Energy
116 ấn phẩm có sẵn
Đang tải...
Những tài liệu tải lên gần đây
- Ấn phẩmExperimental comparison of water-based cooling methods for PV modules in tropical conditions(2025) Nguyen, Nam QuyenIt is well known that temperature strongly affects the photovoltaic (PV) performance. Raising the working temperature leads to a significant decrease in PV output of the power capacity, and it also lowers power conversion efficiency. This issue is highly important for the PV systems operating in tropical climate areas such as southern Viet Nam. Developing the cooling methods applied for reducing the PV module temperature might be the solution to this problem and has attracted many researchers and industrial sectors. However, the existing research might not sufficiently address the comparative evaluation of multiple active water-based cooling methods on power conservation efficiency, power output, and cost implications under high-temperature conditions in tropical areas. This study is a case study that aims at conducting some experimental investigations for active waterbased cooling methods applied to PV modules in Ho Chi Minh City, South Viet Nam. There are four active water-based cooling methods, including the spraying liquid method (SL), the dripping droplet method (DD), tube heat exchanger method (TE), and the liquid flowing on the PV surface method (LF), that have been developed and experimentally investigated. The voltage, current, temperature, and humidity of the PV cells have been automatically recorded in every one-minute interval via sensors and electronic devices. The experimental results indicate that the surface temperature, the power conversion efficiency, and the output power of PV module are developed toward the useful and positive direction with four cooling methods. In detail, the SL is the best one, in which it leads the PV temperature to reduce from 52 ◦C to 34–35 ◦C, the output power increases up to 6.3%, its power conversion efficiency improves up to 2%, while the water flow rate is at its lowest with 0.65 L/min. Similarly, LF also creates results that are similar to SL, but it needs a higher amount of cooling water, which is up to 3.27 L/min. The other methods, like DD and TE, have less power conversion efficiency compared to the SL; it improves only around 1 to 1.3%. These results might be useful for improving the benefits of PV power generation in some tropical regions and contributing to the green energy development in the world.
- Ấn phẩmFactors to promote construction of mega-scale solar power generation facilities from the viewpoint of local residents in Vietnam(2025) Sato, Yuya; Hoang, Bao NgocSimilar to other countries, Vietnam anticipates a surge in the construction of mega-scale solar power generation (MEGA-SPG) facilities, which are pivotal for advancing renewable energy adoption and achieving sustainable urban development. This study used qualitative interviews to investigate the factors influencing the acceptance of MEGA-SPG among local residents, a critical aspect of promoting sustainability at the community level. This study focuses on residents living near the MEGA-SPG facility in Bà Rịa–Vũng Tàu province, one of the 89 MEGA-SPGs that was operational by June 2019. This facility was selected due to the presence of residences within a 1 km radius. Interviews were conducted with residents of communes located within 1, 3, 5, 10, and 20 km from the facility, and approximately 25 respondents from each commune were surveyed. The results of the analysis reveal that comprehensive disclosures to local residents, including information about the construction plan of a MEGA-SPG, the developer and funders, the impact on the local economy, and the impact on the local environment, are critical in securing community support and enhancing the sustainability of MEGA-SPG operations.
Ấn phẩmComparing long-term power sector pathways in Viet Nam: A simple cost-optimization approach with OSeMOSYS(2025) Tan, Naomi; Harrison, John; Howells, MarkViet Nam is at a critical juncture in planning for its future energy mix due to its fast-growing economy and recent climate commitments. This paper reviews the opportunities and challenges towards a clean energy transition in Viet Nam. Focusing on the power system, this study incorporates the Open Source Energy Modelling System (OSeMOSYS) to explore six different energy scenarios based on existing plans and proposed targets: (i) Power Development Plan VII (revised); (ii) Power Development Plan VIII (draft); (iii) Renewable Energy Development Strategy; (iv) Renewable-Led Pathway; (v) Net Zero; and (vi) Clean Efficient Transition. These scenarios assess trade-offs and synergies of policy decisions, offering insights into potential energy mix alternatives through 2050. Key findings highlight that a fossil fuel phase-out by 2050, supported by approximately 1100 PJ of solar technologies and electricity imports by 2050, aligns with climate commitments and ensures energy security. Energy-efficient technologies could also reduce electricity consumption by 20%, cutting costs and emissions by USD 18 billion and 37 Mton CO2e, respectively. Based on modelling, this study emphasizes renewable energy prioritization, energy efficiency, fossil fuel phase-out, and reinforced emission limits as recommendations to allow Viet Nam to achieve its climate goals. Overall, this paper provides a comprehensive assessment that enhances transparency and reproducibility, supporting the optimal pathway for the development of Viet Nam’s energy sector.- Ấn phẩmA study on sustainability indicators for energy companies in Viet Nam(2025) Tsai, Jung-FaThe energy sector is a cornerstone of Viet Nam’s economic growth, providing critical contributions to development and employment. However, ensuring its long-term sustainability remains a pressing challenge. This study leverages the United Nations’ ESG framework to develop a comprehensive structure for sustainable management indicators tailored to Viet Nam’s energy industry. Through expert interviews and systematic analysis using the modified Delphi and DEMATEL methods, the study identified “Cost Management” as the most critical sustainability indicator, influencing other key areas. Additionally, “Innovation Management”, “Renewable Energy”, “Vocational Training”, and “Human Capital Development” emerged as pivotal for driving sustainability. These findings underscore the importance of aligning sustainability practices with operational efficiency and innovation. The study highlights the urgent need for energy companies to adopt targeted solutions such as cost optimization, investments in renewable technologies, and workforce development to foster sustainable growth. By offering actionable insights and a prioritized framework, this research provides energy companies and policymakers with a practical roadmap to enhance Viet Nam’s energy sustainability and support its economic recovery post-COVID-19.
- Ấn phẩmRenewable energy trade among the ASEAN countries and the road to net-zero carbon emissions(2025) Chee, Wan ChoyIntegration of renewable energy (RE) into the energy mix is essential to achieve net zero emissions (NZE). However, the intermittent nature of solar and wind power can lead to grid instability. Battery energy storage systems (BESS) can help stabilize electricity generation but have a cost. This study develops a mixed-integer non-linear programming model to identify the least-cost pathway for countries of the Association of Southeast Asian Nations (ASEAN) to satisfy growing energy demand and achieve NZE by 2050. Unlike other models, the model presented in this work also considers the green energy transition in a comprehensive manner, including dynamic cost-projections, cross-border electricity trading, sourcing of biomass via land and sea routes, carbon emission reductions, long-term planning horizons, and power-plant deployment schedules. Owing to a lack of data related to carbon capture, utilization and storage (CCUS) and hydrogen, these technologies are excluded from the analysis. The model reveals that it would be optimal for ASEAN to engage in power trading throughout the period 2025–2050. To achieve NZE by 2050, there should be power trading between Brunei and East Malaysia; Laos, Vietnam and Cambodia; and Thailand, Peninsular Malaysia and Singapore. By following this pathway, ASEAN can achieve NZE by 2050 through an expansion of 65 GW hydropower, 649 GW photovoltaic (PV) solar power, 161 GW PV with BESS, 58 GW onshore wind, and 134 GW onshore wind with BESS. The entire system would cost 1.96 trillion USD for the whole period, with an overall LCOE of 0.0377 USD/kWh.
- Ấn phẩmModelling transport decarbonisation pathways in Vietnam: Synergies and trade-offs in supporting the energy transition(2025) Fajriningrum, NuzuliaTransport is the second-largest energy using sector in Vietnam and is projected to have the highest energy and emissions growth in future years. This paper explores options for decarbonising Vietnam’s transport sector using a mixed-methods approach, including qualitative scenario design and quantitative energy system modelling. Three strategies are explored - modal shifting, fuel switching, and improving fuel economy, alongside Vietnam’s 8th Power Development Plan to identify alternative pathways to reduce transport emissions. Further scenarios are constructed to assess the wider implications of low-carbon mobility in fostering Vietnam’s energy transition towards climate mitigation targets. We find that improving fuel economy is the most efficient transport-focused pathway to decouple emission and energy demand from mobility growth, while modal shift is crucial for reducing traffic congestion and carbon dioxide emission. Fuel switching to electric vehicles must be undertaken in parallel with efforts to lower carbon intensity in power generation, to avoid the risk of indirect emissions. Combining all three transport decarbonisation strategies with higher renewables and a carbon tax can fulfil Vietnam’s unconditional Nationally Determined Contributions target by 2030. While the co-benefits of carbon dioxide abatement and fuel import avoidance will improve Vietnam’s energy security and environmental sustainability, the study suggests that the risks of trade-offs in land-use implications and rising future electricity costs must be considered to support a just and equitable energy transition in Vietnam.