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

Zhen Wang and Liqiang Duan
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Zhen Wang: Key Laboratory of Power Station Energy Transfer Conversion and System, Ministry of Education, National Thermal Power Engineering & Technology Research Center, School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
Liqiang Duan: Key Laboratory of Power Station Energy Transfer Conversion and System, Ministry of Education, National Thermal Power Engineering & Technology Research Center, School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China

Energies, 2021, vol. 14, issue 16, 1-20

Abstract: 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, T 4 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 T 4 at a high level under different GT load rates.

Keywords: Combined Cycle Gas Turbine; different operation strategies; thermoeconomic optimization; steam parameters (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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