Exergetic sustainability evaluation of irreversible Carnot refrigerator

Açıkkalp, Emin

doi:10.1016/j.physa.2015.04.036

Cited by 31 publications

(7 citation statements)

References 75 publications

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“…Within this scope, sustainable development deals with the future of energy utilization, depletion of energy sources, economic growth and so on. In different fields of science, as well as energy science and engineering, numerous methods are utilised for the evaluation of sustainability [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…In addition to performance evaluation, the exergy analysis method has also been used for sustainability assessment and discussion regarding sustainable energy utilization. A short literature survey shows the importance and necessity of exergy and exergy-based sustainability assessment methods for energy engineering and science [9,[12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sustainability Metrics of a Small Scale Turbojet Engine

Ekici

Şöhret

Coban

et al. 2018

International Journal of Turbo &Amp; Jet-Engines

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Over the last decade, sustainable energy consumption has attracted the attention of scientists and researchers. The current paper presents sustainability indicators of a small scale turbojet engine, operated on micro-aerial vehicles, for discussion of the sustainable development of the aviation industry from a different perspective. Experimental data was obtained from an engine at full power load and utilized to conduct an exergy-based sustainability analysis. Exergy efficiency, waste exergy ratio, recoverable exergy ratio, environmental effect factor, exergy destruction factor and exergetic sustainability index are evaluated as exergetic sustainability indicators of the turbojet engine under investigation in the current study. The exergy efficiency of the small scale turbojet engine is calculated as 27.25 % whereas the waste exergy ratio, the exergy destruction factor and the sustainability index of the engine are found to be 0.9756, 0.5466 and 0.2793, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sustainability Metrics of a Small Scale Turbojet Engine

Ekici

Şöhret

Coban

et al. 2018

International Journal of Turbo &Amp; Jet-Engines

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“…Dimensionless power density and thermal efficiency were optimized for Braysson cycles using Nondominated Sorting Genetic Algorithm (NSGA) and finite time thermodynamic analysis [15]. Açıkkalp [16] investigated irreversible refrigeration cycle by using exergetic sustainability index. In that study, it was recommended that exergetic sustainability index an important parameter for the environmental effects of any system.…”

Section: Introductionmentioning

confidence: 99%

Exergoeconomic multi objective optimization and sensitivity analysis of a regenerative Brayton cycle

Naserian

Farahat

Sarhaddi

2016

Energy Conversion and Management

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“…Açıkkalp [74] used five different methods to assess the irreversible Carnot heat engine cycle, and determined that the ecological function was the most advantageous and convenient criteria. For Carnot refrigerators, Açıkkalp [75] presented the exergetic sustainability index to evaluate refrigeration cycle, investigated its relationships with ecological function, and compared the calculation results from the ecological function. Based on a thermo-ecological criterion, Ahmadi et al [76] and Sahraiea et al [77] made optimization investigations of a three-heat-source absorption heat pump and a two-stage irreversible heat pump, respectively, and the coefficient of performance and the ecological coefficient of performances were optimized simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Analysis and optimization with ecological objective function of irreversible single resonance energy selective electron heat engines

Zhou

Chen

Ding

et al. 2016

Energy

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a b s t r a c tEcological performance of a single resonance ESE heat engine with heat leakage is conducted by applying finite time thermodynamics. By introducing Nielsen function and numerical calculations, expressions about power output, efficiency, entropy generation rate and ecological objective function are derived; relationships between ecological objective function and power output, between ecological objective function and efficiency as well as between power output and efficiency are demonstrated; influences of system parameters of heat leakage, boundary energy and resonance width on the optimal performances are investigated in detail; a specific range of boundary energy is given as a compromise to make ESE heat engine system work at optimal operation regions. Comparing performance characteristics with different optimization objective functions, the significance of selecting ecological objective function as the design objective is clarified specifically: when changing the design objective from maximum power output into maximum ecological objective function, the improvement of efficiency is 4.56%, while the power output drop is only 2.68%; when changing the design objective from maximum efficiency to maximum ecological objective function, the improvement of power output is 229.13%, and the efficiency drop is only 13.53%.

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Exergetic sustainability evaluation of irreversible Carnot refrigerator

Cited by 31 publications

References 75 publications

Sustainability Metrics of a Small Scale Turbojet Engine

Sustainability Metrics of a Small Scale Turbojet Engine

Exergoeconomic multi objective optimization and sensitivity analysis of a regenerative Brayton cycle

Analysis and optimization with ecological objective function of irreversible single resonance energy selective electron heat engines

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