Comparative Energy and Emission Analysis of Oxy-Combustion and Conventional Air Combustion

Ozsari, Ibrahim; Üst, Yasin; Kayadelen, Hasan Kayhan

doi:10.1007/s13369-020-05130-0

Cited by 21 publications

(3 citation statements)

References 51 publications

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“…The system of equations are solved iteratively using Newton Raphson and Gauss Seidel methods. The achievement of the results and their validation with the GASEQ and NASA CEA programs are detailed in the authors' studies [26,48]. These two published publications can be examined for the accuracy of the combustion code.…”

Section: T a A T A T A T A T R P G Umentioning

confidence: 99%

Energy, economic and environmental analysis and comparison of the novel Oxy- combustion power systems

Ozsari

Üst

2022

Journal of Thermal Engineering

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Oxy-combustion technologies are clean energy systems with zero emission; they have great potential when considering global warming and climate change. This study presents a detailed thermodynamic analysis in terms of energy, environment, and economy. Consequently, the results obtained for an oxy-combustion power system are presented in comparison with a conventional gas turbine power system. The results are presented as a function of the pressure ratio with regard to net power, input heat, system efficiency, sp ecific fue l consumption, equivalence ratio, fuel-air ratio, capital investment cost, fuel cost, oxygen cost, total cost, electricity revenue, and net profit. In addition, the study calculates the pollutant emissions from non-oxy-combustion systems and investigates the environmental costs. The pressure ratio for maximum net power has been obtained as 20.8 in the conventional gas turbine power system. Similarly, the pressure ratios for maximum net power in oxy-combustion power cycles with 26%, 28%, and 30% oxygen ratios are 23.3, 27.4 and 29.7, respectively. Results from 24% to 30% have been displayed to observe the effect of reactant oxygen in the oxy-combustion power cycles. The optimum c ycle c onditions have been determined by calculating the costs of system components, total revenues, and net profits at pressure ratios of 10, 20, 30 and 40. Finally, the results reveal the pressure ratio should be reduced to minimize the total costs per cycle. For maximum net profit, the pressure ratio in a conventional gas turbine power cycle has been calculated as 15.9; similarly, the pressure ratios in oxy-combustion power cycles with 26%, 28%, and 30% oxygen ratios have been respectively calculated as 12.8, 15.2 and 16.4.

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Section: T a A T A T A T A T R P G Umentioning

confidence: 99%

Energy, economic and environmental analysis and comparison of the novel Oxy- combustion power systems

Ozsari

Üst

2022

Journal of Thermal Engineering

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“…The system of equations has been solved iteratively using Newton-Raphson and Gauss-Seidel methods. The achieved results and their validation using the programs GASEQ and NASA CEA are detailed in the authors' studies [81][82][83]. The molar specific heat, enthalpy, and entropy values for each types can be obtained from the following expressions using the curve-fitting coefficients (a1 ... an) for the thermodynamic properties of carbon, hydrogen, oxygen, and nitrogen (CHON) systems [84]:…”

Section: Theoretical Model and Simulationmentioning

confidence: 99%

Untitled

2022

Sigma J Eng Nat Sci - Sigma Müh Fen Bil Derg

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Oxy-combustion technologies are green energy systems and an impressive solution to climate change and global warming. This study presents a detailed exergy analysis obtained for oxy-combustion power systems in comparison with a conventional gas turbine power system. The results include net power, overal thermal efficiency, exergy destruction, exergy efficiency, power density, exergetic performance coefficient (EPC), ecological performance coefficient (ECOP), effective ecological power density (EFECPOD), and mean exergy density (MED), and cost of power density (COPD), which are calculated as functions of pressure and oxygen ratios. The conventional gas turbine power system obtained a pressure ratio for maximum net power of 20.8. Similarly, oxy-combustion power cycles at 26%, 28%, and 30% oxygen ratios have respective pressure ratios for maximum net power of 23.3, 27.4, and 29.7. Results from 24%-30% oxygen ratios are displayed to show the reactant oxygen's effect on the oxy-combustion power cycles. Increases in the pressure ratio show decreases in the total exergy destruction in both the conventional gas turbine power system and the oxy-combustion power systems. Meanwhile, increases in the pressure ratio show increases in the total efficiency, power density, exergy efficiency, EPC, EFFECPOD, and MED in both the conventional gas turbine and the oxy-combustion power systems. In addition, increases in the oxygen ratio in the oxycombustion power systems show different characteristics for these parameters based on the pressure ratio of the cycle. In terms of COPD, conventional gas turbine power systems are more advantageous than oxy-combustion power systems. Optimum COPD is obtained at a pressure ratio of 25.6.

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“…The findings of their research indicated that a reduction in heat release, coupled with the occurrence of product dissociation peaks, leads to an increase in AFT values. In their study, Ozsari et al [10] conducted a comparison of AFT, energy, and emission values for natural gas samples obtained from various countries, including Russia, the USA, Iran, and Australia. The researchers examined the performance of oxy-fuel combustion and conventional combustion with air for these natural gas samples.…”

Section: Introductionmentioning

confidence: 99%

A Graphical User Interface for Calculating Exergy Destruction for Combustion Reactions

Korukҫu

2024

Processes

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The combustion of fuels has been studied by many researchers as it is used in a wide range of engineering applications. The chemical equilibrium approach served as the foundation for the investigation of combustion reactions. This article presents a software application designed to facilitate the calculation of combustion processes by calculating the combustion of 16 fuels among the common alkanes (CnH2n+2) and alcohols (CnH2n+1OH). The Ozan Combustion Calculator (OCC) offers a user-friendly and efficient graphical user interface (GUI) that allows users to easily input data and obtain results. The program was developed using MATLAB 2021a and LaTeX software, ensuring its reliability and accuracy. To perform these calculations, the program utilizes calculations of the thermophysical properties of fuels and water obtained from tables. The program consists of five modules, each serving a specific purpose. These modules calculate various parameters, such as the Adiabatic Flame Temperature, Exergy of Combustion with Dry Air, Exergy of Combustion with Moist Air, Energy of Combustion with Dry Air, and Energy of Combustion with Moist Air. Additionally, the program can be used to investigate the impact of relative humidity on the adiabatic flame temperature and exergy destruction. The results obtained from the calculations reveal that the adiabatic flame temperature exhibits a linear decrease as the relative humidity increases. On the other hand, exergy destruction demonstrates a quadratic increase with higher relative humidity values. The program derives mathematical relationships for the adiabatic flame temperature and exergy destruction with respect to relative humidity values, with a high regression coefficient (r2=0.999). The versatility of OCC makes it suitable for various applications. It can be utilized in university settings for both undergraduate- and graduate-level courses, providing students with a practical tool for studying combustion processes. Additionally, it finds applications in industrial settings for the design and optimization of combustors, gas turbines, and burners. The user-friendly interface and accurate calculations make OCC a valuable resource in the field of combustion engineering.

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Comparative Energy and Emission Analysis of Oxy-Combustion and Conventional Air Combustion

Cited by 21 publications

References 51 publications

Energy, economic and environmental analysis and comparison of the novel Oxy- combustion power systems

Energy, economic and environmental analysis and comparison of the novel Oxy- combustion power systems

Untitled

A Graphical User Interface for Calculating Exergy Destruction for Combustion Reactions

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