Exergoeconomic and exergoenvironmental analysis of a combined heating and power system driven by geothermal source

Huang, Wenge; Lu, Zhiqu; Wang, Sheng

doi:10.1016/j.enconman.2020.112765

Cited by 54 publications

(5 citation statements)

References 24 publications

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“…Reducing the exergy destruction environmental impact of solar collectors (including HST) and the component-related environmental impact of regenerators can make a significant contribution to improving the environmental benefits of the system. If a component’s exergoenvironmental factor exceeds 70%, the component-related factor is the primary source of its environmental impact; conversely, if the factor is below 30%, exergy destruction is the main source of its environmental impact . Therefore, from the results, it is evident that the environmental impact of the solution pump mostly comes from the component-related, while the environmental impact of other components is dominated by the exergy destruction.…”

Section: Results and Discussionmentioning

confidence: 96%

“…Multiobjective optimization (MOO) is an effective method for finding the optimal solution of multiple objective functions. , There are also increasing studies based on MOO to determine the optimal operating conditions of systems. Esfahani et al performed an MOO on the analysis results of trough solar collectors, which improved the overall performance of the collectors.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation and Optimization of an Integrated Refrigeration and Dehumidification Process for Solar Energy Cascade Utilization Based on Exergy, Exergoeconomic, and Exergoenvironmental Analyses

Xu,

Luo,

Zeng

et al. 2024

ACS Sustainable Chem. Eng.

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In this work, an innovative solar-powered integrated system coupling absorption refrigeration with liquid dehumidification is proposed. This system can effectively achieve the cascade utilization of solar energy. The exergy, exergoeconomic, and exergoenvironmental analyses are conducted to evaluate the techno-economics and environmental benefits of the proposed system. A parametric study is performed to determine the effect of air humidity, refrigeration temperature, and segment temperature on the total exergy destruction (ExḊ , total ), exergy efficiency (ε ex ), total exergoeconomic cost rate (R ̇total ), and total exergo-environmental impact rate (B ̇total ) of the system. Three objective functions, ε ex , R ̇total , and B ̇total are selected for multiobjective optimization (MOO). The results indicate that the ExḊ , total , ε ex , R ̇total , and B ̇total of the system are 516.584 kW, 43.176%, 59.171 $/h, and 2307.216 mPts/h, respectively. When the air humidity increases, the exergy efficiency, economy, and environmental benefits of the system all decrease. The increase in refrigeration temperature causes the ExḊ , total and B ̇total to increase by 9.85 and 5.02%, ε ex and R ̇total decreased by 11.42 and 3.03%. The system has a higher exergy efficiency at a higher segment temperature. According to the system MOO results, the optimal solutions for ε ex , R ̇total , and B ̇total are 44.88%, 57.24 $/h, and 2281.77 mPts/h, respectively. Among them, ε ex has increased by 3.80% compared to the original solution, and R ̇total and B ̇total have decreased by 3.26 and 1.10%, respectively. This work provides a reference scheme for the development and optimization of solar-integrated systems.

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Section: Results and Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Evaluation and Optimization of an Integrated Refrigeration and Dehumidification Process for Solar Energy Cascade Utilization Based on Exergy, Exergoeconomic, and Exergoenvironmental Analyses

Xu,

Luo,

Zeng

et al. 2024

ACS Sustainable Chem. Eng.

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“…The general framework of the Exergo-Environmental Analysis (EEvA) is similar to that of an EEA. EEvA has been applied to geothermal power plants in recent studies (Basogul, 2019;Huang et al, 2020;Cao and Ehyaei, 2021), but a comprehensive description of the methodology including its link to LCA, as well as a comparative analysis of different plants, is substantially missing and will be presented in the following.…”

Section: Exergo-environmental Analysismentioning

confidence: 99%

Exergo-Economic and Exergo-Environmental Assessment of Two Large Chp Geothermal Power Plants

Manfrida

Talluri

Ungar

et al. 2023

Preprint

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“…In addition to geothermal power generation, hydrothermal geothermal resources can be directly utilized for heating or cooling buildings [18]. The National Energy Administration aims to increase the area of geothermal heating (cooling) in the country by 50% by 2025 compared to 2020 [19].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Different Mining Modes on the Heat Extraction Performance of Hydrothermal Geothermal Energy

Ma,

Liu,

Wang

et al. 2024

Energies

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Hydrothermal geothermal energy, as a widely distributed, large reserve and easily exploitable renewable source, can be used for both power generation and building heating. In this study, a numerical simulation of heat extraction performance is conducted based on monitoring well temperature data in a geothermal field in Xiong’an New Area. The effects of the reinjection temperature, injection flow rate, and reinjection rate on the outlet temperature and the reservoir temperature during a long-term operation are analyzed. The results indicate that the lower reinjection temperature can generate a critical disturbance scope for the thermal reservoir during the exploitation process. The impact scope on the thermal reservoir can reach 210.3 m at a reinjection temperature of 25 °C, which is not conducive to maintaining the outlet temperature of production wells in the long-term. The reinjection rate significantly affects both the horizontal and vertical temperature fields of the thermal reservoir. Under reinjection conditions of 30 °C and 40 kg/s, the horizontal and vertical impact scope of the thermal reservoir are 262.3 and 588.5 m, respectively. The reinjection rate is inversely related to the outlet temperature. A decrease from 100% to 70% in the reinjection rate can increase the outlet temperature by 4.21%. However, a decrease in the reinjection rate will lead to a decline in the groundwater level. Therefore, balancing the variation in outlet temperature and groundwater level is crucial in practical engineering.

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Exergoeconomic and exergoenvironmental analysis of a combined heating and power system driven by geothermal source

Cited by 54 publications

References 24 publications

Evaluation and Optimization of an Integrated Refrigeration and Dehumidification Process for Solar Energy Cascade Utilization Based on Exergy, Exergoeconomic, and Exergoenvironmental Analyses

Evaluation and Optimization of an Integrated Refrigeration and Dehumidification Process for Solar Energy Cascade Utilization Based on Exergy, Exergoeconomic, and Exergoenvironmental Analyses

Exergo-Economic and Exergo-Environmental Assessment of Two Large Chp Geothermal Power Plants

The Influence of Different Mining Modes on the Heat Extraction Performance of Hydrothermal Geothermal Energy

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