Relevant bibliographies by topics / Revision of steam turbine

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Revision of steam turbine'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Revision of steam turbine"

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Abass, A. Z., D. A. Pavlyuchenko, A. M. Balabanov, and V. M. Less. "Inclusion of solar energy in iraq gas-turbine power plants as a method of solving the country's energy system shortage." Power engineering: research, equipment, technology 22, no. 2 (May 15, 2020): 98–107. http://dx.doi.org/10.30724/1998-9903-2020-22-1-98-107.

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At high ambient temperatures, the performance of gas turbine power plants drops significantly. Technical solutions of compensation for losses associated with the constant injection of water into the air intake of a gas turbine. This approach is not acceptable in regions with limited fresh water reserves. Radical solutions are required to reduce the cost of generated energy. Integrated Combined Solar Cycle (ISCCS) technology has proven itself on many projects. The addition of a combined cycle gas cycle with solar energy can significantly increase the overall efficiency of the power plant. Despite the increase in costs during the construction of its solar part, the total cost of operating solar collectors is several times less than a turbine installation. Given the global trend to fight carbon emissions, switching to a hybrid scheme is economically attractive. Trading in carbon credits for CO2 emissions will significantly reduce the payback period for the construction of gas turbine modernization under the ISCCS scheme. This paper presents an option to modernize a gas turbine power plant in the city of Basra (Iraq), using the advantages of solar radiation and recycling of combustion products from gas turbines. It is proposed to equip the existing 200 MW gas turbine plant with two steam turbine units with a capacity of 75 and 65 MW, working in conjunction with solar collectors producing low pressure water vapor. Due to modernization, the efficiency of the power plant should increase from 38% to 55%. The revision of the schematic and technical solutions of Iraq power plants will allow producing sufficient energy for the region.
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Iranzo, Alfredo. "CFD Applications in Energy Engineering Research and Simulation: An Introduction to Published Reviews." Processes 7, no. 12 (November 26, 2019): 883. http://dx.doi.org/10.3390/pr7120883.

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Computational Fluid Dynamics (CFD) has been firmly established as a fundamental discipline to advancing research on energy engineering. The major progresses achieved during the last two decades both on software modelling capabilities and hardware computing power have resulted in considerable and widespread CFD interest among scientist and engineers. Numerical modelling and simulation developments are increasingly contributing to the current state of the art in many energy engineering aspects, such as power generation, combustion, wind energy, concentrated solar power, hydro power, gas and steam turbines, fuel cells, and many others. This review intends to provide an overview of the CFD applications in energy and thermal engineering, as a presentation and background for the Special Issue “CFD Applications in Energy Engineering Research and Simulation” published by Processes in 2020. A brief introduction to the most significant reviews that have been published on the particular topics is provided. The objective is to provide an overview of the CFD applications in energy and thermal engineering, highlighting the review papers published on the different topics, so that readers can refer to the different review papers for a thorough revision of the state of the art and contributions into the particular field of interest.
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Chaibakhsh, Ali, and Ali Ghaffari. "Steam turbine model." Simulation Modelling Practice and Theory 16, no. 9 (October 2008): 1145–62. http://dx.doi.org/10.1016/j.simpat.2008.05.017.

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Riis, S. M. "STEAM TURBINE LUBRICATION." Journal of the American Society for Naval Engineers 42, no. 3 (March 18, 2009): 475–79. http://dx.doi.org/10.1111/j.1559-3584.1930.tb05736.x.

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Holcomb, Gordon R. "Steam Oxidation of Advanced Steam Turbine Alloys." Materials Science Forum 595-598 (September 2008): 299–306. http://dx.doi.org/10.4028/www.scientific.net/msf.595-598.299.

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Power generation from coal using ultra supercritical steam results in improved fuel efficiency and decreased greenhouse gas emissions. Results of ongoing research into the oxidation of candidate nickel-base alloys for ultra supercritical steam turbines are presented. Exposure conditions range from moist air at atmospheric pressure (650°C to 800°C) to steam at 34.5 MPa (650°C to 760°C). Parabolic scale growth coupled with internal oxidation and reactive evaporation of chromia are the primary corrosion mechanisms.
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Кондратьева, Екатерина, Ekaterina Kondrateva, Сергей Олейников, Sergey Oleynikov, Виктор Рассохин, Viktor Rassokhin, Алексей Кондратьев, Aleksey Kondratev, Александр Осипов, and Aleksandr Osipov. "STEAM TURBINE DEVELOPMENT FOR SUPERCRITICAL STEAM PARAMETERS." Bulletin of Bryansk state technical university 2017, no. 1 (March 31, 2017): 72–82. http://dx.doi.org/10.12737/24895.

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The paper reports the expediency and substantiation of the necessity for the gradual transition to power units on supercritical stream parameters in world power engineering. Basic stages in the development of steam turbine manufacturing with supercritical steam parameters are considered. The parameter increase at the input makes a profound impact upon the design of a flowing part of turbines. To operate a great difference in enthalpies in a cylinder without changing stages number one has to modernize them and sometimes to change the design completely. In the paper there is considered the expediency of the application of axial highloaded stages developed by the Polytechnics of Leningrad (LPI). There are also described the stages of designing steam turbine plants with critical and supercritical steam parameters at the input in a turbine. As an example there is analyzed SKR-100-300 steam turbine with the initial steam parameters of 29.4MPa and 650S. The results of solution computations directed to the efficiency increase of a regulatory stage of K-300-240 steam turbine with supercritical parameters of 580C and 29.0 MPa are presented. The application as a profile of an impeller the blade design of LPI allows increasing turbine plant efficiency in a wide range of mode parameters and also reducing a general number of turbine stages.
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Rice, I. G. "Steam-Injected Gas Turbine Analysis: Steam Rates." Journal of Engineering for Gas Turbines and Power 117, no. 2 (April 1, 1995): 347–53. http://dx.doi.org/10.1115/1.2814101.

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This paper presents an analysis of steam rates in steam-injected gas turbines (simple and reheat). In considering a gas turbine of this type, the steam-injection flow is separated from the main gas stream for analysis. Dalton’s and Avogadro’s laws of partial pressure and gas mixtures are applied. Results obtained provide for the accurate determination of heat input, gas expansion based on partial pressures, and heat-rejection steam-enthalpy points.
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Scaife, W. Garrett. "The Parsons Steam Turbine." Scientific American 252, no. 4 (April 1985): 132–39. http://dx.doi.org/10.1038/scientificamerican0485-132.

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Parsons, C. A. "THE MARINE STEAM TURBINE." Journal of the American Society for Naval Engineers 13, no. 2 (March 18, 2009): 432–42. http://dx.doi.org/10.1111/j.1559-3584.1901.tb03394.x.

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Meuth, H. "THE ELEKTRA STEAM TURBINE." Journal of the American Society for Naval Engineers 22, no. 2 (March 18, 2009): 402–16. http://dx.doi.org/10.1111/j.1559-3584.1910.tb05371.x.

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Dissertations / Theses on the topic "Revision of steam turbine"

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Trněný, Bohumil. "Oprava a rekonstrukce parní turbiny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230035.

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The content of this diploma thesis is proposal of repair, reconstruction of equipment and installation of electrohydraulic regulation of steam turbine. Thesis is given for specific case. At the beginning there is a basic description of repairing turbine. The next part of thesis deals with checking of main turbine parts and recalculation of gland steam. In the following part there is revisional report with repair or exchange suggestions of demaged turbine parts, followed by description of turbine regulation reconstruction. The last part deals with economical evaluation used innovation and recommendations for repairment procedure.
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Jelínek, Tomáš. "Oprava turbínové skříně." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-320107.

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This diploma thesis deals with the repair of a steam backpressure single-stage turbine. This thesis is assigned to a specific Spilling turbine case. A revisional report of this turbine with repair or exchange suggestions of demaged turbine parts is processed. In addition, a simulation of the contact pressure is carried out on the split plane of the housing. Structural modifications are designed and simulated to increase the parting plane's tightness. Further, the calculation of the tightening torque of the split plane is performed and a control thermodynamic and strength calculation of the labyrinth seals is performed.
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Hlavinka, Miloslav. "Rekonstrukce protitlakové parní turbiny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231818.

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Tématem diplomové práce je revize parní turbíny Mitsubishi a výpočet utahovacích momentů šroubů dělící roviny. Tato práce je rozdělena do několika částí. Úvodní část práce obsahuje seznámení s rozsahem prováděných servisních prací na parních turbínách. Poté je zde samotná revize parní turbíny Mitsubishi. Tato revize je dělena podle jednotlivých komponent turbíny. Poté je zde stanoven seznam nutných oprav a také seznam doporučených oprav pro příští odstávku. V další části je zde shrnut výpočet utěsnění dělicích rovin a to s nebo bez odlehčení. Dále jsou rozebrány nejčastěji používané typy závitů spojovacího materiálu parních turbín. Hlavní částí práce je samotný výpočet utahovacího momentu. Výstupem této práce je poté program pro výpočet utahovacího momentu v programu Excel.
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Holečková, Michaela. "Rekonstrukce parní kondenzační turbíny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254346.

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The aim of this master thesis is the retrofit of a condensing steam turbine. The thesis obtains a revision of the steam turbine, the reconstruction of steam turbine blades and the basic calculation of bolt torques of the turbine split plane. The master thesis is assigned to a specific retrofit of the steam turbine Lang. In the introductory part the thesis is focused on the turbine description and the basic functions of selected turbine components. The following part deals with the revision and the proposal of repairs for all components and the recommendation of additional modernizations of specific measuring equipments. The analysis of anchoring the stator and rotor blading and their reconstruction is discussed in the next part. In the last part the thesis focuses on the sealing of the turbine split plane and the calculation of the various bolt torques closely linked to the sealing.
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Grepl, Martin. "Revize parní turbíny a návrh oprav." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-316911.

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The theme of this master thesis is the revision and repair design of the condensing steam turbine SST 600 in Bielsko-Biala. The thesis deals with the revision of the steam turbine and the repair design of the damaged parts, the overall analysis of the separation of the steam of the split plane and the calculation of the parameters for tightening the new screws. The master thesis is given for a specific case. The introductory part of the master thesis deals with a basic description of the repaired steam turbine. Subsequently, a review of individual disassembled parts is given and the scope of the repairs is stated. In the next part of this thesis are summarized the causes of the steam leakage of the dividing plane at the points of the cross section and in the area of the control stage. The last part deals with the sealing problem of the split plane and the related main part of the master thesis is the calculation of the tightening parameters of bolts in the turbine housing. Another aim of the master thesis is to create drawings of the lightening of the split plane on turbine house.
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White, Alexander John. "Condensation in steam turbine cascades." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259523.

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Mitchell, K. C. "Weld repair of steam turbine rotors." Thesis, Swansea University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638208.

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Turbine rotors are among the most critical and highly stressed components in steam power plants. Although relatively few instances of catastrophic rotor bursts have occurred, they have resulted in lengthy forced outages and severe economic penalties to the affected utilities. To forestall the possibility of a catastrophic burst, utilities will retire the rotors affected, generally to the original equipment manufacturer's (OEM's) recommendations. The criteria and methodology for determining which rotors should be retired are proprietary and vary among manufacturers. If utilities could extend the life of these rotors by 10-20 years, then substantial savings would be made. The principal method for extending their life is weld repair and over the last 20 years, there has been a substantial increase in the number of repairs combined with the complexity of repair adopted. This project was designed to evaluate the relationship between microstructure and properties of welds on ex-service steam turbine rotor steels, after applying appropriate welding parameters and weld bead deposition sequence to minimise heat input and produce acceptable microstructures. From the project work, it is clear that the LP, IP and HP ex-service rotor forgings selected were representative of UK manufactured rotor forgings. Although never intended for weld repair, NP have demonstrated their ability to repair these steels successfully and produce weldments with acceptable microstructures and mechanical properties.
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Wakeley, Guy Richard. "The optimisation of steam turbine design." Thesis, University of Newcastle Upon Tyne, 1997. http://hdl.handle.net/10443/2041.

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The world market-place for steam turbine products is becoming increasingly competitive, and manufacturers must routinely produce designs which are extensively optimised whilst working within demanding tender and contract lead-times. The objective of the research work has been to develop a methodology whereby established turbomachinery analysis methods can be integrated within a framework of optimising algorithms. A rule-base, numerical optimisation, fuzzy logic, and genetic algorithms are used to optimise bladepath configurations, with particular emphasis on the minimisation of life-cycle operating costs. Significantly, automation of the design process is increased, design lead-times can be reduced, and performance improvements are predicted. The optimisation procedure relies on a sequential approach, with much emphasis placed on the iterative running of simple design codes. Simplified design methods are often reliant on correlated loss data to predict turbine performance, and in some cases this data is inaccurate or incomplete. An example of this is in the design of partially-admitted control stages, where little published data is available. It is suggested that CFD methods can, in some cases, be applied to derive new performance correlations or re-assess the validity of existing models. The application of an unsteady CFD solver to typical control stage geometries is presented in detail, and the approach is extended to include the development of a new control stage optimisation method.
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Ding, Bowen. "Aerodynamics of low pressure steam turbine exhaust systems." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/290137.

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The low pressure (LP) exhaust system presents a promising avenue for improving the performance of large steam turbines. For this reason, LP exhaust systems have attracted the attention of the research community for decades. Nevertheless, we still lack understanding of the flow physics and loss mechanisms in the exhaust system, especially at part-load conditions. It is also unclear how the exhaust system should be designed when its required operating range widens. This thesis provides solutions to these aerodynamic issues through experimental and numerical investigations, and provides tools that could contribute to better designs of LP exhaust systems. Firstly, the Computational Fluid Dynamics (CFD) solver ANSYS CFX was validated against experiments performed on a scaled test rig under representative part-load flow conditions. This validation exposed the weakness of Reynolds-averaged Navier-Stokes (RANS) CFD when there is a highly swirling flow and large separation regions in the exhaust diffuser. To facilitate the numerical studies, a series of tools were also developed. A design suite, ExhaustGen, was used to automate the pre- and post-processing of CFD calculations. The exhaust diffuser was parametrised using "Minimum Energy Curves", which reduce the dimension of parameter space. Further, a suitable stage-hood interface treatment (Multiple Mixing Planes) was chosen to predict the circumferentially non-uniform flow in the exhaust hood at low computational cost. Numerical investigation of the baseline geometry provided insights into the key flow features and loss mechanisms in the exhaust system, over a wide range of operating conditions. In particular, the bearing cone separation was identified as a key source of loss at part-load conditions. The effect of stage-hood interaction on the performance and design of the exhaust system was studied by varying the rotor blade design, which can positively influence system performance. Finally, a global sensitivity study was performed to identify the most influential design parameters of the exhaust hood. These findings allow, for the first time, LP exhaust hood performance maps to be constructed, so that the benefits of choosing a suitable hood geometry and blade design can be revealed. The thesis also offers contribution towards formulating LP exhaust system design guidance for a wide operating range.
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Topel, Monika. "Steam Turbine Thermal Modeling for Improved Transient Operation." Licentiate thesis, KTH, Kraft- och värmeteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156196.

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The growing shares of renewable energy sources in the market and solar thermal power applications have set higher requirements on steam turbine operation.These requirements are related to flexibility during transients. A key aspect sought of such flexibility is the capability for fast starts. Due to the varying temperature gradients during start-up, the speed at which the turbine can start is constrained by thermal stresses and differential expansion. These phenomena either consume component lifetime or may result in machine failure if not carefully controlled. In order to accomplish faster starts while ensuring that lifing requirements are preserved, it is important to analyze the thermal behavior of the machine. For this, a transient thermal model was developed with a focus on adaptability to different turbine sizes and geometries. The model allows for simple and fast prediction of thermo-mechanical properties within the turbine metal, more importantly, of the temperature distribution and the associated thermal expansion. The next step of this work was to validate the assumptions and simplifications of the model. This was done through the study and comparison of two turbines against measured operational data from their respective power plants. Furthermore,validation studies also included comparisons concerning the geometric detail level of the model. Overall, comparison results showed a large degree of agreement with respect to the measured data and between the geometric detail levels. The validated model was then implemented in studies related to reducing start-up times and peak differential expansion. For this, the potential effects of turbine temperature maintaining modifications were investigated and quantified.The modifications studied included: increasing gland steam pressure, increasing back pressure and increasing barring speed. Results yielded significant improvements starting from 9.5% in the start-up times and 7% in the differential expansion.

QC 20141128

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Books on the topic "Revision of steam turbine"

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Turbine steam path maintenance and repair. Tulsa, OK: PennWell Corp., 2001.

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Cotton, K. C. Evaluating and improving steam turbine performance. Rexford, N.Y: Cotton Fact, 1993.

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Kehlhofer, Rolf. Combined-cycle gas & steam turbine power plants. Lilburn, GA: Fairmont Press, 1991.

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A practical guide to steam turbine technology. New York: McGraw Hill, 1996.

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International Joint Power Generation Conference (1990 Boston, Mass.). Advances in steam turbine technology for power generation. New York, N.Y: American Society of Mechanical Engineers, 1990.

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Qi lun ji ci dian: Steam turbine dictionary. Beijing Shi: Hua xue gong ye chu ban she, 2009.

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Mahadzir, S. Energy analysis of steam turbine power generation systems. Manchester: UMIST, 1995.

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Savage, R. A. A study of wetness effects in steam turbine blading. Birmingham: University ofBirmingham, 1988.

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Mavromatis, S. D. Conceptual design and operation of industrial steam turbine networks. Manchester: UMIST, 1996.

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Mohsin, Rahmat. A theoretical investigation of the throughflow of nucleating steam in a low pressure steam turbine. Birmingham: University of Birmingham, 1999.

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Book chapters on the topic "Revision of steam turbine"

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El Hefni, Baligh, and Daniel Bouskela. "Steam Turbine Modeling." In Modeling and Simulation of Thermal Power Plants with ThermoSysPro, 283–95. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-05105-1_10.

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Hannon, James B. "Steam Turbine Oils." In Encyclopedia of Tribology, 3292–99. Boston, MA: Springer US, 2013. http://dx.doi.org/10.1007/978-0-387-92897-5_954.

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Armbruster, Stanley A. "Steam Turbine Generators." In Power Plant Engineering, 218–49. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0427-2_8.

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Denk, Josef. "Low Pressure Steam Turbine Integrity." In Materials for Advanced Power Engineering 1994, 157–70. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1048-8_9.

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Yang, Zongming, Huabing Wen, Xinglin Yang, Viktor Gorbov, Vira Mitienkova, and Serhiy Serbin. "Marine Steam Turbine Power Plants." In Marine Power Plant, 203–48. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4935-3_5.

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Ochkov, Valery, and Konstantin Orlov. "Nuclear Power Plant Steam Turbine Cycle." In Thermal Engineering Studies with Excel, Mathcad and Internet, 125–34. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26674-9_9.

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Akimoto, Hajime, Yoshinari Anoda, Kazuyuki Takase, Hiroyuki Yoshida, and Hidesada Tamai. "Gas Turbine Cycles and Steam Cycles." In An Advanced Course in Nuclear Engineering, 49–63. Tokyo: Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-55603-9_4.

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Rieger, N. F. "Damping Properties of Steam Turbine Blades." In CISM International Centre for Mechanical Sciences, 515–41. Vienna: Springer Vienna, 1988. http://dx.doi.org/10.1007/978-3-7091-2846-6_20.

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Berger, C., R. B. Scarlin, K. H. Mayer, D. V. Thornton, and S. M. Beech. "Steam Turbine Materials: High Temperature Forgings." In Materials for Advanced Power Engineering 1994, 47–72. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1048-8_4.

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Scarlin, R. B., C. Berger, K. H. Mayer, D. V. Thornton, and S. M. Beech. "Steam Turbine Materials: High Temperature Castings." In Materials for Advanced Power Engineering 1994, 73–88. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1048-8_5.

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Conference papers on the topic "Revision of steam turbine"

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Urbach, Herman B., Donald T. Knauss, Richard W. Garman, Ashwani K. Gupta, and Michael R. Sexton. "A Steam-Augmented Gas Turbine With Reheat Combustor for Surface Ships." In ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/97-gt-254.

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The steam-augmented gas turbine (SAGT) differs from commercial steam-injected gas turbines where steam flow may be considerably less than 15% of air flow. SAGT combustors may operate near stoichiometric combustion conditions with steam flow as high as 50% of air flow, thus achieving specific powers exceeding 555 hp-sec/lb. A previous simulation study of the steam-augmented gas turbine, which did not include compressor and turbine maps, examined the applicability of the concept in the Navy’s DDG-51-class ship environment. In this re-examination, component maps were employed to establish credible off-design engine performance, and to confirm estimates of overall ship fuel requirements based solely on anticipated component efficiencies. Also, the present simulation employs a heat-exchanger sub-program fully integrated into the main software program. The re-examination has led to several revisions and refinements of previous conclusions, which are discussed in the text. The SAGT engine concept described herein, dispenses with intercoolers, but adds a low-pressure reheat combustor. The low-pressure combustor flame temperature exceeds 2700° F, which analyses show to be stable. Exhaust gas temperatures are not permitted to fall below 450° F, and the heat recovery steam generator is designed to hold feedwater temperatures close to 300° F to avoid the gas-side acid dewpoint. At the most efficient operating points, the efficiency of this new reheat SAGT engine exceeds 44.5% with a 2200° F turbine inlet temperature, at an ambient 100°-F temperature. Moreover, it exhibits a 23% reduction in overall system volume. Simulation data show that the maximum efficiency of the SAGT engine peaks at engine powers required for cruising speeds, in contrast to the efficiency of the LM2500, which peaks at full-throttle. Since Navy ships operate near cruise conditions for the majority of their mission time, a SAGT plant uses 29% less fuel than the baseline LM2500 plant. Moreover, employing conservative cost estimates, the SAGT plant is quite competitive on a first-acquisition cost basis with gas turbines currently in the fleet.
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Suzuki, Yutaka, Kunihiko Sato, Hirohide Iiizumi, Masakazu Hisatsune, and Shigenobu Onishi. "Development of an Evaluation Method for Seismic Isolation Systems of Nuclear Power Facilities: Part 1 — The Work Schedule of Project and a Seismic Design of Crossover Piping System." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-29035.

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This paper provides a part of series of “Development of an Evaluation Method for Seismic Isolation Systems of Nuclear Power Facilities” [1]–[4]. This part describes the work schedule of this project and the summary of a seismic design for crossover piping system. Since the Southern Hyogo Prefecture Earthquake in 1995, a seismic isolated design has been widely adopted for Japanese typical buildings. The Japanese government accepted utilizing seismic isolation technology for nuclear power facilities with the 2006 revision of the “Regulatory Guide for Reviewing Seismic Design of Nuclear Power Reactor Facilities”. Under these backgrounds, the Japan national project with the participation of all electric power companies and reactor vendors has been started from 2008 to develop seismic isolation systems of nuclear power facilities under the support of the Ministry of Economy, Trade and Industry. In the design of seismic isolated plant, the crossover piping systems, such as Main Steam line and other lines related to the safety system have the important roles for overall plant safety. Therefore, the design of multiply supported piping systems between isolated and non-isolated buildings is one of the major key issues. This paper focuses on the seismic response analysis of Main Steam crossover piping between seismic isolated Reactor Building and non-isolated Turbine Building. Multiple input response spectra and time history analyses of the crossover piping have been performed and the structural integrity of piping and the validity of the multiple input analysis method have been verified based on comparisons with the results obtained by conventional response spectrum analysis using enveloped floor response spectrum.
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Campanari, Stefano, and Matteo Gazzani. "High Efficiency SOFC Power Cycles With Indirect Natural Gas Reforming and CO2 Capture." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26851.

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Driven by the search for the highest theoretical efficiency, several studies have investigated in the last years the adoption of fuel cells in the field of power production from natural gas with CO2 capture. Most of the proposed power cycles rely on high temperature fuel cells, namely Solid Oxide Fuel Cells (SOFC) and Molten Carbonate Fuel Cells (MCFC), based on the concept of hybrid fuel cell plus gas turbine cycles. Accordingly, high temperature fuel cells are integrated with a simple or modified Brayton cycle. As far as SOFC are concerned, two main plant solutions can be identified depending on the integration with the natural gas reforming/shift section: (i) systems where natural gas is — partially or totally — internally reformed in the fuel cell and (ii) systems where natural gas is reformed before the fuel cell and the cell is fed with a high hydrogen syngas. In both cases, CO2 can be separated downstream the fuel cell via a range of available technologies, e.g. chemical or physical separation processes, oxy-combustion and cryogenic methods. Following a literature review on very promising plant configurations, this work investigates the advantages and limits of adopting an external natural gas conversion section with respect to the plant efficiency. As a reference plant we considered a power cycle proposed by Adams and Barton [8], whose performance is the highest found in literature for SOFC-based power cycles, with 82% LHV electrical efficiency. It is based on a pre-reforming concept where fuel is reformed ahead the SOFC which thus works with a high hydrogen content fuel. This plant was firstly reproduced considering all the ideal assumptions proposed by the original authors. As second step, the simulations were focused on revising the power cycle, implementing a complete set of assumptions about component losses and more conservative operating conditions about fuel cell voltage, heat exchangers minimum temperature differences, maximum steam temperature, turbomachinery efficiency, component pressure losses and other adjustments. Considering the consequent modifications with respect to the original layout, the net electric efficiency changes to around 66% LHV with nearly complete (95%+) CO2 capture, a still remarkable but less attractive value, while requiring a very complex and demanding heat exchangers network. Detailed results are presented in terms of energy and material balances of the proposed cycles. All the simulations have been carried out with the proprietary code GS, developed by the GECOS group at Politecnico di Milano.
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Kirkpatrick, Thomas K., Bernard J. Pastorik, and Wesley M. Newland. "Fixed Duct Burner Heat Input Approach for Combined Cycle Power Plant ASME PTC 46 Performance Testing." In ASME 2011 Power Conference collocated with JSME ICOPE 2011. ASMEDC, 2011. http://dx.doi.org/10.1115/power2011-55149.

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Since its publication in 1996, ASME PTC 46 Performance Test Code on Overall Plant Performance has established itself as the premier test code for conducting overall plant performance within the power industry, especially for combined cycle power plants. The current text within ASME PTC 46, which is currently under revision by the ASME PTC 46 Committee, describes in Section 5.3.4 Specified Measured Net Power that “This test is conducted for a combined cycle power plant with duct firing or other form of power augmentation, such as steam or water injection when used for that purpose.” Further, the only example problem for a combined cycle with duct firing is provided in Appendix B of the code utilizing the Specified Measured Net Power Test Method. Though the text and example are correctly presented within the code, it resulted in misinterpretation within the industry that the only correct way to test a combined cycle plant with duct firing was to conduct a Specified Measured Net Power Test. Though the Specified Measured Net Power Test Method is an acceptable and accurate method in determining the performance of a combined cycle plant with duct firing in operation, it lends to being inflexible to the weather conditions for the plant operation. When the weather is too cold, the exhaust energy from the combustion turbines may be at such a magnitude as to not allow the duct burners to be fired due to limitations within the heat recovery steam generator and steam turbine systems to take the load, thus limiting the plant testing to take place when the weather is warm enough to allow the plant to be operated with duct firing. The opposite condition can also exist where the ambient conditions are too hot so that the duct burner capacity is unable to achieve the specified measured net power allowing the test to be conducted. The limitations stated herein are the reasons that an alternative approach with more flexibility is necessary. This paper will present an alternative approach referred to as the Fixed Duct Burner Heat Input Test Method to testing combined cycle plants where the duct burner heat input (Fuel Flow) is held fixed while the plant net power and heat rate are left to float with ambient conditions. Corrections for both power and heat rate will be developed for ambient conditions per ASME PTC 46 guidelines. This paper will further present a comparison between the Specified Measured Net Power Test Method and the Fixed Duct Burner Heat Input Test Method in the areas of the flexibility of the methods for various ambient conditions, and the method uncertainty associated with each method’s ability to correct to reference conditions.
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Hubka, Lukas, and Petr Skolnik. "Steam turbine and steam reheating simulation model." In 2013 International Conference on Process Control (PC). IEEE, 2013. http://dx.doi.org/10.1109/pc.2013.6581378.

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Cioffi, Deborah H. "Increasing Steam Turbine Capacity." In ASME 2004 Power Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/power2004-52160.

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Steam turbine owners are often searching for opportunities to increase power output. Increases in steam turbine flow capacity yield a proportional increase in power output, but there is more to increasing capacity than just opening up nozzle areas. This paper describes how Mechanical Dynamics and Analysis personnel increased the flow capacity and power output using original blading on a large, supercritical, reheat unit while maintaining a high level of efficiency. Much attention was given to the as-left stage properties in order to minimize the change in efficiency from the design levels. The work is documented using a timeline which centers on the outage. Much of the engineering work done prior to the outage minimized the time necessary during the outage to complete the modifications. Before and after test results demonstrate the cost-benefit of the capacity increase.
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Yang, Haisheng, and Shuping Chang. "Application of Steam Turbine Steam Path Evaluation Technology." In 2012 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC). IEEE, 2012. http://dx.doi.org/10.1109/appeec.2012.6307054.

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Peters, Daniel T., Eric Jones, Sean Hastings, and Steven Greco. "Turbine Steam Chest Life Assessment." In ASME 2010 Power Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/power2010-27248.

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The optimal approach to condition assessment, regardless of the component involved, is to use a programmatic approach, and steam chest condition assessment is no exception. Steam chests typically vary significantly from one to the next in shape and complexity; consequently, stress distributions vary and damage occurs first and is most advanced at the high stress regions, accordingly. One of the most significant cost drivers in an overall program is an ongoing implementation of NDE that has little technical justification, i.e., implementing NDE as the means of identifying the high stress locations via flaw detection. Keep in mind that flaws can manifest themselves at both macro and micro levels. Therefore, inspection typically includes surface inspection using liquid dye penetrant and/or magnetic particle inspection for macro damage and metallographic replication for micro damage, plus ultrasonic inspection for volumetric inspection of subsurface flaws and flaws at otherwise inaccessible surfaces. In a programmatic approach, the first step is to accurately understand the stresses of the steam chest to determine the appropriate areas requiring examination and monitoring. Then, only after identifying the critical areas on the steam chest, attention turns to defining the optimal techniques and procedures to examine the areas identified. By implementing a focused inspection that concentrates on the critical areas, as opposed to a shotgun approach, the scope, cost, and the frequency of the inspection is significantly reduced. The programmatic approach identifies these critical areas up front and helps to determine the best method for their inspection. The best method is most often dictated by access constraints and limitations at the region of interest. In recent years, significant strides have been made in the use of advanced UT techniques such as linear phased array (LPA) and annular phased array (APA) ultrasonic inspection for sizing cracks in some of the least accessible areas. In many cases, once identified, the damage can subsequently be monitored periodically with only the local removal of insulation. The disassembly of the valve is not required on an on-going basis, nor is full insulation removal in most cases. Finally, once damage has been identified and characterized, be it early form cavitation through to defined cracks, the model used initially to identify the inspection locations is then used to assess the damage in terms of growth rates and failure potential. This information is utilized for a complete Fitness for Service Assessment of the unit. This would include definition of re-inspection intervals, monitoring requirements, and possibly to assess repair/replace options and schedules. These assessments meet the requirements of current Standards in Fitness for Service Assessment. The robust life assessment program presented here includes: 1. upfront analysis of the steam chest to identify problem areas including modeling of the valve, 2. focused baseline inspection of identified potential problem areas, 3. Fitness for Service Analysis utilizing focused baseline inspection results, 4. continued monitoring of critical areas of the valve. This programmatic approach results in a focused, optimized integrity assessment program at minimized cost.
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Reed, Douglas D. "Determining Steam Turbine Inspection Intervals." In ASME 2010 Power Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/power2010-27305.

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Steam turbine maintenance intervals have been extended from the Original Equipment Manufacturers’ (OEM) recommended intervals over the last 20 years. Inspections in which the casing is completely opened have been pushed to 10 years or longer on units with OEM recommended intervals of 5 to 6 years. This has been made possible because of additional data monitoring and in place inspection techniques which allow the internal condition of the unit to be assessed without opening the casing. Risk-based computer modeling and analysis techniques have allowed us to predict safe extended component inspection intervals using fracture mechanics. This paper gives a systematic approach to determining the condition of a steam turbine based on past history and current measured parameters. It provides a discussion of the effects of changes to components and how to determine and rank risk factors. Also discussed are results of inspections of machines which have been opened after extended intervals.
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Nagel, Christof. "Steam Turbine Condition Monitoring (TCM)." In ASME 2007 Power Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/power2007-22062.

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Interest in online turbine condition monitoring has increased among utilities in order to minimize unforeseen standstills and for better planning of overhauls or repair work. The AMODIS® (ALSTOM Monitoring and Diagnostic System) Steam Turbine Condition Monitoring system monitors steam turbines locally or remotely via long distances [1]. The system also collects all data to compare current events with past events. This monitoring system is not an expert system recommending how to solve malfunctions. It is more a system which helps operators to take measures before the standard alarm or turbine trip is activated. An interlock of the process parameters generates early warning alarms which are based on the OEM experience and help operators to get a clear picture of an arising problem and to react early enough to avoid forced outages. Additional sensors for additional process parameters have to be installed. The system is part of the AMODIS plant monitoring system and consists of six separately available modules: • Steam inlet valves: To detect increased friction in the actuator and the steam valve guide. • Jacking oil and turning gear: To detect malfunction in the jacking oil and turning gear systems. • Bearing supervision: To detect possible tilting of the bearing pedestal or abnormal oil consumption. • Thermal expansion: To detect extreme or abnormal differential expansion and to detect expansion hindrance. • Thermal efficiency: To detect loss of internal efficiency at an early stage. • Lube oil condition monitoring: To monitor the oil with an online particle counter and a sensor for content of water. All modules can be supplied separately. Modules to check vibration and performance are also available in an AMODIS system but are not covered in this paper.
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Reports on the topic "Revision of steam turbine"

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Viswanathan, R., J. Hawk, R. Schwant, D. Saha, T. Totemeier, S. Goodstine, M. McNally, D. B. Allen, and Robert Purgert. Steam Turbine Materials for Ultrasupercritical Coal Power Plants. Office of Scientific and Technical Information (OSTI), June 2009. http://dx.doi.org/10.2172/1081317.

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Sterzinger, G. J. Integrated gasification combined cycle and steam injection gas turbine powered by biomass joint-venture evaluation. Office of Scientific and Technical Information (OSTI), May 1994. http://dx.doi.org/10.2172/10145278.

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Burgin, Jillian Elizabeth. Stormwater Pollution Prevention Plan, TA-03-22 Power and Steam Plant, Revision 4: LANS Archived 2019. Office of Scientific and Technical Information (OSTI), May 2019. http://dx.doi.org/10.2172/1508541.

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Shen, Chen. Modeling Creep-Fatigue-Environment Interactions in Steam Turbine Rotor Materials for Advanced Ultra-supercritical Coal Power Plants. Office of Scientific and Technical Information (OSTI), April 2014. http://dx.doi.org/10.2172/1134364.

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Kercel, S. W., M. L. Simpson, M. Azar, and M. Young. An optical technique for characterizing the liquid phase of steam at the exhaust of an LP turbine. Office of Scientific and Technical Information (OSTI), June 1993. http://dx.doi.org/10.2172/10165558.

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Boardman, J. R. Operating experience feedback report: Reliability of safety-related steam turbine-driven standby pumps. Commercial power reactors, Volume 10. Office of Scientific and Technical Information (OSTI), October 1994. http://dx.doi.org/10.2172/91936.

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Suk Kim, Jong, Michael McKellar, Shannon M. Bragg-Sitton, and Richard D. Boardman. Status on the Component Models Developed in the Modelica Framework: High-Temperature Steam Electrolysis Plant & Gas Turbine Power Plant. Office of Scientific and Technical Information (OSTI), October 2016. http://dx.doi.org/10.2172/1333156.

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Burgin, Jillian Elizabeth. Stormwater Pollution Prevention Plan for the TA-03-22 Power and Steam Plant, Los Alamos National Laboratory, Revision 3, January 2018. Office of Scientific and Technical Information (OSTI), February 2018. http://dx.doi.org/10.2172/1419726.

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Burgin, Jillian Elizabeth. Stormwater Pollution Prevention Plan for the TA-03-22 Power and Steam Plant, Los Alamos National Laboratory, Revision 3 Final, January 2018. Office of Scientific and Technical Information (OSTI), March 2018. http://dx.doi.org/10.2172/1429985.

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Evenson, Grant. Addendum to the Closure Report for Corrective Action Unit 339: Area 12 Fleet Operations Steam Cleaning Discharge Area, Nevada Test Site, Revision 0. Office of Scientific and Technical Information (OSTI), May 2009. http://dx.doi.org/10.2172/953356.

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