flow. Size of the conical screw package is 46% of the scroll package. The miniature conical screw package, at 40W rated power, achieved a pressure of 8 bar(g) in water-injected operation. It can be concluded that the conical screw compressor would be an attractive alternative in micro and small oil-free applications.