scholarly journals Thermodynamic Study of the Overall Performance of an Air-Turbine Steam-Turbine Combined-Cycle Power Plant Based on First-Law as Well as Second-Law Analysis

1991 ◽  
Author(s):  
Francis F. Huang
Keyword(s):  
Power Plant ◽  
Steam Turbine ◽  
Compression Ratio ◽  
Pressure Ratio ◽  
Combined Cycle ◽  
Second Law ◽  
Combined Cycle Power Plant ◽  
Air Turbine ◽  
Second Law Analysis ◽  
Overall Performance

The overall performance of an air-turbine steam-turbine combined-cycle power plant that is similar to a recent invention has been studied based on first-law as well as second-law analysis. It has been shown that the prerequisite for such a power plant to achieve a high overall performance is an air-turbine air-heater system having a high second-law efficiency which is not sensitive to the compressor compression ratio of the air-turbine cycle. For optimum performance, a moderate cycle pressure ratio (say 8 to 14) may be used for TIT of 1700°F (926.7°C).

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.

A Combined Cycle Power Plant With Absorption Cooling for Houses Air Conditioning

2012 ◽  
Author(s):  
Hamad H. Almutairi ◽  
Jonathan Dewsbury ◽  
Gregory F. Lane-Serff
Keyword(s):  
Power Plant ◽  
Steam Turbine ◽  
Air Conditioning ◽  
Computer Models ◽  
Simulation Software ◽  
Combined Cycle ◽  
Cooling Load ◽  
Direct Expansion ◽  
Absorption Chiller ◽  
Combined Cycle Power Plant

This study examined the viability of a single-effect water/lithium bromide absorption chiller driven by steam extracted from the steam turbine in the configuration of a combined cycle power plant (CCPP). System performance was verified based on the annual cooling load profile of 1,000 typical houses in Kuwait obtained from DesignBuilder building simulation software. Computer models that represented a CCPP with an absorption chiller and a CCPP with a Direct-Expansion (DX) air conditioning system were developed using Engineering Equation Solver software. The computer models interacted with the cooling load profiles obtained from DesignBuilder. Analysis shows that the CCPP with the absorption chiller yielded less net electrical power to the utility grid compared to similar CCPPs giving electricity both to the grid and to the Direct-Expansion air conditioning systems given the same cooling requirements. The reason for this finding is the reduction in steam turbine power output resulting from steam extraction.

Medway: A High-Efficiency Combined Cycle Power Plant Design

1995 ◽  
Vol 117 (4) ◽  
pp. 713-723 ◽  
Author(s):  
D. M. Leis ◽  
M. J. Boss ◽  
M. P. Melsert
Keyword(s):  
Power Plant ◽  
Steam Turbine ◽  
High Reliability ◽  
System Optimization ◽  
Combined Cycle ◽  
Advanced Technology ◽  
Plant Design ◽  
Turbine Generator ◽  
Combined Cycle Power Plant ◽  
Plant System

The Medway Project is a 660 MW combined cycle power plant, which employs two of the world’s largest advanced technology MS9001FA combustion turbine generators and an advanced design reheat steam turbine generator in a power plant system designed for high reliability and efficiency. This paper discusses the power plant system optimization and design, including thermodynamic cycle selection, equipment arrangement, and system operation. The design of the MS9001FA combustion turbine generator and the steam turbine generator, including tailoring for the specific application conditions, is discussed.

Impact of Inlet Fogging on the Performance of Steam Injected Cooled Gas Turbine Based Combined Cycle Power Plant

2017 ◽  
Author(s):  
Anoop Kumar Shukla ◽  
Onkar Singh
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Film Cooling ◽  
Pressure Ratio ◽  
Steam Injection ◽  
Combined Cycle ◽  
Specific Power ◽  
Temperature Cycle ◽  
Inlet Temperature ◽  
Combined Cycle Power Plant

Gas/steam combined cycle power plants are extensively used for power generation across the world. Today’s power plant operators are persistently requesting enhancement in performance. As a result, the rigour of thermodynamic design and optimization has grown tremendously. To enhance the gas turbine thermal efficiency and specific power output, the research and development work has centered on improving firing temperature, cycle pressure ratio, adopting improved component design, cooling and combustion technologies, and advanced materials and employing integrated system (e.g. combined cycles, intercooling, recuperation, reheat, chemical recuperation). In this paper a study is conducted for combining three systems namely inlet fogging, steam injection in combustor, and film cooling of gas turbine blade for performance enhancement of gas/steam combined cycle power plant. The evaluation of the integrated effect of inlet fogging, steam injection and film cooling on the gas turbine cycle performance is undertaken here. Study involves thermodynamic modeling of gas/steam combined cycle system based on the first law of thermodynamics. The results obtained based on modeling have been presented and analyzed through graphical depiction of variations in efficiency, specific work output, cycle pressure ratio, inlet air temperature & density variation, turbine inlet temperature, specific fuel consumption etc.

Combined Cycle Off-Design Performance Estimation: A Second-Law Perspective

2011 ◽  
Author(s):  
S. Can Gu¨len ◽  
Joseph John
Keyword(s):  
Power Plant ◽  
Electricity Market ◽  
Combined Cycle ◽  
Performance Estimation ◽  
Second Law ◽  
Combined Cycle Power Plant ◽  
Design Performance ◽  
Cycle System ◽  
Wide Range ◽  
Exact Design

A combined cycle power plant (or any power plant, for that matter) does very rarely — if ever — run at the exact design point ambient and loading conditions. Depending on the demand for electricity, market conditions and other considerations of interest to the owner of the plant and the existing ambient conditions, a CC plant will run under boundary conditions that are significantly different from those for which individual components are designed. Accurate calculation of the “off-design” performance of the overall combined cycle system and its key subsystems requires highly detailed and complicated computer models. Such models are crucial to high-fidelity simulation of myriad off-design performance scenarios for control system development to ensure safe and reliable operability in the field. A viable option in lieu of sophisticated system simulation is making use of the normalized curves that are generated from rigorous model runs and applying the factors read from such curves to a known design performance to calculate the “off-design” performance. This is the common method adopted in the fulfillment of commercial transactions. These curves, however, are highly system-specific and their broad applicability to a wide variety of configurations is limited. Utilizing the key principles of the second law of thermodynamics, this paper describes a simple, physics-based calculation method to estimate the off-design performance of a combined cycle power plant. The method is shown to be quite robust within a wide range of operating regimes for a generic combined cycle system. As such, a second law based approach to off-design performance estimation is a highly viable tool for plant engineers and operators in cases where calculation speed with a small sacrifice in fidelity is of prime importance.

scholarly journals Study on effective parameter of the triple-pressure reheat combined cycle performance

2013 ◽  
Vol 17 (2) ◽  
pp. 497-508 ◽  
Author(s):  
Thamir Ibrahim ◽  
M.M. Rahman
Keyword(s):  
Power Plant ◽  
Ambient Temperature ◽  
Compression Ratio ◽  
Combined Cycle ◽  
Total Power ◽  
Inlet Temperature ◽  
Turbine Inlet Temperature ◽  
Turbine Inlet ◽  
Overall Performance ◽  
Overall Efficiency

The thermodynamic analyses of the triple-pressure reheat combined cycle gas turbines with duct burner are presented and discussed in this paper. The overall performance of a combined cycle gas turbine power plant is influenced by the ambient temperature, compression ratio and turbine inlet temperature. These parameters affect the overall thermal efficiency, power output and the heat-rate. In this study a thermodynamic model was development on an existing actual combined cycle gas turbine (CCGT) (In this case study, an effort has been made to enhance the performance of the CCGT through a parametric study using a thermodynamic analysis. The effect of ambient temperature and operation parameter, including compression ratio and turbine inlet temperature, on the overall performance of CCGT are investigated. The code of the performance model for CCGT power plant was developed utilizing the THERMOFLEX software. The simulating results show that the total power output and overall efficiency of a CCGT decrease with increase the ambient temperature because increase the consumption power in the air compressor of a GT. The totals power of a CCGT decreases with increase the compression rate, while the overall efficiency of a CCGT increases with increase the compression ratio to 21, after that the overall efficiency will go down. Far there more the turbine inlet temperature increases the both total power and overall efficiency increase, so the turbine inlet temperature has a strong effect on the overall performance of CCGT power plant. Also the simulation model give a good result compared with MARAFIQ CCGT power plant. With these variables, the turbine inlet temperature causes the greatest overall performance variation.

Sign in / Sign up

Export Citation Format

Share Document