Thermodynamic analysis of a novel dual expansion coal-fueled direct-fired supercritical carbon dioxide power cycle

Zhao, Yongming; Zhao, Lifeng; Wang, Bo; Zhang, Shijie; Chi, Jinling; Xiao, Yunhan

doi:10.1016/j.apenergy.2018.02.088

Cited by 39 publications

(3 citation statements)

References 31 publications

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“…Thus, the transition to oxy-fuel combustion power cycles is reasonable from the points of view of efficient power production and environmental safety. Papers [17,18] propose the Allam cycle with coal gasification where the syngas sensible heat is used for power production in an additional carbon dioxide backpressure turbine, and the turbine exhaust gas is supplied to a multi-flow regenerator. This technical solution allows the cycle net efficiency of 43.7% at the carbon dioxide turbine inlet temperature 1200 • C.…”

Section: Introductionmentioning

confidence: 99%

Archives of Thermodynamics

Kindra,

Rogalev,

Zlyvko

et al. 2021

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Recent climate changes stimulate the search and introduction of solutions for the reduction of the anthropogenic effect upon the environment. Transition to the oxy-fuel combustion power cycles is an advanced method of CO2 emission reduction. In these energy units, the main fuel is natural gas but the cycles may also work on syngas produced by the solid fuel gasification process. This paper discloses a new highly efficient oxy-fuel combustion power cycle with coal gasification, which utilizes the syngas heat in two additional nitrogen gas turbine units. The cycle mathematics simulation and optimization result with the energy unit net efficiency of 40.43%. Parametric studies of the cycle show influence of the parameters upon the energy unit net efficiency. Change of the cycle fuel from natural gas to coal is followed by a nearly twice increase of the carbon dioxide emission from 4.63 to 9.92 gmCO2/kWh.

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Section: Introductionmentioning

confidence: 99%

Archives of Thermodynamics

Kindra,

Rogalev,

Zlyvko

et al. 2021

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“…The Allam cycle thermodynamic analysis is disclosed in numerous papers [11][12][13][14][15] but a lot of problems concerned with its parametric optimization are still not clear. Many papers consider the multi-flow regenerator as a single heat exchanger which overestimates the cycle thermodynamic efficiency.…”

Section: Introductionmentioning

confidence: 99%

Archives of Thermodynamics

Kindra,

Rogalev,

Zlyvko

et al. 2020

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One of the problems in Russia Power Sector strategy until 2035 is the technologies development for mitigation of harmful emissions by the heat and power production industry. This goal may be reached by the transition to environmentally friendly generation units such as oxy-fuel combustion power cycles that burn organic fuels in pure oxygen. This paper provides the results of research on one of the most efficient oxy-fuel combustion power cycle, which was modified by the usage of nitrogen for turbine cooling. The computer simulation and parametric optimization approaches are described in detail. The net efficiency of the oxy-fuel combustion power cycle in relationship to the carbon dioxide turbine exhaust pressure is shown. Moreover, the influence of the regenerator scheme and modeling parameters on heat performance is obtained. Particularly, it was found that the transition to a scheme with five two-threaded heat exchangers decrease cycle efficiency by 4.2% compare to a scheme with a multi-stream regenerator.

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“…Numerous works are devoted to optimization of the SCOC-CC cycle parameters [11][12] and the Allam cycle [13][14]. On the other side, the E-MATIANT structural and parametric optimization aspect did not attract proper attention.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Bleed Flow Precooling Influence on the Efficiency of the E-MATIANT Cycle

Rogalev

Kindra

Zonov

et al. 2018

Mechanics and Mechanical Engineering

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This study aims to present a method for precooling bleed flow by water injection in the E-MATIANT cycle and to estimate its impact on the overall efficiency. The design parameters of the cycle are set up on the basis of the component technologies of today's state-of-the-art gas turbines with a turbine inlet temperature between 1100 and 1700°C. Several schemes of the E-MATIANT cycle are considered: with one, two and three combustion chambers. The optimal pressure ratio ranges for the considered turbine inlet temperatures are identified and a comparison with existing evaluations is made. For the optimal initial parameters, cycle net efficiency varies from 42.0 to 49.8%. A significant influence of turbine stage cooling model on optimal thermodynamic parameters and cycle efficiency is established. The maximum cycle efficiency is 44.0% considering cooling losses. The performance penalty due to the oxygen production and carbon dioxide capture is 20–22%.

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Thermodynamic analysis of a novel dual expansion coal-fueled direct-fired supercritical carbon dioxide power cycle

Cited by 39 publications

References 31 publications

Archives of Thermodynamics

Archives of Thermodynamics

Archives of Thermodynamics

Evaluation of Bleed Flow Precooling Influence on the Efficiency of the E-MATIANT Cycle

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