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首页> 外文会议>ASME(American Society of Mechanical Engineers) Turbo Expo vol.5 pt.A; 20050606-09; Reno-Tahoe,NV(US) >GAS TURBINE PROPULSION FOR LNG TRANSPORTS
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GAS TURBINE PROPULSION FOR LNG TRANSPORTS

机译：液化天然气运输用燃气轮机推进器

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摘要

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航空衍生燃气轮机于1960年代末和1970年代初首次引入海上作业。 GE现在正在利用其多年的可靠航海经验和海上双燃料经验，为LNG运载工具（LNGC）推进器和电力提供双燃料燃气轮机。随着现在开始建造更大的新LNGC，业界正认真考虑对基于燃气轮机的系统进行更改，以利用其许多优势。用于LNGC的CoGES（燃气轮机-蒸汽发生器的组合）电厂包括双燃料燃气轮发电机组（GTG）和辅助设备，热回收蒸汽发电机（HSRG），蒸汽轮发电机组，给水，蒸汽和冷凝水系统。利用游轮可靠性程序，GTG仪表和控制系统具有单点容错能力。燃气轮机发电厂还具有许多其他优点，包括但不限于：1.使用蒸发气体作为经济高效且环保的燃料（低速柴油船需要在船上对蒸发气体进行复杂的再液化）2 。当安装在甲板上时，CoGES工厂可提供高功率密度，从而转化为增加的货运收入和递延的资本成本。 3.燃气轮机易于维护，更换迅速。 GE的2 X LM2500 CoGES工厂是为满足国际上散装液化气船舶的建造和设备规范（IGC）和船级社标准而开发的，是一种非常简单且可靠的解决方案。具有干运转功能的HRSG用于代替排气阻尼器和旁路系统。任何一台原动机的停机都会使工厂剩余额定功率的50％。通用备件是固有的。通过FMECA类型研究确定具有与传统LNGC推进系统同等的安全水平，这2台双燃料LM2500 CoGES工厂已通过“原则上认可”，可用于LNG船。另外，GE的1 X双燃料LM6000或1 X LM2500 + / G4 CoGES工厂通过降低设备成本和提高燃油经济性解决了资本和运营成本的压力。通过具有干运行能力的HRSG和STG以及辅助柴油发电机组，可以实现冗余和简单。 LM2500系列和LM6000 CoGES工厂均提供了传统蒸汽轮机和低速柴油机推进器的可行替代方案。气体燃料，液体燃料和双燃料操作为船东提供了灵活性和冗余性，这些船东必须在整个船队生命周期中以每MMBTU尽可能最低的成本安全可靠地运送货物。

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