Abundant Renewable Energy Resources Research Articles

Achieving carbon neutrality in an emerging oil-producing country: Renewable energy transition and international trade flows in Ghana

Over the past decade, climate variabilities have emerged as shaping the dynamics of international trade. The adverse externalities posed by climate change require a corresponding improvement in the production of food, trade and the adoption of abundant renewable energy resources. Our study focused on evaluating the impact of renewable energy transition on international trade flows in Ghana. We employed the dynamics ARDL simulation model to analyse our results using data from various institutions. We found that energy transition using both low carbon energy and renewable energy in electricity generation by 1% and 5% significantly increases the balance of trade to the 4th year after which energy transition decreases the balance of trade to the 9th year. After the 9th year, energy transition by both percentages increases the trade balance of Ghana. We observe that the energy transition by 5% has a higher impact than the energy transition by 1%. Additionally, it is observed that using the share of renewable energy in electricity generation has a decreasing rate relative to the first four years. Drafting renewable energy plans such as allocation of funds, supportive policy frameworks and incentives such as green financing, subsidies, and tax incentives can enhance and develop renewable energy infrastructure to increase renewable energy efficiency and reliability for international trade.

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.

Research on coupling coordination and spatial-temporal evolution of hydrogen energy industry in hebei province based on R-P-D chain

In order to promote the sustainable development of the hydrogen energy industry in Hebei Province, this paper investigates the coordinated industrial coupling and spatio-temporal evolution of the "resource conditions-project layout-user demand (R-P-D)" chain within the hydrogen energy industry in Hebei Province. First, a fitness model for the hydrogen energy industry is formulated based on the "(R-P-D)" chain perspective, and a comprehensive evaluation is performed using the AHP entropy weighting method.Subsequently, coupling coordination model of resource condition-project layout (R–P), resource condition-user demand (R-D), project layout-user demand (P-D), and R-P-D chain are constructed. The coupling coordination degree data of the system are then linked with the spatial unit for spatiotemporal evolution and analysis using ArcGIS software. The findings indicate that cities with high levels of economic development, advanced industrialization, abundant renewable energy resources, and well-developed clean energy industries tend to exhibit more harmonious development in the hydrogen energy industry.

Artificial intelligence-driven transformations in low-carbon energy structure: Evidence from China

The widespread integration of artificial intelligence (AI) technology in the realms of energy and the environment has emerged as a catalyst for transformative shifts toward low-carbon energy structures. However, existing literature and practical applications have yet to delve into the intricate ways in which intelligent technology influences energy structures. Consequently, this study addresses this gap by constructing a comprehensive theoretical model that encompasses robots and differentiated energy inputs. By drawing on the Chinese case, this research investigates the impact of AI on low-carbon energy structure transformation, both theoretically and empirically. The study's results reveal that AI technology significantly advances the cause of low-carbon energy transformation. Notably, this effect is manifested in the post-Industry 4.0 era and regions endowed with abundant renewable energy resources and strong governmental support for innovation. Rigorous robustness tests substantiate the existence of this relationship. Furthermore, adopting smart technology fosters energy structure transformation through industrial restructuring, and introduces the energy rebound effect, thereby partially offsetting its positive impact. Importantly, the study underscores that the efficacy of AI is further heightened when the influx of innovation factors surpasses a certain threshold. These findings furnish crucial evidence and policy insights for China and other developing nations, offering guidance on accelerating energy transitions and attaining carbon neutrality.

The spillover effect of mandatory renewable portfolio standards

Renewable Portfolio Standards (RPSs) are one of the most prevalent and impactful clean energy policies implemented by states in the United States. This paper investigates the regional spillover effect of RPS policies using a directed dyad panel dataset of renewable electricity generation in US states from 1991 to 2021. Regional spillover effect is measured in two ways: by considering the influence of an RPS enacted in neighboring states and in states in the same regional transmission organization or independent system operator region. We use dyadic fixed effects estimation and conclude that the neighboring state’s RPS stringency score is a strong determinant of a state’s total renewable electricity generation. For states without an RPS, the positive influence of an RPS in a neighboring state is larger when the non-RPS state has more abundant renewable energy resources than the neighboring RPS state. Our findings suggest that past RPS policy evaluation research using a confined within-state focus may have underestimated the holistic impact of an RPS, as the impacts of an RPS policy can extend beyond the enacting state’s borders. Overall, this study contributes to an improved understanding of the holistic impact of state RPS policies.

Rural electrification in Nigeria: A review of impacts and effects of frugal energy generation based on some of e-waste components

Nigeria is the seventh most populous country in world being the highest in Africa. The country is blessed with vast natural resources and is one of the highest producers of oil in the world. However, the inadequate supply of electrical energy is a major setback in the nation's economic development. Thus, there is need for an urgent and immediate solution to address the electricity access situation in Nigeria. It is in view of this that we first present an overview of the electrical energy situation of Nigeria (especially in the rural areas). The benefits of rural electrification and it impacts are discussed to buttress the need for electrifying rural areas and an overview of the abundant renewable energy resources in Nigeria is presented. As a proposed solution to improve the electricity situation, the concept of a reuse solar photovoltaic system based on e-waste components and old materials is presented. The system comprises repurposed Power Supply Unit (PSU) from old desktop computers, old thermal car Lead-acid batteries, old solar panels and Uninterruptible Power Supply (UPS) units. The possibility of adopting this solution in Nigeria depends on the amount of e-wastes generated annually thus necessitating the need for an analysis to see the annual impact of this system on electricity access based on the amount of available e-waste. Using the huge amount of e-waste generated/received annually in Nigeria, the feasibility of our solution is assessed by estimating the possible number of households that could be electrified by the second life renewable energy systems we propose. Due to the lack of official data in this field, certain constraints and assumptions were defined for the purpose of this analysis which resulted in obtaining a range of results that showed the possible impacts of adopting the reuse system. The analysis showed the minimum and maximum impacts the reuse solution could have on electricity access in Nigeria, based on best and worst case scenario respectively. The results further showed that an average of 287,000 households can be electrified annually if this solution is adopted, causing 2.2 % increment in population with electricity access in a year (between 620 thousand and 4.1 million individuals). Thus, the result is an indication that it is possible to achieve immediate growth in electricity access based on renewable energy integration, frugal innovation and reuse/repurposing of e-waste materials. In addition, this extension of their lifespan reduces their ecological footprint. It is expected that the energy demands of the continuously growing population can be met by strict adherence to set targets including adoption of smart-grids, generation diversification and focusing on rural electrification.

E-VAHAN CHARGING STATION

In a technological world where both pollution and population increase every day, electric vehicles play a key role in saving energy and reducing carbon dioxide emissions and harmful greenhouse gasses in transportation. Rapid changes are occurring in the electrical industry. Rising energy prices, mass electrification of everyday life, and global warming are the main factors determining the speed with which such changes occur. In response to the growing demand for sustainable transportation solutions and the urgent need to reduce carbon dioxide emissions, the concept of the E-Vahan Charging Station emerged as a pioneering initiative. This innovative project seeks to harness the abundant renewable energy resources of solar and wind power to revolutionize the way electric vehicles (EVs) are charged. As the world transitions towards a greener future, this charging station represents a crucial step in promoting clean and Eco-conscious mobility. Index Terms: Electrification, Harness, Pioneering, Initiative, Crucial, Eco-conscious, E-Vahan Charging Station, etc.

International EV policies: A comparative review of strategies in the United States and Nigeria for promoting electric vehicles

This paper provides a comprehensive comparative analysis of the strategies employed by the United States and Nigeria in promoting electric vehicles (EVs) within their respective national contexts. As the world shifts towards sustainable energy solutions, EVs have emerged as a pivotal component in reducing greenhouse gas emissions and mitigating climate change. Drawing upon a range of scholarly literature, governmental reports, and policy documents, this study examines the policy frameworks, incentives, and challenges faced by both countries in fostering the adoption of EVs. In the United States, a diverse array of federal, state, and local initiatives have been implemented to incentivize EV adoption, including tax credits, rebates, infrastructure investments, and regulatory mandates. Moreover, collaborations between the government, industry stakeholders, and research institutions have facilitated technological advancements and market growth in the EV sector. However, challenges such as range anxiety, high upfront costs, and inadequate charging infrastructure continue to impede widespread adoption. Conversely, Nigeria, while grappling with its own set of socio-economic and infrastructural challenges, has exhibited a nascent interest in promoting EVs as part of its broader sustainable development agenda. Despite lacking a comprehensive national policy framework, various initiatives such as tax exemptions, import duty waivers, and pilot projects have been introduced to stimulate EV uptake. Moreover, Nigeria's abundant renewable energy resources offer a promising opportunity for leveraging EVs to enhance energy security and reduce dependence on fossil fuels. Nevertheless, significant barriers such as limited infrastructure, affordability constraints, and institutional capacity gaps pose formidable obstacles to scaling up EV adoption in the country. By juxtaposing the experiences of the United States and Nigeria, this study contributes valuable insights into the diverse approaches and lessons learned in crafting effective international EV policies amidst varying socio-economic contexts. Through a nuanced understanding of the policy landscape, policymakers, industry stakeholders, and researchers can identify strategies for overcoming barriers and accelerating the transition towards a sustainable transportation paradigm.

Furfural production from lignocellulosic biomass: one-step and two-step strategies and techno-economic evaluation

The conversion of lignocellulose biomass to furfural can be performed using one-step and two-step strategies. A techno-economic analysis plays a crucial role in evaluating the overall economic feasibility of industrial-scale furfural production.

Nearly-zero carbon optimal operation model of hybrid renewable power stations comprising multiple energy storage systems using the improved CSO algorithm

In light of the abundant renewable energy resources in Northwestern China, this study introduces a novel hybrid power plant structure known as the (Renewable energy-concentrating solar power-combined heat and power) RCC system. The RCC system integrates various energy sources, including the photovoltaic, the wind power plant, the concentrating solar power (CSP) plant, and the combined heat and power (CHP) plant. It also incorporates power-to-gas (P2G) technology to convert wind and solar power surpluses into methane. Moreover, carbon capture and storage (CCS) technology is applied to capture carbon dioxide emissions from the CHP plants, which serves as a raw material for the P2G process. To address the energy trilemma, we develop a nearly-zero carbon emission optimization model for the RCC system, considering different renewable energy source (RES) endowments. The fuzzy membership function method is employed to identify the optimum satisfaction target across multiple attributes. An enhanced CSO algorithm is introduced and validated using a simulation study on a CSP plant in Dunhuang. The results show that compared with traditional power stations, the proposed RCC system can reduce the investment cost by 34.45 %, increase the operating income by 17.7 %, and reduce carbon emission by 3.2 %. At the same time, the methane stock in the system increased by 53.7 % compared with the traditional power station containing P2G equipment, which helps the hybrid power station to participate in the methane market and obtain more profits. In addition, the direct energy supply ratio of RES decreased by 83.16 %, reducing the risk of the system caused by the uncertainty of RES. To sum up, the proposed RCC system has a good development prospect.

The Use of Fungi of the Trichoderma Genus in Anaerobic Digestion: A Review.

Plant waste biomass is the most abundant renewable energy resource on Earth. The main problem with utilising this biomass in anaerobic digestion is the long and costly stage of degrading its complex structure into simple compounds. One of the promising solutions to this problem is the application of fungi of the Trichoderma genus, which show a high capacity to produce hydrolytic enzymes capable of degrading lignocellulosic biomass before anaerobic digestion. This article discusses the structure of plant waste biomass and the problems resulting from its structure in the digestion process. It presents the methods of pre-treatment of lignocellulose with a particular focus on biological solutions. Based on the latest research findings, key parameters related to the application of Trichoderma sp. as a pre-treatment method are discussed. In addition, the possibility of using the digestate from agricultural biogas plants as a carrier for the multiplication of the Trichoderma sp. fungi, which are widely used in many industries, is discussed.

Control and optimization of a hybrid solar PV – Hydro power system for off-grid applications using particle swarm optimization (PSO) and differential evolution (DE)

The use of artificial intelligence (AI) – based tools in the optimization of renewable energy (RE) systems is increasing. These tools could even be more useful to developing countries like Cameroon with abundant RE resources, yet low rural electrification rate. However, the optimization of these energy systems especially in hybrid forms is still a challenge. This paper uses an AI-based Particle Swarm Optimization (PSO) and Differential Evolution (DE) for the design and optimization of a stand-alone hybrid solar PV – hydro- battery power system. These algorithms were developed using the MATLAB software. The proposed smart algorithms ensure that the load is met at a minimum levelized cost of energy (LCOE) and acceptable loss of power supply probability (LPSP). After simulation, DE gave an optimum LPSP of 0.0499 and optimum LCOE of 0.06192 $/kWh after the 19th iteration under set operational limits while PSO gave an optimum LPSP of 0.0492 and optimum LCOE of 0.06358 $/kWh after the 40th iteration. The optimal net present value (NPC) obtained from the PSO and DE were USD $ 96,175.26 and USD $ 93,958.07 respectively. While DE gave a lesser LCOE than PSO, the LPSP obtained using the PSO technique was smaller, signifying more system reliability. The optimum system size of DE showed the least LCOE with the proposed capacities of 1 kW PV, 33.96 kW hydropower and zero battery. The optimized system ensures a proper power management within the hybrid system. An appraisal of the two algorithms showed that the DE tool is accurate and a better option than PSO in terms of cost and speed of convergence. Further statistical analysis revealed that PSO was more robust. The optimal cost function obtained from both algorithms is acceptable for rural electrification projects.

Environmental cost of natural resources, globalization, and economic policy uncertainty in the G-7 bloc: do human capital and renewable energy matter?

The panel of G-7 economies is considered one of the most prosperous economies, endowed with abundant natural and renewable energy resources. Due to their richness in these resources, most economic development and activities, including environmental and economic aspects, depend on and are determined by energy consumption and natural resource rents. However, the increasing dependence of G-7 economies on energy consumption and natural resources raises questions about their long-term growth and ecological policies towards achieving sustainable development goals (SDGs). Therefore, the main objective of this study is to examine the influence of natural resources, renewable energy, economic policy uncertainty, human capital, and globalization on the ecological footprint in the panel of G-7 economies from 1990 to 2020. After confirming the cross-sectional dependence issue, this study applied second-generation panel data approaches to estimate robust and reliable outcomes. The estimated evidence from this study discovered that natural resources, globalization processes, and economic policy uncertainty significantly increase the level of ecological footprint in the region. In contrast, renewable energy and human capital provide feasible solutions for ecological improvement in the study area. Likewise, the interactive role of renewable energy with economic policy uncertainty significantly protects the environmental quality in the study area. Based on the estimated findings, this study recommends various achievable policy options for policymakers and the governments of these economies to ensure environmental sustainability.

Energy use for tulip cultivation in a subtropical zone

Tulip growth involves a warm–cold–warm cycle and this work addresses the possibility of carrying out the final warm step of this cycle during the winter months of a subtropical country where electric power has a low price — Paraguay. This is a result of an abundance of renewable energy resources mainly due to the presence of two large hydroelectric power plants. This final cultivation step requires temperatures between 16 °C and 20 °C during a period of about five months. Historic climate data suggest that the city of Encarnación is suitable for tulip cultivation in Paraguay. However, because of temperature fluctuations, air conditioning may occasionally be necessary for cooling or heating. Using a transient model, we simulate the thermal conditions of the nursery to find the energy needed for air conditioning. Good thermal insulation and injection of external ambient air to control the nursery’s temperature whenever possible reduce the use of electrical energy.

Enhancing decarbonization of power generation through electricity trade in the Eastern Mediterranean and Middle East Region

The region of the Eastern Mediterranean and Middle East (EMME) is one with highly diverse socioeconomic conditions. It is split between countries with rich fossil fuel reserves, which are net energy exporters, and countries that rely to a large extent on energy imports to satisfy their domestic demand. Despite the abundant renewable energy resources, especially for wind and solar, in 2019 renewable energy accounted for merely 12% of the total electricity generation across the region. The present effort aims to highlight the potential benefits offered by a future enhancement in electricity trade between EMME countries; this could unlock the currently unexploited renewable energy resources of the region. A model representing the national electricity supply system of seventeen EMME countries is developed in a cost-optimisation modelling framework (OSeMOSYS). This is then used to project cost-optimal development pathways for the respective energy systems, by assessing alternative scenarios where regional trade is limited or enhanced. Comparison of a set of scenarios is conducted to quantify implications in terms of renewable energy deployment, greenhouse gas emissions and overall system costs. Results from the analysis indicate that in the absence of climate neutrality ambition across the region, electricity trade is limited to existing levels. However, the need for electricity trade increases when countries strive to decarbonise their electricity supply cost-effectively.

A Techno-Economic Study for Off-Grid Green Hydrogen Production Plants: The Case of Chile

In this study, we present a pre-feasibility analysis that examines the viability of implementing autonomous green hydrogen production plants in two strategic regions of Chile. With abundant renewable energy resources and growing interest in decarbonization in Chile, this study aims to provide a comprehensive financial analysis from the perspective of project initiators. The assessment includes determining the optimal sizing of an alkaline electrolyzer stack, seawater desalination system, and solar and wind renewable energy farms and the focus is on conducting a comprehensive financial analysis from the perspective of project initiators to assess project profitability using key economic indicators such as net present value (NPV). The analyses involve determining appropriate sizing of an alkaline electrolyzer stack, a seawater desalination system, and solar and wind renewable energy farms. Assuming a base case production of 1 kiloton per year of hydrogen, the capital expenditures (CAPEX) and operating expenses (OPEX) are determined. Then, the manufacturing and production costs per kilogram of green hydrogen are calculated, resulting in values of USD 3.53 kg−1 (utilizing wind energy) and USD 5.29 kg−1 (utilizing photovoltaic solar energy). Cash flows are established by adjusting the sale price of hydrogen to achieve a minimum expected return on investment of 4% per year, yielding minimum prices of USD 7.84 kg−1 (with wind energy) and USD 11.10 kg−1 (with photovoltaic solar energy). Additionally, a sensitivity analysis is conducted to assess the impact of variations in investment and operational costs. This research provides valuable insights into the financial feasibility of green hydrogen production in Chile, contributing to understanding renewable energy-based hydrogen projects and their potential economic benefits. These results can provide a reference for future investment decisions and the global development of green hydrogen production plants.

THE POTENTIAL, BARRIERS. AND STRATEGIES TO UPSCALE RENEWABLE ENERGY ADOPTION IN DEVELOPING COUNTRIES: NIGERIA AS A CASE STUDY

Renewable energy plays a crucial role in sustainable development strategies, especially for developing countries like Nigeria that face energy challenges. This paper explores how deploying renewable energy in Nigeria can contribute to meeting the country's energy needs, drive economic growth, and support to achieve Nigeria’s environmental sustainability goal. As Africa's most populous nation and largest economy, Nigeria depends heavily on fossil fuels for its energy needs despite having abundant renewable energy resources such as solar, wind, hydro, and biomass. Harnessing renewable energy in Nigeria offers numerous benefits. First, renewable energy offers a pathway to diversify Nigeria's energy sources, reducing dependence on fossil fuels and enhancing energy security. Second, deploying renewable energy can stimulate economic growth by attracting investment, fostering local entrepreneurship and creating job opportunities. Third, transitioning to renewable energy sources helps to reduce greenhouse gas emissions, and alleviate environmental issues associated with traditional energy sources. However, several challenges hinder the widespread adoption of renewable energy in Nigeria. These challenges include policy and regulatory barriers, limited access to financing, inadequate infrastructure, and a lack of technical capacity. Overcoming these obstacles requires a multi-faceted approach, including policy reforms, financial incentives, infrastructure development, capacity building, and fostering public-private partnerships. By drawing insights from successful renewable energy projects and initiatives in other developing countries, Nigeria can develop tailored strategies to effectively harness its renewable energy potential. The application of these strategies offers Nigeria an opportunity to achieve its sustainable development goals, enhance energy access, and promote prosperity. Achieving these goals will also require collaboration from government, industry stakeholders, and civil society. Keywords: Renewable energy, strategy, Developing countries, Nigeria, Case study.

Current Development Status, Policy Support and Promotion Path of China’s Green Hydrogen Industries under the Target of Carbon Emission Peaking and Carbon Neutrality

The green hydrogen industry, highly efficient and safe, is endowed with flexible production and low carbon emissions. It is conducive to building a low-carbon, efficient and clean energy structure, optimizing the energy industry system and promoting the strategic transformation of energy development and enhancing energy security. In order to achieve carbon emission peaking by 2030 and neutrality by 2060 (dual carbon goals), China is vigorously promoting the green hydrogen industry. Based on an analysis of the green hydrogen industry policies of the U.S., the EU and Japan, this paper explores supporting policies issued by Chinese central and local authorities and examines the inherent advantages of China’s green hydrogen industry. After investigating and analyzing the basis for the development of the green hydrogen industry in China, we conclude that China has enormous potential, including abundant renewable energy resources as well as commercialization experience with renewable energy, robust infrastructure and technological innovation capacity, demand for large-scale applications of green hydrogen in traditional industries, etc. Despite this, China’s green hydrogen industry is still in its early stage and has encountered bottlenecks in its development, including a lack of clarity on the strategic role and position of the green hydrogen industry, low competitiveness of green hydrogen production, heavy reliance on imports of PEMs, perfluorosulfonic acid resins (PFSR) and other core components, the development dilemma of the industry chain, lack of installed capacity for green hydrogen production and complicated administrative permission, etc. This article therefore proposes that an appropriate development road-map and integrated administration supervision systems, including safety supervision, will systematically promote the green hydrogen industry. Enhancing the core technology and equipment of green hydrogen and improving the green hydrogen industry chain will be an adequate way to reduce dependence on foreign technologies, lowering the price of green hydrogen products through the scale effect and, thus, expanding the scope of application of green hydrogen. Financial support mechanisms such as providing tax breaks and project subsidies will encourage enterprises to carry out innovative technological research on and invest in the green hydrogen industry.

The Central American Power System: Achievements, Challenges, and Opportunities for a Green Transition

Over the past few decades, Central American countries have seen a steady increase in their energy needs. Luckily, the region has abundant renewable energy resources and, as a result, has been busy constructing wind and photovoltaic power facilities. However, while these renewable sources are promising, they come with some risks—mainly, their variable power generation can pose a challenge to the interconnected regional system. This paper explores the current state of the Central American power system and the obstacles it faces as it strives to transition to a more environmentally-friendly energy system. To do so, the authors employed power flow analysis and transient stability studies, which were conducted using ETAP (Electrical Transient Analyzer Program) to model and simulate the power system. Their study revealed that the Central American power system is at risk of instability, and they suggest that integrating ancillary services and storage solutions could strengthen its resilience. Additionally, the authors advocate for the development of microgrids, energy management, and sustainable decarbonization plans. Lastly, the authors emphasize the importance of short-, medium-, and long-term power planning to make better decisions.

Evaluation of alternative power-to-chemical pathways for renewable energy exports

Over the last five decades, there have been several phases of interest in the so-called hydrogen economy, stemming from the need for either energy security enhancement or climate change mitigation. None of these phases has been successful in terms of a major market development, mainly due to the lack of cost competitiveness and partially due to technology readiness challenges. Nevertheless, a new phase has begun very recently, which despite holding original objectives has the new motivation to be fully green, i.e. based on renewable energy. This new movement has already initiated bipartisan cooperation of some energy importing countries and those with abundant renewable energy resources and supporting infrastructure. One key challenge in this context is the diversity of pathways for the (national and international) export of non-electricity renewable energy. This poses another challenge, that is the need for an agnostic tool for comparing various supply chain pathways fairly while considering various techno-economic factors such as renewable energy sources, hydrogen production and conversion technologies, transport, and destination markets, along with all associated uncertainties.This paper addresses the above challenge by introducing a probabilistic decision analysis cycle methodology for evaluating various renewable energy supply chain pathways based on the hydrogen vector. The decision support tool is generic and can accommodate any kind of renewable chemical and fuel supply chain option. As a case study, we have investigated eight supply chain options composed of two electrolysers (alkaline and membrane) and four carrier options (compressed hydrogen, liquefied hydrogen, methanol, and ammonia) for export from Australian ports to three destinations in Singapore, Japan, and Germany. The results clearly show the complexity of decision making induced by multiple factors, and that the preferred supply chain combination (electrolyser technology, green energy carrier) in terms of least cost strongly depends on whether the expected levelized cost of hydrogen (ELCOH) or the expected levelized cost of energy (ELCOE) is used as a decision criterion. For instance, with ELCOH for the case study, under the given input parameters, the Ammonia combination with alkaline electrolysers (AE-NH3) becomes the least-cost supply chain option for Singapore, Japan, and Germany with values of 8.60, 8.78 and 9.63 $/kgH2, respectively. This leaves liquid hydrogen (with alkaline electrolysers) as the second-best supply chain route, with ELCOH values of 9.05, 9.39 and 10.70 $/kgH2, respectively. However, with ELCOE, methanol (with alkaline electrolysers) becomes the preferred supply chain path for all destinations, and liquid hydrogen (with alkaline electrolysers) keeps its place as the second-best alternative.