Thermoeconomic analysis of combined steam and organic Rankine cycle with primary mover of Allam cycle

Ebadi, Abbas; Saraei, Alireza; Mohsenimonfared, Hamid; Mehrabadi, Saeed Jafari

doi:10.1007/s40095-021-00434-9

Cited by 3 publications

(1 citation statement)

References 20 publications

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“…The combined cycle is configured so that the high temperature waste heat is first used as the evaporator of the steam cycle and the waste heat from the vapor cycle evaporator is used as the low-temperature evaporator of the organic cycle. The study showed that the energy efficiency of the combined cycle is 57% and the exergy efficiency is 66%, the output work is 150,125 kW and the total irreversibility is 91,237 kW [47].…”

Section: Introductionmentioning

confidence: 99%

Thermoeconomic analysis and environmental impact assessment of the Akkuyu nuclear power plant

Saylan,

Aygün

2024

J Therm Anal Calorim

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Within the scope of this study, a thermoeconomic analysis was carried out for Akkuyu Nuclear Power Plant (ANPP), the first nuclear power plant of Türkiye. As a result of the analysis, it is aimed to reduce the cost of energy production and prevent thermal pollution at the same time by converting the heat discharged into the environment into useful heat due to the working principle of NPP. Thermodynamic analysis was performed in the Engineering Equation Solver (EES) program using equipment values equivalent to ANPP. Cost analysis was performed using the specific exergy costing (SPECO) method, which is based on the second law of thermodynamics and is the most widely used cost analysis method. The study concludes that the energy efficiency is 35%, while the economic analysis shows that the best case has an exergy efficiency of 68% with a payback period of 7–8 years, and an electricity cost of $0.0196 per kWh. It is possible to use the heat discharged from the plant indirectly in district heating (heating, hot water needs of the lodgings, guesthouses in the facility), greenhouse heating, agricultural drying and heating, considering the geographical conditions and livelihood of the region. Thus, 68% of the waste heat was utilized, the unit cost of the energy produced was reduced and at the same time thermal pollution was reduced at the same rate. The results of the study can contribute to the efforts preventing energy waste, thermal environmental pollution, and reducing greenhouse gas emissions. Additionally, it could aid in the development of more energy-efficient and environmentally friendly power generation systems, including pioneering nuclear power plants in developing countries.

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Section: Introductionmentioning

confidence: 99%

Thermoeconomic analysis and environmental impact assessment of the Akkuyu nuclear power plant

Saylan,

Aygün

2024

J Therm Anal Calorim

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Thermodynamic analysis of the biomass gasification Allam cycle

Cai

Yan

et al. 2023

Fuel

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Performance analysis of a modified Allam cycle combined with an improved LNG cold energy utilization method

Wu,

Wang,

Liu

et al. 2024

Journal of Renewable and Sustainable Energy

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The Allam cycle is a promising power cycle that could achieve 100% carbon capture as well as high efficiency. In order to further enhance system operating performance, here we propose a modified Allam cycle with an improved liquified natural gas (LNG) cold energy utilization method. The flow rate fluctuation of LNG is suppressed by variable speed adjustment of the air compressor, and the cold energy of LNG is transferred to liquid oxygen, which could implement a stable cold energy supply. The whole process is modeled including air separation unit and LNG supply path. Furthermore, the system thermodynamic and economic performance is evaluated through parametric analysis, and the proposed system superiority is highlighted by comparing with conventional Allam-LNG cycle. The results indicate that the system could achieve 70.93% of net thermal efficiency, 65.17% of electrical efficiency, and $403.63 million of net present value, which performs 5.76% and 6.48% enhancement of efficiency and 11% improvement of economic revenue. Moreover, the system off-design operation is assessed; 87% to 100% of compressor speed adjustment range is determined that could cope with −13% to 9% of LNG flow rate fluctuation.

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Thermoeconomic analysis of combined steam and organic Rankine cycle with primary mover of Allam cycle

Cited by 3 publications

References 20 publications

Thermoeconomic analysis and environmental impact assessment of the Akkuyu nuclear power plant

Thermoeconomic analysis and environmental impact assessment of the Akkuyu nuclear power plant

Thermodynamic analysis of the biomass gasification Allam cycle

Performance analysis of a modified Allam cycle combined with an improved LNG cold energy utilization method

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