A multi-stage compression system is employed to recover boil-off gas (BOG) primarily because it is more efficient and results in lower discharge temperatures compared to a single-stage compression system for achieving the required pressure increase. BOG is typically at a low pressure, close to atmospheric, and needs to be compressed to a significantly higher pressure for reliquefaction or use as fuel gas. Compressing a gas in a single stage from a low pressure to a ....
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