Nonpneumonic, short-incubation-period Legionellosis (Pontiac fever) in men who cleaned a steam turbine condenser

Science ◽  
1979 ◽  
Vol 205 (4407) ◽  
pp. 690-691 ◽  
Author(s):  
D. Fraser ◽  
D. Deubner ◽  
D. Hill ◽  
D. Gilliam
Keyword(s):  
Steam Turbine ◽  
Incubation Period ◽  
Short Incubation Period ◽  
Turbine Condenser ◽  
Pontiac Fever ◽  
Steam Turbine Condenser

A Comparative Evaluation of Advanced Combined Cycle Alternatives

1991 ◽  
Vol 113 (2) ◽  
pp. 190-197 ◽  
Author(s):  
O. Bolland
Keyword(s):  
Heat Transfer ◽  
Steam Turbine ◽  
Comparative Evaluation ◽  
Exergy Analysis ◽  
Combined Cycle ◽  
Heat Transfer Area ◽  
Turbine Condenser ◽  
Pressure Cycle ◽  
Steam Turbine Condenser ◽  
Exergy Balance

This paper presents a comparison of measures to improve the efficiency of combined gas and steam turbine cycles. A typical modern dual pressure combined cycle has been chosen as a reference. Several alternative arrangements to improve the efficiency are considered. These comprise the dual pressure reheat cycle, the triple pressure cycle, the triple pressure reheat cycle, the dual pressure supercritical reheat cycle, and the triple pressure supercritical reheat cycle. The effect of supplementary firing is also considered for some cases. The different alternatives are compared with respect to efficiency, required heat transfer area, and stack temperature. A full exergy analysis is given to explain the performance differences for the cycle alternatives. The exergy balance shows a detailed breakdown of all system losses for the HRSG, steam turbine, condenser, and piping.

Computer simulation of the reliability of the heat exchange surface of the steam turbine condenser

2022 ◽  
pp. 1748006X2110672
Author(s):  
Krzysztof Bernard Łukaszewski
Keyword(s):  
Heat Exchange ◽  
Steam Turbine ◽  
Cooling Water ◽  
Operating Conditions ◽  
Time Varying ◽  
Turbine Condenser ◽  
Heat Exchange Surface ◽  
Steam Turbine Condenser ◽  
The Relationship ◽  
Exchange Surface

The aim of the article is to demonstrate the relationship between the adaptive regulation of the heat exchange surface to specific operating conditions of a steam turbine condenser and the reliability and availability of this surface in a specific period of time. The article exemplifies the relationship between the settings of the condenser heat exchange surface and the resulting changes in the reliability structures of this surface. The method of creating a mathematical model of reliability estimation, which is characterized by the variability of the reliability structures of the heat exchange surface in relation to specific operating conditions in a specific period of time, was indicated. Then, exemplary simulations of the adaptation of reliability structures of specific pipe systems constituting the condenser’s heat exchange surface to specific processes of operation of this condenser are presented. The simulations refer to the time-varying thermal loads of the condenser, the time-varying mean thickness of the sediments, and changes in the temperature of the cooling water at the point of its intake over time. The adaptation of certain reliability structures consists in the adaptation of specific systems of pipes through which the cooling water flows to the currently existing operating conditions of the condenser in order to maintain the desired reliability of the heat exchange surface for a specified time. This is done by enabling or disabling the flow of cooling water through a given number of pipes in specific systems under given operating conditions. On the basis of computer simulations, the reliability functions, and the availability functions of the subsystem under consideration were estimated.

scholarly journals Mathematical model of a steam turbine condenser

2021 ◽  
Vol 80 (2) ◽  
pp. 41-46
Author(s):  
N. G. Borissova ◽  
◽  
M. D. Shavdinova ◽  
Keyword(s):  
Mathematical Model ◽  
Vapor Pressure ◽  
Steam Turbine ◽  
Flow Rate ◽  
Cooling Water ◽  
Calculation Methods ◽  
Turbine Condenser ◽  
Passport Data ◽  
Steam Turbine Condenser ◽  
The Mathematical Model

The paper analyses the existing calculation methods for steam turbine condenser. The refined methods for calculating the condenser have also been considered. The dependency of the vapor pressure in the condenser on the temperature of the cooling water and the steam flow rate into the condenser have been considered. It can be seen from the obtained dependencies that the calculation of the condenser according to the ARTI and HEI (USA) methods coincides with the passport data. It is recommended to use the ARTI and HEI (USA) techniques for equipment diagnostics, and to use the KTP and USTU-UPI techniques when studying ways to increase the efficiency of the condenser. The mathematical model of the KG2-6200 condenser has been tested at the Almaty СHPP-2.

A Seismic Analysis on Steam Turbine Considering Turbine and Foundation Interaction

2014 ◽  
Author(s):  
Zhiqiang Hu ◽  
Wei Wang ◽  
Puning Jiang ◽  
Qinghua Huang ◽  
Jianhua Wang ◽  
...  
Keyword(s):  
Stress Response ◽  
Steam Turbine ◽  
Seismic Analysis ◽  
Complex Structure ◽  
Time History ◽  
Relative Displacement ◽  
Detailed Model ◽  
Turbine Condenser ◽  
Steam Turbine Condenser ◽  
Analysis Models

This paper presents a seismic analysis on steam turbine within a Nuclear Power Plant. Firstly, considering that steam turbine is a kind of large equipment with complex structure, high precision and tightly connected with other equipments and structure, this paper coupled together the steam turbine, condenser and its spring foundation as a whole structure for analysis, and created detailed finite analysis models for almost each part. Secondly, the detailed model of steam turbine, condenser and spring foundation was analyzed separately to obtain their dynamic properties (inertia, eigenvalues etc.) to verify whether the detailed finite analysis models were correct and proper. Thirdly, with seismic analysis on the whole structure with time-history method, relative displacement time history curves of some places, as well as stress response of LP (low pressure) outer and inner case, was extracted. Finally, the anti-seismic performance of steam turbine, such as rotor gaps using those relative displacement and stress response results, was analyzed and evaluated.

scholarly journals A Comparative Evaluation of Advanced Combined Cycle Alternatives

1990 ◽  
Author(s):  
Olav Bolland
Keyword(s):  
Heat Transfer ◽  
Steam Turbine ◽  
Comparative Evaluation ◽  
Exergy Analysis ◽  
Combined Cycle ◽  
Heat Transfer Area ◽  
Turbine Condenser ◽  
Pressure Cycle ◽  
Steam Turbine Condenser ◽  
Exergy Balance

This paper presents a comparison of measures to improve the efficiency of combined gas and steam turbine cycles. A typical modern dual pressure combined cycle has been chosen as a reference. Several alternative arrangements to improve the efficiency are considered. These comprise the dual pressure reheat cycle, the triple pressure cycle, the triple pressure reheat cycle, the dual pressure supercritical reheat cycle and the triple pressure supercritical reheat cycle. The effect of supplementary firing is also considered for some cases. The different alternatives are compared with respect to efficiency, required heat transfer area and stack temperature. A full exergy analysis is given to explain the performance differences for the cycle alternatives. The exergy balance shows a detailed breakdown of all system losses for the HRSG, steam turbine, condenser and piping.

scholarly journals Investigating the dearating hotwell working regimes of the PT-60-130/13 steam turbine

2021 ◽  
Vol 22 (6) ◽  
pp. 155-163
Author(s):  
A. D. Vodeniktov ◽  
N. D. Chihirova
Keyword(s):  
Dissolved Oxygen ◽  
Steam Turbine ◽  
Oxygen Concentration ◽  
Power Plants ◽  
Electrical Power ◽  
Dissolved Oxygen Concentration ◽  
Thermal Tests ◽  
Thermal Test ◽  
Turbine Condenser ◽  
Steam Turbine Condenser

THE PURPOSE. To consider the problems of the increasing dissolved oxygen concentration in feedwater, especially after the condensate pumps. To estimate the opportunity of the vacuum thermic deaeration intensification inside the PT-60-130/13 LMZ steam turbine condenser to reduce the feedwater system rate of corrosion. Perform a thermal test of the external deaerating hotwell, which provides reducing dissolved oxygen concentration by the hot drains and recirculating feedwater. To evaluate the march of the dissolved oxygen concentration in feedwater after the inclusion of the deaerating hotwell. METHODS. The thermal test of the external deaerating hotwell was chosen for evaluating water deaeration. RESULTS. In this paper, the results of the thermal tests are given. The relation of the dissolved oxygen concentration from heating fluid flow is also presented. CONCLUSION. The use of the external deaerating hotwell allows achieving dissolved oxygen concentration below the norms established by the сode of operation for electrical power plants and grids to ensure the maintenance of an acceptable water-chemical regime of the feedwater. During the tests, the dissolved oxygen concentration decreased by 70% and reached a value of 8 mcg/dm3. The deaerating hotwell of the considered type can be recommended for the operation, especially during start-up modes and modes with the low thermal load on the condenser cooling surface.

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