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Exploration of Construction Organization for Maintenance of Steam Turbine Equipment in Thermal Power Plants
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作者 Zhu Yang 《Journal of Electronic Research and Application》 2024年第4期148-153,共6页
The continuous development of the power industry has had a positive impact on thermal power plants,helping them maintain a good production form.In the use of steam turbine equipment in thermal power plants,to prolong ... The continuous development of the power industry has had a positive impact on thermal power plants,helping them maintain a good production form.In the use of steam turbine equipment in thermal power plants,to prolong its lifespan and avoid safety hazards,it is necessary to pay attention to strengthening maintenance and construction organization,better implementing effective organizational work,and effectively applying steam turbine equipment to ensure the sustainable development of thermal power plants.This article discusses the concept of equipment maintenance from the perspective of steam turbine equipment in thermal power plants,analyzes the current situation of equipment maintenance,and proposes a specific construction organization to provide a reference for steam turbine equipment maintenance. 展开更多
关键词 Thermal power plant steam turbine equipment Construction organization
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Numerical investigation on the flow and power of small-sized multi-bladed straight Darrieus wind turbine 被引量:10
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作者 JIANG Zhi-chao DOI Yasuaki ZHANG Shu-you 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2007年第9期1414-1421,共8页
Straight Darrieus wind turbine has attractive characteristics such as the ability to accept wind from random direction and easy installation and maintenance. But its aerodynamic performance is very complicated,especia... Straight Darrieus wind turbine has attractive characteristics such as the ability to accept wind from random direction and easy installation and maintenance. But its aerodynamic performance is very complicated,especially for the existence of dynamic stall. How to get better aerodynamic performance arouses lots of interests in the design procedure of a straight Darrieus wind turbine. In this paper,mainly the effects of number of blades and tip speed ratio are discussed. Based on the numerical investigation,an assumed asymmetric straight Darrieus wind turbine is proposed to improve the averaged power coefficient. As to the numerical method,the flow around the turbine is simulated by solving the 2D unsteady Navier-Stokes equation combined with continuous equation. The time marching method on a body-fitted coordinate system based on MAC (Marker-and-Cell) method is used. O-type grid is generated for the whole calculation domain. The characteristics of tangential and normal force are discussed related with dynamic stall of the blade. Averaged power coefficient per period of rotating is calculated to evaluate the eligibility of the turbine. 展开更多
关键词 small-sized Straight Darrieus wind turbine Multi-bladed Power coefficient
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Study on Contra-Rotating Small-Sized Axial Flow Hydro Turbine 被引量:2
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作者 Ryosuke Sonohata Junichiro Fukutomi Toru Toru Shigemitsu 《Open Journal of Fluid Dynamics》 2012年第4期318-323,共6页
It is thought that small hydropower generation is alternative energy, and the energy potential of small hydropower is large. The efficiency of small hydro turbines is lower than that of large one, and these small hydr... It is thought that small hydropower generation is alternative energy, and the energy potential of small hydropower is large. The efficiency of small hydro turbines is lower than that of large one, and these small hydro turbine’s common problems are out of operation by foreign materials. Then, there are demands for small hydro turbines to keep high per- formance and wide flow passage. Therefore, we adopted contra-rotating rotors which can be expected to achieve high performance and low-solidity rotors with wide flow passage in order to accomplish high performance and stable opera- tion. Final goal on this study is development of an electric appliance type small hydro turbine which has high portability and makes an effective use of the unused small hydro power energy source. In the present paper, the performance and the internal flow conditions in detail of contra-rotating small-sized axial flow hydro turbine are shown as a first step of the research with the numerical flow analysis. Then, a capability adopting contra-rotating rotors to an electric appliance type small hydro turbine was discussed. Furthermore, the high performance design for it was considered by the numeri- cal analysis results. 展开更多
关键词 small-sized AXIAL turbine Contra-Rotating ROTOR Electric APPLIANCE RENEWABLE Energy Internal Flow
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Analysis and Online Diagnosis on Plugging Fault of Servo Valve in Electro-hydraulic Regulating System of Steam Turbine 被引量:6
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作者 WANG Xuanyin LI Xiaoxiao LI Fushang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2009年第2期233-237,共5页
Through the study on the output signals of the electro-hydraulic regulating system in the thermal power plant, a novel method for online diagnosis of the plugging fault in the servo valve is presented. With the use of... Through the study on the output signals of the electro-hydraulic regulating system in the thermal power plant, a novel method for online diagnosis of the plugging fault in the servo valve is presented. With the use of the AMESIM software, the changes of the piston displacement, the oil pressure, the magnitude attenuation and the phase lag of the system under different plugging states are studied after simulation. Besides, the influences of the symmetrical and unsymmetrical plugging on the system are also compared and the characteristic table is given. The duo-neural network is put forward to achieve an online diagnosis on the plugging fault of the servo valve. The first level of network helps to make the qualitative diagnosis of the plugging position while the second level is for the quantitative diagnosis of the degree of the plugged position. The research results show that plugging at different positions exerts different influences on the performance of the system. The unsymmetrical plugging mainly affects the regulation time while the symmetrical plugging leads to great changes in the magnitude attenuation and the phase lag. 展开更多
关键词 steam turbine regulating system plugging diagnosis AMESIM software
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Optimum Tilt Angle of Flow Guide in Steam Turbine Exhaust Hood Considering the Effect of Last Stage Flow Field 被引量:4
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作者 Lihua CAO Aqiang LIN +1 位作者 Yong LI Bin XIAO 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2017年第4期866-875,共10页
Abstract Heat transfer and vacuum in condenser are influenced by the aerodynamic performance of steam tur- bine exhaust hood. The current research on exhaust hood is mainly focused on analyzing flow loss and optimal d... Abstract Heat transfer and vacuum in condenser are influenced by the aerodynamic performance of steam tur- bine exhaust hood. The current research on exhaust hood is mainly focused on analyzing flow loss and optimal design of its structure without consideration of the wet steam condensing flow and the exhaust hood coupled with the front and rear parts. To better understand the aerodynamic performance influenced by the tilt angle of flow guide inside a diffuser, taking a 600 MW steam turbine as an example, a numerical simulator CFX is adopted to solve compressible three-dimensional (3D) Reynolds time-aver- aged N-S equations and standard k-e turbulence model. And the exhaust hood flow field influenced by different tilt angles of flow guide is investigated with consideration of the wet steam condensing flow and the exhaust hood coupled with the last stage blades and the condenser throat. The result shows that the total pressure loss coefficient and the static pressure recovery coefficient of exhaust hood change regularly and monotonously with the gradual increase of tilt angle of flow guide. When the tilt angle of flow guide is within the range of 30~ to 40~, the static pressure recovery coefficient is in the range of 15.27% to 17.03% and the total pressure loss coefficient drops to approximately 51%, the aerodynamic performance of exhaust hood is significantly improved. And the effectiveenthalpy drop in steam turbine increases by 0.228% to 0.274%. It is feasible to obtain a reasonable title angle of flow guide by the method of coupling the last stage and the condenser throat to exhaust hood in combination of the wet steam model, which provides a practical guidance to flow guide transformation and optimal design in exhaust hood. 展开更多
关键词 steam turbine Exhaust hood Last stageblades Tilt angle of flow guide Aerodynamicperformance
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Numerical Simulation of Water Droplets Deposition on the Last-Stage Stationary Blade of Steam Turbine 被引量:3
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作者 Danmei Xie Xinggang Yu +3 位作者 Wangfan Li Youmin Hou Yang Shi Sun Cai 《Energy and Power Engineering》 2010年第4期248-253,共6页
Based on the method of discrete phase, the law of droplets’ deposition in the last stage stationary blade of a supercritical 600 MW Steam Turbine is simulated in the first place of this paper by using the Wet-steam m... Based on the method of discrete phase, the law of droplets’ deposition in the last stage stationary blade of a supercritical 600 MW Steam Turbine is simulated in the first place of this paper by using the Wet-steam model in commercial software FLUENT, where the influence of inlet angle of water droplets of the stationary blades is also considered. Through the calculation, the relationship between the deposition and the diameter of water droplets is revealed. Then, the amount of droplets deposition in the suction and pressure surface is derived. The result is compared with experimental data and it proves that the numerical simulation result obtained in this paper is reasonable. Finally, a formula of the relationship between the diameter of water droplets and the inlet angle is fit, which could be used for approximate calculation in the engineering applications. 展开更多
关键词 steam turbine STATIONARY BLADE Wet steam Water Droplets DEPOSITION Discrete Phase Numerical Simulation
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Modeling and Optimization of the Steam Turbine Network of an Ethylene Plant 被引量:4
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作者 李泽秋 赵亮 +1 位作者 杜文莉 钱锋 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2013年第5期520-528,共9页
In this paper,we developed a hybrid model for the steam turbines of a utility system,which combines an improved neural network model with the thermodynamic model.Then,a nonlinear programming(NLP) model of the steam tu... In this paper,we developed a hybrid model for the steam turbines of a utility system,which combines an improved neural network model with the thermodynamic model.Then,a nonlinear programming(NLP) model of the steam turbine network is formulated by utilizing the developed steam turbine models to minimize the total steam cost for the whole steam turbine network.Finally,this model is applied to optimize the steam turbine network of an ethylene plant.The obtained results demonstrate that this hybrid model can accurately estimate and evaluate the performance of steam turbines,and the significant cost savings can be made by optimizing the steam turbine network operation at no capital cost. 展开更多
关键词 hybrid model steam turbine network utility system economic objective
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Research on new type of fast-opening mechanism in steam turbine regulating system and optimization of operation tactic 被引量:2
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作者 Xiao-xiao LI Xuan-yin WANG Fu-shang LI 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2008年第5期633-639,共7页
With the analysis on regulating system in 200 MW steam turbine, the necessity of appending the fast-opening function to the original system is set forth and a new type of fast-opening mechanism is devised. The mathema... With the analysis on regulating system in 200 MW steam turbine, the necessity of appending the fast-opening function to the original system is set forth and a new type of fast-opening mechanism is devised. The mathematical model of system is built up. With the use of AMESIM software, the displacement curve of the piston, the force curve of the cartridge valve spool, the pressure curve and the flux curve in the regulation process are obtained based on simulation. The performances of three fast-opening systems composed of cartridge valves with different diameters are compared. Based on the analysis on factors that affect the execution time of fast-opening, the dead zone of the fast-opening system is put forward. To overcome the defect, dif- ferent operation modes are adopted for different zones. The result shows that with the increase of the valve diameter, the regulating time in the dead zone significantly exceeds the fast-opening time in the whole journey. Accordingly, the optimization operation tactic in the dead zone and the qualification conditions are brought forward. The fast-opening system composed of 32 mm cartridge valves is taken as an example with use of the tactic. The simulation result shows that the maximum regulating time is shortened by 509 ms. 展开更多
关键词 steam turbine Fast-opening Regulating system AMESIM
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Study on Valve Management of DEH for Steam Turbine 被引量:2
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作者 Changjie Yin Jizhen Liu 《Energy and Power Engineering》 2013年第4期319-323,共5页
Valve management is one of the major functions of DEH for steam turbine. It has an important practical significance for the security and economy of the steam turbine. This paper starts from the valve configuration fig... Valve management is one of the major functions of DEH for steam turbine. It has an important practical significance for the security and economy of the steam turbine. This paper starts from the valve configuration figure of the domestic-type 300 MW steam turbine, and then makes a simple comparison between the two types of valve governing modes. In order to realize the valve control, the structure of control system has been established, in which the roles of the mathematical functions are discussed. On the basis of the experiment of valve flow characteristic, this article carries out a quantitative study on the functions of the valve management and the parameter tuning method. Through a serious corrections, the sequence valve flow characteristic curve is obtained, which can provide significant guidance on the research of valve management of the similar steam turbines. 展开更多
关键词 VALVE Management steam turbine Digital ELECTRO-HYDRAULIC Control System VALVE Flow CHARACTERISTIC
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Vibrations measurements for shrouded blades of steam turbines based oneddy current sensors with high frequency response 被引量:4
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作者 YE De-chao DUAN Fa-jie +3 位作者 ZHOU Qi CHENG Zhong-hai LI Xu NIU Guang-yue 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2019年第4期315-321,共7页
With the development of power plants towards high power and intelligent operation direction,the vibrations or failures of blades,especially the last stage blades in steam turbines,happen more frequently due to the uns... With the development of power plants towards high power and intelligent operation direction,the vibrations or failures of blades,especially the last stage blades in steam turbines,happen more frequently due to the unstable operating conditions brought by flexible operation.A vibration measuring method for the shrouded blades of a steam turbine based on eddy current sensors with high frequency response is proposed,meeting the requirements of non-contact heath monitoring.The eddy current sensors produce the signals which are related to the area changing of every blade’s shroud resulting from the rotation of stator.Then an improved blade tip timing(BTT)technique is proposed to detect the vibrations of shrouded blades by measuring the arrival time of each area changing signal.A structure of eddy current sensors is developed in steam turbines and an amplitude modulation/demodulation circuit is designed to improve the response bandwidth up to 250 kHz.Vibration tests for the last stage blades of a steam turbine were carried out and the results validate the efficiency of the improved BTT technique and the high frequency response of the eddy current sensors presented. 展开更多
关键词 steam turbine blade vibration measurement eddy current sensor blade tip timing
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Investigation of the steam-cooled blade in a steam turbine cascade 被引量:6
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作者 Dieter Bohn Jing Ren Karsten Kusterer 《航空动力学报》 EI CAS CSCD 北大核心 2007年第5期673-682,共10页
With the increasing demand for electricity,an efficiency improvement and thereby reduced CO2 emissions of the coal-fired plants are expected in order to reach the goals set in the Kyoto protocol.It can be achieved by ... With the increasing demand for electricity,an efficiency improvement and thereby reduced CO2 emissions of the coal-fired plants are expected in order to reach the goals set in the Kyoto protocol.It can be achieved by a rise of the process parameters.Currently,live steam pressures and temperatures up to 300 bars and 923 K are planned as the next step.Closed circuit steam cooling of blades and vanes in modern steam turbines is a promising technology in order to establish elevated live steam temperatures in future steam turbine cycles.In this paper,a steam-cooled test vane in a cascade with external hot steam flow is analyzed numerically with the in-house code CHTflow.A parametric analysis aiming to improve the cooling effectiveness is carried out by varying the cooling mass flow ratio.The results from two investigated cases show that the steam cooling technique has a good application potential in the steam turbine.The internal part of the vane is cooled homogeneously in both cases.With the increased cooling mass flow rate,there is a significant improvement of cooling efficiency at the leading edge.The results show that the increased cooling mass flow ratio can enhance the cooling effectiveness at the leading edge.With respect to trailing edge,there is no observable improvement of cooling effectiveness with the increased cooling mass flow.This implies that due to the limited dimension at the trailing edge,the thermal stress cannot be decreased by increasing the cooling mass flow rate.Therefore,impingement-cooling configuration at the trailing edge might be a solution to overcome the critical thermal stress there.It is also observed that the performance of the cooling effective differs on pressure side and suction side.It implicates that the equilibrium of the cooling effectiveness on two sides are influenced by a coupled relationship between cooling mass flow ratio and hole geometry.In future work,optimizing the hole geometry and cooling steam supply conditions might be the solutions for an equivalent cooling effectiveness along whole profile. 展开更多
关键词 蒸汽轮机 层叠 蒸汽冷却 调查研究 热转移
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Energy Analysis of a Combined Solid Oxide Fuel Cell with a Steam Turbine Power Plant for Marine Applications 被引量:1
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作者 Yousri M.A.Welaya M.Mosleh Nader R.Ammar 《Journal of Marine Science and Application》 2013年第4期473-483,共11页
Strong restrictions on emissions from marine power plants(particularly SOx,NOx)will probably be adopted in the near future.In this paper,a combined solid oxide fuel cell(SOFC)and steam turbine fuelled by natural gas i... Strong restrictions on emissions from marine power plants(particularly SOx,NOx)will probably be adopted in the near future.In this paper,a combined solid oxide fuel cell(SOFC)and steam turbine fuelled by natural gas is proposed as an attractive option to limit the environmental impact of the marine sector.The analyzed variant of the combined cycle includes a SOFC operated with natural gas fuel and a steam turbine with a single-pressure waste heat boiler.The calculations were performed for two types of tubular and planar SOFCs,each with an output power of 18 MW.This paper includes a detailed energy analysis of the combined system.Mass and energy balances are performed not only for the whole plant but also for each component in order to evaluate the thermal efficiency of the combined cycle.In addition,the effects of using natural gas as a fuel on the fuel cell voltage and performance are investigated.It has been found that a high overall efficiency approaching 60%may be achieved with an optimum configuration using the SOFC system.The hybrid system would also reduce emissions,fuel consumption,and improve the total system efficiency. 展开更多
关键词 MARINE steam turbine natural gas FUEL solid OXIDE FUEL cell hybrid system energy analysis
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Fault Detection and Isolation Based on Neural Networks Case Study: Steam Turbine 被引量:1
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作者 D. Benazzouz S. Benammar S. Adjerid 《Energy and Power Engineering》 2011年第4期513-516,共4页
The real-time fault diagnosis system is very important for steam turbine generator set due serious fault results in a reduced amount of electricity supply in power plant. A novel real-time fault diagnosis system is pr... The real-time fault diagnosis system is very important for steam turbine generator set due serious fault results in a reduced amount of electricity supply in power plant. A novel real-time fault diagnosis system is proposed by using Levenberg-Marquardt algorithm related to tuning parameters of Artificial Neural Network (ANN). The model of novel fault diagnosis system by using ANN are built and analyzed. Cases of the diagnosis are simulated. The results show that the real-time fault diagnosis system is of high accuracy and quick convergence. It is also found that this model is feasible in real-time fault diagnosis. The steam turbine is used as a power generator by SONELGAZ, an Algerian company located at Cap Djinet town in Boumerdes district. We used this turbine as our main target for the purpose of this analysis. After deep investigation, while keeping our focus on the most sensitive parts within the turbine, the weakest and the strongest points of the system were identified. Those are the points mostly adequate for failure simulations and at which the designed system will be better positioned for irregularities detection during the production process. 展开更多
关键词 FAILURE Diagnosis Artificial NEURAL Networks ISOLATION steam turbine
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Catastrophe Model of Steam Flow Excitation Vibration in Steam Turbine Governing Stage 被引量:8
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作者 LI Jianlan GUO Xuhong YU Chen HUANG Shuhong 《中国电机工程学报》 EI CSCD 北大核心 2013年第11期I0006-I0006,8,共1页
汽流激振是影响大型汽轮机组安全运行的主要故障之一。根据突变理论、非线性振动理论以及流体动力学,从机理分析的角度出发,对汽轮机调节级在部分进汽下导致的汽流激振突变性能进行了定量分析。建立了部分进汽情况下调节级气流激振力... 汽流激振是影响大型汽轮机组安全运行的主要故障之一。根据突变理论、非线性振动理论以及流体动力学,从机理分析的角度出发,对汽轮机调节级在部分进汽下导致的汽流激振突变性能进行了定量分析。建立了部分进汽情况下调节级气流激振力模型,以及考虑汽流激振力的调节级非线性动力学模型,通过基于突变理论的推导,得到了调节级汽流激振的尖点突变流形和分岔集,确定了系统汽流激振突变的影响因子,讨论了振幅突变与影响因子的相关性,划分了系统工作的突变区域。最后,利用数值计算方法对汽流激振的幅值响应进行了分析,分析结果验证了基于突变理论的汽流激振突变分析方法的正确性。研究成果为汽轮机汽流激振突变性能的研究提供了一条新的途径。 展开更多
关键词 流激振动 大型汽轮机 突变理论 模型管理 汽流激振 非线性振动理论 蒸汽流量 流体动力学
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Theoretical and Numerical Analysis of the Mechanical Erosion in Steam Turbine Blades. Part I 被引量:1
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作者 F. Rueda Martínez M. Toledo Velázquez +3 位作者 A. A. Rueda Martínez F. Sánchez Silva S. Alcántara Montes O. M. Huerta Chávez 《Energy and Power Engineering》 2011年第3期227-237,共11页
The methodology of calculation of the velocity distribution for the stream frictionless and the drops in the flow line, on the basis of the frictionless, two-dimensional, stationary, transonic and homogenous flow is e... The methodology of calculation of the velocity distribution for the stream frictionless and the drops in the flow line, on the basis of the frictionless, two-dimensional, stationary, transonic and homogenous flow is established. The knowledge of conditions that govern the low pressure section of steam turbines in the last stage to have an approximate movement of the droplets in the blade cascades and the accumulation of droplets on the stator blades, flowing through the steam, is presented. This study is used for developing a code in Fortran about the velocity distribution in the output of stator blades that have flow conditions of wet steam, in order to understand the causes that originate the erosion on the blades of the last stages in the low pressure section of steam turbines. 展开更多
关键词 steam turbine DROP Distribution EROSION Stator-Rotor BLADE TRANSONIC Flow
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Calculation of Thermal Stress and Fatigue Life of 1000 MW Steam Turbine Rotor 被引量:1
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作者 Shuang Bian Wenyao Li 《Energy and Power Engineering》 2013年第4期1484-1489,共6页
The paper calculated the temperature and stress fields of 1000 MW ultra-supercritical steam turbine rotors which start in cold condition using the finite element calculation program (ANSYS). After getting rotor stress... The paper calculated the temperature and stress fields of 1000 MW ultra-supercritical steam turbine rotors which start in cold condition using the finite element calculation program (ANSYS). After getting rotor stress field, the paper use the general slope method to estimate the low cycle fatigue life loss, the rest of the conditions can be calculated in this method. 展开更多
关键词 Component steam turbine Thermal Stress FINITE ELEMENT Method FATIGUE Life
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Correlation Dimension in Fault Diagnosis of 600 MW Steam Turbine Generator 被引量:2
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作者 姚宝恒 杨霞菊 +1 位作者 佟德纯 陈兆能 《Journal of Donghua University(English Edition)》 EI CAS 2005年第1期31-36,共6页
GP algorithm of correlation dimension computation is ameliorated which overcomes the shortage of traditional one. Improved process of GP algorithm takes the influence of temporal correlative pairs of points on correla... GP algorithm of correlation dimension computation is ameliorated which overcomes the shortage of traditional one. Improved process of GP algorithm takes the influence of temporal correlative pairs of points on correlation dimension into account and promotes the computational efficiency prominently. Iterative SVD method is applied to remove the influence of noise on the result of correlation dimension. The faults of steam flow turbulence and oil film disturbance which occur in 600 MW Steam Turbine Generator are analyzed and whose correlation dimensions are computed. More distinct quantitative index than FFT is gained to distinguish two faults and it’s of little importance to apply correlation dimension to study the influence of various factors on steam flow turbulence fault for nonexistence of convergent floor in correlation integral curve, which presents a new way to learn the operational function of large capacity steam turbine generator and carry out comprehensive condition monitoring. 展开更多
关键词 correlation dimension ameliorated algorithm 600 MW steam turbine generator air turbulence oil film disturbance.
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Sensitivity Analysis of Energy Consumption for Cylinder Efficiency of A 1 000 MW Steam Turbine Unit 被引量:5
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作者 YANG Zhiping YANG Yongping WANG Ningling 《中国电机工程学报》 EI CSCD 北大核心 2012年第26期I0001-I0020,139,共20页
以东汽1000MW汽轮机为研究对象,采用汽轮机组定功率变工况计算方法,对汽轮机各汽缸效率在THA、70%THA、50%THA、40%THA滑压工况进行敏度分析,得到相应工况下各汽缸效率变化对汽轮机热耗率和机组发、供电煤耗率的影响规律。分析表... 以东汽1000MW汽轮机为研究对象,采用汽轮机组定功率变工况计算方法,对汽轮机各汽缸效率在THA、70%THA、50%THA、40%THA滑压工况进行敏度分析,得到相应工况下各汽缸效率变化对汽轮机热耗率和机组发、供电煤耗率的影响规律。分析表明,缸效率的能耗敏度随缸效率变化基本呈线性关系;低压缸效率的能耗敏度最大,高压缸效率次之,中压缸效率较小;随机组负荷降低,高压缸效率的能耗敏度增加,中、低压缸效率的能耗敏度变化较小。在THA工况下低压缸效率下降1%,供电煤耗敏度绝对值增加1.246g/(kW·h),相对值升高0.433%;高压缸效率下降1%,供电煤耗敏度的绝对值增加0.44g/(kW.h),相对值升高0.154%;中压缸效率下降1%,供电煤耗敏度的绝对值增加0.352g/(kW.h),相对值升高0.122%。分析结果可对同类型机组进行节能诊断,进而指导机组的优化运行。 展开更多
关键词 敏感性分析 汽轮机组 能耗效率 发电煤耗率 变工况计算 效率分析 人力资源 耗能性能
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Finite Element Analysis of Steam Turbine Diaphragm 被引量:1
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作者 CHEN Jun-ping YANG Guang-hui YANG Bin 《Computer Aided Drafting,Design and Manufacturing》 2014年第4期60-63,共4页
Thediaphragmofsteam turbine isoneofthemainpartsofthepassageunitfor air flowing.For studying its working conditionand performance, the three-dimensionalfinite element model(FEM)with thesoftware ANSYS10.0 isestablishe... Thediaphragmofsteam turbine isoneofthemainpartsofthepassageunitfor air flowing.For studying its working conditionand performance, the three-dimensionalfinite element model(FEM)with thesoftware ANSYS10.0 isestablished according to theactualworking parameters. With the model, the deformation resultsand stress field resultsare analyzed andthe maximum displacement and stress value are calculated, meanwhile,theircorrespondingpositions are found. It provides a good foundationfor solving the problem inproduction. 展开更多
关键词 DIAPHRAGM steam turbine ANSYS finite element model SMITH
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On-line Failure Diagnostics for Steam Turbine Hydraulic Governing System
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作者 于达仁 徐基豫 高京生 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 1995年第1期37-42,共6页
This paper presents an on-line failure diagnostic method for steam turbine hydraulic governing system. This method uses the estimated values of friction on sliding valves to calculuate the corresponding dead band. Und... This paper presents an on-line failure diagnostic method for steam turbine hydraulic governing system. This method uses the estimated values of friction on sliding valves to calculuate the corresponding dead band. Under load rejection, the steam turbine's additional overspeed caused by these dead bands are studied through computer simulation. This on-line detection of dead bands can realize the failure detection of blockage fault of sliding valves. 展开更多
关键词 ss: steam turbine governing system block failure ON-LINE DIAGNOSTICS
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