scholarly journals PFB coal fired combined cycle development program. Commercial plant requirements definition update (Task 1. 1)

1980 ◽  
Author(s):  
Satoshi Hada ◽  
Masanori Yuri ◽  
Junichiro Masada ◽  
Eisaku Ito ◽  
Keizo Tsukagoshi

MHI recently developed a 1600°C class J-type gas turbine, utilizing some of the technologies developed in the National Project to promote the development of component technology for the next generation 1700°C class gas turbine. This new frame is expected to achieve higher combined cycle efficiency and will contribute to reduce CO2 emissions. The target combined cycle efficiency of the J type gas turbine will be above 61.5% (gross, ISO standard condition, LHV) and the 1on1 combined cycle output will reach 460MW for 60Hz engine and 670MW for 50Hz engine. This new engine incorporates: 1) A high pressure ratio compressor based on the advanced M501H compressor, which was verified during the M501H development in 1999 and 2001. 2) Steam cooled combustor, which has accumulated extensive experience in the MHI G engine (> 1,356,000 actual operating hours). 3) State-of-art turbine designs developed through the 1700°C gas turbine component technology development program in Japanese National Project for high temperature components. This paper discusses the technical features and the updated status of the J-type gas turbine, especially the operating condition of the J-type gas turbine in the MHI demonstration plant, T-Point. The trial operation of the first M501J gas turbine was started at T-point in February 2011 on schedule, and major milestones of the trial operation have been met. After the trial operation, the first commercial operation has taken place as scheduled under a predominantly Daily-Start-and-Stop (DSS) mode. Afterward, MHI performed the major inspection in October 2011 in order to check the mechanical condition, and confirmed that the hot parts and other parts were in sound condition.


Author(s):  
Jenny Persson ◽  
Anthony J. Donaldson

The next stage of Generation IV High Temperature Gas-Cooled Reactor (HTGR) is currently under development for production of electricity and process heat. High outlet temperature of the helium coolant makes it possible to use gas turbines in future power conversion systems. This paper compares the costs and risks of various direct and indirect power conversion systems to evaluate the best commercial electricity generation option. It concludes that, although a direct cycle was predicted to be more efficient, a significant cost and risk reduction will be achieved for an indirect cycle for the near term commercial electricity generating plant. The indirect Combined Cycle Gas Turbine (CCGT) cycle offers excellent efficiency, together with lowest risk and cost for the near term commercial plant. This combines a gas turbine of low-risk design with a current technology steam system. However, the intermediate heat exchanger (IHX) represents a major development item and also introduces some major risks. The implications of the IHX risks have not been fully assessed. In the longer term, when development of high risk and high cost components such as electro-magnetic bearings are more mature, a direct cycle may merit reconsideration on the grounds of elegance and simplicity, in particular a direct Brayton cycle.


Author(s):  
S. Aoki ◽  
Y. Tsukuda ◽  
E. Akita ◽  
Y. Iwasaki ◽  
R. Tomat ◽  
...  

The 701G1 50Hz Combustion Turbine continues a long line of large heavy-duty single-shaft combustion turbines by combining the proven efficient and reliable concepts of the 501F and 701F. The output of the 701G1 is 255MW with combined cycle net efficiency of over 57%. A pan of component development was conducted under the joint development program with Tohoku Electric Power Co., Inc. and a part of the design work was carried out under the cooperation with Westinghouse Electric Corporation in the U.S.A. and Fiat Avio in Italy. This gas turbine is going to be installed to “Higashi Niigata Power Plants NO.4” of Tohoku Electric Power Co., Inc. in Japan. This plant will begin commercial operation in 1999. This paper describes some design results and new technologies in designing and developing this next generation 1500°C class advanced gas turbine.


1980 ◽  
Author(s):  
R. E. Strong ◽  
D. J. Amos ◽  
K. H. Eagle ◽  
G. L. Francois

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