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GAS TURBINE PROPULSION FOR LNG TRANSPORTS

机译：用于液化天然气运输的燃气轮机推进

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GE aero-derivative gas turbines were first introduced into marine operations during the late 1960's and early 1970's. GE is now leveraging its many years of proven marine experience and offshore dual-fuel experience to offer dual-fuel gas turbines for LNG Carrier (LNGC) propulsion and electric power. With building of new larger LNGC's now beginning, the industry is seriously considering a change to gas turbine based systems in order to capitalize on their many advantages. CoGES (combined gas turbine - steam generator electric) plants for LNGC's consist of dual-fueled gas-turbine-generator (GTG) set(s) and auxiliaries, heat-recovery steam generator (HSRG), a steam-turbine-generator set, feed-water, steam and condensate systems. Leveraging cruise-ship reliability programs, the GTG instrumentation and control systems are single-point fault tolerant. Gas turbine power plants offer many additional advantages, including but not limited to: 1. Use of boil-off gas as a cost-effective and environmentally friendly fuel (slow speed diesel ships require complex on-board reliquifaction of boil-off gas) 2. When installed on deck, CoGES plants provide high power-volume density that translates into increased cargo revenue and deferred capital cost. 3. Gas turbines ease of maintenance and quick change-out. Developed to meet the International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC) and classification society standards for marine applications, GE's 2 X LM2500 CoGES plant is a very simple and reliable solution. Dry-run capable HRSG's are used in lieu of exhaust damper and by-pass systems. Outage of any one prime mover leaves the plant with nominally 50% power remaining. Common spares are inherent. Established as having an equivalent level of safety as traditional LNGC propulsion systems via FMECA type studies, the 2 x dual-fueled LM2500 CoGES plant has been "Approved in Principle" by Class for use on LNG Carriers. Alternatively, GE's 1 X dual-fueled LM6000 or 1 X LM2500+/G4 CoGES plant addresses capital & operating cost pressures via reduced equipment costs and improved fuel economy. Redundancy and simplicity are achieved via a dry-run capable HRSG and an STG, combined with auxiliary diesel generator sets. Both the LM2500 family and LM6000 CoGES plants offer viable alternatives to traditional steam turbine and slow-speed-diesel propulsion. Gas-fuel, liquid-fuel, and bi-fuel operation provide flexibility and redundancy to ship owners who must safely and reliably deliver cargo at the lowest possible cost per MMBTU throughout a fleet life cycle.
机译：GE Aero-Derivative燃气轮机首先在1960年代后期和1970年代初期引入海洋操作。 GE现在利用其多年的经验丰富的海洋经验和离岸双燃料经验，为LNG载体（LNGC）推进和电力提供双燃料燃气轮机。随着新的LNGC的建立现在开始，该行业严重考虑了基于燃气轮机的系统的变化，以利用它们的许多优点。 LNGC的COGES（组合燃气轮机 - 蒸汽发生器电气）厂厂由双燃气汽轮机 - 发电机（GTG）组成，包括助长蒸汽发生器（HSRG），蒸汽汽发电机组，饲料，蒸汽和冷凝水系统。利用巡航船舶可靠性计划，GTG仪表和控制系统是单点故障容忍。燃气轮机发电厂提供许多额外的优点，包括但不限于：1。蒸发气体作为经济效益和环保燃料（缓慢柴油船舶需要复杂的蒸发蒸发汽油换乘器）2 。安装在甲板上时，Coges Plants提供高动力量密度，转化为货物收入增加和延期资本成本。 3.燃气轮机易于维护和快速变化。开发符合船舶携带液化气（IGC）和级别船舶应用的船舶建筑和设备的国际规范和海洋应用的标准，GE的2 X LM2500 Coges Plant是一种非常简单可靠的解决方案。使用干运行的HRSG代替排气阻尼器和旁路系统。任何一个原动机的中断使得植物留下了标称50％的功率。常见的备件是固有的。通过FMECA型研究建立了与传统LNGC推进系统具有相同的安全水平，通过课堂使用2×双燃料LM2500 COGES工厂以供液化轧辊使用“原则上”。或者，GE的1 x双燃料LM6000或1 x LM2500 + / G4齿轮工厂通过降低设备成本和提高燃油经济性来解决资本和运营成本压力。通过干运行的HRSG和STG实现冗余和简单性，与辅助柴油发电机组相结合。 LM2500系列和LM6000 Coges植物均提供传统汽轮机和慢速柴油推进的可行替代品。燃气 - 燃料，液体燃料和双燃料操作为船主提供了灵活性和冗余，在整个车队生命周期中，必须在每MMBTU的最低价格上安全可靠地送货上的货运。

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