Influence of a recuperator on the performance of the semi-closed oxy-fuel combustion combined cycle

Choi, Byeong Seon; Kim, Min Jae; Ahn, Ji Ho; Kim, Tong Seop

doi:10.1016/j.applthermaleng.2017.06.055

Cited by 29 publications

(6 citation statements)

References 27 publications

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“…And in conventional power cycles, air reacts with fuel in the combustion process. 7 There are studies on the characteristics and performance of combustion with basic calculation methods in the literature. While, in oxy-combustion technology, carbon dioxide in the combustion products is captured.…”

Section: Discussionmentioning

confidence: 99%

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Effect of varying fuel types on oxy‐combustion performance

Ozsari

Üst

2019

Int J Energy Res

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Summary In search for clean energy solutions in a global warming era, oxy‐fuel combustion systems are promising. In the study, combustion products are calculated, and exergy analysis is done using the proposed multifeature equilibrium combustion model. And the results obtained for oxy‐combustion of different fuels at various oxygen fractions are given in comparison with conventional combustion. For validation, the model results are compared with popular combustion calculation tools, GASEQ and CEA. Effect of oxygen content on oxy‐combustion exergy analysis is calculated, also considering changes in equivalence ratio and combustion chamber inlet temperature. Moreover, indicating parameters for combustion performance, temperature ratio, chemical exergy, physical exergy, total specific exergy, and exergy destruction are utilized in the calculations elaborately. Changes in combustion product mole fractions are explained for rich and lean combustion regions. And also, specific exergy results are presented. In terms of exergy destruction, oxy‐combustion is more advantageous than conventional combustion. It has been shown that exergy destruction in combustion process with conventional air is approximately 1.5 times higher compared with 21% oxy‐combustion, both at different equivalence ratios and at different combustion chamber inlet temperatures. Nowadays, environment‐friendly, clean energy production systems are growing in numbers. In this concept, exergetic analyses of combustion for different fuels and greener natural gas, compared with diesel, gasoline, and methanol, are given in comparison. Considering four fuel types, advantageous and disadvantageous cases are presented for oxy‐combustion at different oxygen fractions and conventional combustion. As a result, diesel fuel is more advantageous than the other three fuel types, in terms of temperature ratio and exergy. Natural gas combustion appears to be disadvantageous in terms of specific exergy and temperature ratio, but it is the most advantageous in terms of exergy destruction. Consequently, distinctive comparison is done for oxy‐combustion and conventional combustion, determining positive and negative effects for different fuels.

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Section: Discussionmentioning

confidence: 99%

“…5,6 Oxy-combustion technologies, either using CO 2 and/or steam, are also realized in combined power plants. 7 There are studies on the characteristics and performance of combustion with basic calculation methods in the literature. Additionally, the effect of water injection on combustion was investigated with the same calculation method.…”

Section: Introductionmentioning

confidence: 99%

Effect of varying fuel types on oxy‐combustion performance

Ozsari

Üst

2019

Int J Energy Res

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“…The main parts of the capital investment for oxy-fuel facility buildup are the construction work and the recuperator price [48,49]. When the initial temperature is increased from 1100 to 1500 • C, the turbine price increases considerably.…”

Section: Methods For the Financial Feasibility Study Of Oxy-fuel Power Facilities Constructionmentioning

confidence: 99%

Techno-Economic Analysis of the Oxy-Fuel Combustion Power Cycles with Near-Zero Emissions

et al. 2021

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This paper is devoted to improvement of environmental safety in hydrocarbon-firing TPPs. Despite the development of renewable power sources, the number of traditional power production facilities continues its growth. The toxic emission mitigation in traditional TPPs has been deeply investigated, but the problem of greenhouse gas atmospheric emissions is of topical interest. Oxy-fuel technology reduces CO2 emissions and is highly efficient and environmentally safe. Also, it requires relatively low capital investments. Thermal efficiency analysis shows that the Allam cycle facilities have the best efficiency. Their thermodynamic parameters can be optimized with minimal primary costs and capital investments. This newly developed analysis was used to compare the investment efficiency of projects for the buildup of oxy-fuel and combined cycle facilities. Without emission quote payments, the NPV of combined cycle projects is 16% higher, as well as having a lower DPP. The electricity production primary costs in oxy-fuel and combined cycle facilities are similar, which reflects the technologies’ similarity and similar fuel costs. Implementation of carbon dioxide emission quote marketing makes oxy-fuel facilities more investment-attractive. Parametric studies show that when Russia implements CO2 emission quotes compatible with the current EU level, an oxy-fuel facility erection project will be financially reasonable. Thus, it can be concluded that the construction of oxy-fuel power plants is one of the most promising and investment-attractive solutions to reduce CO2 emissions in the energy sector for large industrialized countries. The managerial consequences of their implementation will include the stabilization of greenhouse gas emissions while ensuring the financial stability of the energy industry.

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“…These schemes are free from the water production expenses, which is an advantage. It should be noted that preliminary cooling of the coolant flow may also improve the R-SCOC-CC efficiency [18]. However, the increase in efficiency will be lower compared to SCOC-CC due to lower values of the compressor outlet pressure causing the moderate temperature of the coolant.…”

Section: Structural and Parametric Optimization Of The Semiclosed Oxy-fuel Combustion Combined Cyclementioning

confidence: 99%

“…Numerous papers disclose the results of research and development of methods for increasing efficiency of the existing oxy-fuel combustion power cycles. In particular, a possible way to increase efficiency of the SCOC-CC cycle is an application of the additional recuperator in the heat recovery system [18]. The net efficiency of the R-SCOC-CC is higher compared to SCOC-CC by 0.6 and 1.3% in the F-and H-class gas turbines cases, respectively.…”

Section: Introductionmentioning

confidence: 99%

Research and Development of the Oxy-Fuel Combustion Power Cycles with CO2 Recirculation

Rogalev

Kindra

et al. 2021

Energies

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The transition to oxy-fuel combustion power cycles is a prospective way to decrease carbon dioxide emissions into the atmosphere from the energy sector. To identify which technology has the highest efficiency and the lowest emission level, a thermodynamic analysis of the semiclosed oxy-fuel combustion combined cycle (SCOC-CC), the E-MATIANT cycle, and the Allam cycle was carried out. The modeling methodology has been described in detail, including the approaches to defining the working fluid properties, the mathematical models of the air separation unit, and the cooled gas turbine cycles’ calculation algorithms. The gas turbine inlet parameters were optimized using the developed modeling methodology for the three oxy-fuel combustion power cycles with CO2 recirculation in the inlet temperature at a range of 1000 to 1700 °C. The effect of the coolant flow precooling was evaluated. It was found that a decrease in the coolant temperature could lead to an increase of the net efficiency up to 3.2% for the SCOC-CC cycle and up to 0.8% for the E-MATIANT cycle. The final comparison showed that the Allam cycle’s net efficiency is 5.6% higher compared to the SCOC-CC cycle, and 11.5% higher compared with the E-MATIANT cycle.

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Influence of a recuperator on the performance of the semi-closed oxy-fuel combustion combined cycle

Cited by 29 publications

References 27 publications

Effect of varying fuel types on oxy‐combustion performance

Effect of varying fuel types on oxy‐combustion performance

Techno-Economic Analysis of the Oxy-Fuel Combustion Power Cycles with Near-Zero Emissions

Research and Development of the Oxy-Fuel Combustion Power Cycles with CO2 Recirculation

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