scholarly journals Potential and trends of use clean energy in Vietnam

2020 ◽  
Vol 61 (5) ◽  
pp. 1-8
Author(s):  
Ngan Kim Thi Nguyen ◽  
Phuong Thi Hoang ◽  

Currently, the use of clean energy to replace traditional energy is a trend that most countries in the world use to solve the problem: The use of energy so that it can ensure efficient sustainable development, environmental protection, anti-climate change, especially in developing countries like Vietnam. Based on the analysis of the current status of clean energy use in Vietnam, the article gives a comprehensive picture of the potential of developing available clean raw materials such as wind, solar and biomass energy, geothermal energy, energy from domestic waste,... The results of the study are expected to be considered by resource managers in the Clean Energy Exploitation Plan for the rational use of resources and protection. environment in the context of Vietnam's current conditions.

2009 ◽  
Vol 2009 ◽  
pp. 1-16 ◽  
Author(s):  
Barbara Vezzoni ◽  
Nicola Cerullo ◽  
Giuseppe Forasassi ◽  
Emil Fridman ◽  
Guglielmo Lomonaco ◽  
...  

In order to guarantee a sustainable supply of future energy demand without compromising the environment, some actions for a substantial reduction of emissions are nowadays deeply analysed. One of them is the improvement of the nuclear energy use. In this framework, innovative gas-cooled reactors (both thermal and fast) seem to be very attractive from the electricity production point of view and for the potential industrial use along the high temperature processes (e.g., production by steam reforming or I-S process). This work focuses on a preliminary (and conservative) evaluation of possible advantages that a symbiotic cycle (EPR-PBMR-GCFR) could entail, with special regard to the reduction of the HLW inventory and the optimization of the exploitation of the fuel resources. The comparison between the symbiotic cycle chosen and the reference one (once-through scenario, i.e., EPR-SNF directly disposed) shows a reduction of the time needed to reach a fixed reference level from 170000 years to 1550 years (comparable with typical human times and for this reason more acceptable by the public opinion). In addition, this cycle enables to have a more efficient use of resources involved: the total electric energy produced becomes equal to 630 TWh/year (instead of only 530 TWh/year using only EPR) without consuming additional raw materials.


e-xacta ◽  
2013 ◽  
Vol 6 (2) ◽  
pp. 139
Author(s):  
Marco Aurélio S Birchal ◽  
Viviane Santos Birchal

<p align="justify">O Brasil é um grande produtor de álcool largamente utilizado como combustível automotivo. Seu uso na produção de biodiesel cria uma sinergia entre os dois produtos, trazendo oportunidades de novos investimentos e pesquisas em ambas áreas. Apesar do grande potencial que representa, é também verdade que muitas vezes a qualidade do biodiesel é comprometida por métodos de produção rudimentares. O processo de automação emerge como uma poderosa ferramenta na busca de uma maneira de produção melhor e mais confiável. Este trabalho apresenta a automação de uma planta de produção de biodiesel como resultado de uma cooperação entre a PUC – Pontifícia Universidade Católica de Minas Gerais - e a UFMG – Universidade Federal de Minas Gerais -, de modo a aplicar as melhores práticas do estado da automação na produção de biodiesel. Este estudo objetiva manter a auto sustentabilidade e a eficiência do processo de biorefinaria na busca de energia limpa como uma contribuição à matriz energética brasileira. A automação se deu em uma planta em escala piloto, que possibilita a variação de muitos parâmetros, como o tempo e a temperatura de reação e de destilação que, no seu projeto original, necessita de muita interação humana para manter o processo funcionando. Este trabalho emprega tecnologias de automação e controle de última geração, o que resulta em uma maneira robusta, segura e econômica de operar um processo de biorefinaria.</p><p align="justify">Abstract</p><p align="justify">Brazil raises as one of the most promising countries in use of the biomass energy technology due to plenty of its characteristics, such as the large agriculture production and the diversified oleaginous complex, allowing access of many biomass raw materials. Brazil is also a great producer of alcohol widely used as automotive fuel. The biodiesel necessity of alcohol stimulates its productivity and creates a synergy between them, bringing opportunities of new investments and researches. Although the great potential it represents, it is also true that many times the quality of the production is compromised by the archaic and rudimental methods applied. The automation process emerges as a powerful tool in the search of a better and more reliable way of production. This work presents the automation of a pilot biodiesel production plant as a result of cooperation between PUC Minas – Pontifical Catholic University of Minas Gerais and UFMG – Federal University of Minas Gerais, Brazil, in a way of applying the best practices of the state of the art of automation in biodiesel production. This work aims on keeping the auto sustainability and efficiency of the biorefinery process in the search of clean energy as a contribution to the Brazilian energetic matrix. The plant is a self contained pilot scale of an industrial plant that gives the possibility of many parameters variation, like time and temperature reaction and distillation that, in its original design, needs much human interaction to keep the process running. By the use of modern automation devices, this work redesigned the controller process in a high and confident level of automation. As the result, the totally redesigned control process gives a reliable, secure and economic way of operating a biorefinery process.</p>


2021 ◽  
Vol 302 ◽  
pp. 126950
Author(s):  
Nacer Lebbihiat ◽  
Abdelmalek Atia ◽  
Müslüm Arıcı ◽  
Noureddine Meneceur

2021 ◽  
Vol 271 ◽  
pp. 02020
Author(s):  
Dexia Kong ◽  
Jun Liang

Since 2020, under the market trend of the "carbon peak" and "post-coal reform" era, clean energy heating has ushered in development opportunities. This article mainly introduces the current status of solar combined heat pump, biomass energy, electricity, photovoltaic and other heating methods, compares the differences of various types of energy heating, analyzes the advantages and limitations of solar heating, and puts forward reasonable suggestions.


2020 ◽  
Vol 42 (2) ◽  
pp. 76-82
Author(s):  
V.G. Kramar

The purpose of this work is to analyze the energy price change for different kinds of biomass and for natural gas from 2016 to 2020 and to compare it with the relevant trends for countries with a longer experience and  more developed market of fuel biomass. The study revealed that during the significant increase of natural gas price (from June 2016 to December 2018), the energy price of biomass increased at the same or even higher rate than the energy price of natural gas. During the declining natural gas prices (December 2018 to February 2020), when its price almost returned to the situation in mid-2016, the energy price of biomass decreased slightly, but still remains too high, and to date for pellets it is practically equal to the energy price of natural gas. This kind of energy price change for biomass compared to its change for fossil fuels in Ukraine differs significantly from the trends inherent to countries with longer experience of biomass energy use and developed market mechanisms for its pricing (in particular, Austria, Lithuania, Germany, Finland, Sweden). The imperfection of market pricing mechanisms for biomass fuel in Ukraine can be evidenced by the fact that most purchases of biomass in the Prozorro system involve only one supplier. Possible ways to improve the current situation are to promote the creation of more biofuel producers and to improve the conditions for access to raw materials for them, to create a biofuel exchange based on the organizational structure of the Lithuanian biofuel exchange Baltpool, taking into account local conditions.


2007 ◽  
pp. 59-63
Author(s):  
József Antal ◽  
Gábor Grasseli

By joining the European Union, Hungary made a commitment to increasingly utilize renewable energy sources. Keeping in view the agricultural circumstances of Hungary, we can state that biomass utilization has, overall, the greatest range of possibilities to use its products as ‘energy sources’. Biomass raw materials are useful in meeting emission control regulations for environment protection and to reduce climate change. The role of biomass production in spatial and rural development and in rural employment, and also in the decrease of Hungary’s energy dependence, supports development in biomass energy use. My aim in studying biomass utilization is the creation of a micro-regional level, decentralised, agro-energetic system-model for the use of plant and animal biomass for energy purposes, whether naturally or by anthropogenic activity, on agro- and sylvicultural areas, and on animal breeding farms. This model simulation method serves as a planning base for policy-makers during the spatial planning processes. The examination is presently in the stage of data collection. The collection of the basic data of the examination area and the purchase of the necessary equipment, materials and maps has already started. Contact has been made with local stakeholders, municipalities, municipality associations and micro-region managers.


2021 ◽  
Vol 329 ◽  
pp. 01082
Author(s):  
Wenya Wang

In order to better promote the application demonstration of clean energy such as solar energy, wind energy and geothermal energy in Tibet, scientifically develop and make rational use of new energy such as photovoltaic, photothermal, geothermal and wind power, optimize the energy supply structure, improve the guarantee capacity of energy use, and form a comprehensive energy system dominated by clean energy and complemented by other energy. This paper mainly discusses the importance, application and development of solar energy in Tibetan people's life by discussing the utilization of photoelectric and light and heat.


Author(s):  
Lina Yurievna Lagutkina

The author of the article discloses the prospects of development of the world feed production for aquaculture based on the analysis of key innovative technological and market trends. The author specifies that shortage, high cost, low ecological compatibility of traditional raw materials - fish flour - are among major limiting factors in the development of production of feeds for aquaculture. This fact, in turn, limits sustainable development of aquaculture both in Russia, and in the world in general. The article presents the overview of a current status of the world industry of feed production in aquaculture, where the regional situation is studied, as well. For the first time, there is given the outlook of innovative technologies in feed production based on the alternative sources of protein (on the example of projects of leading aquabiotechnological companies) which will determine industry’s objectives for the mid-term perspective.


Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 808
Author(s):  
Gabriel M. Dallago ◽  
Kevin M. Wade ◽  
Roger I. Cue ◽  
J T. McClure ◽  
René Lacroix ◽  
...  

The ability of dairy farmers to keep their cows for longer could positively enhance the economic performance of the farms, reduce the environmental footprint of the milk industry, and overall help in justifying a sustainable use of animals for food production. However, there is little published on the current status of cow longevity and we hypothesized that a reason may be a lack of standardization and an over narrow focus of the longevity measure itself. The objectives of this critical literature review were: (1) to review metrics used to measure dairy cow longevity; (2) to describe the status of longevity in high milk-producing countries. Current metrics are limited to either the length of time the animal remains in the herd or if it is alive at a given time. To overcome such a limitation, dairy cow longevity should be defined as an animal having an early age at first calving and a long productive life spent in profitable milk production. Combining age at first calving, length of productive life, and margin over all costs would provide a more comprehensive evaluation of longevity by covering both early life conditions and the length of time the animal remains in the herd once it starts to contribute to the farm revenues, as well as the overall animal health and quality of life. This review confirms that dairy cow longevity has decreased in most high milk-producing countries over time and its relationship with milk yield is not straight forward. Increasing cow longevity by reducing involuntary culling would cut health costs, increase cow lifetime profitability, improve animal welfare, and could contribute towards a more sustainable dairy industry while optimizing dairy farmers’ efficiency in the overall use of resources available.


Batteries ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 29
Author(s):  
Leonard Kurz ◽  
Mojtaba Faryadras ◽  
Ines Klugius ◽  
Frederik Reichert ◽  
Andreas Scheibe ◽  
...  

Due to the increasing demand for battery electric vehicles (BEVs), the need for vehicle battery raw materials is increasing. The traction battery (TB) of an electric vehicle, usually a lithium-ion battery (LIB), represents the largest share of a BEV’s CO2 footprint. To reduce this carbon footprint sustainably and to keep the raw materials within a closed loop economy, suitable and efficient recycling processes are essential. In this life cycle assessment (LCA), the ecological performance of a waterjet-based direct recycling process with minimal use of resources and energy is evaluated; only the recycling process is considered, waste treatment and credits for by-products are not part of the analysis. Primary data from a performing recycling company were mainly used for the modelling. The study concludes that the recycling of 1 kg of TB is associated with a global warming potential (GWP) of 158 g CO2 equivalents (CO2e). Mechanical removal using a water jet was identified as the main driver of the recycling process, followed by an air purification system. Compared to conventional hydro- or pyrometallurgical processes, this waterjet-based recycling process could be attributed an 8 to 26 times lower GWP. With 10% and 20% reuse of recyclate in new cells, the GWP of TBs could be reduced by 4% and 8%, respectively. It has been shown that this recycling approach can be classified as environmentally friendly.


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