Advanced exergy and exergo-economic analyses of an advanced adiabatic compressed air energy storage system

Güleryüz, Esra Hançer; Özen, Dilek Nur

doi:10.1016/j.est.2022.105845

Cited by 16 publications

(3 citation statements)

References 54 publications

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“…On the other hand, the exergy destruction of the k -th component is determined by equation (8) [ 34 ].

where E F, k and E P, k denote the fuel and product exergy, respectively.…”

Section: Thermodynamic Modelmentioning

confidence: 99%

Exergy destruction analysis of a power generation system utilizing the cold energy of LNG

Wan,

Bai,

Zhou

2023

Heliyon

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“…On the other hand, the exergy destruction of the k -th component is determined by equation (8) [ 34 ].

where E F, k and E P, k denote the fuel and product exergy, respectively.…”

Section: Thermodynamic Modelmentioning

confidence: 99%

Exergy destruction analysis of a power generation system utilizing the cold energy of LNG

Wan,

Bai,

Zhou

2023

Heliyon

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“…A multiobjective utilization model for thermal systems was developed, using the system's energy cost minimization and energy efficiency maximization as the optimization functions [36]. In conclusion, sophisticated exergy analysis gives the designer a thorough roadmap for the system's optimization potential and economic savings [37].…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of a Shell and Tube Energy Storage Unit with Different Inclination Angles

Cao

Mao

2023

Energies

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To optimize the utilization of solar energy in the latent heat thermal energy storage (LHTES) system, this study conducts exergy analysis on a paraffin-solar water shell and tube unit established in the literature to evaluate the effects of different inclination angles, inlet temperatures, original temperatures, and fluid flow rates on the exergy and exergy efficiency. Firstly, the thermodynamic characteristics of the water and the natural convection effects of the paraffin change with different inclination angles. When the inclination angle of the heat storage tank is less than 30°, the maximum exergy inlet rate rises from 0 to 144.6 W in a very short time, but it decreases to 65.7 W for an inclination angle of 60°. When the inclination angle is increased from 0° to 30°, the exergy efficiency rises from 86% to 89.7%, but it decreases from 94% to 89.9% with the inclination angle from 60° to 90°. Secondly, under the condition that the inclination angle of the energy storage unit is 60°, although increasing the inlet temperature of the solar water enhances the exergy inlet and storage and reduces the charging time, it increases the heat transfer temperature difference and the irreversible loss of the system, thus reducing the exergy efficiency. As the inlet water temperature is increased from 83 to 98 °C, the exergy efficiency decreases from 94.7% to 93.6%. Moreover, increasing the original temperature of the LHTES unit not only reduces the exergy inlet and storage rates but also decreases the available work capacity and exergy efficiency. Finally, increasing the inlet water flow rate increases the exergy inlet and storage rates slightly. The exergy efficiency decreases from 95.6% to 93.3% as the unit original temperature is increased from 15 to 30 °C, and it is enhanced from 94% to 94.6% as the inlet flow rate is increased from 0.085 to 0.34 kg/s with the unit inclination angle of 60°. It is found that arranging the shell and tube unit at an inclination angle is useful for improving the LHTES system’s thermal performance, and the exergy analysis conducted aims to reduce available energy dissipation and exergy loss in the thermal storage system. This study provides instructions for solar energy utilization and energy storage.

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“…SYSTEM EXERGY VALUEBased on the data in TableII, the Physical Exergy value is calculated by equation (2), then chemical exergy is calculated by equation(3). Furthermore, the total exergy is calculated by equation(1). So that the physical exergy, chemical exergy, and total exergy values obtained from each state, the data are presented in table3.…”

mentioning

confidence: 99%

Exergy Analysis of Coal-Based 2 X 7 MW Steam Power Plant

Hermawan,

Idris,

Wibisono

et al. 2023

IJEEPSE

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In this study, an analysis was conducted on a steam power plant system with a capacity of 2 x 7 MW based on coal. The coal fuel used by the majority of refined sizes is not in accordance with the recommendations of the American Society of Mechanical Engineers (ASME). The main objective of the study was to analyze the system components separately and to measure the exergy value of the components, covering the electrical energy so that it is known which equipment experiences the greatest energy loss as well as knowing the efficiency value of the equipment used. Efficiency and exergy are calculated using plant operation data. The results of the study found that the largest exergy destruction occurred in boilers, meaning that there was the largest energy loss in this section with a value of 37.34 MW (16.71%), while the destruction of the smallest exergy occurred in condensers of 0.58 MW (99.24%).

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Advanced exergy and exergo-economic analyses of an advanced adiabatic compressed air energy storage system

Cited by 16 publications

References 54 publications

Exergy destruction analysis of a power generation system utilizing the cold energy of LNG

Exergy destruction analysis of a power generation system utilizing the cold energy of LNG

Exergy Analysis of a Shell and Tube Energy Storage Unit with Different Inclination Angles

Exergy Analysis of Coal-Based 2 X 7 MW Steam Power Plant

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