Multi-criteria performance optimization and analysis of a gas–steam combined power system

Gonca, Güven; Başhan, Veysi

doi:10.1007/s40430-019-1871-z

Cited by 7 publications

(2 citation statements)

References 101 publications

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“…Due to the high power density, high conversion efficiency, stability, and reliability, the closed Brayton cycle and its combined cycles have been used in aircraft, the marine industry, power plants, and space-based power plants. Some scholars (Gonca & Sahin, 2016;Gonca, 2017aGonca, , 2017bGonca, , 2018Gonca & Genc, 2019;Gonca & Başhan, 2019;Gonca & Guzel, 2022) have optimized gas turbine cycles (Gonca & Sahin, 2016;Gonca, 2017aGonca, , 2018, gas-mercury cycles (Gonca, 2017b;Gonca & Genc, 2019) and gas-steam combined cycles (Gonca & Başhan, 2019;Gonca & Guzel, 2022) with exergetic (Gonca, 2017a(Gonca, , 2017bGonca & Guzel, 2022), exergo-economic (Gonca & Guzel, 2022) and thermo-ecological (Gonca & Sahin, 2016;Gonca, 2017aGonca, , 2017bGonca, , 2018Gonca & Genc, 2019;Gonca & Başhan, 2019) performances as the optimization objectives and analyzed the effects of different working fluids, turbine operations, and design parameters on cycle performances.…”

Section: Introductionmentioning

confidence: 99%

Optimizing power of a variable-temperature heat reservoir Brayton cycle for space nuclear power plant

Wang

Chen

et al. 2023

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This study establishes a variable-temperature heat reservoir endoreversible simple closed Brayton cycle model for a nuclear power plant in space and derives its thermal efficiency (TEF) and power output (POW). The maximum POW (P max ) for a fixed total heat transfer area of a radiator panel and two heat exchangers (HEXs) is obtained by optimizing the area distributions ( f H , f L , and f R ) among the two HEXs and radiator panel, the double maximum POW (P max,2 ) is obtained by optimizing the inlet temperature (TL in ) of the cooling fluid in the low temperature heat sink, and the triple maximum POW (P max,3 ) is further obtained by optimizing the thermal capacity rate matching (C Wf /C H ) between the heat reservoir and working fluid. When f H , f L , and f R , are optimized, P max increases by 4.33% compare to the initial POW (P); when T Lin is furtherly optimized, P max,2 increases by 6.33% compare to P and increases by 1.86% compared to P max , with P max,3 increasing by 11.76%, 7.13%, and 5.17% compared to P, P max , and P max,2 , respectively.

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Section: Introductionmentioning

confidence: 99%

Optimizing power of a variable-temperature heat reservoir Brayton cycle for space nuclear power plant

Wang

Chen

et al. 2023

Seatific

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“…Gonca [64] first proposed this criterion for the Brayton power cycle. Moreover, commonly used power cycles such as reheated and intercooled Brayton cycles with variable specific heat [65][66][67], combined gas-steam [68], combined gas-mercury-steam [69], combined dual-Miller-Rankine [70], and diesel cycles [71] have also been analyzed and the effects of design parameters on performance criteria investigated. Generally, the results show that using EFECPOD during the design phase allows more realistic inferences.…”

Section: Introductionmentioning

confidence: 99%

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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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