Performance Modeling of Unfired Steam Cycle Using Single and Dual Pressure Once-Through Steam Generator

2011 ◽  
Author(s):  
Emad Hamid ◽  
Mike Newby ◽  
Pericles Pilidis
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Low Cost ◽  
Combined Cycle ◽  
Operating Conditions ◽  
Low Carbon ◽  
Performance Simulation ◽  
Actual Performance ◽  
Combined Cycle Power Plant ◽  
Steam Cycle

The high thermal efficiency and the use of low carbon content fuel (e.g., natural gas) have made the Combined Cycle Power Plant (CCPP) one of the best choices for power generation due to its benefits associate with low cost and low environmental impact. The performance of Unfired Steam Cycle (USC) as a part of the CCPP has significant impact on the performance of the whole power plant as it provides the CCPP with around one third of the total useful power. An accurate performance simulation of the USC is therefore necessary to analyze the effects of various operating parameters on the performance of combined cycle power plant. In this paper, a performance simulation approach for an unfired steam cycle using single and dual pressure-level of an OTSG is presented. The developed modeling method has been applied to the performance simulation of an existing unfired steam cycle power generation unit installed at Manx Electricity Authority and the results are promising. A comparison between simulated and actual performance at design and off design operating conditions of the same USC has shown a remarkable agreement with errors values below 1%.

Steam Turbine Driving Compressor for Gas-Steam Combined Cycle Power Plant

2009 ◽  
Author(s):  
Wancai Liu ◽  
Hui Zhang
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Steam Turbine ◽  
Gas Turbine ◽  
Combined Cycle ◽  
Thermodynamic Process ◽  
Combined Cycle Power Plant ◽  
Steam Cycle

Gas turbine is widely applied in power-generation field, especially combined gas-steam cycle. In this paper, the new scheme of steam turbine driving compressor is investigated aiming at the gas-steam combined cycle power plant. Under calculating the thermodynamic process, the new scheme is compared with the scheme of conventional gas-steam combined cycle, pointing its main merits and shortcomings. At the same time, two improved schemes of steam turbine driving compressor are discussed.

Modeling and Performance Analysis of Combined-Cycle Based Ship Power Plant

2010 ◽  
Vol 44-47 ◽  
pp. 1240-1245 ◽  
Author(s):  
Hong Zeng ◽  
Xiao Ling Zhao ◽  
Jun Dong Zhang
Keyword(s):  
Diesel Engine ◽  
Power Plant ◽  
Performance Analysis ◽  
Combined Cycle ◽  
Operating Conditions ◽  
Fuel Oil ◽  
Plant Performance ◽  
Oil Consumption ◽  
Combined Cycle Power Plant ◽  
Simulation Performance

For combined-cycle power plant performance analysis, a ship power plant mathematical model is developed, including diesel engine, controllable pitch propeller, exhaust gas boiler, turbine generator and shaft generator models. The simulation performance characteristic curves of diesel engine under various loads are given. Comparison of simulation results and experimental data shows the model can well predict the performance of diesel engine in various operating conditions. The specific fuel oil consumption contours of combined-cycle power plant and the relations between engine operating conditions and steam cycle parameters are given. The influence of diesel engine operating conditions to the overall performance of combined-cycle power plant is discussed.

Risk Analysis and Safety Evaluation on Combustion System of Gas-Steam Combined Cycle Power Plant

2014 ◽  
Vol 533 ◽  
pp. 354-359 ◽  
Author(s):  
Zhong Qiang Sun
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Risk Analysis ◽  
Combined Cycle ◽  
Generation Process ◽  
Combustion System ◽  
Toxicity Index ◽  
Combined Cycle Power Plant ◽  
Product Gas ◽  
Gas Poisoning

Under the general policy of the national energy-saving emission reduction and sustainable development, the domestic iron and steel enterprises surge in the by-product gas power generation project. There exist many dangerous and harmful factors in by-product steel gas power generation process and which easily caused casualties and the pollution of the environment. The study on risk analysis and evaluation are still relatively dearth about the by-product gas generating process of domestic steel enterprises. The boiler system on a Combined Cycle Power Plant was analyzed and evaluation by ICI/MOND fire and explosion toxicity index method and the method of fault tree analysis, which combined with the actual situation of steel plant Combined Cycle Power Plant. The results show that the combustion system is more dangerous, and the hazard index levels are reduced to lower level after safety compensatory measures except the unit toxicity index higher. The shielding device or gas alarm failure was the main cause of gas poisoning. According to the analysis some feasible measures was put forward. The study has positive guiding significance for risk management and safety administration decision of the Combined Cycle Power Plant.

The Performance Modelling of a Single and Dual Pressure Unfired Once Through Steam Generator

2011 ◽  
Author(s):  
Emad Hamid ◽  
Mike Newby ◽  
Pericles Pilidis
Keyword(s):  
Power Plant ◽  
Steam Generator ◽  
Combined Cycle ◽  
Performance Modelling ◽  
Adequate Model ◽  
Combined Cycle Power Plant ◽  
Starting Point ◽  
Operation Pressure ◽  
Utility Scale ◽  
Steam Cycle

During the worldwide combined cycle power plant (CCPP) power plant building boom high pressure steam cycle has been the design of choice for the most power plant developers. In combined cycle power plant; there are many key areas that can be focused on for improving the thermal efficiency of the cycle and their performances. One of these areas is the unfired heat recovery steam generator so-called once through steam generator (OTSG). The unfired utility scale OTSG is a critical component in the combined cycle power plant, since it is the connection between the gas turbine (GT) and the steam turbine (ST) power units. In this paper, an adequate model has been developed for performance simulation of the once through steam generator OTSG in CCPP application. This model is well applicable for single and two-level of the steam cycle operation pressure. The developed model was tested against an existing OTSG installed at Manx Electricity Authority, and the obtained results and conclusions from this effort are satisfactory with a neglected error and will be a magnificent starting point for future improvements.

scholarly journals Health-safety and environmental risk assessment of power plants using multi criteria decision making method

2011 ◽  
Vol 17 (4) ◽  
pp. 437-449 ◽  
Author(s):  
Ali Jozi ◽  
Alsadat Pouriyeh
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Power Plants ◽  
Underground Water ◽  
Combined Cycle ◽  
Water Levels ◽  
Combined Cycle Power Plant ◽  
Health Safety ◽  
Expert Choice ◽  
Hierarchy Process

Growing importance of environmental issues at global and regional levels including pollution of water, air etc. as well as the outcomes such as global warming and climate change has led to being considered environmental aspects as effective factors for power generation. Study ahead, aims at examination of risks resulting from activities of Yazd Combined Cycle Power Plant located in Iran. Method applied in the research is analytical hierarchy process. After identification of factors causing risk, the analytical hierarchy structure of the power plant risks were designed and weight of the criteria and sub-criteria were calculated by intensity probability product using Eigenvector Method and EXPERT CHOICE Software as well. Results indicate that in technological, health-safety, biophysical and socio economic sections of the power plant, factors influenced by the power plant activities like fire and explosion, hearing loss, quantity of groundwater, power generation are among the most important factors causing risk in the power plant. The drop in underground water levels is the most important natural consequence influenced on Yazd Combined Cycle Power Plant.

scholarly journals HYDROGEN PRODUCED BY SOLAR ENERGY AND THEIR USE AS CLEAN FUEL FOR POWER GENERATION IN A COMBINED CYCLE POWER PLANT

2016 ◽  
Vol 15 (1) ◽  
pp. 41
Author(s):  
J. C. Restrepo ◽  
O. J. Venturini ◽  
E. E. Silva ◽  
L. A. Cortabarria
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Solar Energy ◽  
Electricity Generation ◽  
Combined Cycle ◽  
Energy Utilization ◽  
Main Process ◽  
Clean Fuel ◽  
Combined Cycle Power Plant ◽  
Production Of Hydrogen

The solar energy is one of the most promising energy sources expected for the future, due at their huge potential and the wide availability around the world. However, nowadays this important source of energy is not being harnessed or even addressed in their full potential. According to the last statements, it is important to develop solar energy conversion systems of high efficiency, as well as spreading its use in other forms besides the traditional systems of electric power generation or heating systems. For this reason, in this paper, it is explored the production of hydrogen through solar energy utilization, and the later electrical energy production by burning the produced hydrogen in a combined cycle power plant. The process was modelled for 3 MWe of electricity generation, and using the organic Rankine cycle. The main process for producing hydrogen from water using solar energy is based on a two steps redox thermochemical cycle, which has a theoretical conversion efficiencies of 54% at 1600 K. It is expected that this paper could contributed to the development of ways to enable a better integration of the solar energy with the current electricity generation technologies, as well as to incentive the use of the hydrogen as a clean fuel.

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