Centrifugal compressors are widely used onboard LNG carrier, the oil and gas industry, and are booming increasing demand in the wave of recent soaring crude oil and natural gas prices. Reduction of life cycle costs is a key issue for compressors used in this application, which are required to have high efficiency, high reliability and sufficient operating range to be suitable for changes in load. Reliable operation of installations and tight delivery schedules are crucial for LNG suppliers. In order to satisfy these requirements, an efficient capacity control method needs to be established in addition to the improvement of impellers with higher efficiency and a wider operating range.
The purpose of this research is to provide information and explanations of these compressors, considered essential to the operation of LNG carriers, understanding the complex operation of these installations is paramount to any officer in order to anticipate and to be responsive to failures that may have serious consequences for running cost of the vessel.
Keywords
Centrifugal compressor, The rotary lobe-type compressor, HD Compressor, LD Compressor, Inlet Guide Vane, Variable Diffuser Vane, LNG, BOG, Impeller.
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