Siemens an­nounces tech­nol­ogy to boost power plant ef­fi­ciency

Kuwait Times - - TECHNOLOGY -

Siemens is paving the way for the next level of ef­fi­ciency with the de­vel­op­ment of its HL-class. In June 2017, Siemens an­nounced the com­pany will val­i­date the tech­nolo­gies of its HL­class at Duke En­ergy’s Lin­coln County site in North Carolina. Siemens is de­vel­op­ing this class in an evo­lu­tion­ary de­vel­op­ment step de­rived from its proven SGT-8000H tech­nol­ogy. The ad­vanced Siemens HL­class gas tur­bines com­bine a se­ries of new but al­ready tested tech­nolo­gies and de­sign features with the best of past ex­pe­ri­ence - re­sult­ing in a tech­nol­ogy car­rier to the next level of ef­fi­ciency and per­for­mance.

The HL-class is clear­ing the way to ef­fi­ciency lev­els be­yond 63 per­cent with a mid-term goal to reach 65 per­cent. Fur­ther­more, Siemens is gain­ing speed to drive tech­no­log­i­cal up­grades and com­pet­i­tive­ness by trans­fer­ring newly de­vel­oped key tech­nolo­gies to its en­tire gas tur­bine port­fo­lio. In the near fu­ture, all cus­tomers will ben­e­fit from fur­ther ef­fi­ciency and per­for­mance in­creases. This ap­proach is part of a se­ries of ac­tiv­i­ties to help Siemens’cus­tomers com­pete in a rapidly changing mar­ket - work­ing to sig­nif­i­cantly re­duce lead and con­struc­tion times through stan­dard­iza­tion and mod­u­lar­iza­tion.

The new Siemens HL-class con­sists of three en­gines: SGT5-9000HL, SGT6-9000HL and SGT58000HL. In sim­ple-cy­cle op­er­a­tion the air-cooled SGT-9000HL gas tur­bine will pro­vide a ca­pac­ity of 545 megawatts (MW) for the 50-Hertz mar­ket and 374 MW in the 60-Hertz ver­sion. SGT5-8000HL will pro­vide 453 MW in sim­ple-cy­cle op­er­a­tion. All en­gines reach more than 63 per­cent com­bined cy­cle ef­fi­ciency. To achieve top per­for­mance, the tur­bines op­er­ate at high com­bus­tion tem­per­a­tures. For this pur­pose, Siemens’ spe­cial­ists have de­vel­oped ad­vanced com­bus­tion tech­nolo­gies, in­no­va­tive multi-layer coat­ings, su­per-ef­fi­cient in­ter­nal cool­ing features as well as an op­ti­mized wa­ter­steam cy­cle.

Fur­ther­more, op­ti­mized seal­ing’s min­i­mize cool­ing and air leak­age. At the same time, evo­lu­tion­ary 3D-blad­ing is en­abling higher aero-ef­fi­ciency for the com­pres­sor. Pre­de­fined and pre­fab­ri­cated so­lu­tion el­e­ments as well as pre-se­lected ven­dors and prod­ucts al­low a sig­nif­i­cantly re­duced con­struc­tion time and a fast start for projects. The tur­bines are de­signed to plug in to Siemens’ dig­i­tal of­fer­ing for plant op­er­a­tors and util­i­ties alike, in­cor­po­rat­ing con­nec­tiv­ity to MindSphere, the cloud-based Siemens oper­at­ing sys­tem for the In­ter­net of Things.

MindSphere of­fers ac­cess to pow­er­ful an­a­lyt­ics from Siemens and its part­ners - us­ing in­tu­itive in­sights in en­gine op­er­a­tion and de­ci­sion sup­port to de­liver ben­e­fits to cus­tomers. “Driven by dig­i­tal­iza­tion, speed in tech­nol­ogy de­vel­op­ment is rapidly gain­ing mo­men­tum in the power gen­er­a­tion arena,” said Willi Meixner, CEO of the Siemens Power and Gas Divi­sion. “It took us 10 years from 2000 to 2010 to in­crease the ef­fi­ciency of our com­bined cy­cle power plants from 58 to 60 per­cent, a fur­ther six years to reach 61.5 per­cent in 2016 and now we are tak­ing the next step to 63 per­cent and be­yond. That’s amaz­ing.

But we know that speed and ef­fi­ciency alone are not suf­fi­cient - re­li­a­bil­ity and cost ef­fec­tive­ness of our so­lu­tions as well as part­ner­ship, sup­port in fi­nanc­ing and in­sur­a­bil­ity are also key to our cus­tomers,” said Meixner.

To min­i­mize cus­tomer risk, Siemens is fol­low­ing an ex­ten­sive and thor­ough val­i­da­tion and test­ing ap­proach. Af­ter com­po­nent test­ing and pro­to­type test­ing in Siemens-owned fa­cil­i­ties, the com­pany is now pur­su­ing val­i­da­tion un­der real field con­di­tions. “With the new HL-class our cus­tomers will be pre­pared for what­ever dig­i­tal­iza­tion brings in the fu­ture,” Meixner added.

“World­wide we see re­new­ables are grow­ing rapidly, but gas-fired power plants will still play a vi­tal role in the en­ergy mix for the next decades,” said Meixner. “With the grow­ing share of fluc­tu­a­tion power from re­new­ables, flex­i­bil­ity will be a key fea­ture of gas tur­bines. Our HL-class of­fers a sim­ple-cy­cle ramp-up of 85 MW per minute. There­fore, highly ef­fi­cient and flex­i­ble gas tur­bines like our HL-class are the per­fect fit to en­ergy sys­tems with a rapidly in­creas­ing share of fluc­tu­at­ing re­new­ables,” said Meixner.

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