Thermodynamic analysis of combined cycle under design/off-design conditions for its efficient design and operation

Zhang, Guoqiang; Zheng, Jiongzhi; Xie, Angjun; Yang, Yongping; Liu, Wenyi

doi:10.1016/j.enconman.2016.07.066

Cited by 37 publications

(9 citation statements)

References 29 publications

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“…The model developed for CCGT units displays the architecture shown in Figure with parameters fixed as LHV=48 685 kJ kg −1 and T a =30 °C. The equations are validated using the parameters found in the literature for the PG9351FA unit . Acceptable values for the error of the output variables were achieved (Table ).…”

Section: Resultsmentioning

confidence: 94%

A Generic Method to Model CO₂ Emission Performances of Combined‐Cycle Power Plants for Environmental Unit Commitment

2017

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This paper proposes a generic methodology for combined‐cycle gas turbine modeling. The main objectives are the estimation of the CO2 emissions for specific units and their integration in an environmental power dispatch that considers several plants. First, a design procedure aims at calibrating the model using the information available from the manufactures. Off‐design points are also investigated to estimate the CO2 emissions for the whole operating range of the units. The obtained CO2‐cost results show a good consistency with the emission coefficients found in the literature for that type of units. Then, those CO2 costs are used as input parameters for a unit commitment problem. Mixed‐integer linear programming formulation minimizes the global emissions for a set of different units on Jurong Island in Singapore. The grid‐emission factor obtained for the simulated network displays values close to the registered field data, which validates the developed model. Finally, a tightened formulation for the power‐dispatch problem is introduced. The objective is to reduce the computational time while guaranteeing good performance of the returned solutions.

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Section: Resultsmentioning

confidence: 94%

A Generic Method to Model CO₂ Emission Performances of Combined‐Cycle Power Plants for Environmental Unit Commitment

2017

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“…The bottom cycle parameters affecting the thermodynamic performance of the combined cycle are mainly HP, IP and LP steam pressure values. According to the relevant data of the triple pressure reheat HRSG [31,32], the pressure variation ranges of HP, IP and LP steam are 95.00~185.25 bar, 20.00~38.75 bar and 2.00~4.50 bar, respectively.…”

Section: Optimization Of High Intermediate and Low Steam Pressuresmentioning

confidence: 99%

Thermoeconomic Optimization of Steam Pressure of Heat Recovery Steam Generator in Combined Cycle Gas Turbine under Different Operation Strategies

Wang

Duan

2021

Energies

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The optimization of the steam parameters of the heat recovery steam generators (HRSG) of Combined Cycle Gas Turbines (CCGT) has become one of the important means to reduce the power generation cost of combined cycle units. Based on the structural theory of thermoeconomics, a thermoeconomic optimization model for a triple pressure reheat HRSG is established. Taking the minimization of the power generation cost of the combined cycle system as the optimization objective, an optimization algorithm based on three factors and six levels of orthogonal experimental samples to determine the optimal solution for the high, intermediate and low pressure steam pressures under different gas turbine (GT) operation strategies. The variation law and influencing factors of the system power generation cost with the steam pressure level under all operation strategies are analyzed. The research results show that the system power generation cost decreases as the GT load rate increases, T4 plays a dominant role in the selection of the optimal pressure level for high pressure (HP) steam and, in order to obtain the optimum power generation cost, the IGV T3-650-F mode should be adopted to keep the T4 at a high level under different GT load rates.

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“…A gas turbine is an impeller rotating machine that converts the chemical energy of gas fuel or liquid fuel into useful work with internal combustion and has been extensively applied in the gas and oil pipeline transportation, ship industry, aviation industry, and industrial power station because of its excellent performance 1,2 . As a high‐end product in the energy conversion equipment manufacturing industry, heavy‐duty gas turbine engine has been extensively applied in gas‐steam combined cycle power plants 3,4 . In gas turbine operation, due to harsh working conditions, all kinds of performance degradations or faults of gas‐path components, for example, fouling, corrosion, and so forth, will be caused as the operating time increases 5 .…”

Section: Introductionmentioning

confidence: 99%

Gas turbine gas‐path fault diagnosis in power plant under transient operating condition with variable geometry compressor

Ying

Wang

2022

Energy Science & Engineering

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To extend useful life, improve availability, and reduce gas turbine maintenance costs, scholars have proposed many gas‐path fault diagnostic approaches on the basis of steady‐state operating conditions. However, gas turbines increasingly have to operate more flexibly in grid‐supported modes. In transient operating mode, the service life of the gas turbine will be consumed faster compared with that in base‐load operating mode. In addition, the use of a variable geometry compressor has introduced new uncertainty in the actual diagnostic process, making the applicable boundaries of the original gas‐path diagnosis methods narrower and narrower. Regarding the issue above, a novel approach is proposed for fault diagnosis of gas turbine gas‐path components in power plants under a transient operating condition with the variable geometry compressor for the first time. First, the mathematical relationship of the influence of the compressor inlet guide vane position on the compressor flow and efficiency characteristics is deduced. And a high‐precision thermodynamic model for the purpose of performance analysis and gas‐path fault diagnosis is established, which comprehensively considers the above interference factors and includes health parameters of the main gas‐path components. Second, the thermodynamic model‐based diagnosis strategy under transient operating conditions with the variable geometry compressor is proposed and component health parameters can be quantitatively obtained. At last, the effectiveness and reliability of the method proposed are validated through both simulation test and actual operation test with good accuracy and real‐time performance to diagnose single and multiple component performance degradations, and component abrupt fault.

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Thermodynamic analysis of combined cycle under design/off-design conditions for its efficient design and operation

Cited by 37 publications

References 29 publications

A Generic Method to Model CO₂ Emission Performances of Combined‐Cycle Power Plants for Environmental Unit Commitment

A Generic Method to Model CO₂ Emission Performances of Combined‐Cycle Power Plants for Environmental Unit Commitment

Thermoeconomic Optimization of Steam Pressure of Heat Recovery Steam Generator in Combined Cycle Gas Turbine under Different Operation Strategies

Gas turbine gas‐path fault diagnosis in power plant under transient operating condition with variable geometry compressor

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Thermodynamic analysis of combined cycle under design/off-design conditions for its efficient design and operation

Cited by 37 publications

References 29 publications

A Generic Method to Model CO2 Emission Performances of Combined‐Cycle Power Plants for Environmental Unit Commitment

A Generic Method to Model CO2 Emission Performances of Combined‐Cycle Power Plants for Environmental Unit Commitment

Thermoeconomic Optimization of Steam Pressure of Heat Recovery Steam Generator in Combined Cycle Gas Turbine under Different Operation Strategies

Gas turbine gas‐path fault diagnosis in power plant under transient operating condition with variable geometry compressor

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A Generic Method to Model CO₂ Emission Performances of Combined‐Cycle Power Plants for Environmental Unit Commitment

A Generic Method to Model CO₂ Emission Performances of Combined‐Cycle Power Plants for Environmental Unit Commitment