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THE GOAL: MINIMIZE COSTS, INCREASE FLEXIBILITY AND REDUCE MAINTENANCE Centrifugal compressors are finding greater demand in oil & gas (O&G) applications, particularly as less traditional forms of gas become more commonplace. Companies are replacing screw and reciprocating machines with upgraded centrifugals to move higher flow volumes; improve availability; lower cost; reduce maintenance (Sept/Oct11, p. 18); and handle heavier offshore natural gas blends. This trend is particularly apparent in coal seam gas or shale gas in countries with large coal and gas reserves such asAustralia, says Ralf Kannefass, Head of Compression & Solutions Turbo Equipment at Siemens. Indeed, more challenging projects and user demands are driving the introduction of new technology around the world: • Cameron has introduced sculpted diffuser plates and high-speed pinion-bearings •Atlas Copco is working on better stage and impeller efficiency •Dresser-Rand’sDatumD6R6Baddresses high-density gases at high pressures • Kawasaki Heavy Industries – Kobe (KHI) has adopted vaned diffusers for smalland mid-flow stages • Rolls-Royce has optimized the aerodynamics of its RCB compressor • Man Diesel & Turbo touts the advantages of its motor-driven hermetically sealed compressors • Kobelco emphasizes the importance of API 617 compliance • GE Oil & Gas has geared up for CO2 applications • Elliott ...
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