Search Results for combustion turbines
.... This is called the Otto cycle. In the case of a steam turbine system, the combustion gas is used to boil water inside a heat exchanger; the compression is achieved by pumping the inlet water. The compressed steam is then allowed to expand through a turbine, and it is condensed by a condenser at the turbine...
... incinerators. Boilers are affected by stress rupture failures, waterside corrosion failures, fireside corrosion failures, and environmental cracking failures. Contamination of combustion fuel in diesel engines can cause high-temperature corrosion. Gas turbine engines are affected by hot corrosion. Refractory...
By Steven Kushnick
.... The engineering design process for a combustion turbine engine, however, is at the opposite end of the spectrum. The first step in the process begins with task clarification that leads to a design specification. That document is negotiated with inputs from: Specialized engineering departments (including...
The intent of this article is to assist the failure analyst in understanding the underlying engineering design process embodied in a failed component or system. It begins with a description of the mode of failure. This is followed by a section providing information on the root cause of failure. Next, the article discusses the steps involved in the engineering design process and explains the importance of considering the engineering design process. Information on failure modes and effects analysis is also provided. The article ends with a discussion on the consequence of management actions on failures.
... Induced-Draft Fan Seals Chimney Stacks In recent years gas turbines fueled on natural gas have become increasingly popular. To increase the total efficiency and the versatility of gas turbine powered installations, the hot exhaust gases from the combustion turbine, at temperatures in excess of 500...
... than a typical creep failure. The design metal temperatures of gas turbine components are significantly lower than the melting point of the materials of construction. Accordingly, cases of component melting have been a result of process upsets related to combustion and cooling systems...
... usefulness. Combustion turbine hot section rotating blades are fabricated from nickel-base superalloys and operate at high temperatures and aggressive environments. Both metallurgical and mechanical property degradation of the blading material occurs during service, which can limit the useful service life...
... Rotor Blades of an Industrial Gas Turbine Engine , Advanced Materials and Coatings for Combustion Turbines , Swaminathan V.P. and Cheruvu N.S. , Ed., ASM International , 1994 , p 135 Selected References Selected References Articles in Surface Engineering, Volume 5...
... for Chemically Cleaning Turbines,” U.S. Patent No. 6,311,704 , 2001 • Foster C.D. , “Methods for Foam Cleaning Combustion Turbines,” U.S. Patent No. 6,478,033 , 2002 • Foster C.D. , “Manifold for Use in Cleaning Combustion Turbines,” U.S. Patent No. 6,491,048 , 2002...
...., wood, straw, or fast-growing energy crops), and each has its own issues, generally in the form of corrosion and/or erosion of the heat-exchanging surfaces by the combustion products ( Ref 9 ). Corrosion issues in biomass gasification plants that are used to fire gas turbines are similar to those...
...-speed applications in which near-zero clearance between moving parts is required. Abradable seals are used on shroud sections of compressor and turbine areas in the IGT engine ( Ref 14 ). Combustion-sprayed nickel-graphite abradable coatings have been used in IGT compressors for many years. For more...
... turbines Table 24 Thermal conditions in future gas turbines Component Gas temperature, base load Gas temperature after trip Heat transfer coefficient °C °F °C °F Btu/ft · h · °C W/m 2 · K Combustion chamber 1500 2730 600 1110 170–290 300–500 Transition duct 1350–1500...
... ). Resistance against corrosion in oxidizing, sulfidizing, and chloridizing environments can be achieved only by formation of a stable, slow-growing, dense oxide layer. Hot corrosion is a serious problem in power generation equipment, gas turbines, internal combustion engines, fluidized bed combustion...
... loss to improve fuel consumption, because it is a large percentage of overall loss in an automobile, as shown previously in Fig. 2 . Thermal barrier coatings (TBCs) have a track record in airplanes, gas turbine engines, military motor vehicles, and so on, and applications of TBCs to engine combustion...
... thermal spray gases Table 2 Properties of common thermal spray gases Gas Formula Specific gravity Density Heat of combustion Maximum temperature Flame velocity in air Flame velocity in O 2 Lower explosive limit in air, % Upper explosive limit in air, % kg/m 3 lb/ft 3 kJ/m 3...
... typically include blades, vanes, combustion chambers, and exit nozzles. These parts applied on hot zones are coated with bilayers or multilayers of different and specific materials, which perform different functions during turbine operation. These coatings are known as thermal barrier coatings (TBCs...