Advancing Sustainable Energy Solutions: Innovations in Clean Energy Applications and Conventional Energy Efficiency Upgrade

The transition to clean and low-carbon energy sources is an imperative driven by the urgent challenges of climate change, energy security, and environmental sustainability. As we face these challenges, it becomes essential to foster technologies and strategies that not only support sustainable growth but also align with environmental conservation. This editorial presents a curated collection of innovative research studies that contribute significantly to advancing our understanding and implementation of sustainable energy solutions.

Innovations in clean energy and its applications are pivotal for sustainable growth. The integration of solar energy with advanced materials is further exemplified by Hussain et al. [1], who introduce a novel architecture for detecting micro-cracks in photovoltaic cells, thereby enhancing the durability and efficiency of solar panels. Zhu et al. [2] investigate the performance enhancements of solar collectors in heating systems, offering insights that can optimize the use of solar thermal systems in industrial applications like crude oil heating. Spoof-Tuomi et al. [3] assess the real driving emissions of biogas-fueled buses, supporting the use of biogas as a clean alternative in public transport systems. Moreover, given the significant potential of natural gas hydrates (NGHs) as a clean alternative energy source, enhancing their production through effective reservoir stimulation is crucial. Ning et al. [4] provides a comprehensive overview of current and potential methods for enhancing the production of NGHs, focusing on weakly consolidated reservoirs.

Energy efficiency and storage methods not only contribute to our understanding of clean energy technologies but also provide practical approaches to reducing carbon emissions and enhancing energy efficiency. Energy efficiency is furthered through technological innovations that address both industrial needs and environmental concerns. Pokhriyal et al. [5] focus on the role of battery energy storage systems in stabilizing grid frequency, a key aspect in the integration of fluctuating renewable energy sources such as wind power. Energy conservation is another critical area of focus. Zhuang et al. [6] explore the application of rotary boosters in hybrid cooling units to improve the energy efficiency of the information technology industry, where energy-efficient cooling solutions are critical for sustainable operations.

In the realm of sustainable practical applications, Lin et al. [7,8] investigate the optimization of dual fluidized bed reactors for clean energy processes like biomass gasification, providing valuable data to enhance the efficiency and sustainability of industrial energy use. Jesus et al. [9] develop a computational tool to assist in selecting sustainable refrigerants, aligning with environmental regulations and reducing the ecological impact of refrigeration systems. Geng et al. [10] address methane emission detection stability, offering innovative optical designs that enhance the accuracy and reliability of environmental monitoring. Han et al. [11] research the thermal conductivity of nanoporous aerogels, aiming to improve insulation materials that are essential for energy conservation in buildings and industrial processes. The integration of renewable energy into power grids is crucial for maintaining energy reliability. Xing et al. [12] explore an environmentally friendly liquid–liquid extraction method for recovering volatile fatty acids (VFAs) from anaerobic acidification broth using ionic liquids (ILs) and cosolvents. This breakthrough could lead to more sustainable practices in the recovery of valuable compounds from organic waste, with potential applications in biofuel production and other industries. Chilver-Stainer et al. [13] delve into the optimization of gas flow channels in low-temperature Polymer Electrolyte Membrane Fuel Cells (PEMFCs), crucial for enhancing the power output of hydrogen-powered vehicles. Ai et al. [14] focus on improving the operational efficiency of shielding induction motors in nuclear applications, emphasizing the importance of accurate temperature management for safety and reliability.

Urban and industrial clean energy solutions reflect the integration of policy and technology. Effective policy instruments and regulations can significantly influence the adoption and success of clean energy technologies. Xiong and Sui [15] analyze the impact of carbon emissions trading policies on urban green resilience, highlighting the socio-economic benefits of these policies in fostering sustainable urban development. Seyedzahedi and Bahramara [16] evaluate the impact of policy instruments on solar investments in Iran, showing how specific incentives can boost the economic viability of solar energy. Furthermore, the role of bioenergy in a sustainable energy future is underscored by studies on biomass power. Xin-gang et al. [17] evaluate the influence of policy instruments on the adoption of biomass technologies, highlighting how strategic policy frameworks can accelerate technology uptake and efficiency. Wang et al. [18] assess various strategies for reducing carbon emissions in Guizhou Province, China, highlighting the necessity of integrated policies for sustainable development and carbon reduction. Zhuang and Pan [19] investigate the impact of clean power investment on regional, high-quality economic development in China, utilizing a spatial Durbin model to analyze panel data from thirty provinces from 2010 to 2019, offering valuable insights for policy-makers aiming to align economic growth with environmental sustainability goals.

Emerging challenges in clean energy require innovative solutions that also offer significant opportunities for technological advancement and environmental sustainability. Zhang et al. [20] propose a method for regenerating waste polyurethane into high-performance materials, contributing to waste management and resource efficiency. Djamari et al. [21] explore developments in diesel engine technology, focusing on the optimization of spray patterns to reduce emissions and improve fuel efficiency. Quach and Lim [22] explore the impact of propylene gas flames on metal plate emissions and temperature distribution during preheating. The study discovered that adjusting the equivalence ratio significantly affects emissions and temperature distribution. These studies contribute to optimizing industrial processes by enhancing our understanding of environmental and operational effects.

These studies not only reflect the broad spectrum of clean energy technologies but also highlight the necessity of interdisciplinary approaches that integrate engineering, economics, and policy-making to fully harness the potential of these innovations. The transition to clean and low-carbon energy is not merely a technological challenge; it is also a socio-economic and political journey that requires holistic strategies and collaborative efforts. It requires a comprehensive approach that considers the complex interplay between energy systems, environmental policies, market dynamics, and societal needs. Therefore, interdisciplinary research that bridges the gap between science, engineering, economics, and policy is crucial for developing effective solutions and strategies. In conclusion, the topic of “Clean and Low Carbon Energy” is at the forefront of addressing one of the most pressing issues of our time—climate change. The research in this area not only advances scientific knowledge and technological innovation but also shapes a sustainable and resilient energy future for generations to come.

As we venture further into this critical field, it becomes a shared obligation to ensure that the evolution towards cleaner energy models is inclusive, fair, and congruent with the overarching objectives of sustainable development. We extend our heartfelt gratitude to the authors, peer reviewers, and the editorial team whose invaluable contributions have enriched this publication. It is our sincere hope that the scholarly works contained within this issue will spark interest and serve as a catalyst for further research and innovation in the years ahead.