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Evolution, status, and trends of exergy research: a systematic analysis during 1997–2020

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Abstract

Exergy analysis, as a core evaluation tool to improve energy efficiency and system sustainability, has been applied in various fields over the last decades, leading to a significant increase of exergy-related publications. However, the existing reviews only analyzed part of publications related to a specific topic and lack a systematic analysis. To fill this research gap, a coupled bibliometric analysis and knowledge map method was conducted on 13,941 exergy-related publications during 1997–2020. Results show that publications increased from 54 in 1997 to 1976 in 2020. Journal of Energy is the most productive journals (1543 publications), and Energy & Fuels is the most popular subject category (9204 publications). Three developing countries in Asia (China, Iran, and Turkey) are the most productive, accounting for 45.87%. The main research objects and methods in this field were identified by cluster analysis. Furthermore, timeline analysis and burst detection analysis show that the new research hotspots or research frontiers will focus on organic Rankine cycle, building industry, multi-objective optimization, and sustainable development. This study further pointed out the future direction of the exergy field: in-depth application of the coupled exergy and exergoeconomic analysis; technologies development for efficient utilization of renewable energy, clean energy, and waste heat; enrichment of exergy framework incorporating environmental perspectives and mathematical methods; adaptation of theoretical research; and system optimization to the needs of social development. Through the review of exergy-related publications, results of this study can help to better identify the research hotspots and provide a valuable reference for future research.

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All data generated or analyzed during this study are included in this published article and its supplementary information files.

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Acknowledgements

The authors thank the editors and reviewers for their valuable comments.

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Authors and Affiliations

Authors

Contributions

Peibei Zhang: methodology, visualization, and writing — original draft; Qiang Jin: conceptualization, writing — review and editing and supervision.

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Correspondence to Qiang Jin.

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The authors declare no competing interests.

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Responsible Editor: Philippe Garrigues

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Highlights

• A total of 13,941 exergy-related publications during 1997–2020 are investigated.

• Bibliometric analysis and knowledge mapping are coupled to study this field.

• Research hotspots are identified by cluster analysis of keywords and references.

• The timeline and burst detection analysis are used to explore the research evolution.

• Research trends are predicted based on the time variation of high-frequency keywords.

Supplementary Information

11356_2022_22915_MOESM1_ESM.doc

The online version contains supplementary material available at https://doi.org/10.1007/s11356-022-22915-y.

Supplementary file1 (DOC 158 KB)

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Zhang, P., Jin, Q. Evolution, status, and trends of exergy research: a systematic analysis during 1997–2020. Environ Sci Pollut Res 29, 73769–73794 (2022). https://doi.org/10.1007/s11356-022-22915-y

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  • DOI: https://doi.org/10.1007/s11356-022-22915-y

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