Thermodynamic Performance Optimization Of 150 MW Combined Cycle Power Plant

To reach the increasingly stringent environmental protection requirements and to optimize the energy structure,comprehensive consideration of energy,economic and environmental factors,Combined Cycle Power Plant(CCPP)has attracted much attention due to its higher power generation efficiency,low pollutant and greenhouse gas emissions.Taking 150 MW CCPP unit as the research object,the thermodynamic analysis method was used to analyze the thermal performance of the generator.Firstly,the selection and layout of the unit were analyzed.The efficiency analysis of Han steel 150 MW CCPP unit was compared with Qian steel in different atmospheric temperature conditions.The results showed that the one for one arrangement of CCPP unit,which steam turbine and gas turbine coaxial arrangement efficiency was superior to the two shaft arrangement.Secondly,the atmospheric temperature,unit load and atmospheric humidity were analyzed.The results show that under the operation condition of the unit should take the overall performance optimization into consideration.Finally,the variable conditions of the Han steel 150 MW CCPP unit was analyzed in the way of thermodynamic energy loss.Calculation results showed that the environmental temperature was 12℃、29℃、32℃、33℃.When the temperature was 29℃,the thermal efficiency of the combined cycle unit reached a maximum of 44.2%.Energy loss analysis results show that the combustion chamber in different operating conditions and the waste heat boiler are the main parts for energy loss.The research shows that the parameter optimization of steam water system is the direction of thermodynamic optimization for CCPP unit when the parameters of gas turbine were determined.The research results have certain practical significance,and it can provide the theoretical basis for CCPP unit selection and energy saving optimization.