NDLI: Development of Performance Deterioration Diagnosis Method for Gas Turbine Combined Cycle Power Plants

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Takahashi, Toru Koda, Eiichi Nakao, Yoshinobu
Copyright Year	2010
Abstract	Recently, it is more necessary to maintain or improve the thermal efficiency of actual thermal power plants to reduce CO2 emission and energy consumption in the world, and it is also important to reduce the maintenance cost of commercial thermal power plants. Thus, it is crucial to investigate power plant performance deterioration factors and solve problems related to these factors promptly when the thermal efficiency decreases. However, it is difficult to understand the internal state of power plants sufficiently and to determine power plant performance deterioration factors only from operation data because actual thermal plants are composed of many components and are very complex systems. In particular, it is more difficult to understand performance deterioration in gas turbine combined cycle (GTCC) power plants than in steam power plants because the performance changes markedly in GTCC power plants depending on atmospheric conditions (temperature, pressure, humidity). In other words, when thermal efficiency changes, it is difficult to determine whether the cause is the change in external factors or that in the performance of the component. Therefore, we develop a method based on heat balance analysis to calculate the immeasurable quantity of state and the efficiency of each component in GTCC power plants, and to correct the performance of each component in a plant to a standard state using the performance function obtained from long-term operation data. Through the method, the analysis of the effects of deterioration factors on thermal efficiency becomes possible, and the performance of a plant can be simulated when the operation conditions are changed. Thus, we can determine the main factor that affects thermal efficiency using our method.
Sponsorship	International Gas Turbine Institute
Starting Page	733
Ending Page	738
Page Count	6
File Format	PDF
ISBN	9780791843963
DOI	10.1115/GT2010-22081
e-ISBN	9780791838723
Volume Number	Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Education; Electric Power; Manufacturing Materials and Metallurgy
Conference Proceedings	ASME Turbo Expo 2010: Power for Land, Sea, and Air
Language	English
Publisher Date	2010-06-14
Publisher Place	Glasgow, UK
Access Restriction	Subscribed
Subject Keyword	Energy consumption Temperature Carbon dioxide Combined cycles Maintenance Complex systems Pressure Thermal power stations Emissions Heat Gas turbines Power stations Thermal efficiency Combined cycle power stations
Content Type	Text
Resource Type	Article

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