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Circular Economy in Energy Infrastructure

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "C: Energy Economics and Policy".

Deadline for manuscript submissions: closed (25 March 2026) | Viewed by 3113

Special Issue Editor


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Guest Editor
Department of Economic and Administrative Sciences, University of Quebec in Chicoutimi Alphonse-Desjardins Pavilion, Saguenay, QC G7H 2B1, Canada
Interests: sustainable development; environmental impact assessment; circular economy
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Special Issue Information

Dear Colleagues,

The economy can be conceived as transformed energy since every economic activity relies on energy for its enactment. Meanwhile, as the world grapples with the critical need for sustainable development, the energy sector is increasingly exploring the principles of a circular economy to reduce waste, optimize resource use, and lower carbon emissions.

This Special Issue seeks to gather cutting-edge research and thought leadership that will drive innovation and practical applications in the design, management, and operation of energy infrastructure.
Potential contributions can take many forms, including conceptualizations, review papers, research articles, critical perspectives, or case studies, either locally or globally. Most importantly, this Special Issue garners original research results to focus on, without being limited to, the following topics: 

  • Designing Circular Energy Systems
    • Innovative approaches in the design of energy infrastructure that integrate circular economy principles. Topics could include modular energy systems, energy-efficient technologies, and the use of renewable or recycled materials in energy infrastructure development.
  • Energy Storage and Circular Economy
    • Investigations into sustainable energy storage solutions, including reuse, recycling, and life-cycle management of energy storage technologies, such as batteries and hydrogen storage systems.
  • Resource Recovery in Energy Systems
    • Exploring methods for resource recovery, including the repurposing of materials, recycling energy-related products, and waste-to-energy initiatives in power generation, transmission, and distribution systems.
  • Lifecycle Assessment and Circular Business Models
    • Research on lifecycle assessment (LCA) in energy systems and the development of circular business models that prioritize longevity, reusability, and sharing in the energy sector
  • Digitalization and Smart Infrastructure
    • The role of digital technologies, such as the internet of things (IoT), artificial intelligence (AI), and blockchain, in optimizing circular energy systems and promoting resource efficiency.
  • Policy and Regulatory Frameworks
    • Analyses of the policy frameworks and regulatory mechanisms that support or hinder the adoption of circular economy principles in energy infrastructure. Papers on international and regional case studies are particularly encouraged.
  • Social and Economic Impacts
    • Assessing the socio-economic impacts of implementing circular economy strategies in energy systems. Topics include job creation, community involvement, and social equity in energy transitions.

Prof. Dr. Myriam Ertz
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • circular energy systems
  • resource recovery
  • sustainable energy storage
  • circular economy
  • resource efficiency
  • energy system optimization
  • circular energy policy
  • circular energy regulatory framework
  • circular energy consumption
  • lifecycle assessment of energy systems
  • circular energy business models
  • circular energy strategies
  • modular energy systems
  • social equity in energy
  • circular energy governance
  • energy-efficient technologies
  • renewable and recycled materials in energy

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Published Papers (2 papers)

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Research

27 pages, 4201 KB  
Article
Circular Economy and Energy Transition: Research Trends, Knowledge Structure, and Future Directions
by Sai-Leung Ng and Chih-Yuan Chen
Energies 2026, 19(3), 763; https://doi.org/10.3390/en19030763 - 1 Feb 2026
Cited by 1 | Viewed by 1262
Abstract
The circular economy offers effective strategies to support the transition from fossil fuels to renewable energy. However, research at the nexus of the circular economy and energy transition remains fragmented across disciplines and lacks a systematic and integrative overview of its intellectual structure [...] Read more.
The circular economy offers effective strategies to support the transition from fossil fuels to renewable energy. However, research at the nexus of the circular economy and energy transition remains fragmented across disciplines and lacks a systematic and integrative overview of its intellectual structure and thematic evolution. To address this gap, this study conducts a large-scale bibliometric analysis of 2977 journal articles published between 2008 and 2025 to examine the development, knowledge structure, and global distribution of this field. Performance analysis and scientific mapping are employed to evaluate research output, subject areas, thematic structures, intellectual foundations, journal dissemination, and international collaborations. The results indicate that the circular economy–energy transition nexus is a rapidly growing and multidisciplinary field. It is anchored by conceptual and policy-oriented works and complemented by applied studies on waste management, bioenergy, and decarbonization technologies that directly relate to energy production, conversion, and system efficiency. The geographical distribution shows a multi-pillar but uneven research landscape, with Europe and China emerging as leading contributors, while other regions remain comparatively underrepresented, shaped by regional priorities and collaborative networks. The study highlights emerging research gaps and future directions, offering insights into how circular economy strategies such as resource circularity and waste-to-energy applications can contribute to sustainable and equitable energy transitions and inform future energy-focused research agendas in the context of low-carbon transformation. Full article
(This article belongs to the Special Issue Circular Economy in Energy Infrastructure)
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31 pages, 1649 KB  
Article
The Energy and Environmental Impacts of Free-Floating Shared E-Scooters: A Multi-City Life Cycle Assessment
by Shouheng Sun, Jixin Zhang and Myriam Ertz
Energies 2025, 18(23), 6259; https://doi.org/10.3390/en18236259 - 28 Nov 2025
Cited by 2 | Viewed by 1018
Abstract
Free-floating shared e-scooters (FFSE) have been promoted as a sustainable urban mobility solution, yet their true energy and environmental impact remain contested. This study conducts an attributional life cycle assessment (aLCA) across 32 cities in Europe and North America to evaluate the fossil [...] Read more.
Free-floating shared e-scooters (FFSE) have been promoted as a sustainable urban mobility solution, yet their true energy and environmental impact remain contested. This study conducts an attributional life cycle assessment (aLCA) across 32 cities in Europe and North America to evaluate the fossil energy consumption and greenhouse gas (GHG) emissions of FFSE systems. By integrating real-world operational data—including vehicle lifespan, daily turnover rates, and city-specific modal substitution patterns—we quantify the direct and net environmental impacts under varying rebalancing and charging scenarios. Results indicate that FFSE systems do not inherently provide net energy and environmental benefits. Instead, achieving net reductions in greenhouse gas emissions and fossil energy consumption depends on systems operating beyond specific thresholds of service life and total travel distance. These thresholds vary dramatically across cities, influenced by modal substitution patterns and local operational efficiency (i.e., rebalancing intensity, daily turnover rates, and trip distance). Cities with high car displacement and efficient operations achieve net GHG and energy savings at lower life cycle mileages, whereas systems that replace walking or public transit often have negative impacts. Additionally, the distribution of energy and environmental impacts across the life cycle shifts fundamentally with vehicle longevity. When the travel distance exceeds 4000–5000 km, it transitions from being manufacturing-dominated to operation-dominated, with rebalancing and electricity use becoming the primary contributors. The research provides evidence-based guidance for policymakers and operators seeking to maximize the contribution of shared micromobility systems to energy conservation and emission reduction. Full article
(This article belongs to the Special Issue Circular Economy in Energy Infrastructure)
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