Analysis of Deposited Salts in the Through-Flow Area of a 210 MW Steam Turbine

The fluid-driven in-pipe robot is developed. Speed control system was model analyzed and the relationship between the load that affect the speed stability and through-flow area was derived, and the speed control system including double closed-loop feedback part was built.

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Combining Diagnosis Methods for the Fouling on Flow Path of Steam Turbine

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.516-517.577 ◽

2012 ◽

Vol 516-517 ◽

pp. 577-584

Author(s):

Tao Yang ◽

Jian Qun Xu ◽

Ling Li ◽

Ke Yi Zhou ◽

Yong Feng Shi

Keyword(s):

Quantitative Analysis ◽

Qualitative Analysis ◽

Steam Turbine ◽

Flow Path ◽

Thermal Parameters ◽

Actual System ◽

Flow Area ◽

Multiple Faults ◽

Specific Location ◽

Diagnosis Model

The fouling on flow path of steam turbine would lead to the changes of thermal parameters and significantly deteriorated efficiency. In this paper, a qualitative analysis of fouling on flow path based on measured parameters was described for the preliminary diagnosis, and the zooming thermoeconomic diagnosis model combined with the equivalent flow area diagnosis model was proposed to diagnose the specific location of fault. Then the flow performance of a 630 MW supercritical unit was analyzed, and the possible fouling stages were also discussed according to the thermoeconomic diagnosis and quantitative analysis. The result of diagnosis was consistent with the situation of uncovering cylinder, which indicated that though the actual system was complex, the coupling multiple faults of flow path could be diagnosed by combining the above diagnosis models.

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Investigation of a Steam Turbine with Leaned Blades by Through Flow Analysis and 3D CFD Simulation

Challenges of Power Engineering and Environment ◽

10.1007/978-3-540-76694-0_268 ◽

2007 ◽

pp. 1423-1428

Author(s):

Xiaodong Wang ◽

Shun Kang ◽

Ke Yang

Keyword(s):

Steam Turbine ◽

Cfd Simulation ◽

Flow Analysis ◽

Through Flow

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Flow Analysis in a Steam Turbine Control Valve with Through-Flow Valve Chamber

Journal of Nuclear Engineering and Radiation Science ◽

10.1115/1.4049055 ◽

2020 ◽

Author(s):

Vaclav Slama ◽

Lukas Mrozek ◽

Ladislav Tajc ◽

Marek Klimko ◽

Pavel Zitek

Keyword(s):

Steam Turbine ◽

Nuclear Power ◽

Mechanical Energy ◽

Flow Analysis ◽

Control Valve ◽

Operating Characteristics ◽

Safe Operation ◽

Through Flow ◽

Main Components ◽

Flow Valve

Abstract The nuclear power plant also includes a secondary cycle, one of the main components of which is a steam turbine. This device processes the thermal and pressure energy of steam and converts it into mechanical energy. The heat from the reactor is conveied to the secondary cycle in the steam generator. Reliable and safe operation of the steam turbine, and thus of the entire block, is ensured by valves. Flow in a pair of control valves is considered, where the steam flows through the valve chamber past the first valve to the second valve. The experimentally determined flow characteristic of both valves is presented. Data of the distribution of pressures in selected places of these valves are presented. For the typical operating characteristics of a turbine, the course of the coefficient of total pressure distribution losses on the surface of the valves is evaluated. The pressure at the bottom of the cone is compared with the pressure on the wall of the diffuser throat. The energy loss in the valves is compared with the loss in a separate diffuser with varying degrees of expansion. There is also distinguished whether the flow is separated out of the diffuser walls or not.

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Analytical Model of Copper Deposition Patterns on Large Fossil Steam Turbines for Use in Steam Path Design

2003 International Joint Power Generation Conference ◽

10.1115/ijpgc2003-40092 ◽

2003 ◽

Author(s):

Bruce W. Brisson ◽

John D. Alaksiewicz

Keyword(s):

Steam Turbine ◽

Analytical Model ◽

Copper Deposition ◽

Steam Turbines ◽

Flow Area ◽

Profile Losses ◽

Restoration Techniques ◽

Thermodynamic Conditions ◽

Using Data ◽

Turbine Design

Numerous fossil steam turbine utilities are experiencing performance degradation due to copper deposition. Current restoration techniques involve periodic foam cleaning or blast cleaning of the steam path (depending on degradation rate), both of which can be costly in terms of unit down time. Using data from units experiencing similar problems, the deposition distribution pattern in the steam path can be determined. Steam turbine design analysis tools are applied to create an analytical model. Changes in bucket/nozzle surface finish, profile losses and reductions in flow area are included inputs. A direct comparison of output loss between older impulse-type and advanced, modern steam paths can then be made from the analytical model developed. Some conclusions as to the deposition conditions can be inferred from comparing the thermodynamic conditions to the deposition pattern.

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New Flow Stabilizers as a Method to Improve the Reliability and Efficiency of Power Equipment

Modern Applied Science ◽

10.5539/mas.v10n2p172 ◽

2016 ◽

Vol 10 (2) ◽

pp. 172 ◽

Cited By ~ 1

Author(s):

Arkadiy Zaryankin ◽

Nikolay Rogalev ◽

Andrey Rogalev ◽

Anna Kocherova ◽

Galina Kurdiukova

Keyword(s):

Steam Turbine ◽

Hydraulic Resistance ◽

Supply System ◽

Strength Characteristics ◽

Dynamic Loads ◽

Power Equipment ◽

Design Features ◽

Flow Area ◽

Evaluation Data ◽

Comparable Level

<p>This article studies the nature and causes of the dynamic loads exerted by the flow on the walls of the equipment, on an example of a curved component of the steam turbine steam supply system and examines the existing flow stabilizers used to control such loads. Based on the analysis of the shortcomings found in these devices, the article offers new designs of flow stabilizers. The newly developed devices reduce the flow area of the pipeline approximately twice less than the existing ones, so, they were supposed to have much lower hydraulic resistance. The study of the new the flow stabilizers’ efficiency was performed with the use of CFD methods and assessed in comparison with their wide used analogues. Based on the evaluation data, the designed devices provide a comparable level of decrease in dynamic loads, however, they have about five times lower hydraulic resistance. According to their design features, they are also supposed to have better mechanic strength characteristics.</p>

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