Guest Editors
Prof. Luis Hernández Callejo
Email: luis.hernandez.callejo@uva.es
Affiliation: Department of Agricultural and Forestry Engineering, Universidad de Valladolid, Soria, Spain
Homepage:
Research Interests: renewable energies, smart cities, microgrids, energy communities

Prof. Diego Rossit
Email: diego.rossit@uns.edu.ar
Affiliation: Departament of Engineering, INMABB, Universidad Nacional del Sur-CONICET, Bahía Blanca, Argentina
Homepage:
Research Interests: operations research, industrial engineering, production and logistics planning

Prof. Vanessa de Almeida Guimarães
Email: vanessa.guimaraes@coppead.ufrj.br
Affiliation: Operations, Technology and Logistics, COPPEAD-UFRJ, Cidade Universitária, Rio de Janeiro, Brazil
Homepage:
Research Interests: sustainable operations, planning and evaluation of sustainable performance in transport, mitigation policies and carbon regulation, smart and sustainable cities

Prof. Carlos Enrrique Torres Aguilar
Email: enrique.torres@ujat.mx
Affiliation: Department of Mechanical and Electrical Engineering, División Académica de Ingeniería y Arquitectura, Universidad Juárez Autónoma de Tabasco, Cunduacán, Mexico
Homepage:
Research Interests: energy efficiency and sustainability in the built environment, passive and hybrid renewable energy systems for buildings, solar chimneys and natural ventilation under diverse climatic conditions, thermal performance assessment using global energy balance models, computational fluid dynamics (CFD) applied to heat and mass transfer in buildings, advanced numerical methods for energy system analysis, data-driven modeling, regression analysis and machine learning, optimization, digital twins, and decision-support tools for low-carbon buildings and smart cities

Summary
Urbanization and community energy systems are central to achieving global decarbonization and sustainable development goals. Cities consume the majority of energy and are major contributors to greenhouse gas emissions, yet they also offer significant opportunities for innovation in renewable energy deployment and efficiency improvements across multiple scales. This Special Issue seeks high-quality contributions that address the design, integration, optimization, and real-world deployment of renewable energy technologies (e.g., solar, wind, bioenergy) and energy-efficient systems within urban and community environments. We encourage original research, case studies, reviews, and interdisciplinary work that explore: decentralized and community energy systems; energy-efficient building and district solutions; smart grids and energy management technologies; socio-technical and policy aspects of urban sustainability; multi-energy system modelling and optimization; and strategies to improve energy equity and resilience. This issue aims to bridge theoretical advances with practical solutions that support cleaner, more efficient energy systems for cities and communities, advancing the transition towards low-carbon, resilient, and inclusive energy futures — well within the broad engineering and sustainability focus of Energy Engineering.
The topics of interest for this special issue include, but are not limited to:
· Renewable energy systems
· Energy efficiency
· Sustainable cities
· Community energy systems
· Smart grids and microgrids
· Distributed generation
· Urban energy planning
· Low-carbon technologies
· Building energy performance
· Energy management systems
· Decentralized energy networks
· Urban sustainability
Keywords
clean energy transition, urban decarbonization, local energy communities, city-scale energy modelling, high-performance buildings, energy demand optimization, sustainable urban infrastructures, electrification of urban energy uses, carbon-neutral cities, sustainable mobility