The Maisotsenko gas turbine cycle(MGTC),integrated with a combined aftercooling and regenerative saturator,has the potential to challenge traditional wet air turbine cycles.However,its large water consumption limits i...The Maisotsenko gas turbine cycle(MGTC),integrated with a combined aftercooling and regenerative saturator,has the potential to challenge traditional wet air turbine cycles.However,its large water consumption limits its applicability.By integrating an intercooler and Organic Rankine Cycle(ORC) into the MGTC,this study proposes a comprehensive design of IMGT-ORC,which can adjust the water capacity of the saturator,and utilize the sensible heat of cooling water and the latent heat of evaporation in exhaust gas to achieve water and energy saving.Firstly,a sensitivity analysis was conducted to investigate the effects of various parameter variations on thermodynamic and economic indicators under different temperature drop ratios.Subsequently,a multi-objective optimization approach was employed to seek for an optimal balance between economic and environmental benefits.The results showed that either the intercooler or ORC integration can improve the thermal efficiency of the system.In the case of joint setting,the thermal efficiency is relatively increased by 6.89% and the water consumption is relatively reduced by 89.07%.Moreover,although high temperature drop ratio reduces the output of ORC,it enhances the energy efficiency of the top cycle.In terms of cost control,ORC integration may increase the levelized cost of electricity(LCOE) slightly,while the intercooler integration helps offset the increase.Finally,the optimization results show that using the optimal parameter combination can reduce the annual equivalent carbon dioxide emissions by 11 600 tons and the annual water consumption of the power plant by 251 027 tons.展开更多
The widespread adoption of Maisotsenko gas turbine cycle(MGTC)is significantly constrained by the design and manufacturing complexity of the saturator.The proposition of innovative approaches to regulate the water car...The widespread adoption of Maisotsenko gas turbine cycle(MGTC)is significantly constrained by the design and manufacturing complexity of the saturator.The proposition of innovative approaches to regulate the water carrying capacity and operational environment of the saturator,coupled with the performance and economic evaluation of systems under various configurations,can substantially facilitate its commercial implementation.Unlike the conventional two-stage MGTC system that solely comprises aftercooling and regenerative processes,this study proposes a three-stage MGTC system with an intercooling process(IMGTC),which considers the reuse of cooling water and energy recovery.The pricing allocation and energy depreciation characteristics of components are analyzed,and the impact of key variables is considered.Finally,economic optimization of the system is conducted using ISIGHT to identify the optimal parameter combination and results.The results indicate that the saturator price of IMGTC is lower and its exergy efficiency is higher than that of MGTC.The average water capacity of the IMGTC saturator is only 57.4%of that of the MGTC saturator,but the average exergy efficiency of IMGTC is 1.1%higher than that of MGTC.Moreover,external parameters all lead to the levelized cost of electricity(LCOE).Thermo-economic optimization shows that the optimal LCOE of IMGTC is 0.26%lower than that of MGTC.This study confirms the feasibility of IMGTC,as well as its thermodynamic and economic advantages over MGTC.展开更多
So far,Maisotsenko cycle has been applied to many fields such as heating ventilation and air-conditioning,power industry,chemical production,and so on.A lot of researches about classical thermodynamic analyses of Mais...So far,Maisotsenko cycle has been applied to many fields such as heating ventilation and air-conditioning,power industry,chemical production,and so on.A lot of researches about classical thermodynamic analyses of Maisotsenko cycle have been made.A new cycle model of combined Diesel and Maisotsenko cycles considering heat transfer loss(HTL),piston friction loss(PFL)and internal irreversible loss(IIL)was proposed in this paper.By using the finite time thermodynamic(FTT)theory,the power and efficiency performances of the Maisotsenko-Diesel cycle(MDC)were studied.Effects of mass flow rate(MFR)of water injection in the Maisotsenko air saturator(MAS)and the other parameters related to the design of Diesel engine on the optimal cycle performances were analyzed.Furthermore,it was testified that irreversible MDC was superior than conventional irreversible Diesel cycle in both power output and thermal efficiency.The results can expand the application of Maisotsenko cycle(M-cycle)and provide some theoretical guidelines for the practical devices.展开更多
基金financial support from the fund of the State Key Laboratory of Long-Life High Temperature Materials (DEC8300CG202210279EE280285)the Fundamental Research Funds for the Central Universities (501XTCX2023146001)。
文摘The Maisotsenko gas turbine cycle(MGTC),integrated with a combined aftercooling and regenerative saturator,has the potential to challenge traditional wet air turbine cycles.However,its large water consumption limits its applicability.By integrating an intercooler and Organic Rankine Cycle(ORC) into the MGTC,this study proposes a comprehensive design of IMGT-ORC,which can adjust the water capacity of the saturator,and utilize the sensible heat of cooling water and the latent heat of evaporation in exhaust gas to achieve water and energy saving.Firstly,a sensitivity analysis was conducted to investigate the effects of various parameter variations on thermodynamic and economic indicators under different temperature drop ratios.Subsequently,a multi-objective optimization approach was employed to seek for an optimal balance between economic and environmental benefits.The results showed that either the intercooler or ORC integration can improve the thermal efficiency of the system.In the case of joint setting,the thermal efficiency is relatively increased by 6.89% and the water consumption is relatively reduced by 89.07%.Moreover,although high temperature drop ratio reduces the output of ORC,it enhances the energy efficiency of the top cycle.In terms of cost control,ORC integration may increase the levelized cost of electricity(LCOE) slightly,while the intercooler integration helps offset the increase.Finally,the optimization results show that using the optimal parameter combination can reduce the annual equivalent carbon dioxide emissions by 11 600 tons and the annual water consumption of the power plant by 251 027 tons.
基金support from the fund of State Key Laboratory of Long-life High Temperature Materials(DEC8300CG202210279EE280285)the Fundamental Research Funds for the Central Universities(501XTCX2023146001).
文摘The widespread adoption of Maisotsenko gas turbine cycle(MGTC)is significantly constrained by the design and manufacturing complexity of the saturator.The proposition of innovative approaches to regulate the water carrying capacity and operational environment of the saturator,coupled with the performance and economic evaluation of systems under various configurations,can substantially facilitate its commercial implementation.Unlike the conventional two-stage MGTC system that solely comprises aftercooling and regenerative processes,this study proposes a three-stage MGTC system with an intercooling process(IMGTC),which considers the reuse of cooling water and energy recovery.The pricing allocation and energy depreciation characteristics of components are analyzed,and the impact of key variables is considered.Finally,economic optimization of the system is conducted using ISIGHT to identify the optimal parameter combination and results.The results indicate that the saturator price of IMGTC is lower and its exergy efficiency is higher than that of MGTC.The average water capacity of the IMGTC saturator is only 57.4%of that of the MGTC saturator,but the average exergy efficiency of IMGTC is 1.1%higher than that of MGTC.Moreover,external parameters all lead to the levelized cost of electricity(LCOE).Thermo-economic optimization shows that the optimal LCOE of IMGTC is 0.26%lower than that of MGTC.This study confirms the feasibility of IMGTC,as well as its thermodynamic and economic advantages over MGTC.
基金supported by The National Natural Science Foundation of China(Project No.51576207)
文摘So far,Maisotsenko cycle has been applied to many fields such as heating ventilation and air-conditioning,power industry,chemical production,and so on.A lot of researches about classical thermodynamic analyses of Maisotsenko cycle have been made.A new cycle model of combined Diesel and Maisotsenko cycles considering heat transfer loss(HTL),piston friction loss(PFL)and internal irreversible loss(IIL)was proposed in this paper.By using the finite time thermodynamic(FTT)theory,the power and efficiency performances of the Maisotsenko-Diesel cycle(MDC)were studied.Effects of mass flow rate(MFR)of water injection in the Maisotsenko air saturator(MAS)and the other parameters related to the design of Diesel engine on the optimal cycle performances were analyzed.Furthermore,it was testified that irreversible MDC was superior than conventional irreversible Diesel cycle in both power output and thermal efficiency.The results can expand the application of Maisotsenko cycle(M-cycle)and provide some theoretical guidelines for the practical devices.
