aeroderivative gas turbine drivers

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Paper PS2-6 PS2-6.1  AERODERIVA TIVE GAS TURBINE DRIVERS FOR THE CONOCOPHILLIPS OPTIMIZED CASCADE SM LNG PROCESS— WORLD’S FIRST APPLICATION AND FUTURE POTENTIAL Cyrus B. Meher-Homji, PE. Bechtel Corporation Doug Yates, PE. Hans P. Weyermann Karl Masani Weldon Ransbarger Satish Gandhi ConocoPhillips Compan y  AB STRACT Market pressures for new thermally efficient and environmentally friendly LNG  plants coupled with the need f or high plant availability have resulted in the world’s f irst application of high performance PGT2500+ aeroderivative gas turbines for the 3.7 MTPA Darwin LNG plant. The plant was operational several months ahead of contract schedule and has exceeded its production target for 2006. This paper will describe the philosophy leading to the world’s first aeroderivative based gas turbine plant and future potential for the application of larger aeroderivative drivers which are an excellent fit for the ConocoPhillips Optimized Cascade SM* LNG Process. Aeroderivative engines fit the Optimized Cascade process because of the two trains in one design co ncept that facilitates the use of available aeroderivative engines. The plant is able to operate at reduced rates of 50-70% in the event that one refrigeration compressor is down. The application of a range of larger aeroderivative engines that are now available allow a flexible design fit fo r the Optimized Cascade process. Benefits of aeroderivative engines over large heavy duty single and two shaft engines include significantly higher thermal efficiency and lower greenhouse gas emissions, the ability to startup without the use of large helper motors, and improved production efficiency due to modular engine change outs. This paper covers several practical aspects of the application of aeroderivative gas turbines as refrigeration drivers and discusses design and implementation considerations. The selection of aeroderivative engines and their configurations for various train sizes, and evaluation of emission considerations are covered. * Optimized Cascade services are provided by ConocoPhillips Company, Phillips LNG Technology Services Company and Bechtel Corporation via a collaborative relationship with ConocoPhillips Company. Optimized Cascade, the Optimized Cascade logo, ConocoP hillips and it s logo are tradem arks of ConocoPhillips Company. Bechtel and its logos are trad emarks of Bechtel Group Inc.  

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