Photovoltaic Industry Research Articles

A fuzzy approach to environmental scanning (ES) of multi-factor bottlenecks to renewable rural energy sustainability in Nepal

ABSTRACT Due to the prevalence of traditional fuels and the increasing awareness of their negative effects on sustainability, policymakers and government authorities in Nepal have been compelled to transition towards promoting the adoption of clean energy. Nevertheless, as a result of numerous obstacles, the rate of renewable energy utilization has remained sluggish. Therefore, the country’s policymakers must become acquainted with the factors that impede the progress of renewable energy. The objective is to pinpoint the constraints, restrictions, and barriers that hinder the advancement of renewable energy access to rural communities in Nepal. The current study used the Delphi Technique of Environmental Scanning to identify the barriers impeding the adoption of renewable energy. In addition, an Exploratory Factor Analysis (EFA) was performed to redefine categories of bottlenecks depending on the direction of the factors in the context of Nepal. Ultimately, the Fuzzy Analytical Hierarchical Process (FAHP) has been employed to determine the priority of distinct bottlenecks of clean energy development. The study suggests that Nepal’s advancement in sustainable energy is hindered by financial obstacles, primarily due to the significant initial investment, which accounts for 19% of the challenges, and the lack of effective fiscal incentives provided by the government to developers and users, which accounts for 10.6% of the challenges. The research identified many contributory reasons, including the function of regulatory organizations (6.4%), inadequate political commitments (6%), inefficient existing energy policy (5%), and poor public knowledge (5%). To promote the development of sustainable energy sources in rural areas, it is crucial to implement economic incentives, provide financial support, establish partnerships between the public and private sectors, and utilize innovative financing methods such as green bonds, crowdfunding, and carbon financing. Additionally, it is necessary to increase political commitments to amend existing renewable energy policies in the country.

Analytical Formulation and Optimization of the Initial Morphology of Double-Layer Cable Truss Flexible Photovoltaic Supports

With the rapid development of the photovoltaic industry, flexible photovoltaic supports are increasingly widely used. Parameters such as the deflection, span, and cross-sectional dimensions of cables are important factors affecting their mechanical and economic performance. Therefore, in order to reduce steel consumption and cost and improve application value, it is crucial to design and optimize their initial morphology. In this paper, the mechanical behavior of a single-cable structure is introduced, and the simplified analytical formulations for internal force and displacement are deduced based on the geometric nonlinear characteristics and small strain assumption of the flexible photovoltaic supports. On this basis, the analytical expressions for the cable force and displacement of a convex prestressed double-layer cable truss flexible photovoltaic support structure under a uniform load are derived, and the correctness of the analytical formulations is verified by comparing the values with the finite element analysis results. In order to reduce the construction costs of the flexible photovoltaic support, a mathematical model for optimizing the initial structure’s morphology is established according to the analytical formulations. The initial morphology of the double-layer cable truss flexible photovoltaic support is optimized, and the optimization results of different deflection deformation limits and whether the lower load-bearing cable is allowed to relax are compared. The results indicate that the errors of the displacement formulation and cable force formulation, when compared with the finite element results, are less than 3% and 4%, respectively, which verifies the accuracy of the analytical formulations. By analyzing the cable force and displacement of the structure under static action, it is suggested that the deflection limit of the double-layer cable truss structure should be 1/100 of the single span. The lower load-bearing cables of the double-layer cable truss flexible photovoltaic support are highly susceptible to relaxation under wind suction loads, and, by comparing the optimization results, it is suggested that slack should be allowed in the lower load-bearing cables for a better economic effect. When choosing the most economical structure morphology, it is recommended that the total height of the mid-span struts should be 1/20~1/15 of the single span. The analytical formulation and the mathematical model for the optimization of the initial morphology proposed in this paper can provide certain theoretical references and bases for the design of practical engineering projects and play an important role in promoting its application and promotion.

Mechanistic insights into ethylene catalytic combustion and CO2 formation in vinyl acetate synthesis

Vinyl acetate is a crucial monomer for the production of polyvinyl alcohol and polyvinyl acetate, with extensive applications in the photovoltaic and pharmaceutical industries. CO2 is the primary by-product in the synthesis of vinyl acetate, significantly burdening the separation process and impacting the ecological environment. Reducing CO2 generation at the source is an effective solution. In the vinyl acetate synthesis process, CO2 is primarily produced through the catalytic combustion of ethylene. However, the reaction mechanism of ethylene catalytic combustion on Pd-based catalysts in vinyl acetate synthesis remains incomplete, with existing mechanisms presenting certain limitations. Therefore, further investigation into the reaction mechanism of ethylene catalytic combustion leading to CO2 formation on Pd-based catalysts is necessary.This study employs density functional theory to calculate the reaction mechanism of ethylene catalytic combustion on the Pd(100) surface, obtaining elementary reaction kinetics data. Based on these data, the kinetic Monte Carlo method was used to investigate the reaction process of ethylene catalytic combustion, revealing the predominant pathway for CO2 formation. This research provides targeted strategies for catalyst modification. It aims to improve the understanding of the reaction mechanism of ethylene catalytic combustion in vinyl acetate synthesis, reduce the consumption of ethylene in by-product formation, enhance vinyl acetate yield and ethylene utilization, and ultimately decrease CO2 production, thereby lowering carbon emissions.

Adaptation of the anammox process for high ammonium photovoltaic wastewater treatment

Tunnel Oxide Passivating Contacts (TOPcon) battery in the photovoltaic industry generates high ammonium wastewater during the production process, the adaptability of using the anaerobic ammonia oxidation (Anammox) process for photovoltaic wastewater (PVW) treatment is a research hotspot. Based on the analysis of photovoltaic wastewater quality, the effectiveness of nitrogen removal, sludge characteristics and microbial communities were examined. The results showed that when the influent NH4+-N concentration of PVW was lower than 150 mg·L−1, the nitrogen removal efficiency (NRE) was almost 100 %. In addition, the NRE decreased from 74 % sharply to 20 % when the NH4+-N concentration was increased from 175 mg·L−1 to 200 mg·L−1. The extracellular polymeric substances (EPS) content increased with elevated ammonium concentration in the influent, indicating that microorganisms secreted more EPS to resist elevated nitrogen loading. The main functional populations were Candidatus Kuenenia (0–24 %). The influent ammonium concentration is recommended to be < 200 mg·L−1.

Global carbon neutrality and China's contribution: The impact of international carbon market policies on China's photovoltaic product exports

China's photovoltaic (PV) product exports satisfy the renewable energy demand for international carbon market construction, contributing to the global carbon neutralization process with China's power. Based on the panel data of PV trade from 2000 to 2020, this paper empirically investigates the impact of global carbon market policies on China's PV product exports and its potential impact mechanism using a multi-period DID model. The study results show that (1) International carbon market policies significantly promote the export of Chinese PV products. (2) Mechanism analysis shows that two essential transmission channels are increased demand for renewable energy and reduced consumption of traditional fossil energy in carbon market countries. (3) Carbon market maturity strengthens the positive effect of the international carbon market on China's PV product exports. (4) Further research finds that international carbon market policies affect China's PV exports more pronounced in high-income, trade-friendly, and high-technology countries. The results of this paper reveal the vital contribution of China's PV industry in promoting global climate governance and environmental protection and provide some insights into how to promote and improve the shared prosperity and sharing of the renewable energy industry in the context of global carbon neutrality.

Study on sodium-ion anode material - Graphene battery

Batteries are the most common form of energy storage. Sodium-ion batteries are gradually replacing traditional lithium-ion batteries, becoming a key factor restricting their safety, service life, energy density and capacity. With the continuous consumption of energy by human society, the increasing scarcity of mineral resources, and the increasingly severe environmental problems. It is an urgent task to seek new, renewable and clean energy. Sodium-ion battery is expected to be a new type of charge/discharge device because of its high energy conversion efficiency, high energy density, long cycle life, environmental friendliness and good economy. The development of new green and high-efficiency large-capacity energy storage technology is great significance for promoting China’s green and low-carbon energy development. It is great significance for the implementation of China’s “double carbon” strategy. Sodium-ion battery is the most important class of secondary batteries. Sodium-ion battery has high rate, good low temperature resistance, suitable for low salt concentration electrolyte, high safety and other characteristics. The sodium is abundant in the earth, low price, low REDOX potential. That is a class of secondary batteries with great application prospects. With the progress of society and the sustainable development of economy, people’s demand for sodium-ion batteries is also increasing. The “14th Five-Year Plan” New Energy Storage Development Implementation Plan clearly points out that is necessary to carry out the test and demonstration of a new generation of high energy density storage technology represented by sodium-ion batteries.

Constructing Si@CN@MXene from silicon waste as high-performance lithium-ion battery anodes

Silicon represents one of the most attractive materials for anodes in lithium-ion batteries (LIBs) due to highest theoretical specific capacity. Thus, there is a most urgent need to prepare Si-based nano materials in a very efficient way, and develop some reasonable approaches for their modification in order to resolve the short-falls of Si anode, which include both low conductivity and huge volume changes during intercalation of lithium ions. In this work, the kerf loss silicon (KL Si) from the photovoltaic industry has been used as an inexpensive Si source for the synthesis of the Si@CN@MXene (SCM) composite to be applied as an anode material. Meanwhile, the chitosan works as the charge bridge in sequence with the Si and MXene nanosheets under electrostatic force during composite preparation. The MXene nanosheet and N-doped carbon layer that build up during chitosan calcination can be attributed to forming a hierarchical high-speed conductive network over the surface of silicon, which contributed to alleviate the volume expansion of silicon. The SCM electrode discharge capacity was obtained at a stable value of 900.8 mAh g−1 at 0.5 A g−1, 861.9 mA g−1 at 1 A g−1 and 657.6 mA g−1 even at 2 A g−1 after 100 cycles. The SCM electrode also exhibited good rate performance from 0.2 to 5 A g−1. Therefore, this study recommends that the method is very promising for producing the silicon anode material for LIBs from KL Si.

Carbon Superstructure‐Supported Half‐Metallic V2O3 Nanospheres for High‐Efficiency Photorechargeable Zinc Ion Batteries

AbstractPhotorechargeable zinc ion batteries (PZIBs), which can directly harvest and store solar energy, are promising technologies for the development of a renewable energy society. However, the incompatibility requirement between narrow band gap and wide coverage has raised severe challenges for high‐efficiency dual‐functional photocathodes. Herein, half‐metallic vanadium (III) oxide (V2O3) was first reported as a dual‐functional photocathode for PZIBs. Theoretical and experimental results revealed its unique photoelectrical and zinc ion storage properties for capturing and storing solar energy. To this end, a synergistic protective etching strategy was developed to construct carbon superstructure‐supported V2O3 nanospheres (V2O3@CSs). The half‐metallic characteristics of V2O3, combined with the three‐dimensional superstructure assembled by ultrathin carbon nanosheets, established rapid charge transfer networks and robust framework for efficient and stable solar‐energy storage. Consequently, the V2O3@CSs photocathode delivered record zinc ion storage properties, including a photo‐assisted discharge capacities of 463 mA ⋅ h ⋅ g−1 at 2.0 A ⋅ g−1 and long‐term cycling stability over 3000 cycles. Notably, the PZIBs assembled using V2O3@CSs photocathodes could be photorecharged without an external circuit, exhibiting a high photo conversion efficiency (0.354 %) and photorecharge voltage (1.0 V). This study offered a promising direction for the direct capture and storage of solar energy.

Carbon Superstructure-Supported Half-Metallic V2O3 Nanospheres for High-Efficiency Photorechargeable Zinc Ion Batteries.

Photorechargeable zinc ion batteries (PZIBs), which can directly harvest and store solar energy, are promising technologies for the development of a renewable energy society. However, the incompatibility requirement between narrow band gap and wide coverage has raised severe challenges for high-efficiency dual-functional photocathodes. Herein, half-metallic vanadium (III) oxide (V2O3) was first reported as a dual-functional photocathode for PZIBs. Theoretical and experimental results revealed its unique photoelectrical and zinc ion storage properties for capturing and storing solar energy. To this end, a synergistic protective etching strategy was developed to construct carbon superstructure-supported V2O3 nanospheres (V2O3@CSs). The half-metallic characteristics of V2O3, combined with the three-dimensional superstructure assembled by ultrathin carbon nanosheets, established rapid charge transfer networks and robust framework for efficient and stable solar-energy storage. Consequently, the V2O3@CSs photocathode delivered record zinc ion storage properties, including a photo-assisted discharge capacities of 463 mA ⋅ h ⋅ g-1 at 2.0 A ⋅ g-1 and long-term cycling stability over 3000 cycles. Notably, the PZIBs assembled using V2O3@CSs photocathodes could be photorecharged without an external circuit, exhibiting a high photo conversion efficiency (0.354 %) and photorecharge voltage (1.0 V). This study offered a promising direction for the direct capture and storage of solar energy.

Approaching 20% Efficiency in Ortho-Xylene Processed Organic Solar Cells by a Benzo[a]phenazine-Core-Based 3D Network Acceptor with Large Electronic Coupling and Long Exciton Diffusion Length.

High-performance organic solar cells often rely on halogen-containing solvents, which restrict the photovoltaic industry. Therefore, it is imperative to develop efficient organic photovoltaic materials compatible with halogen-free solvents. Herein, a series of benzo[a]phenazine (BP)-core-based small-molecule acceptors (SMAs) achieved through an isomerization chlorination strategy is presented, comprising unchlorinated NA1, 10-chlorine substituted NA2, 8-chlorine substituted NA3, and 7-chlorine substituted NA4. Theoretical simulations highlight NA3's superior orbit overlap length and tight molecular packing, attributed to interactions between the end group and BP unit. Furthermore, NA3 demonstrates dense 3D network structures and a record electronic coupling of 104.5 meV. These characteristics empower the ortho-xylene (o-XY) processed PM6:NA3 device with superior power conversion efficiency (PCE) of 18.94%, surpassing PM6:NA1 (15.34%), PM6:NA2 (7.18%), and PM6:NA4 (16.02%). Notably, the significantly lower PCE in the PM6:NA2 device is attributed to excessive self-aggregation characteristics of NA2 in o-XY. Importantly, the incorporation of D18-Cl into the PM6:NA3 binary blend enhances crystallographic ordering and increases the exciton diffusion length of the donor phase, resulting in a ternary device efficiency of 19.75% (certified as 19.39%). These findings underscore the significance of incorporating new electron-deficient units in the design of efficient SMAs tailored for environmentally benign solvent processing of OSCs.

Determinants of the development of photovoltaics in Poland

The photovoltaic (PV) industry is a rapidly growing sector of the Polish economy. The motivation for this study is the lack of detailed research on the impact of external factors on PV development in Poland. Therefore, we consider the different interests of various participants in the industry, encompassing installers; engineering, procurement and construction; designers; distributors; and manufacturers. The main objective of the study is to identify and analyse the legal, economic, environmental, technical and social factors that influence the development of PV in Poland and their determinants, considering the specific needs of different market stakeholders. The research is based on analysing the literature, publicly available reports and websites to complement the findings from in-depth interviews and surveys conducted among key PV market participants. Computational methods are employed, including Bartlett's sphericity tests, and the adequacy of the correlation matrix is evaluated using the Kaiser–Mayer–Olkin coefficient. The research results identify the main determinants of PV industry development in Poland, which include the lack of connection capacity, the cost of non-RESs and hourly pricing in the prosumer billing system. The study also determines the different perspectives between market stakeholders, finding that social factors have little impact on PV industry development. The main conclusion of the study is that the identified barriers must be addressed and removed to ensure the stable development of PV in Poland.

Homogeneous HER electrocatalysis using monothiolate ligand-based {FeS} complexes: A review

Renewable energy sources are considered as efficient, low cost and sustainable energy systems with the capability of achieving a decarbonized world. Of particular interest has been the use of hydrogen as an affordable and clean energy for achieving a sustainable (renewable) energy economy. The hydrogenases discovered almost 90 years ago and found in green algae and anaerobic bacteria, are known to be highly efficient biological catalysts for hydrogen evolution in nature. Out of the three types of hydrogenases ([FeFe], [NiFe] and [Fe] only) the [FeFe] hydrogenases have drawn particular attention due to their higher activity/efficiency and their ability to reversibly reduce protons to dihydrogen. Several models of the [FeFe] hydrogenase enzymes have been reported over the last three decades. This review article mainly describes in details the characteristics of mono- and di-nuclear {FeS} complexes with monothiolates (-SR) as the bridging ligands that have been reported as electrocatalysts for the hydrogen evolution reaction (HER).

A sustainable mineral process for silicon and quartz recovery from quartz crucible waste ash via electrical separation

Driven by the explosive development of the photovoltaic (PV) industry, the treatment of the quartz crucible waste ash (QCWA) from monocrystalline silicon rod production must be considered to combat the shortage of silicon materials and promote sustainable development. In particular, the loss of grade 4 N high-purity silicon in QCWA is a frustrating fact for the silicon supply chain. In this work, an electrical separation process is proposed for the recovery of silicon and quartz from QCWA to realize waste resource reutilization. The charging processes and forces in the feed QCWA are first analyzed. Then, the electric field distribution during electrical separation is simulated to clarify the movement models of silicon and quartz particles and formulate reasonable electrical separation parameters. After systematic theoretical analysis, calculation, and simulation, electrical separation experiments were conducted. The results prove that the content of silicon in the concentrate and the corresponding content of quartz in the tailing respectively exceeded 93 % and 61 % under a particle size of 80 ∼ 120 mesh, a voltage of 40 kV, and a roll speed of 75 r/min. This work demonstrates that electrical separation is a sustainable process that could be recommended for silicon and quartz recovery from QCWA.

How does the supply chain market respond to policy shocks? Evidence from solar photovoltaic sectors in China

Solar photovoltaic (PV) power policy implementation represents a pivotal strategy in addressing the challenges posed by global warming and climate change. This research endeavors to assess the effects of such policies on stock returns within the solar PV industry chain spanning the years 2013–2023. Employing contagion tests alongside the network analysis, our study delves into the intricate dynamics of policy impact. Our findings underscore the notably stronger influence exerted by opinion-based policies on policy contagion within industry chain sectors, eclipsing that of notification-based policies. Moreover, policies directed towards downstream sectors demonstrate a more pronounced effect on the mid- and downstream segments, relative to their impact on upstream components. Among the nine policies scrutinized, the 2017 notice pertaining to feed-in tariffs emerges as the most influential, driving and receiving policy shocks within the solar PV network system, while the 2022 notice aimed at coordinating the development of the PV industry supply chain exhibits comparatively weaker pervasive impact.

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.

Diamond wire saw forming cutting simulation analysis of arc workpieces

Abstract The application of diamond wire saws in the field of cutting hard and brittle materials is becoming increasingly widespread, especially in the photovoltaic industry where the demand for slicing processes for monocrystalline and polycrystalline silicon is continuously growing. Among these, the craftsmanship involved in arc-shaped workpieces is particularly complex. To analyze the impact of diamond wire saw processes on arc-shaped workpieces, PFC discrete element simulation software was utilized, aiming to produce a 1/8 arc segment, and the influence of the wire saw’s linear speed on the process was analyzed. The simulation results indicate that an increase in linear speed leads to improved particle distribution and a shape more closely resembling a circular form. However, the cutting process with a diamond wire saw must be controlled at an appropriate operating speed. If the speed is too high, it may lead to the destruction of the workpiece.

Transient response of a megawatt-scale solar photovoltaic in an electric distribution utility

There is an increasing trend among customers of an electrical distribution utility to adopt grid-tied solar photovoltaic systems. This shift offers multiple benefits to consumers, including lower monthly electricity bills and a contribution to the development of green energy. For the electrical distribution utility, various impacts may arise due to varying levels of solar energy penetration. This study investigates the effects of integrating varying levels of solar photovoltaic penetration into the commercial consumer network of Cagayan de Oro Electric Power and Light Company (CEPALCO) in the Philippines. Utilizing PowerWorld simulator, the research evaluates 11 different scenarios with solar penetration levels adjusted according to the percentage of load demand. Key findings include alterations in solar megavolt ampere of reactive power output, bus voltage levels, transformer power loading, and transmission line ampacity, with frequency levels remaining stable across scenarios. The optimal solar penetration level was identified at 70%, balancing the benefits of solar energy integration with the need to maintain grid stability and operational limits. This optimal level ensures the effective utilization of renewable energy sources without compromising the performance of CEPALCO’s electrical infrastructure. The research concludes with recommendations for maintaining grid stability and operational limits at the optimal solar penetration limits.

Upcycling of waste photovoltaic silicon: Co-MOF derived coating layer enhanced lithium storage

Large amounts of silicon waste (W-Si) powders or ingots from the photovoltaic (PV) industry can be recycled as the improved raw negative electrode material in Lithium-ion batteries. Herein, Co-MOFs (ZIF-67) is produced in the form of small particles which turns into the uniform coating layer on the surface of micro-sized W-Si by solvent evaporation, and then ZIF-67 is carbonized to form nitrogen-doped carbon (NC) layer and carbon nanotubes (CNTs). Finally, W-Si/NC/Co/CNTs composites are formed. The continuous and uniform NC layer and CNTs formed by the catalyzation of Co on the surface of the silicon particles can inhibit the volume expansion of silicon during the charge and discharge process, showing the reversible discharge capacity of 1039 mAh g−1 after 100 cycles. The rate performance is also improved due to the high conductivity composite structure. This work can provide a choice for the composite of MOF and micro-silicon, and the meaning guidance for the application of silicon waste from PV industry.

RENEWABLE ENERGY DEVELOPMENT TOWARDS SUSTAINABLE DEVELOPMENT GOALS: A REVIEW IN THAILAND AND THE PHILIPPINES’ LAWS AND POLICIES

Background and Purpose: Renewable energy (RE) plays a significant role in providing sustainable and clean energy as well as mitigating climate change. With the increased energy demand to support the growth of the economic sector, Thailand and the Philippines have moved towards improved energy cooperation, where renewable energy is an important subject matter in line with Target 7 of the Sustainable Development Goals (SDGs). Thailand and the Philippines have embarked on renewable energy projects and introduced numerous laws and policies to incentivise such an agenda. Nevertheless, the contribution of renewable energy in these countries' energy portfolios remains insignificant. Thus, this study aims to examine the current renewable energy laws and policies in Thailand and the Philippines, in assisting these countries to achieve the SDGs. Methodology: This study used a library-research methodology including statutory and conceptual approaches that focus on the laws and policies on renewable energy in Thailand and the Philippines. The utility of conceptual analysis is to understand the concepts and relevance of renewable energy and SDGs in the philosophies of environment, sustainability and law. Findings: Despite the fact RE provides opportunities in respect to socioeconomic development, energy access, energy security, and climate change mitigation, the existence of barriers to RE development leads to obstacles in accelerating RE’s share in the energy mix in Thailand and the Philippines. Comprehensive laws and policies to support renewable energy development are required to address these challenges. Nevertheless, legal frameworks are only one aspect that contributes to RE development. Governments' support through various incentives including financial and economic instruments are critical to navigating the transition toward a cleaner and affordable energy sector. Contributions: This study enhances the body of knowledge by examining the initiative for renewable energy development, advocating for comprehensive legal frameworks, and emphasizing the societal importance of government support to drive RE's role in sustainable development in Thailand and the Philippines. Keywords: Renewable energy, legal framework, policy, Thailand, Philippines. Cite as: Ghazali, F., Abdul Shukor, S. F., &amp; Karim, R. (2024). Renewable energy development towards sustainable development goals: A review in Thailand and the Philippines’ laws and policies. Journal of Nusantara Studies, 9(2), 1-33. http://dx.doi.org/10.24200/jonus.vol9iss2pp1-33

Renewable Energy Sources in The Context of Emissions Reduction: Geographical Aspects And Challenges for Sustainable Development

Purpose: The study aims to provide a nuanced understanding of renewable energy sources' geographical aspects and challenges in reducing emissions and promoting sustainable development. Design/Methodology/Approach: This study adopts a qualitative approach to investigate renewable energy sources in the context of emissions reduction, focusing on geographical aspects and challenges for sustainable development. The methodology is designed to gain in-depth insights and understand the complexities of deploying and utilising renewable energy across different geographical regions. Case studies provide detailed, context-specific insights into the practical implementation and challenges of renewable energy projects. The selection of case studies follows a purposive sampling method to ensure diversity in geographical settings, types of renewable energy, and stages of development. Reviewing project reports, policy documents, and environmental assessments related to each case study. The data was analysed by cross-verifying information from different data sources to enhance the reliability and validity of the findings. Research Limitation/Implications: It justifies the immediate construction of a “green economy” in Ukraine, drawing on theory and the experience of advanced countries. Findings: The diversity of renewable energy sources, geographical influences, technological advancements, policy and regulatory frameworks, and socio-economic impacts influenced their efforts to reduce emissions. Social Implication: The modern global economy faces significant challenges such as energy security, sustainable development of society, and climate change. Practical Implication: The paper identifies directions and outlines paths and mechanisms for accelerated development. Indeed, such a powerful carbon dioxide and methane emissions surge has never been observed. Originality/ Value: Recently, the most pressing issue is the “carbon footprint”, which refers to the total amount of carbon dioxide and methane emissions released into the environment due to human industrial activity. Measures to combat it will soon focus on modernising technologies to facilitate the transition to the sixth technological paradigm and minimise greenhouse gas emissions. Critical technical solutions may involve harnessing the potential of hydrogen energy and immobilising or preventing greenhouse gas formation technologies. As an alternative direction, the authors consider research to solve some issues related to hydrogen production using metals.