Abstract
It is estimated that about 17% of the world’s generated power is used for compression. Thus all, even minor improvement of the efficiency of compressors will substantially reduce CO2 emission. This paper presents development of family of energy efficient oil-flooded screw compressors for Kirloskar Pneumatic Company Ltd. The developmental techniques adopted to improve efficiency such as introduction of superior ‘N’ rotor profile, rotor clearance management, performance calculation using 3D CCM (Computational Continuum Mechanics), direct parametric interface to CAD (Computer Aided Design), which contains bearing selection for complete 3D solid modelling. Also, contemporary prototyping and experimental investigation is supported by the fully computerised data acquisition and processing. The cumulative improvement of all these elements of the design process resulted in a very efficient machine which guarantees the competitive position of Kirloskar Pneumatic Company Limited in the screw compressor market.
Highlights
Oil-Flooded screw compressors have a wide variety of applications such as air compression, oil and gas refrigeration and power utilization from low grade heat sources etc
This paper details collaborative design and development of oil-flooded screw compressors performed by Kirloskar Pneumatic Company Ltd. and the Centre for Compressor Technology at City, University of London
This was done by use of proprietary software packages which contains the most contemporary versions of performance calculations, design and experimental tools resulting in an efficient family of screw compressors
Summary
Oil-Flooded screw compressors have a wide variety of applications such as air compression, oil and gas refrigeration and power utilization from low grade heat sources etc. Through continuous research and development various tools have been developed at City, University of London for design and development of screw compressors. This paper focuses on the various design criteria in terms of rotors, clearances, bearings and oil injection to design, manufacture and test screw compressor family prototypes. It is seen that with improvement in design procedures overall performance characteristics are improved This leads us to the fact that, better performing machine can be translated into lower operating costs as well as reduction in CO2 footprint. A good screw compressor will have maximum delivery per unit size or weight of the machine In doing so it should consume minimum power for given operating conditions. Based on the male rotor sizes, the oil-injected compressor design is characterised further to achieve full prototypes. 6.5 bar - Prototype 3 6.5 bar - Prototype 2 6.5 bar - Prototype 1 8.5 bar - Prototype 3 8.5 bar - Prototype 2 8.5 bar - Prototype 1 10.5 bar - Prototype 3 10.5 bar - Prototype 2 10.5 bar - Prototype 1 13.5 bar - Prototype 3 13.5 bar - Prototype 2 13.5 bar - Prototype 1
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