Experimental Investigation of Screw Compressor

Abstract

This project work is divided in two parts. Part one is to design experimental setup to determine temperature and pressure distribution in the rotor profile of 37 kW oil injected screw compressor. Screw compressors are mechanical devices used for raising the pressure of gas. This design includes selection of various location for embedding the temperature and pressure transducer. Specification, suppliers, least count and cost of pressure transducer, temperature transducer, encoder, slip ring, data acquisition system, torque meter, rotational speed meter, oil flow meter, air flow meter and three phase induction motor are found using various sources. In part two experiments were carried out on 37 kW testing at M/s Ingersoll Rand Ltd. Part two is to determine performance of screw compressor to know adiabatic efficiency, volumetric efficiency and specific power by changing rotational speed, discharge pressure and oil flow rate. It was found that by increasing rotational speed and oil flow rate, volumetric e ciency and specific power increases whereas adiabatic efficiency decreases. By increasing discharge pressure adiabatic efficiency and specific power increases but volumetric efficiency decreases.