GE OIL GAS TURBOCOMPRESSOR TRAINS ON （GE油气涡轮压缩机的火车）.pdf

GE OIL GAS TURBOCOMPRESSOR TRAINS ON FIRST FLOATING LNG PLANT Antonio Pelagotti Gabriele Mariotti Carlo Cortese GE OilGas KEYWORDS: floating LNG, compressor, steam turbine, turboexpander, rotating equipment ABSTRACT As new technology frontier in LNG production, the construction of the first Floating LNG Plant has started off the coast of West Australia. The FLNG vessel will be around 500 m long and will weigh 600,000 tons circa and will produce more than 3.5 Mtpa of LNG for more than 20 years. For this LNG application, the customer has selected the steam turbine as driver for the large compressors, since in the project priority has been given to the reliability, safety and maintenance aspects. GE Oil Gas is providing the two larger trains, i.e. PMR and the MR turbo-compressor, on which a tailored design have been applied in order to fulfill the challenging requirements and limitations of the offshore application. For the two 60 MW steam turbines, the design has been completely reviewed in order to comply with the strictly weight requirements. In addition, deeper analysis and investigations have been performed in order to satisfy the safety restrictions required for board installation. Finally, the effects of the movements of the vessel and related loads transmitted in different cyclones conditions have been simulated and the related rotor dynamics behavior verified. This paper will present the turbo-compressor trains design challenges, optimizations and deeper analysis developed in order to guarantee all the peculiarities deriving from the floating LNG application. 1 INTRODUCTION The most common arrangement studied for FLNG is the