scholarly journals ANALISIS TERMOEKONOMI SIKLUS KOMBINASI TURBIN GAS DAN UAP UNIT PLTGU GRATI

2021 ◽  
Author(s):  
Putri Sundari
Keyword(s):  
Power Plant ◽  
System Performance ◽  
Fossil Fuels ◽  
Exergy Analysis ◽  
Combined Cycle ◽  
Plant Performance ◽  
Combine Cycle Power Plant ◽  
Exergy Destruction ◽  
Combine Cycle ◽  
Research Analysis

The increasing of electricity needs and the crisis of fossil fuels have been requiring an improvement of power plant performance, including combined cycle power plant which has important role as a provider of national electricity nowadays. Thermoeconomic analysis is one of new concept that combine exergy analysis with cost approachment to improve a system performance. In this research, analysis applied in combine cycle power plant of PT. Indonesia Power Grati. The result shows that combustion chamber is the greatest irreversibility source with an exergy destruction was found 53,81%. Where as an economic analysis obtains a different result, LP steam turbine is the component which has a huge exergoeconomic loss was found Rp 33.655.386,46/hour. Based on this result, the efforts that we can do to get an optimal performance of combine cycle power plant are preheating a combustion air to reach a perfect combustion and cleaning all the components continually.

Comparison of Combined Cycle and Conventional Steam Power Plant Through Energy Level and Thermoeconomic Analysis

2008 ◽  
Author(s):  
Mohammad Hasan Khoshgoftar Manesh ◽  
Majid Amidpour ◽  
Hasan Khodaei Jalal Abadi
Keyword(s):  
Power Plant ◽  
Computer Program ◽  
Exergy Analysis ◽  
Combined Cycle ◽  
Operating Conditions ◽  
Plant Performance ◽  
Exergy Destruction ◽  
Steam Power ◽  
Steam Power Plant ◽  
Exergoeconomic Analysis

Exergy, exergoeconomic and combined pinch and exergy analysis are beneficial methods that can be applied for design or performance evaluation of process systems or thermal power plants; however, these methods are usually applied individually. In this paper, these methods have been applied for 423 MW NEKA combined cycle power plant located in NEKA at north of Iran and 315-MW RAMIN steam power plant located in Ahvaz at south of Iran as real cases to evaluation and comparison of performance of each component in different load conditions simultaneously. To perform these analysis for both plants, a computer program is developed from thermodynamic modeling of the plant as simulator. With the thermodynamic properties of the most significant mass and energy flow stream being obtained from the plant, the simulator can reproduce the cycle behavior for different operating conditions with relative errors less than 4.2%. The models of computer program are refined using data from designed performance test in these plants. After thermodynamic simulation, this program can calculate exergy of the flows. In addition, it can perform exergoeconomic analysis using thermoeconomic model of both plants that are defined based on the functionally of each component by the fuel-product definition. The costs of all flows in production structure can be calculated by solving a set equation including thermoeconomic modeling of each plant. Furthermore, it is helpful to display the system information graphically for one to visualize the performance of system in different conditions by applying combined pinch-exergy analysis. Meanwhile, due to importance of exergy destruction cost and better understanding plant performance, the new variables have been defined as Exergy Destruction Level (EDL) and Exergy Cost Destruction Level (ECDL). In this respect, new graphical representation has been developed for showing performance of each component based on exergoeconomic analysis. In this regard, this computer program can generate improved combined pinch-exergy and EDL/ ECDL representation.

Combined Cycle Powerplant Cost Sensitivity Analysis

2021 ◽  
Author(s):  
Pugalenthi Nanadagopal ◽  
Animesh Pandey ◽  
Manjunath More ◽  
Pertik Kamboj
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Combined Cycle ◽  
Maintenance Cost ◽  
Combine Cycle Power Plant ◽  
Manufacturing Companies ◽  
Levelized Cost Of Electricity ◽  
Combine Cycle ◽  
Electrical Generation ◽  
The Impact

Abstract In Gas turbine-based combined cycle power plant market, the customer conducts an economic evaluation of competitive products to decide their buying option. There are different methods to calculate the economics of a power plant like Levelized cost of electricity (LCOE), Net present value (NPV) and payback period. LCOE methodology is commonly used for lifecycle cost analyses for combine cycle power plant that covers cost details of the plant and plant performance over the complete lifetime of a power plant from construction to retiring. Typically, it includes a combine cycle power plant ownership costs (Total plant cost and operating & maintenance cost) and combine cycle power output and efficiency. This LCOE method is helpful to compare power generation system that use similar technologies. This paper encompasses the LCOE calculation method, assumptions & approach to analyze the impact of key parameters of the electrical generation cost. They key parameters includes combine cycle output, combine cycle efficiency, fuel cost, annual operating hours, capital charge factor, annual operating hours, power plant life, discount rate, nominal escalation rate, operating & maintenance cost. This paper analyses result will provide insights to the customer & Gas turbine-based OEM (Own Equipment Manufacturing) companies to focus on different area/parameters to reduce the unit cost of generating electricity.

scholarly journals Numerical analysis and field study of time dependent exergy-energy of a gas-steam combined cycle

2012 ◽  
Vol 77 (7) ◽  
pp. 945-957
Author(s):  
Bamdad Barari ◽  
Abbasian Shirazi ◽  
Mohsen Keshavarzi ◽  
Iman Rostamsowlat
Keyword(s):  
Power Plant ◽  
Exergy Analysis ◽  
Combined Cycle ◽  
Time Dependent ◽  
Fars Province ◽  
Exergy Destruction ◽  
Time Duration ◽  
Aging Rate ◽  
Lost Work ◽  
Gas Turbine Cycle

In this study, time dependent exergy analysis of the Fars Combined Power Plant Cycle has been investigated. Exergy analysis has been used for investigating each part of actual combined cycle by considering irreversibility from Apr 2006 to Oct 2010. Performance analysis has been done for each part by evaluating exergy destruction in each month. By using of exergy analysis, aging of each part has been evaluated respect to time duration. In addition, the rate of lost work for each month has been calculated and variation of this parameter has been considered as a function of aging rate. Finally, effects of exergy destruction of each part have been investigated on exergy destruction of whole cycle. Entire analysis has been done for Unit 3 and 4 of gas turbine cycle which combined by Unit B of steam cycle in Fars Combined Power Plant Cycle located in Fars province in Iran.

Transient Exergy Analysis of the Dynamic Operation of a Combined Cycle Power Plant

2021 ◽  
Author(s):  
Raphael Wittenburg ◽  
Moritz Hübel ◽  
Dorian Holtz ◽  
Karsten Müller
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Exergy Analysis ◽  
Measurement Data ◽  
Combined Cycle ◽  
Exergy Destruction ◽  
Transient Operation ◽  
State Equations ◽  
Component Level ◽  
Combined Cycle Power Plant

Abstract The increasing share of fluctuating electricity feed-in from wind energy and photovoltaic systems has a significant impact on the operating regime of conventional power plants. Since frequent load changes were not the focus of optimization in the past, there is still potential for improving the transient operating behavior. Exergy analyses are increasingly used to determine optimization potentials in energy conversion processes, but are mostly limited to stationary conditions. In order to perform an exergy analysis of the transient operation of a combined cycle power plant on component level, detailed information on the state and process variables of the individual components is required. These are not completely accessible via measurement data alone. For this reason, a comprehensive dynamic simulation model was developed, which includes the process components and the power plant control system. With the help of the implemented exergetic balance and state equations, the desired exergy quantities can be determined. The simulation results are used to evaluate the transient operating behaviour at different load change gradients and control actions on the basis of exergetic parameters. The exergy analysis results in an improved understanding of the causes of exergy destruction in the system, which can be used for optimization approaches. As expected, the main causes of exergy destruction are combustion processes and increased temperature gradients during transient operation. Overall, however, only moderately increased exergy destruction can be determined for the transient operation of the investigated plant compared to the steady state.

A GCC Power Plant With Methanol Storage for Intermediate-Load Duty

1991 ◽  
Vol 113 (1) ◽  
pp. 151-157 ◽  
Author(s):  
J. A. Paffenbarger
Keyword(s):  
Power Plant ◽  
Coal Gasification ◽  
Combined Cycle ◽  
Production Costs ◽  
Plant Performance ◽  
Electricity Production ◽  
Fuel Prices ◽  
Electrical Demand ◽  
Integrated Facility ◽  
Plant Configuration

This paper describes the design and performance of a coal gasification combined-cycle power plant with an integrated facility for producing and storing methanol (GCC/methanol power plant). The methanol is produced at a steady rate and is burned in the combined cycle to generate additional power during periods of peak electrical demand. The GCC/methanol plant provides electricity generation and energy storage in one coal-based facility. It is of potential interest to electric utilities seeking to meet intermediate-load electrical demand on their systems. The plant configuration is determined by means of an innovative economic screening methodology considering capital and fuel costs over a range of cycling duties (capacity factors). Estimated levelized electricity production costs indicate that a GCC/methanol plant could be of economic interest as premium fuel prices increase relative to coal. The plant could potentially be of interest for meeting daily peak demands for periods of eight hours or less. The conceptual plant configuration employs a Texaco gasifier and a Lurgi methanol synthesis plant. Plant performance is estimated at peak and baseload output levels. No unusual design or operational problems were identified.

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.

Short-Term Optimization of a Combined Cycle Power Plant Integrated With an Inlet Air Conditioning Unit

2020 ◽  
Author(s):  
Weimar Mantilla ◽  
José García ◽  
Rafael Guédez ◽  
Alessandro Sorce
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Air Conditioning ◽  
Combined Cycle ◽  
Plant Performance ◽  
Mixed Integer ◽  
Environmental Load ◽  
Turbine Inlet ◽  
The Impact

Abstract Under new scenarios with high shares of variable renewable electricity, combined cycle gas turbines (CCGT) are required to improve their flexibility, in terms of ramping capabilities and part-load efficiency, to help balance the power system. Simultaneously, liberalization of electricity markets and the complexity of its hourly price dynamics are affecting the CCGT profitability, leading the need for optimizing its operation. Among the different possibilities to enhance the power plant performance, an inlet air conditioning unit (ICU) offers the benefit of power augmentation and “minimum environmental load” (MEL) reduction by controlling the gas turbine inlet temperature using cold thermal energy storage and a heat pump. Consequently, an evaluation of a CCGT integrated with this inlet conditioning unit including a day-ahead optimized operation strategy was developed in this study. To establish the hourly dispatch of the power plant and the operation mode of the inlet conditioning unit to either cool down or heat up the gas turbine inlet air, a mixed-integer linear optimization (MILP) was formulated using MATLAB, aiming to maximize the operational profit of the plant within a 24-hours horizon. To assess the impact of the proposed unit operating under this dispatch strategy, historical data of electricity and natural gas prices, as well as meteorological data and CO2 emission allowances price, have been used to perform annual simulations of a reference power plant located in Turin, Italy. Furthermore, different equipment capacities and parameters have been investigated to identify trends of the power plant performance. Lastly, a sensitivity analysis on market conditions to test the control strategy response was also considered. Results indicate that the inlet conditioning unit, together with the dispatch optimization, increases the power plant’s operational profit by achieving a wider operational range, particularly important during peak and off-peak periods. For the specific case study, it is estimated that the net present value of the CCGT integrated with the ICU is 0.5% higher than the power plant without the unit. In terms of technical performance, results show that the unit reduces the minimum environmental load by approximately 1.34% and can increase the net power output by 0.17% annually.

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