Ge Appliances Turboexpander Compressors Brochure
Ge-Turboexpander-Compressors-Brochure-648660 ge-turboexpander-compressors-brochure-648660
2015-08-07
: Ge-Appliances Ge-Turboexpander-Compressors-Brochure-648660 ge-turboexpander-compressors-brochure-648660 ge-appliances pdf
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GE Oil & Gas Turboexpander-compressors Increased efficiency for refrigeration applications Turboexpandercompressors Turboexpanders are used in all segments of the oil and gas industry to produce cryogenic refrigeration, while increasing the facility’s energy efficiency and reducing its CO2 footprint. Alternative approaches include expansion of the gas stream through a valve, which does not recover energy, and external refrigeration, which consumes energy. A turboexpander, on the other hand, is a pressure let-down device that produces cryogenic temperatures while simultaneously recovering energy from a plant stream in the form of shaft power that can be used to drive other machinery such as a compressor. This approach avoids fuel consumption, improves overall process efficiency and reduces the plant’s environmental impact. How they work A turboexpander expands process fluid from the inlet pressure to the discharge pressure in two steps: first through variable inlet guide vanes and then through the radial wheel. As the accelerated process fluid moves from the inlet guide vanes to the expander wheel, kinetic energy is converted into useful mechanical energy – extracting energy from the process fluid and cooling it down. The mechanical energy is available to drive other process equipment – in this case, a compressor. Design & performance to rely on GE Oil & Gas turboexpander-compressors are available in a wide selection of frame sizes to match virtually any application. Our high-efficiency designs are created with the most advanced computational tools to ensure optimal refrigeration and energy recovery. Over 60 years of turbomachinery experience and an operational database from the industry’s largest installed fleet guarantee a robust design and a long mean time between maintenance. Best match to the application • Large portfolio of frame sizes including large-capacity machines • Optimized footprint and weight for offshore applications High performance • State-of-the-art design and validation tools; large database of verified wheels • Proven innovations from GE Engineering Centers of Excellence • Optimal integration with other GE Oil & Gas equipment High availability • Robust, proven designs based on extensive installed base • Worldwide, regional support through the GE Oil & Gas Global Services network Coordinated project management • Single point of contact for plant equipment and controls, installation, startup, commissioning and service • Capability of full-load string testing with up- or downstream compressor Typical applications GE Oil & Gas key references • Floating LNG: turboexpander-compressors offer lighter weight, more compact and more efficient refrigeration cycles for the liquefaction of natural gas • Qatar Shell Pearl: first GTL turboexpander-compressor (Frame 60, 13,900 HP) • Liquefied petroleum gas (LPG)/natural gas liquids (NGL): turboexpander-compressors provide energy-efficient cryogenic refrigeration for more complete removal of condensates (LPG or NGL) from hydrocarbon gas streams • Ethylene: turboexpander-compressors increase the overall plant efficiency by tail gas refrigeration and subsequent fuel gas recompression • Dew point control: turboexpander-compressors chill gas streams for the removal of moisture to provide dry gas or to control the heating value of fuel gases • Ras Laffan: highest power active magnetic bearing turboexpander-compressor (Frame 60, 15,100 HP) • Qatar Petroleum (offshore): first NACE-compliant active magnetic bearing (Frame 50, 5,100 HP) • N’kossa LPG: first active magnetic bearing installed on an FPSO (Frame 40, 4,900 HP) • Tasnee Petrochemicals: two-stage tail gas machine for 1.0 Mtpa ethylene plant (Frame 40, 1,500 HP) • BP Cusiana: high-pressure dew point control turboexpandercompressors (Frame 20S, 1,400 HP) Technologies for extreme challenges With over 900 turboexpander-compressors in operation worldwide, GE Oil & Gas has the largest installed base in the industry. Turboexpander-compressor with oil bearings. A variety of models are also available with active magnetic bearings. GE Oil & Gas Turboexpander-compressors Robust, smaller footprint & enhanced performance for the most demanding applications AMB junction boxes (signal & power) Feed-through seal connection Active magnetic bearings Part of our standard active magnetic bearing (AMB) design. Two boxes for signal cable connection to monitor the bearing position, speed and temperature. Two boxes for power cable connection. All AMB junction boxes and feed-through seals are pressure tested to the highest standard. Provides a hermetic seal between the power and signal junction box and pressurized bearing housing. In standard or “canned” configuration, these are fully NACE compliant for sour-gas service. Steel forged bearing housing provides maximum stiffness to withstand high process piping loads. Turboexpandercompressor with active magnetic bearings. A variety of models are also available with oil bearings. Expander diffuser Finalizes expansion of process gas, further decelerating the flow to increase pressure drop through the expander. Typically carbon or stainless steel. Expander casing Fabricated from plates and forgings 100% NDE inspected, geometry optimized with CFD to minimize flow distortions. Special “zero leakage” solutions available for sour and toxic gases. Available in carbon or stainless steel. Nozzle assembly (inlet guide vanes) Aerodynamically customized to maintain superior flow characteristics over a wide range of process conditions; mechanically designed to withstand liquid droplets and solid particles. Compressor discharge scroll Increases pressure rise at discharge of impeller to enable higher compression ratios. All scrolls are of cast type and designed for easy disassembly. Expander wheel Heat barrier wall (expander seal) Separates the cryogenic environment from the warm bearing housing. Typically Micarta with special insert to accomodate the seal gas labyrinth. Bearing housing Compressor casing Typically carbon or stainless steel. Open or closed design. CFD designed for highest efficiency and milled from single-piece aluminum, titanium alloy or stainless steel. Lightweight for stable rotor dynamics. Can handle condensing streams. Available in oil or magnetic bearing design, typically in carbon or stainless steel and designed for the highest stiffness and strength. Smaller packages and bigger results for plants on land and at sea FR50 with oil bearings Frame Shaft power (kW) Expander outlet flow max. (m3/h) Expander inlet/outlet flange max. (in) Compressor inlet/outlet flange max. (in) 20 25 30 40 50 60 80 1,600 2,000 4,800 6,500 10,000 15,000 20,000 4,000 5,500 9,000 16,000 25,000 36,000 45,000 8 / 10 10 / 12 12 / 18 16 / 24 20 / 30 24 / 36 26 / 40 14 / 14 18 / 16 20 / 18 26 / 24 32 / 28 40 / 36 42 / 38 Available casing ratings 150 300 600 900 1500 • • • • • • • • • • • • • • • • • • • • • • • • • • • • FR50 with active magnetic bearings GE imagination at work ge.com/oilandgas GE Oil & Gas ge.com/oilandgas Global Headquarters Via Felice Matteucci, 2 50127 Florence, Italy T +39 055 423 211 F +39 055 423 2800 customer.service.center@ge.com Nuovo Pignone S.p.A. The information contained herein is general in nature and is not intended for specific construction, installation or application purposes. GE reserves the right to make changes in specifications or add improvements at any time without notice or obligation. Americas Regional Headquarters 4424 West Sam Houston Parkway North Houston, Texas 77041 P.O. Box 2291 Houston, Texas 77252-2291 T +1 713 683 2400 F +1 713 683 2421 ©2010 General Electric Company All Rights Reserved For complete contact information, please refer to our website. GE imagination at work GE_TXComp_Brochure_020310
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