Modernization of heat exchangers in steam turbine units taking features of their operation at specific thermal power plants into account

2010 ◽  
Vol 44 (3) ◽  
pp. 208-212 ◽  
Author(s):  
A. Yu. Ryabchikov ◽  
K. É. Aronson ◽  
Yu. M. Brodov ◽  
S. I. Khaet ◽  
S. N. Blinkov ◽  
...  
Keyword(s):  
Steam Turbine ◽  
Heat Exchangers ◽  
Power Plants ◽  
Thermal Power ◽  
Thermal Power Plants

Repowering: An Option for Refurbishment of Old Thermal Power Plants in Latin-American Countries

2010 ◽  
Author(s):  
Washington Orlando Irrazabal Bohorquez ◽  
Joa˜o Roberto Barbosa ◽  
Luiz Augusto Horta Nogueira ◽  
Electo E. Silva Lora
Keyword(s):  
Power Plant ◽  
Natural Gas ◽  
Steam Turbine ◽  
Gas Turbine ◽  
Power Plants ◽  
Thermal Power ◽  
Rankine Cycle ◽  
Combined Cycle ◽  
Fuel Oil ◽  
Thermal Power Plants

The operational rules for the electricity markets in Latin America are changing at the same time that the electricity power plants are being subjected to stronger environmental restrictions, fierce competition and free market rules. This is forcing the conventional power plants owners to evaluate the operation of their power plants. Those thermal power plants were built between the 1960’s and the 1990’s. They are old and inefficient, therefore generating expensive electricity and polluting the environment. This study presents the repowering of thermal power plants based on the analysis of three basic concepts: the thermal configuration of the different technological solutions, the costs of the generated electricity and the environmental impact produced by the decrease of the pollutants generated during the electricity production. The case study for the present paper is an Ecuadorian 73 MWe power output steam power plant erected at the end of the 1970’s and has been operating continuously for over 30 years. Six repowering options are studied, focusing the increase of the installed capacity and thermal efficiency on the baseline case. Numerical simulations the seven thermal power plants are evaluated as follows: A. Modified Rankine cycle (73 MWe) with superheating and regeneration, one conventional boiler burning fuel oil and one old steam turbine. B. Fully-fired combined cycle (240 MWe) with two gas turbines burning natural gas, one recuperative boiler and one old steam turbine. C. Fully-fired combined cycle (235 MWe) with one gas turbine burning natural gas, one recuperative boiler and one old steam turbine. D. Fully-fired combined cycle (242 MWe) with one gas turbine burning natural gas, one recuperative boiler and one old steam turbine. The gas turbine has water injection in the combustion chamber. E. Fully-fired combined cycle (242 MWe) with one gas turbine burning natural gas, one recuperative boiler with supplementary burners and one old steam turbine. The gas turbine has steam injection in the combustion chamber. F. Hybrid combined cycle (235 MWe) with one gas turbine burning natural gas, one recuperative boiler with supplementary burners, one old steam boiler burning natural gas and one old steam turbine. G. Hybrid combined cycle (235 MWe) with one gas turbine burning diesel fuel, one recuperative boiler with supplementary burners, one old steam boiler burning fuel oil and one old steam turbine. All the repowering models show higher efficiency when compared with the Rankine cycle [2, 5]. The thermal cycle efficiency is improved from 28% to 50%. The generated electricity costs are reduced to about 50% when the old power plant is converted to a combined cycle one. When a Rankine cycle power plant burning fuel oil is modified to combined cycle burning natural gas, the CO2 specific emissions by kWh are reduced by about 40%. It is concluded that upgrading older thermal power plants is often a cost-effective method for increasing the power output, improving efficiency and reducing emissions [2, 7].

scholarly journals Automation balance calculations system of recovery feed water at work energy units of thermal power plants.

2015 ◽  
Vol 2015 (3) ◽  
pp. 40-51
Author(s):  
Леонид Пугач ◽  
Leonid Pugach ◽  
Павел Куницын ◽  
Pavel Kunitsyn ◽  
Александр Стребков ◽  
...  
Keyword(s):  
Mass Balance ◽  
Steam Turbine ◽  
Heat Balance ◽  
Matrix Method ◽  
Power Plants ◽  
Thermal Power ◽  
Feed Water ◽  
Thermal Power Plants ◽  
The Matrix ◽  
Solving Equations

The problems of optimizing and automating the process of calculating the thermal schemes steam-turbine plants. The possibility of using different means of software Mathcad for calculation of the energy and mass balance of energy units. Investigated the matrix method for solving equations of heat balance diagrams of steam-turbine plants.

Influence of Aging on Creep Rupture Properties of Heat Resistant Steels for Steam Turbine Rotors of Thermal Power Plants

2011 ◽  
Vol 291-294 ◽  
pp. 1122-1125 ◽  
Author(s):  
Li Bin Niu ◽  
Ippei Matsushima ◽  
Tetsuji Akiu
Keyword(s):  
Steam Turbine ◽  
Power Plants ◽  
Thermal Power ◽  
Creep Rupture ◽  
Thermal Power Plants ◽  
Microstructural Stability ◽  
Heat Resistant ◽  
Turbine Rotors ◽  
Heat Resistant Steels ◽  
Rupture Properties

Influences of aging on the creep rupture properties of super-clean 9%CrMoV steel and 1%CrMoV steel, the heat resistant steels for steam turbine rotors of thermal power plants, are investigated. Using the as-received and the aging-treated materials of the two steels, creep rupture tests are carried out at 566°C. Creep rupture lives, creep fracture modes as well as the microstructural changes of the specimens are examined. It is made clear that the creep strength and the microstructural stability of super-clean 9%CrMoV steel are superior to those of 1%CrMoV steel in long-term services.

Estimation of lifespan and economy parameters of steam-turbine power units in thermal power plants using varying regimes

2016 ◽  
Vol 63 (8) ◽  
pp. 551-557 ◽  
Author(s):  
R. Z. Aminov ◽  
A. F. Shkret ◽  
M. V. Garievskii
Keyword(s):  
Steam Turbine ◽  
Power Plants ◽  
Thermal Power ◽  
Thermal Power Plants

scholarly journals Ocean thermal power plants heat exchangers. Final report

1976 ◽  
Author(s):  
A. M. Czikk ◽  
C. F. Fails ◽  
G. W. Fenner ◽  
D. L. McLaughlin ◽  
R. Zawierucha
Keyword(s):  
Heat Exchangers ◽  
Power Plants ◽  
Thermal Power ◽  
Final Report ◽  
Thermal Power Plants
Sign in / Sign up

Export Citation Format

Share Document