scholarly journals Adaptive centrifuge vibration damping module for biofuel production

2021 ◽  
Vol 2094 (4) ◽  
pp. 042086
Author(s):  
K A Bashmur ◽  
O A Kolenchukov ◽  
V A Kachaeva ◽  
E V Tsygankova ◽  
Ya A Tynchenko
Keyword(s):  
Renewable Energy ◽  
New Technology ◽  
Renewable Energy Sources ◽  
Green Energy ◽  
Biodiesel Production ◽  
Biofuel Production ◽  
Ansys Fluent ◽  
Rotor Imbalance ◽  
Operation Process ◽  
Module Efficiency

Abstract The present study considers the problem of obtaining promising renewable energy sources, in particular biofuel. Biomass is the main fuel for green energy accounting for two-thirds of renewable energy. Industry further development depends on improvement of used equipment and technologies. Biofuel usually contains significant amounts of harmful impurities that need to be isolated. The paper deals with the problems of centrifuge operation for the biofuel production. In particular, the most significant operation problem is the residual rotor imbalance which causes torsional oscillations that negatively affect the biodiesel production process and centrifuge reliability. A new technology for damping torsional vibrations of centrifugal device rotating system is described as well as adaptive module device for its implementation is developed. The module main feature is vibrations adaptive level of the rotor elements interaction with external environment. Computer simulation of the module operation process in ANSYS Fluent program was carried out. Data on the module efficiency depending on various factors in the dynamics of its work are obtained. The most effective device configuration is determined.

scholarly journals Microalgae as Sustainable Renewable Energy Feedstock for Biofuel Production

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Srikanth Reddy Medipally ◽  
Fatimah Md. Yusoff ◽  
Sanjoy Banerjee ◽  
M. Shariff
Keyword(s):  
Renewable Energy ◽  
Low Cost ◽  
Renewable Energy Sources ◽  
Lipid Production ◽  
Biomass Concentration ◽  
Commercial Production ◽  
Biodiesel Production ◽  
Biofuel Production ◽  
Energy Sources ◽  
Sustainable Renewable Energy

The world energy crisis and increased greenhouse gas emissions have driven the search for alternative and environmentally friendly renewable energy sources. According to life cycle analysis, microalgae biofuel is identified as one of the major renewable energy sources for sustainable development, with potential to replace the fossil-based fuels. Microalgae biofuel was devoid of the major drawbacks associated with oil crops and lignocelluloses-based biofuels. Algae-based biofuels are technically and economically viable and cost competitive, require no additional lands, require minimal water use, and mitigate atmospheric CO2. However, commercial production of microalgae biodiesel is still not feasible due to the low biomass concentration and costly downstream processes. The viability of microalgae biodiesel production can be achieved by designing advanced photobioreactors, developing low cost technologies for biomass harvesting, drying, and oil extraction. Commercial production can also be accomplished by improving the genetic engineering strategies to control environmental stress conditions and by engineering metabolic pathways for high lipid production. In addition, new emerging technologies such as algal-bacterial interactions for enhancement of microalgae growth and lipid production are also explored. This review focuses mainly on the problems encountered in the commercial production of microalgae biofuels and the possible techniques to overcome these difficulties.

scholarly journals Lighting System Modernization as a Source of Green Energy

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2771
Author(s):  
Leszek Kotulski ◽  
Artur Basiura ◽  
Igor Wojnicki ◽  
Sebastian Siuchta
Keyword(s):  
Renewable Energy ◽  
Urban Areas ◽  
Large Scale ◽  
Energy Savings ◽  
Renewable Energy Sources ◽  
Green Energy ◽  
Light Sources ◽  
Levelized Cost Of Electricity ◽  
Cost Of Electricity ◽  
Lighting Retrofit

The use of formal methods and artificial intelligence has made it possible to automatically design outdoor lighting. Quick design for large cities, in a matter of hours instead of weeks, and analysis of various optimization criteria enables to save energy and tune profit stream from lighting retrofit. Since outdoor lighting is of a large scale, having luminaires on every street in urban areas, and since it needs to be retrofitted every 10 to 15 years, choosing proper parameters and light sources leads to significant energy savings. This paper presents the concept and calculations of Levelized Cost of Electricity for outdoor lighting retrofit. It is understood as cost of energy savings, it is in the range from 23.06 to 54.64 EUR/MWh, based on real-world cases. This makes street and road lighting modernization process the best green “energy source” if compared with the 2018 Fraunhofer Institute cost of electricity renewable energy technologies ranking. This indicates that investment in lighting retrofit is more economically and ecologically viable than investment in new renewable energy sources.

Towards Smart Green Cities: Analysis of Integrated Renewable Energy Use in Smart Cities

2021 ◽  
Author(s):  
Natalia Vukovic ◽  
Ulyana Koriugina ◽  
Daria Illarionova ◽  
Daria Pankratova ◽  
Polina Kiseleva ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Renewable Energy ◽  
Energy Use ◽  
Smart Cities ◽  
Renewable Energy Sources ◽  
Green Energy ◽  
Energy Sources ◽  
Research Findings ◽  
Effective Development ◽  
Green Cities

This study aims to estimate and explore the experience of introducing renewable energy use in the context of the world’s smart cities. In this regard, the study points out that the use of green energy is an important part of sustainable development. Environmental problems are a matter of global concern. Hence sustainable development is one of the approaches to end the harmful anthropogenic impact. The work includes quantitative assessment methods, for example, statistics, quantitative analysis, analogy, and synthesis. As a result, the analysis confirms that the effective development of a smart green city is impossible without the introduction of several renewable energy sources, the integrated use of which will reduce the likelihood of problems with the city’s energy supply. Likewise, the outcome accentuates that the desire to fully switch to renewable energy sources (RES) can be accompanied by several problems as the creation of RES technologies does not always take the risk of abnormal situations into account. In conclusion, the research findings are recommended to be taken into consideration by researchers in the field of smart and sustainable cities development, as well as urbanists and economists for designing future smart green cities based on renewable energy sources.

scholarly journals Renewable Energy-Aware Sustainable Cellular Networks with Load Balancing and Energy-Sharing Technique

2020 ◽  
Vol 12 (22) ◽  
pp. 9340
Author(s):  
Md. Sanwar Hossain ◽  
Khondoker Ziaul Islam ◽  
Abu Jahid ◽  
Khondokar Mizanur Rahman ◽  
Sarwar Ahmed ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Load Balancing ◽  
Outage Probability ◽  
Cellular Networks ◽  
Renewable Energy Sources ◽  
Green Energy ◽  
Solar Pv ◽  
Wide Range ◽  
Energy Sharing

With the proliferation of cellular networks, the ubiquitous availability of new-generation multimedia devices, and their wide-ranging data applications, telecom network operators are increasingly deploying the number of cellular base stations (BSs) to deal with unprecedented service demand. The rapid and radical deployment of the cellular network significantly exerts energy consumption and carbon footprints to the atmosphere. The ultimate objective of this work is to develop a sustainable and environmentally-friendly cellular infrastructure through compelling utilization of the locally available renewable energy sources (RES) namely solar photovoltaic (PV), wind turbine (WT), and biomass generator (BG). This article addresses the key challenges of envisioning the hybrid solar PV/WT/BG powered macro BSs in Bangladesh considering the dynamic profile of the RES and traffic intensity in the tempo-spatial domain. The optimal system architecture and technical criteria of the proposed system are critically evaluated with the help of HOMER optimization software for both on-grid and off-grid conditions to downsize the electricity generation cost and waste outflows while ensuring the desired quality of experience (QoE) over 20 years duration. Besides, the green energy-sharing mechanism under the off-grid condition and the grid-tied condition has been critically analyzed for optimal use of green energy. Moreover, the heuristic algorithm of the load balancing technique among collocated BSs has been incorporated for elevating the throughput and energy efficiency (EE) as well. The spectral efficiency (SE), energy efficiency, and outage probability performance of the contemplated wireless network are substantially examined using Matlab based Monte–Carlo simulation under a wide range of network configurations. Simulation results reveal that the proper load balancing technique pledges zero outage probability with expected system performance whereas energy cooperation policy offers an attractive solution for developing green mobile communications employing better utilization of renewable energy under the proposed hybrid solar PV/WT/BG scheme.

RELEVANCE BIOFUEL PRODUCTION IN RUSSIA

2015 ◽  
Vol 2 (1) ◽  
pp. 46-48 ◽  
Author(s):  
Рахманкулова ◽  
R. Rakhmankulova ◽  
Красникова ◽  
D. Krasnikova
Keyword(s):  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Biofuel Production ◽  
Energy Sources ◽  
Advantages And Disadvantages ◽  
Fuel Pellets

This article explores relevance of obtaining energy using alternative and renewable energy sources. Particular attention is devotes a new kind of biofuel, which has become popular in Europe - fuel pellets. Identified and justified the need to increase the production of pellet fuel in Russia, gives concrete examples, which are supported by figures. Moreover, the authors expound the advantages and disadvantages of biofuel production in Russia

Research on New Technology of Energy Efficient Buildings and Utilization of Renewable Energy Sources

2011 ◽  
Vol 224 ◽  
pp. 104-108
Author(s):  
Ya Guang Sun
Keyword(s):  
Energy Efficiency ◽  
Renewable Energy ◽  
Energy Efficient ◽  
New Technology ◽  
Renewable Energy Sources ◽  
Building Design ◽  
Energy Sources ◽  
Building Technology ◽  
Energy Efficient Buildings ◽  
Energy Efficient Building

Current social development is pressing for energy efficient buildings. The trend of consistent updating of energy-efficient building technology reflects the importance and urgency of energy efficiency in buildings. Through analysis on the current situation of building development, it can be obtained that the energy efficient buildings as well as utilization of renewable energy sources in buildings will be bound to be one of main topics for discussion in future building design.

scholarly journals Determining priorities of scientific and technical cooperation between Ukraine, the EU and Chile in the field of non-conventional renewable energy sources

2019 ◽  
pp. 40-50 ◽  
Author(s):  
Koniaieva Koniaieva ◽  
Vitalina Babenko
Keyword(s):  
Renewable Energy ◽  
Regional Policy ◽  
Renewable Energy Sources ◽  
Green Energy ◽  
Technical Cooperation ◽  
Energy Technology ◽  
Renewable Energy Technologies ◽  
Energy Technologies ◽  
Economic Support ◽  
The Eu

As many programs of scientific and technical cooperation of various fields are being successfully implemented between Ukraine and the EU, the author has set the goal of intensifying relations between Ukraine and Chile in the field of green energy. The cooperation Ukraine has had with the EU serves as an example of future cooperation between Ukraine and Chile. The text explores Chile’s experience in the field of green energy and, through the comparative example of such cooperation between Ukraine and the EU countries, shows that such interaction is a worthwhile endeavor. Based on an analysis of research materials, one of the priority areas of scientific and technical cooperation is the use of non-traditional renewable energy technologies. In Ukraine, and the EU, as well as Chile, there are objective factors (natural, resources, socio-economic, environmental- technological) that concern their development. It is interesting to note Ukraine’s scientific experience and implementation of these technologies and the organizational and economic support of them as priorities in the context of national and regional policy. All aspects of international scientific and technical cooperation, including through the exchange of intellectual products, make it possible to increase the effectiveness of forms of state support, the innovation, production and business activities of Ukraine and the corresponding development of producers and consumers' motivation towards using non-conventional forms of renewable energy technology.

scholarly journals Renewable energy and green market development in Russia

2020 ◽  
Vol 207 ◽  
pp. 02009
Author(s):  
Violetta Gassiy ◽  
Vasiliy Stoikov
Keyword(s):  
Renewable Energy ◽  
Alternative Energy ◽  
Renewable Energy Sources ◽  
Developed Countries ◽  
Green Energy ◽  
The Arctic ◽  
Energy Sources ◽  
Factors Affecting ◽  
Goods And Services ◽  
Green Market

The paper discusses the possibilities of green energy in improving the economic growth of regions, the development of the green market and its importance in implementing environmental protection policy. The author considers the premises for the formation of a market of renewable energy sources in developed countries, studying world trends, as well as the conditions and factors affecting the development of the ecological market of green goods and services in modern Russia. The paper analyzes legislative initiatives to develop an alternative energy market, taking into account Russia’s accession to the Paris climate agreement. The author gives examples of regional experience in Russia that are already implementing projects for the installation of alternative energy generators, wind and solar. The conditions and factors for the energy capacities development based on renewable sources in the Arctic territories are also considered. The author concludes that the development of renewable energy sources must be considered in the line of the energy strategy of Russia, as well as with issues of digitalization of the industry, microgeneration, the introduction of energy storage systems.

scholarly journals Analysis of the Return on Investment in Solar Collectors on the Example of a Household: The Case of Poland

2021 ◽  
Vol 9 ◽  
Author(s):  
Mariusz Niekurzak ◽  
Ewa Kubińska-Jabcoń
Keyword(s):  
Renewable Energy ◽  
Carbon Dioxide Emissions ◽  
Return On Investment ◽  
Renewable Energy Sources ◽  
Economic Benefits ◽  
Green Energy ◽  
Environmental Benefits ◽  
Energy Sources ◽  
Solar Collectors ◽  
The Impact

Background: The growing consumption is what drives the development of unsustainable energy and material-intensive production technologies that emit large quantities of pollutants into the atmosphere, water, and land. Obtaining green energy allows reduction of the interference with the environment and, consequently, fits into a sustainable energy development strategy. In order to achieve the emission targets set by the EU for Poland, it is necessary to prioritize the development of renewable energy sources (RES) technologies within the energy sector.Methods: The purpose of the study was to present the results of the research relating to the return on investment of solar collectors for single-family houses in Poland. The research was presented on the basis of the legal conditions applicable to micro installations in the light of the amendment of the RES Act, and the impact of these amendments on the aspects of such investment was determined.Results: On the basis of the constructed economic model used to assess the return on investment of increasing the area of solar collectors, it has been shown that an operating installation will bring measurable economic benefits in the form of reduction in the amount of energy purchased annually in the amount of 6,756 kWh and environmental benefits in the form of reduction of carbon dioxide emissions to the atmosphere 2.4–3.6 Mg per year. An installation subsidized under the “My Electricity” program can reach an NPV of EUR 6,000 over 20 years at a discount rate r = 0 and assuming that the electricity is EUR 0.15/kWh. If the price rises to 0.2 EUR/kWh, the NPV will be 10,000 EUR. For the analyzed installation, the investment consisting in increasing the collector area in accordance with NPV is economically effective for the absorber area in the range of 5.6–7.6 m2 and reaches the maximum value for the absorber area of 6.6 m2, while the absorber area above 7 m2 contributes to reduce the value of the economic return on investment. The obtained results have been generalized, which allows to use them in the process of selecting the size of collector area for similar installations.Conclusion: The return on investment analysis carried out in respect of a detached house allowed to demonstrate that this project is fully justified. Furthermore, pursuant to the Renewable Energy Sources Act in force in Poland, treating a small entrepreneur as a prosumer who may generally take advantage of favorable conditions for discounting the produced energy leads to very favorable possibilities of settling electricity. Considering an entrepreneur as a prosumer who may use one-off depreciation of a solar collectors installation as a fixed asset and request for VAT refund is what makes such an investment very attractive in financial terms and makes it difficult to find a safe investment alternative characterized by such a high rate of return.

scholarly journals From Energy Blues to Green Energy: Options Before Pakistan

2014 ◽  
Vol 53 (4II) ◽  
pp. 309-325
Author(s):  
Rafi Amir-Ud-Din
Keyword(s):  
Renewable Energy ◽  
Environmental Impact ◽  
Fossil Fuels ◽  
Energy Use ◽  
Renewable Energy Sources ◽  
Green Energy ◽  
Economic Feasibility ◽  
Energy Sources ◽  
Energy Mix ◽  
Current Energy

Energy crisis in Pakistan had been brewing long before it became an important national issue with the potential to significantly affect the outcome of general elections of 2013. The looming crisis of depleting non-renewable energy sources combined with a feeble economy has lent a new urgency to the search for an energy mix which is sustainable, economically viable and environmentally least hazardous. Fossil fuels with their known adverse environmental impacts dominate the current energy mix of Pakistan. The renewable energy sources remain underutilised despite being cost effective and less hazardous for the environment. A substantial amount of literature has highlighted various dimensions of existing energy sources in Pakistan with a particular emphasis on the environmental impact, the sustainability and the efficiency of various energy sources [see Asif (2009); Basir, et al. (2013); Bhutto, et al. (2012); Mirza, et al. (2009, 2008, 2003); Muneer and Asif (2007); Sheikh (2010) for example]. This study analyses the environmental impact, economic feasibility and efficiency of various energy sources subject to various economic and noneconomic constraints. Section 2 discusses energy security by reviewing various tapped and untapped energy sources besides analysing current energy mix and its future prospects. Section 3 highlights the interaction of energy use and environment. Section 4 discusses two approaches to assess the feasibility of an energy mix: disaggregated and aggregated. The latter approach makes a multidimensional comparison of all the energy sources discussed in this study. Section 5 consists of discussion and concluding remarks.

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