scholarly journals Atmospheric flows in large wind farms

2021 ◽  
Vol 52 (5) ◽  
pp. 20-23
Author(s):  
R.A. Verzijlbergh
Keyword(s):  
Wind Farms ◽  
Energy System ◽  
Primary Energy ◽  
Energy Sources ◽  
Renewable Sources ◽  
Atmospheric Flows ◽  
Large Wind

As we are transitioning to an energy system based on renewable sources, the atmosphere is becoming one of our primary energy sources. Understanding atmospheric flows through wind farms has become an issue of large economic and societal concern.

scholarly journals Renewable Energy Sources as a Development Opportunity for Peripheral Areas

2020 ◽  
Vol 13 (2) ◽  
pp. 184-198
Author(s):  
Piotr Gradziuk ◽  
Barbara Gradziuk
Keyword(s):  
Renewable Energy ◽  
Renewable Energy Sources ◽  
Primary Energy ◽  
Peripheral Region ◽  
Energy Sources ◽  
Small Scale ◽  
Low Carbon ◽  
Renewable Sources ◽  
Low Carbon Economy ◽  
The Subject

SummarySubject and purpose of work: The subject of this analysis and evaluation is the use of renewable energy sources in Poland, particularly in the Lubelskie Voivodeship, as a peripheral region. The purpose of this paper is to identify the role and evaluate the scale and effects of using renewable energy sources (RES), as well as the availability and absorption of financial resources for RES promotion.Materials and methods: The data were obtained from the Office of the Ruda-Huta Commune, the Regional Operational Programme Department of the Marshal Office of the Lubelskie Voivodeship in Lublin and the Department of European Funds of the Ministry of Energy, as well as Statistics Poland (GUS) and the literature on the subject.Results: In Poland the proportion of energy from renewable sources to the total primary energy generated increased in 2012-2018 from 11.73% to 14.46%. A new phenomenon, which has been highly significant for the development of this sector, is the use of innovative, small-scale technologies of energy generation from renewable sources, which created the foundations for the growth of a citizens’ energy sector, based on the initiative of the citizens and their communities. The use of RES contributes to reduced expenditures on the purchase of energy carriers and constitutes an effective method of implementing plans for developing a low-carbon economy and reducing low-stack emissions.Conclusions: The continuing disparities between the regions point to the need for active structural intervention to maintain economic, social and territorial cohesion, particularly in areas which are considered peripheral and have a very low GDP per capita. One of the preferred directions should be to support the use of RES.

Energy Sources

Energy ◽  
2012 ◽  
Author(s):  
José Goldemberg
Keyword(s):  
Energy System ◽  
Primary Energy ◽  
Energy Sources ◽  
The World

Which are the primary energy sources? The world′s energy system is very large: in 2008 it amounted to 492 exajoules, corresponding to 11.75 billion tons of oil equivalent (toe). With a population of almost 6.7 billion people, this corresponds approximately to 1.75 toe per...

scholarly journals German support systems for onshore wind farms in the context of Polish acts limiting wind energy development

2017 ◽  
Vol 34 (1) ◽  
pp. 109-115 ◽  
Author(s):  
Leszek Dawid
Keyword(s):  
Renewable Energy ◽  
Wind Energy ◽  
Support Systems ◽  
Renewable Energy Sources ◽  
Wind Farms ◽  
Energy System ◽  
Energy Sources ◽  
Onshore Wind ◽  
Low Emission ◽  
Wind Energy Development

Abstract European energy system is undergoing a deep transition to low-emission energy sources, mainly wind farms. This transition is caused mostly by energy politics of European Union (EU) and its goals in the topic of renewable energy. European wind energy is dominated by Germany that produces half of total wind energy in EU. The aim of this article is to present support systems for wind farms existing in Germany in the context of introducing in Poland the Act of 20 May 2016 on Wind Energy Investments limiting onshore wind farms localization and Act of 22 June 2016 introducing changes to the Act on Renewable Energy Sources (RES) and some other acts. It is postulated to make amendments of acts regulating RES while considering German solutions.

scholarly journals Advanced Green Technologies Toward Future Sustainable Energy Systems

2019 ◽  
Vol 4 (1) ◽  
pp. 89
Author(s):  
Muhammad Aziz
Keyword(s):  
Oil And Gas ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Primary Energy ◽  
Energy Sources ◽  
Green Technologies ◽  
Fossil Energy ◽  
Secondary Energy ◽  
The Future ◽  
New Energy

Currently, the usable energy is basically harvested from the fossil energy sources, including coal, oil, and gas, which are believed to harm the environment due to the emitted GHGs. The awareness to the climate change and limited reserve of fossil energy sources has led to a strong motivation to develop a new energy system which can facilitate three important pillars: security, clean environment, and economic opportunity. This future energy system is strongly expected to be able to blend both fossil and renewable energy sources, while minimize its environmental impacts. To realize it, the primary energy sources are converted to the efficient secondary energy sources, including electricity and hydrogen. These two kinds of secondary energy source are considered very promising in the future, following a high demand in many sectors. In transportation sector, both electricity and hydrogen are believed to become the future fuels as the deployment of electric and fuel cell vehicles is increasing rapidly. In this paper, several potential technologies to produce the energy cleanly from primary energy sources are introduced and evaluated. In addition, clean and efficient technologies in storage and utilization are also described.

scholarly journals The necessity of storage technology development for unpredictable energy sources

2021 ◽  
Vol 342 ◽  
pp. 04009
Author(s):  
Maria Daniela Stochitoiu ◽  
Ilie Utu ◽  
Leon Pana
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Energy Production ◽  
Technology Development ◽  
Storage Systems ◽  
Energy System ◽  
Energy Sources ◽  
Renewable Sources ◽  
Storage Technology ◽  
New Energy

The renewable energy is more and more used and represents a higher and higher percentage in the world’s total energy production. The reliability of the renewable sources proves to be less predictable than the conventional ones. The need of new energy storage systems becomes imperative, and when used altogether with renewable sources, they improve the predictability of those sources, thus making possible their use in the energy system market.

scholarly journals Impact of Material On Energy Efficiency of Distribution System

2019 ◽  
Author(s):  
Peter Hrabovský
Keyword(s):  
Renewable Energy ◽  
Negative Impact ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Energy Performance ◽  
Energy Sources ◽  
Material Structure ◽  
The Sun ◽  
Renewable Sources ◽  
The Earth

The article focuses on technologies that are closely linked to the use of renewable energy sources. We are living at a time when the emphasis is on increasing the share of production and use of heat and electricity generated by technologies using the sun, wind, water and earth. By transforming energy from sources like the Sun and the Earth, we use solar, photovoltaic collectors, heat pumps and circulation systems. Energy production in these ways is limited, therefore the research and development of individual systems is pushing the possibilities of using renewable energy sources forward. The main objective of obtaining energy from renewable sources is to cover the energy performance of buildings and people’s requirements to ensure optimal thermal comfort with maximum use of energy from renewable sources. When designing the required technologies, it is necessary to emphasize the choice of construction material for individual parts of the energy system. If we want to extract energy from the earth it is necessary to design a material suitable for aggressive soil environment – the Earth’s shell. The negative impact of soil chemical and physical properties affects not only the material structure of a part of the technology, but also the overall efficiency of the energy system.

scholarly journals Energy passivation of a building. The ICSTM building case study

2019 ◽  
Vol 112 ◽  
pp. 02003
Author(s):  
Otilia Nedelcu ◽  
Ioan Corneliu Salisteanu ◽  
Traian Ivanovici ◽  
Valentin Dogaru
Keyword(s):  
Renewable Energy ◽  
Residential Buildings ◽  
Renewable Energy Sources ◽  
Energy System ◽  
Energy Sources ◽  
Renewable Sources ◽  
Consumption Data ◽  
External Power ◽  
Technological Research Institute

The renewable energy sources are becoming more and more current in the energy supply of buildings, from residential buildings to institutional buildings. The renewable energy sources have proved to be a solution and an important element of the Romanian Energy System. We are starting from the idea of using the renewable sources to passivize a building, and we are relying on existing facilities in the Multidisciplinary Scientific and Technological Research Institute (ICSTM) from Valahia University of Targoviste (UVT) to produce the energy from its own sources. We are also considering the consumption data from previous year as well as the electric link to external power grid. This paper aims to propose new renewable energy units so that ICSTM become energetical independent. Currently, the ICSTM building consumes an amount of energy produced from renewable sources about three times less than that consumed from the external network. In order to determine the number of equipment, specifically CPV (concentrating photovoltaic) panels placed on trackers, it is desirable to create a 40% reserve above the installed power, taking in account the possible future development of the research laboratories.

scholarly journals Public attitudes and environmental impacts of wind farms: a review

2013 ◽  
Vol 15 (4) ◽  
pp. 585-604 ◽  
Keyword(s):  
Environmental Impact ◽  
Human Health ◽  
Wind Power ◽  
Wind Turbines ◽  
Energy Production ◽  
Public Attitudes ◽  
Wind Farms ◽  
Energy Sources ◽  
Renewable Sources ◽  
The Impact

<p>The promotion of renewable sources for electricity production, independent of carbon fuels and nuclear power, is a priority in the energy policy of many countries all over the world. The European Union has launched an ambitious program to increase the contribution of energy production from wind turbines; the aim set for the year 2020 is that wind power should account for 31% of EU&rsquo;s current target regarding 20% reductions of carbon dioxide. This policy is favored by the fact that wind energy production cost is nowadays competitive in many cases to the cost of electricity produced from conventional non-renewable sources. However, there is a conflict concerning public attitudes: although the public in general is in favor of renewable energy sources including wind, there is usually very strong opposition by local people living in neighboring areas of wind farm developments that is attitudes toward wind power are to a large extent different from attitudes toward wind farms. It is also interesting that negative public opinion is rather high during the planning stage and significantly lower during the implementation stage. In addition, there are impacts on landscape aesthetic, human health as well as ecological impact on the flora and fauna, although compared to environmental impact from conventional energy sources, the environmental impact caused by wind turbines is relatively minor. Recent developments of offshore wind farms seemed to avoid people&rsquo;s negative attitudes and soften public resistance and hostility against wind power energy but these expectations were rather optimistic. Opposition due to seascape aesthetic spoiling is as strong even for the marine environment. The impact on marine life and particularly on sea mammals due to noise and vibrations need to be further investigated. Existing activities such as navigation, fishing and recreational activities should not be hindered during site selection and planning. In the present work public attitudes and impacts on human health as well as impacts on landscape and ecosystem level, both terrestrial and marine, are reviewed and discussed.</p>

Clean Energy, a Sine Qua Non Condition for Sustainable Development

2018 ◽  
Vol 4 (5) ◽  
pp. 49-58
Author(s):  
Georgeta Soava ◽  
Anca Mehedintu ◽  
Mircea Raduteanu
Keyword(s):  
Renewable Energy ◽  
Energy Production ◽  
Renewable Energy Sources ◽  
Clean Energy ◽  
Primary Energy ◽  
Energy Sources ◽  
Analysis Tool ◽  
Energy Prices ◽  
Renewable Sources ◽  
The Impact

Starting from the reality that Europe is in full transition, the aim of this study is to carry out an analysis to determine the contribution of renewable energy sources to primary energy production and also to determine the impact of the increase in the share of renewable energy on energy prices, on the economy. The study is based on the 2011 – 2015 information taken from the most recent studies conducted at EU and Romanian level on action plans on renewable energy sources and energy efficiency. On the basis of the data collected, the analysis focused on the share of renewable energy sources in energy production and primary energy production from renewable sources divided by individual sources and the structure of consumption on the main activities of the national economy to see how various factors influence the future of clean energy and the impact on energy prices. For analysis, a dynamic analysis tool was used, the Risk module in the Palisade software package, which through a series of simulations allows combining the identified uncertainties. The results of the analysis and simulations carried out made highlight the best scenarios of increasing the share of renewable sources in energy production, to lower energy prices and to sustainable economic growth.

scholarly journals Energy Flexibility as Additional Energy Source in Multi-Energy Systems with District Cooling

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 519
Author(s):  
Alice Mugnini ◽  
Gianluca Coccia ◽  
Fabio Polonara ◽  
Alessia Arteconi
Keyword(s):  
Energy Source ◽  
Energy Demand ◽  
Energy Systems ◽  
Energy System ◽  
Energy Performance ◽  
Primary Energy ◽  
Energy Sources ◽  
Variable Load ◽  
Additional Energy ◽  
The Impact

The integration of multi-energy systems to meet the energy demand of buildings represents one of the most promising solutions for improving the energy performance of the sector. The energy flexibility provided by the building is paramount to allowing optimal management of the different available resources. The objective of this work is to highlight the effectiveness of exploiting building energy flexibility provided by thermostatically controlled loads (TCLs) in order to manage multi-energy systems (MES) through model predictive control (MPC), such that energy flexibility can be regarded as an additional energy source in MESs. Considering the growing demand for space cooling, a case study in which the MPC is used to satisfy the cooling demand of a reference building is tested. The multi-energy sources include electricity from the power grid and photovoltaic modules (both of which are used to feed a variable-load heat pump), and a district cooling network. To evaluate the varying contributions of energy flexibility in resource management, different objective functions—namely, the minimization of the withdrawal of energy from the grid, of the total energy cost and of the total primary energy consumption—are tested in the MPC. The results highlight that using energy flexibility as an additional energy source makes it possible to achieve improvements in the energy performance of an MES building based on the objective function implemented, i.e., a reduction of 53% for the use of electricity taken from the grid, a 43% cost reduction, and a 17% primary energy reduction. This paper also reflects on the impact that the individual optimization of a building with a multi-energy system could have on other users sharing the same energy sources.

Sign in / Sign up

Export Citation Format

Share Document