Improvement potential of a real geothermal power plant using advanced exergy analysis

Gökgedik, Harun; Yürüsoy, Muhammet; Keçebaş, Ali

doi:10.1016/j.energy.2016.06.079

Cited by 49 publications

(11 citation statements)

References 31 publications

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“…This study aimed to determine which of the components at the Dieng Geothermal Power Plant were creating the greatest energy loss by conducting an exergy analysis. The exergy equation is based on the second law of thermodynamics and can be expressed as shown in Equation 6 (Gökgedik et al, 2016).…”

Section: Exergy Analysismentioning

confidence: 99%

Energy and Exergy Analysis of Dieng Geothermal Power Plant

Qurrahman¹,

Wilopo²,

Susanto³

et al. 2021

IJTech

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Energy and exergy analyses are conducted at the Dieng Geothermal Power Plant to determine the energy loss of components by calculating the efficiency, rate of change in energy flow, and exergy loss of each component. The data were collected on each component, including production wells, turbines, the main condenser, inter-condensers, and cooling towers, with the data collection occurring from April 2017 to March 2018. Energy and exergy analyses begin by calculating the enthalpy and entropy of both input and output from the compiled temperature data, with the help of a steam table. The study results show that the lowest efficiency was 67% in the turbine, and the highest energy change rate seen was 5.8×10 4 kW, in the inter-condenser. In addition, the greatest exergy loss was 50 Mw, which occurred in the turbine, indicating it was the component most in need of repair. In summary, the study results clarified that the component that needed to be treated and repaired at the Dieng Geothermal Power Plant was the turbine.

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Section: Exergy Analysismentioning

confidence: 99%

Energy and Exergy Analysis of Dieng Geothermal Power Plant

Qurrahman¹,

Wilopo²,

Susanto³

et al. 2021

IJTech

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“…The thermodynamic properties of water, air and n-pentane in the developed code are provided by the COOLPROP program [20,21]. In the literature, there are many studies on thermodynamic modelling of binary GPP with ORC [22][23][24][25]. However, for the sake of simplicity, the thermodynamic balance equations at the component level used in the thermodynamic model of the system are not given in the text.…”

Section: Mass Energy and Exergy Analysesmentioning

confidence: 99%

Thermodynamic Optimization of Turbine Lines for Maximum Exergy Efficiency in a Binary Geothermal Power Plant

Keçebaş

2019

Hittite J. Sci. Eng.

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I n recent years due to the limited production and lifetime of fossil resources on earth, and their effects on the health of organisms and climate, awareness of renewable energy resources like geothermal energy has increased worldwide. Considering the issues mentioned in terms of Turkey, the importance of geothermal energy as renewable energy is obvious. Geothermal energy is a clean, safe and reliable source of renewable energy [1]. Generally high temperature resources (T>150 °C) are used for electricity production, while moderate (90 °C

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“…As summarized in Table 1, advanced exergy-based analysis has been initially (from 2006 to 2010) applied to simple systems (e.g., refrigeration system [88] and liquefied natural gas fed cogeneration system [89]) to assist the methodology development, particularly, proposing and comparing different calculation methods. The developed advanced analysis methods have been intensively applied to many different energy systems for various purposes, e.g., evaluating comparatively various power plants with CO 2 capture technologies [90,[103][104][105][106], coal-fired power plants [85,107] with the anomalies diagnosis [108,109], gas-fired power plants [106,110], and concentrated solar thermal and geothermal power plants [98,111]. Most of them perform only advanced exergy analysis and only limited references have done advanced exergoeconomic and exergo-environmental analyses.…”

Section: Advanced Exergy-based Analysismentioning

confidence: 99%

A Review of Evaluation, Optimization and Synthesis of Energy Systems: Methodology and Application to Thermal Power Plants

et al. 2018

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To reach optimal/better conceptual designs of energy systems, key design variables should be optimized/adapted with system layouts, which may contribute significantly to system improvement. Layout improvement can be proposed by combining system analysis with engineers’ judgments; however, optimal flowsheet synthesis is not trivial and can be best addressed by mathematical programming. In addition, multiple objectives are always involved for decision makers. Therefore, this paper reviews progressively the methodologies of system evaluation, optimization, and synthesis for the conceptual design of energy systems, and highlights the applications to thermal power plants, which are still supposed to play a significant role in the near future. For system evaluation, both conventional and advanced exergy-based analysis methods, including (advanced) exergoeconomics are deeply discussed and compared methodologically with recent developments. The advanced analysis is highlighted for further revealing the source, avoidability, and interactions among exergy destruction or cost of different components. For optimization and layout synthesis, after a general description of typical optimization problems and the solving methods, the superstructure-based and -free concepts are introduced and intensively compared by emphasizing the automatic generation and identification of structural alternatives. The theoretical basis of the most commonly-used multi-objective techniques and recent developments are given to offer high-quality Pareto front for decision makers, with an emphasis on evolutionary algorithms. Finally, the selected analysis and synthesis methods for layout improvement are compared and future perspectives are concluded with the emphasis on considering additional constraints for real-world designs and retrofits, possible methodology development for evaluation and synthesis, and the importance of good modeling practice.

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Improvement potential of a real geothermal power plant using advanced exergy analysis

Cited by 49 publications

References 31 publications

Energy and Exergy Analysis of Dieng Geothermal Power Plant

Energy and Exergy Analysis of Dieng Geothermal Power Plant

Thermodynamic Optimization of Turbine Lines for Maximum Exergy Efficiency in a Binary Geothermal Power Plant

A Review of Evaluation, Optimization and Synthesis of Energy Systems: Methodology and Application to Thermal Power Plants

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