Economic Analysis for Steam-Driven Induced Draft Fans and Application Characteristics of Different Units

2014 ◽  
Vol 889-890 ◽  
pp. 1574-1577
Author(s):  
Qi Sheng Xu ◽  
Gui Cai Liu ◽  
Jie Wu ◽  
Xiao Qian Ma ◽  
Yue Xi Yu ◽  
...  
Keyword(s):  
Economic Analysis ◽  
Economic Benefit ◽  
Power Plants ◽  
Application Characteristics ◽  
Steam Parameters ◽  
Main Steam ◽  
Induced Draft Fan

Concerning the steam-driven induced draft fan renovation tendency in large coal-fired power plants, the economic analysis of steam-driven way is proposed. And based on the 600MW unit of different capacity, the application characteristics are analyzed. As the result, the economic benefit of 600MW subcritical, supercritical and ultra-supercritical units are 6.93×106, 5.14×106 and 3.81×106 RMB, respectively. The lower main steam parameters, the larger economic benefit.

Competitive Bidding by Surrogate Modeling of Steam Parameter Influence on the Attainable Start Numbers of Turbine Casings

2020 ◽  
Author(s):  
Marcel Seiler ◽  
Vitali Züch ◽  
Peter Dumstorff ◽  
Henning Almstedt
Keyword(s):  
Wall Temperature ◽  
Surrogate Model ◽  
Power Plants ◽  
Fe Model ◽  
Steam Turbines ◽  
Require Time ◽  
Steam Parameters ◽  
Fast Prediction ◽  
Main Steam ◽  
Flexible Operation

Abstract The continued expansion of fluctuating energy sources such as wind turbines and solar systems will increase the demand for more flexible operation modes of power plants. Especially steam turbines with all their components will have to sustain a higher amount of start-stop cycles in order to compensate for variations in wind and solar radiation. Besides the rotor, inner casings are an example for main steam turbine components which are strongly loaded by thermal cycles at each start and shut down procedure. A precise prediction of the attainable number of start-stop cycles enables a more flexible operation within the guaranteed lifetime. However, this would require time-consuming FE calculations for each power plant due to their specific steam parameters. In this paper, a physics based surrogate model is discussed for a fast prediction of permissible start-stop cycles at plant specific steam parameters. The correlation between the physical properties from the surrogate model (wall temperature difference and the resulting stresses) and the attainable number of start-stop cycles from the FE model is determined. A validation with a different inner casing design within a usual wall temperature range confirms the high accuracy level of the surrogate model compared to uncertainties like material scatter or casting tolerances. With the provided approach typically a higher number of starts can be efficiently calculated in the bidding phase compared to assuming only one conservative value for each turbine type or size. Furthermore, the steam parameters can be optimized for increasing the number of starts to the required value without additional and time-consuming FE calculations.

Thermo-Economic Optimization of the Dual-Pressure Condenser for 700 °C Ultra-Supercritical Coal-Fired Power Plants

2020 ◽  
Author(s):  
Yue Fu ◽  
Ming Liu ◽  
Liyuan Wang ◽  
Junjie Yan
Keyword(s):  
Heat Transfer ◽  
High Pressure ◽  
Mass Flow ◽  
Power Plants ◽  
Low Pressure ◽  
Heat Transfer Area ◽  
Economic Optimization ◽  
Steam Parameters ◽  
Main Steam ◽  
The Cost

Abstract Pulverized coal power is one of major contributor in power production, whose efficiency can be enhanced by increasing the main steam parameters and adjusting the cold end system parameters. The thermo-economic optimization of the cold end system for 700 °C ultra-supercritical coal-fired power plants were carried out in this study. The condenser pressure was thermo-economically optimized for the single-pressure condenser systems. Then, with the same heat transfer area of the optimized single-pressure condenser, the dual-pressure condenser system was thermo-economically optimized. The distributions of heat transfer area and exhaust steam mass flow between the high-pressure and low-pressure chambers in the dual-pressure condenser system were optimized. The results show that the optimal vacuum pressure of the single-pressure condenser is 3 kPa and the optimal heat transfer area is 27 km2. For the dual-pressure condenser system, the cost of dual-pressure condenser is reduced to the minimum value 1.3 million CNY/year. The power plant efficiency is increased by the maximum value 0.1% when the heat transfer area and exhaust steam mass flow rate are distributed equally between two chambers, compared with that of the single-pressure condenser system. The optimal values of the low-pressure and high-pressure chamber are 2.4 kPa and 3.2 kPa, respectively. This paper provides the reference for the design optimization of cold end system for high parameter power units.

TECHNO-ECONOMIC ANALYSIS AND SIZING OF DISH-STIRLING POWER PLANTS.

2018 ◽  
Author(s):  
Alex Anderson Calbino da Silva ◽  
Osvaldo Jose Venturini
Keyword(s):  
Economic Analysis ◽  
Power Plants

Boiler Implosion Control in Fossil Fuel Power Plants

1985 ◽  
Vol 107 (4) ◽  
pp. 267-269 ◽  
Author(s):  
S. Z. Wu ◽  
D. N. Wormley ◽  
D. Rowell ◽  
P. Griffith
Keyword(s):  
Power Plants ◽  
Fossil Fuel ◽  
Companion Paper ◽  
Simulation Techniques ◽  
Power Plant Boiler ◽  
Induced Draft Fan ◽  
Fossil Fuel Power Plants ◽  
Computer Simulation Techniques ◽  
Plant Boiler ◽  
Furnace Pressure

An evaluation of systems for control of fossil fuel power plant boiler and stack implosions has been performed using computer simulation techniques described in a companion paper. The simulations have shown that forced and induced draft fan control systems and induced draft fan bypass systems reduce the furnace pressure excursions significantly following a main fuel trip. The limitations of these systems are associated with actuator range and response time and stack pressure excursions during control actions. Preliminary study suggests that an alternative control solution may be achieved by discharging steam into the furnace after a fuel trip.

An Experimental Measurement of Toughness Locus for a Ductile Material

2005 ◽  
Vol 297-300 ◽  
pp. 2410-2415 ◽  
Author(s):  
Dong Hak Kim ◽  
Jeong Hyun Lee ◽  
Ho Dong Kim ◽  
Ki Ju Kang
Keyword(s):  
Crack Length ◽  
Nuclear Power ◽  
Power Plants ◽  
Test Procedure ◽  
Stress Triaxiality ◽  
Crack Tip ◽  
Potential Drop ◽  
Image Correlation ◽  
Ductile Material ◽  
Main Steam

A toughness locus Jc-Q for a ductile steel, SA106 Grade C used in the main steam piping of nuclear power plants, has been experimentally evaluated. Along with the standard fracture test procedure for J-R curve, Q as the second parameter governing stress triaxiality nearby the crack tip is measured from the displacements nearby the side necking which occurs near the crack tip on the lateral surface of a fracture specimen. The displacements nearby the side necking are measured from the digital images taken during the fracture experiment based on Stereoscopic Digital Photography (SDP) and high resolution Digital Image Correlation (DIC) software. The crack length is monitored by Direct Current Potential Drop (DCPD) method and the J-R curve is determined according to ASTM standard E1737-96. The effects of crack length, specimen geometry and thickness of specimen are studied, which are included in the toughness locus Jc-Q.

A techno-economic analysis of the roof top off-grid solar PV system for Jamshedpur, Jharkhand, India

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Mantosh Kumar ◽  
Kumari Namrata ◽  
Akshit Samadhiya
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Economic Analysis ◽  
Electricity Generation ◽  
Power Plants ◽  
Optimum Combination ◽  
Solar Array ◽  
Solar Pv ◽  
Pv System ◽  
Solar Pv System

Abstract As the exhaust rate of the conventional sources has geared up already, this is compelling the power industries to install the power plants based on the non-conventional sources so that future demand of the energy supply can be fulfilled. Among the various sources of renewable energy like wind, hydro, tidal etc., solar energy is the most easily accessible and available renewable energy source. Ensuring the feasibility of any energy source not only technical but also the economical perspective is the most important criteria. This paper has incorporated both the perspective and has done the techno-economic analysis to determine the optimum combination of the PV array size and battery size to minimize the overall electricity generation per unit. In this paper, a standalone solar PV system has been analyzed for the location of Jamshedpur, where an effort has been done to choose the optimum combination of the solar array and battery size within the desired range of LLP so that the electricity generation cost per unit can be minimized. The overall duration of the analysis has been done for a year and the outcome of the research has been verified with the help of MATLAB software.

scholarly journals Operating and economic conditions of cooling water control for marine steam turbine condensers

2011 ◽  
Vol 18 (3) ◽  
pp. 48-54 ◽  
Author(s):  
Andrzej Błaszczyk ◽  
Jerzy Głuch ◽  
Andrzej Gardzilewicz
Keyword(s):  
Economic Analysis ◽  
Steam Turbine ◽  
Water Flow ◽  
Power Plants ◽  
Cooling Water ◽  
Economic Conditions ◽  
Water Control ◽  
Water Pumps

Operating and economic conditions of cooling water control for marine steam turbine condensers The article presents the operational and economic analysis of controlling the cooling water flow in marine steam turbine power plants. The analysis bases on selected designs of the main condenser cooling water pumps and makes use of the results of investigations performed in inland power plants. Special attention was focused on marine aspects of the operation of those systems.

Sign in / Sign up

Export Citation Format

Share Document