Exergoeconomic analysis of a solar-powered/fuel assisted Rankine cycle for power generation

Cavalcanti, Eduardo José Cidade; Motta, Henrique Pereira

doi:10.1016/j.energy.2015.05.081

Cited by 38 publications

(9 citation statements)

References 13 publications

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“…Conventional exergy analysis, a powerful tool for performing such tasks, has been widely applied in evaluation of the thermodynamic performance of energy conversion processes [2,3]. For example, Gao et al [4,5] adopted conventional exergy analysis to evaluate a coal based polygeneration process, and Li et al [6] applied conventional exergy analysis to compare three typical oil shale retorting processes.…”

Section: Introductionmentioning

confidence: 99%

Framework for advanced exergoeconomic performance analysis and optimization of an oil shale retorting process

Yang

Qian

Krasławski

et al. 2016

Energy

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Section: Introductionmentioning

confidence: 99%

Framework for advanced exergoeconomic performance analysis and optimization of an oil shale retorting process

Yang

Qian

Krasławski

et al. 2016

Energy

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“…Higher values of relative cost difference indicate that less effort is required for optimization of the system. The values in scientific literature vary between 1 and 1000%: In [16], values ranged from 6% to 367%; in [17] values varied between 14% and 620%; and in [18], values ranged from 34 to 147%.…”

Section: Introductionmentioning

confidence: 99%

Tackling Dissipative Components Based on the SPECO Approach: A Cryogenic Heat Exchanger Used in Natural Gas Liquefaction

Cavalcanti

Carvalho

2021

Energies

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The cryogenic industry has been experiencing continuous progress in recent years, primarily due to the global development of oil and gas activities. Natural gas liquefaction is a cryogenic process, with the refrigeration system being crucial to the overall process. The objective of the study presented herein is to carry out an exergoeconomic assessment for a dual nitrogen expander process used to liquefy natural gas, employing the SPecific Exergy COsting (SPECO) methodology. The air coolers and throttling valve are dissipative components, which present fictitious unit cost rates that are reallocated to the final product (Liquefied Natural Gas). The liquefaction process has an exergy efficiency of 41.89%, and the specific cost of liquefied natural gas is 292.30 US$/GJ. It was verified that this cost increased along with electricity. The highest exergy destruction rates were obtained for Expander 1 and Air cooler 2. The highest average cost per exergy unit of fuel was obtained for the vertical separator, followed by Air coolers 1 and 2. An assessment of the exergoeconomic factor indicated that both expanders could benefit from a decrease in exergy destruction, improving the exergoeconomic performance of the overall system. Regarding the relative cost difference, all compressors presented high values and can be enhanced with low efforts.

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“…Some researches including [7], [8] and [9] conducted thermoeconomic analysis of diesel engine powered cogeneration (CHP) systems. Surveys such as that performed by Cavalcanti and Motta [10] and Tempesti et al [11] examined the relationship between monetary unit costs and exergy destruction of CHP systems with integrated renewable energy resources. Trigeneration systems are investigated from thermoeconomic point of view by Palomino and Nebra [12], Temir and Bilge [13], and Balli and Aras [14].…”

Section: Introductionmentioning

confidence: 99%

Thermoeconomic Analysis of Biogas Engines Powered Cogeneration System

Chakyrova¹

2019

Journal of Thermal Engineering

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This study presents an analysis of an existing biogas engines-powered cogeneration system installed in Varna Wastewater Treatment Plant, Bulgaria using thermoeconomic method. The thermoeconomic analysis is conducted using three different groups of environmental conditions. The SPECO (specific exergy cost) method is applied to the system and cost balance equations are formulated for each component. The fuel F and the product P rules are used to obtain auxiliary equations. Moreover, in this paper, various thermoeconomic performance parameters such as the cost of exergy destruction, the relative cost difference and the exergoeconomic factor are determined. The obtained results show that the specific unit exergetic cost of the electrical power produced by the cogeneration system are found to be 30.0€/GJ = 0.11€/kWh, while the conducted thermoeconomic analysis based on energy delivers a result of 0.19€/kWh for the electrical work produced by biogas engines. In addition, the obtained results are compared to those seen in similar studies.

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Exergoeconomic analysis of a solar-powered/fuel assisted Rankine cycle for power generation

Cited by 38 publications

References 13 publications

Framework for advanced exergoeconomic performance analysis and optimization of an oil shale retorting process

Framework for advanced exergoeconomic performance analysis and optimization of an oil shale retorting process

Tackling Dissipative Components Based on the SPECO Approach: A Cryogenic Heat Exchanger Used in Natural Gas Liquefaction

Thermoeconomic Analysis of Biogas Engines Powered Cogeneration System

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