Data-Driven Visualization of the Dynamics of Geothermal Energy and Hot Dry Rock Research

Xiangcheng Que, Shu Zhu () and Bei Han
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Xiangcheng Que: Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
Shu Zhu: Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
Bei Han: Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China

Energies, 2025, vol. 18, issue 9, 1-24

Abstract: Geothermal energy and hot dry rock (HDR), as an important clean energy technology, have garnered widespread attention globally in recent years. Enhanced Geothermal Systems (EGS), a technology for extracting energy from low-permeability Hot Dry Rock (HDR) reservoirs, is crucial for the utilization of geothermal energy. Although interest in this area has significantly increased, a comprehensive and systematic analysis providing a clear understanding of the development context is still lacking. To this end, this paper presents a bibliometric analysis of 1764 relevant publications from 1996 to 2023, revealing research trends and hotspots in this field. Utilizing tools such as Bibliometrix (Version 4.2.3), CiteSpace (Version 6.2.R2), and VOSviewer (Version 1.6.19), the study analyzes publication trends, subject categories, journals, authors, institutions, and national contributions. The results indicate that EGS technology, rock mechanical behavior, and environmental impact assessment are the primary research hotspots, with China being the leading country in terms of publication volume. Future research directions include technological optimization, environmental sustainability, and the advancement of interdisciplinary collaboration. This study provides a valuable reference for further research and application in geothermal energy and HDR and offers a dynamic perspective on shifting research priorities.

Keywords: geothermal energy; hot dry rock; bibliometrics; EGS technology; sustainable development (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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