Renewable Energy Sector Research Articles

Global trends in the investment policy of countries in agriculture in the context of transition towards renewable energy sources

Relevance. The renewable energy sector is attractive for foreign direct investment, among which projects related to the introduction of wind energy, as well as the reproduction of energy from biomass and biofuels are popular with investors. The proof of the popularity of such projects is the investment of 70% of all investments in renewable energy sources.The purpose The aim is to consider the trends of global investments in agriculture in the context of the transition to renewable energy sources.Objectives: to analyze the inflow of FDI to various regions of the world for the implementation of renewable energy transition projects; to show the reasons for the uneven investment of countries in different regions in modern conditions.Methodology. The structural theory is used to study investment flows, and the method of studying statistical reporting according to UNCTAD and CEPAL data is used for quantitative and qualitative analysis of attracted investments.Results. The statistical data used formed the basis for a quantitative and qualitative analysis of the directions of attracting FDI to various countries, showing the heterogeneity of this process by region. The global climate situation requires accelerating low-carbon innovation by all possible means. Developed countries have the same problems of transition to renewable energy as developing countries, so investment investments are relevant for agriculture in all regions of the world.Conclusions. Western countries prefer to be in the trend of the modern economy and invest in green sectors of the economy and those industries that use carbon-neutral technologies. Global changes in green energy financing related to the transfer of funds to the "hotbeds of conflict" in Ukraine and the Middle East have put some countries (LACs) in need of finding their own resources to continue energy transition projects.

Renewable energy policy performance and technological innovation in Africa: A Bayesian estimation

This paper examines the effect of renewable energy policy performance on innovation activity in the renewable energy sector in a sample of thirty-three African countries during the period 2010–2021. The policy performance we use covers carbon pricing, incentives for grid-connected and distributed renewable energy generation, fiscal incentives for renewable energy, legal framework for renewable energy, off-take risk, network connection and pricing, and policy design attributes. Using patent data and renewable policy performance to fit a Bayesian negative binomial, our results generally show that renewable energy policy in the region supports technological innovation in the sector. Policy initiatives focused on market-based incentives (auctions and tariffs), renewable portfolio standards, risk mitigation, network connection and pricing are largely responsible for a strong and statistically significant relationship between renewable energy policy and innovation activity. We also find evidence that intellectual property rights, renewable energy capacity, electricity prices, affordability of renewable energy, and openness to trade proxies are important drivers of innovation activity in the renewable energy sector. Our analysis finds no evidence that research and development is a significant determinant of renewable energy innovation in African countries. Our results serve to inform policymakers on the areas in which specific policy actions are most effective at promoting innovation in the renewable energy sector.

A comprehensive analysis of real options in solar photovoltaic projects: A cluster-based approach

Solar photovoltaic (PV) projects are pivotal in addressing climate change and fostering a sustainable energy future. However, the complex landscape of renewable energy investments, characterized by high upfront costs, market uncertainties, and evolving technologies, demands innovative evaluation methods. The Real Options Approach has emerged as a powerful tool, offering strategic flexibility in decision-making under uncertainty. This paper comprehensively analyzes the application of real options for evaluating solar photovoltaic projects in 2008–2023. Analysis of document descriptors (author keywords, index keywords, and noun phrases extracted from titles and abstracts) reveals that the dominant research topics in the last ten years (2014–2023) include investment optimization, strategic analysis, energy policy, optimization of energy generation and investments in wind energy. These descriptors are used to analyze the evolution of research interests on a two-year basis and reveal the yearly evolution of the research topics. Finally, the concept of emergence is used to unveil emerging research trends, providing valuable insights for researchers and practitioners in the renewable energy sector. Ultimately, this work contributes to a deeper understanding of how real options analysis empowers decision-makers to make informed choices in advancing clean and sustainable energy solutions.

Preliminary Numerical Modelling of a Dynamic Spring-Mounted Wing System to Reduce the Drag of Vehicles at Higher Speeds

The dynamic behaviour of a spring-mounted symmetrical NACA0012 wing in a freestream flow of air is studied in the pre-stall region, over 0° to 12° angles of incidence. The primary aim of this work is for use within the automotive sector to reduce drag and fuel emissions. However, this work will also be of interest in the motorsport sector to improve performance, and also have some applications within the aerospace and renewable energy sectors. The general operation of the concept has previously been verified at these low angles in the pre-stall region with that of a theoretical estimation using finite and infinite wings. This paper provides a numerical solution of the same problem and is compared with the previous experimentation. At these low angles, the computations yield a dynamic response settling into a static equilibrium. The stable solutions match the start of a steady regime well, when compared with the experiment. The trends are also comparable with the experiment, but the velocities at which they occur are underestimated in the computation. The computations demonstrate a drag reduction of 59% when compared to a fixed wing, whereas the lift remains stable at a near constant value with increasing wind speed. Thence, downforce is maintained whilst drag is reduced, which will facilitate higher speeds on the straight whilst maintaining vehicle direction stability. Limitations to this proof-of-concept work are highlighted and future development work is suggested to achieve even further increases in performance.

The impact of financial decentralization and investments in green power on the ecology in the European union: How does the governance of institutions moderate this relationship?

There has been a growing emphasis in recent scholarship on the environmentalist movement, necessitating robust data to substantiate claims regarding the impacts of financial decentralization and investments in green power on the ecology. This study investigates the multifaceted impact of these factors within a subset of EU member states from 2000 to 2020, with a particular focus on their implications for environmental sustainability. Employing an advanced-panel method, the investigation utilizes enhanced self-regressive distribution delays (CS-ARDL) to analyze the cumulative and immediate connections between financial decentralization, green power investments, and environmental outcomes. The study reveals that effective governance of institutions plays a crucial role in moderating this relationship, influencing the extent to which financial decentralization and green energy investments contribute to environmental preservation. Preliminary findings indicate that regions with decentralized financial systems and substantial investments in green power exhibit reduced carbon dioxide emissions and improved environmental quality. This positive impact is further amplified by sound institutional oversight, ensuring that investments in clean energy align with ecological sustainability goals.The study also underscores the importance of a coordinated approach, where financial decentralization, investments in green power, and institutional governance synergistically contribute to environmental resilience and sustainable development. These efforts not only mitigate environmental challenges but also stimulate economic growth, job creation, and technological innovation in the renewable energy sector. The impact of financial decentralization and investments in green power on environmental sustainability in the European Union is significant, with governance playing a pivotal role in shaping positive outcomes. This study provides valuable insights for policymakers and stakeholders seeking to promote a greener and more sustainable future within the EU.

Evaluation of the jet distortion by sediment erosion in the needle in the Pelton turbines

Abstract In order to succeed in the transition to a more renewable energy sector, the hydropower industry must overcome multiple challenges in the coming decades, including the need for faster and reversible turbines to support emerging renewable energy sources. In addition, the location of new projects in tropical and semi-tropical areas poses unique considerations, as does the increase in sediment. Evaluating sediment erosion in turbines is a critical challenge, which may partly be addressed by analyzing the behavior of water jets from eroded nozzles in Pelton turbines. This paper presents an evaluation of the quality of the jet under various hydraulic conditions, focusing on needle erosion. The study is part of a research project conducted in the Waterpower Laboratory at NTNU, focusing on Pelton turbines. Furthermore, this paper investigates erosion patterns caused by sediments on the needle and explores the impact on jet performance. Through high-speed visualization and image processing, the behavior of a jet from the needle tip to a representative distance downstream has been investigated. The investigation revealed discernible differences between jets with eroded and uneroded needles in size and edge variation.

Digitalization and productivity in the Chinese wind power industry: the serial mediating role of reconfiguration capability and technological innovation

PurposeWind power is the most promising renewable energy source in China. The development of digital technologies has brought about unprecedented growth opportunities and prospects for wind power. However, the relationship between digital technology adoption and total factor productivity (TFP) in the wind power industry in China has not been empirically assessed. This study aims to clarify whether and how digital technology adoption affects the TFP of the wind power industry in China.Design/methodology/approachBased on the data of listed companies in the Chinese wind power industry from 2006 to 2021, this study proposes and verifies relevant hypotheses with two-way fixed effects regression models.FindingsThe empirical results indicate that digital technology adoption is the cornerstone of the TFP of China’s wind power industry. Reconfiguration capability and technological innovation serially mediate the above relationship. In addition, the incentive effect of digital technology adoption varies among wind power firms. The impact of digital technology adoption is more significant in firms that are old and located in economically undeveloped regions.Originality/valueThis study is one of the earliest attempts to investigate the relationship between digital technology adoption and TFP in the renewable energy sectors of emerging economies. By integrating dynamic capability theory and the analytical framework of “Capability-Behavior-Performance” into the digital context, this study offers the theoretical insights into how digital technology adoption can enhance organizational reconfiguration capability, thereby stimulating technological innovation and subsequent TFP. Additionally, the impacts of different digital technologies are estimated in entirety, rather than in isolation.

Thinking big starting small: identifying considerations for small-scale tidal energy in southwest Nova Scotia

Nova Scotia’s marine renewable energy (MRE) sector can contribute to provincial goals for carbon neutrality. With this, tidal energy has been an interest to industry stakeholders for over two decades, yet general momentum for the industry has shifted. Previous tidal energy projects and recent studies suggest there needs to be a shift in focus towards scalable tidal energy (i.e., small-scale) development in the province. This research explores the considerations of developing tidal energy in Southwest Nova Scotia with an emphasis on small-scale tidal devices. Using a comprehensive literature review and in-depth semi-structured interviews with stakeholders from different sectors of Nova Scotia’s MRE energy industry, key issues and challenges were explored. Results underline four main themes that affect industry potential, which include cost and financing, technology, policy, and energy distribution. These results support a discussion around the value of small-scale technology, regulatory pathways, industry collaboration, and using global best practices to accelerate tidal energy industry goals in Nova Scotia.

Financing Management and Social Information

China's robust renewable energy sector expansion has spurred academic inquiry into the underlying driving forces. Recent studies have highlighted the correlation between the growth of renewable energy and project financing and the pivotal role of information management in financing. Based on this, we use business data from Chinese listed companies from 2007 to 2021 to investigate the relationship between renewable energy business development and financing. Furthermore, we introduce social and enterprise information to explore their impact on this relationship. Our findings reveal that: (1) Expansion of renewable energy businesses enhances fund availability mainly through endogenous financing. (2) “Anti-dumping and countervailing” (“Double-anti”) investigations significantly hinder financing for expanding renewable energy businesses, while industrial policies mitigate these effects. (3) Complex international backgrounds combined with domestic market-government interactions promote renewable energy enterprises to apply information management technology for financing.

Project management tools in renewable energy integration: A review of U.S. perspectives

The integration of renewable energy into the U.S. electricity grid is a multifaceted challenge that demands innovative project management approaches. This review article explores the current landscape of renewable energy integration in the United States, emphasizing the diversity of renewable sources such as solar, wind, hydropower, geothermal, and biomass. It examines the state of integration, highlighting significant progress and persistent challenges, particularly in grid stability, regional variations, and regulatory frameworks. Key stakeholders, including federal and state agencies, utilities, independent power producers, and advocacy organizations, play pivotal roles in shaping the renewable energy sector. The article delves into the critical importance of project management, outlining how effective coordination, risk mitigation, and performance optimization are essential for successful project execution. Various tools and techniques, including advanced analytics, agile methodologies, and stakeholder engagement strategies, are analyzed for their effectiveness in navigating the complexities of renewable energy projects. The review also addresses the emerging trends and innovations in project management, such as the adoption of artificial intelligence, machine learning, and sustainability-focused frameworks, which are poised to revolutionize the sector. It concludes with practical recommendations for project managers, emphasizing the need for flexibility, technological awareness, stakeholder collaboration, and data-driven decision-making to overcome challenges and drive the transition to a sustainable energy future. By providing a comprehensive overview and actionable insights, this article aims to equip project managers and stakeholders with the knowledge needed to successfully integrate renewable energy into the U.S. grid, thereby contributing to the nation's goal of a resilient and sustainable energy system. Keywords: Renewable Energy, Project Management, Grid Integration, Stakeholder Engagement, Sustainability, Technological Advancements, Energy Transition, Review.

Towards a Sustainable Blockchain: A Peer-to-Peer Federated Learning based Approach

In the rapidly evolving digital world, blockchain technology is becoming the foundation for numerous applications, ranging from financial services to supply chain management. As the usage of blockchain is becoming more prevalent, the energy-intensive nature of this technology has raised concerns about its long-term sustainability and environmental footprint. To address this challenge, we explore the potential of Peer-to-Peer Federated Learning (P2P-FL), a distributed machine learning approach that allows multiple nodes to collaborate without sharing raw data. We present a novel integration of P2P-FL with blockchain technology, aimed at enhancing the sustainability and efficiency of blockchain networks. The basic idea of our approach is the use of distributed learning mechanisms to find the optimal performance parameters of blockchain without relying on centralized control. These parameters are then used by a load-balancing mechanism that prioritizes energy efficiency to distribute loads on different blockchains. Furthermore, we formulate a non-cooperative game theory model to align the individual node strategies with the collective objective of energy optimization, ensuring a balance between self-interest and overall network performance. Our work is exemplified through a case study in the renewable energy sector, demonstrating the application of our model in creating an efficient marketplace for energy trading. The experimentation and results indicate a significant improvement in the execution times and energy consumption of blockchain networks. Therefore, the overall sustainability of the network is enhanced, making our framework practical and applicable in real-world scenarios.

Socioeconomic challenges and opportunities in renewable energy transition

The global transition to renewable energy is a multifaceted endeavor that entails profound socioeconomic transformations. This study aimed to explore the socioeconomic challenges and opportunities inherent in this transition. By leveraging a comprehensive review of existing literature and case studies, this research provides insights into the economic, social, technological, and policy dimensions of renewable energy adoption. The study employed a mixed-methods approach, combining qualitative analysis of policy frameworks with quantitative assessment of economic impacts. Key findings indicate that while renewable energy technologies, such as solar and wind, are increasingly cost-competitive, high initial capital costs and long payback periods remain significant barriers. Social and cultural resistance also poses challenges, particularly in communities with strong ties to traditional energy sources. Policy inconsistencies and regulatory uncertainties further complicate the adoption of renewable energy technologies. Conversely, the study highlights numerous opportunities. Renewable energy deployment can drive substantial job creation, stimulate local economies, and enhance energy security by diversifying energy sources. Technological advancements in energy storage and smart grids are crucial for integrating renewable energy into existing systems, thereby ensuring reliability and stability. Effective policy frameworks, such as feed-in tariffs and carbon pricing, are essential for fostering investment and innovation in the renewable energy sector. The study concludes that a holistic approach, integrating economic incentives, social engagement, and robust policy frameworks, is vital for overcoming challenges and maximizing the benefits of renewable energy. Recommendations for future research include exploring innovative financial instruments, advancing energy storage technologies, and enhancing public engagement to increase social acceptance of renewable energy projects. Keywords: Renewable Energy, Socioeconomic Challenges, Energy Policy, Technological Innovation, Energy Transition, Sustainable Development.

Adaptive Sliding-Mode Controller for a Zeta Converter to Provide High-Frequency Transients in Battery Applications

Hybrid energy storage systems significantly impact the renewable energy sector due to their role in enhancing grid stability and managing its variability. However, implementing these systems requires advanced control strategies to ensure correct operation. This paper presents an algorithm for designing the power and control stages of a hybrid energy storage system formed by a battery, a supercapacitor, and a bidirectional Zeta converter. The control stage involves an adaptive sliding-mode controller co-designed with the power circuit parameters. The design algorithm ensures battery protection against high-frequency transients that reduce lifespan, and provides compatibility with low-cost microcontrollers. Moreover, the continuous output current of the Zeta converter does not introduce current harmonics to the battery, the microgrid, or the load. The proposed solution is validated through an application example using PSIM electrical simulation software (version 2024.0), demonstrating superior performance in comparison with a classical cascade PI structure.

A flexible policy instrument to encourage externality abatement technologies in salmon aquaculture

Aquaculture has been identified as a food sector with potential to provide protein and essential micronutrients to a growing global population, with salmon aquaculture often viewed as a leader in innovation and adoption of new technologies. Despite a broad range of negative externalities in salmon aquaculture, sea lice infestations remain the most harmful of environmental issues within the industry. In response to these challenges and driven by the need for a higher degree of control over the production conditions, salmon producers in Norway have been investing in new technologies that are often perceived as the last resort for sea lice abatement. The challenge is to design a regulatory regime that encourages innovation toward a sustainable mix of production technologies in the future. In this paper, we propose to use feed-in tariffs (FITs), a dynamic Pigouvian subsidy, as a regulatory instrument that can promote investments in abatement technologies by the salmon farming industry. We ground our discussion of FITs for aquaculture in experiences from the renewable energy sector in Spain and Germany.

Renewable Energy Source Utilization Progress in South Africa: A Review

Renewable energy has emerged as a promising solution to address the challenges of climate change, energy security, and socio-economic development. South Africa, with its abundant renewable energy resources, has made significant strides in the utilization of renewable energy over the past decade. This paper provides a comprehensive review of the progress of renewable energy advancement in South Africa, examining the policies, initiatives, and achievements in various renewable energy sectors. This study explores the country’s transition from a heavily coal-dependent energy system to a diversified and sustainable energy mix. It analyses the growth of renewable energy technologies, such as wind power and solar photovoltaic (PV), highlighting the key milestones, challenges, and opportunities. Furthermore, this paper discusses the role of government support, regulatory frameworks, and private sector investments in driving renewable energy deployment in South Africa. Finally, it identifies the prospects and potential areas for further advancement in the renewable energy sector. This review aims to contribute to the understanding of South Africa’s renewable energy journey and provides valuable insights for policy-makers, researchers, and stakeholders involved in the sustainable energy transition.

Green Bonds as A New Investment Tool For Sustainable Development In India

The present paper conceptualizes the meaning, need and importance of green bonds as an initiative towards investment tool and sustainable development in India. A green bond is a type of investment that provides financial support for particular projects related to sustainability issue of climate change and control. Indian Companies have incorporated investment in green bonds as a part of climate finance strategy. The ICMA issued principles of green bonds investment and voluntary process guidelines for issuing green bonds in 2021. The four principles are: use of proceeds, process for project evaluation and selection, management of proceeds and reporting. The SEBI has issued several rules for green bonds securities in India including disclosure requirements, monitoring and third-party review. The private bank of India i.e. Yes bank was the first issuer of green bonds in India in the year 2015. Indian green bond issuance has grasped a total of $21 billion as on February 2023. The scenario of green bond market in India for the year 2021 shows that the Utilities sector has more share of green bonds followed by corporates, Renewable Energy sector and Financials. The least share is with local government in India.

Utilization of non-concentrated banana pseudostem sap waste for converting to bioethanol: In vitro and in silico evidence

The abundantly available waste banana pseudostem fibers have attracted the paper and textile industries, however the stem-sap extracted during fiber processing remains underutilized. Although this sap comprising cellulosic sugars holds potential as a feedstock, its commercial viability in the renewable energy sector remains a challenge. Our study delves into this untapped resource by mechanically extracting sap from banana pseudostems and enhancing its reducing sugar content to approximately 35.5 g/L through acid hydrolysis and detoxification without concentrating the sap. Using separate batch fermentations with pentose and hexose fermenting strains such as Pichia stipitis NCIM 3499 and Saccharomyces cerevisiae ATCC 2601, we achieved bioethanol production efficiencies of 67.5 % and 70.03 %, respectively. Yield and cost analyses confirmed the feasibility of this approach for industrial application in low-economy settings. Furthermore, gene-interaction network and functional enrichment analysis identified 63 key genes involved in carbohydrate metabolism and ethanol conversion pathways within the fermenting organisms. Among these, the PGK1 gene and its direct interactors emerged as promising targets for future biotechnological enhancements aimed at boosting bioethanol production. This study not only underscores the renewable energy potential of unconcentrated banana pseudostem sap but also paves the way for innovative genetic interventions to optimize bioethanol yields.

Studies on the development and performance of natural dye-sensitised solar cell

ABSTRACT Dye-sensitised solar cells (DSSCs) have gained popularity as a cost-effective alternative to silicon-based solar cells. The present study, provides a unique approach for the construction of DSSCs using anatase titanium dioxide (TiO2) as the photoelectrode material and natural fruit extracts (blackcurrent and pomegranate) as photosensitisers. To generate a compact and homogenous TiO2 anatase layer, nanoparticles are deposited onto a transparent conducting fluorine-doped tin oxide glass. Subsequently, natural fruit extracts were added to the TiO2 anatase film, functioning as photosensitisers to absorb sunlight and start the electron transfer process. Each fruit extract unique chemical makeup adds to the absorption of various wavelengths, widening the DSSC's light absorption spectrum. A thin graphite coating was applied to a conducting material for the generation of a counter electrode, which completes the DSSC structure. The sensitised TiO2 anatase layer and counter electrode are joined together, with a redox electrolyte filling the gap between them. Current–voltage measurements used to characterise the manufactured DSSC during simulated solar irradiation. The DSSC's efficiency was calculated as 0.4–18% based on the produced photocurrent and incident light intensity. The study’s finding shows that a DSSC can be successfully fabricated because of its low manufacturing cost and low harmful. It has wide applicability in renewable energy sectors.

The blockchain in the renewable energy sector: a tool for sustainability promotion

Energy transition and companies’ commitment to sustainability can be supported by integrating innovative technologies into the renewable energy (RE) sector. Blockchain technology (BT) represents one such technology. This paper explores how BT can support RE consumption as an answer to energy sector companies’ technological, transparency and traceability needs. We conducted a literature review on blockchain’s ability to adapt to the energy sector, focusing on RE applications. In addition, we qualitatively analysed two projects pursued by energy sector companies in Europe. Although there is an abundance of research on the application of BT in the energy sector, there are only a few operational studies on this theme. Therefore, we combined the theoretical analysis with an exploration of the practical application of BT in two actual developments that highlight its positive implications for the transition to RE. BT applications for RE are at an early stage and require time for development. The analysis invites interactions among academics, energy sector operators and legislators. The findings contribute to facilitate the RE adoption and greenhouse gas emissions reduction in compliance with 2030 and 2050 goals.

Risk and Systems Analysis for Renewable Power Generation with Environmental and Other Stressors

AbstractThe effects of climate change and water scarcity threaten the stability of critical infrastructure systems in developing regions. In particular, the interconnectedness of energy systems, natural resources, economic growth, and social welfare requires a systems‐level framework to identify scenarios which most impact these systems. This paper evaluates and quantifies infrastructure system risk, defined as the influence of scenarios on system priorities. A scenario‐based multi‐criteria preferences model assesses system component priorities for a baseline scenario as well as climate and related scenarios. The shift in priorities between the baseline and other future scenarios define scenario disruptiveness, or level of risk. The methods are demonstrated for the case of the emerging renewable energy sector of Iraq. Twenty‐five renewable energy system assets are prioritized by an assessment of system success criteria, which include economic, social, political, and climate considerations. The system prioritization is reevaluated in the case of seven disruptive scenarios relating to water scarcity, climate volatility, and social and economic shifts. This paper advances methods of the Systems Engineering Body of Knowledge (SEBoK) Part 3: Engineering and Management, by defining system risk and proposing methods for risk identification and risk analysis.