Using Three Approaches To Determine Whether Renewable Energy Sources Have Replaced Fossil Fuel

2018 ◽  
Author(s):  
António Cardoso Marques ◽  
Diogo A. Pereira ◽  
José A. Fuinhas
Keyword(s):  
Renewable Energy ◽  
Fossil Fuel ◽  
Renewable Energy Sources ◽  
Energy Sources

Process of metal−organic framework (MOF)/covalent−organic framework (COF) hybrids-based derivatives and their applications on energy transfer and storage

Nanoscale ◽  
2022 ◽  
Author(s):  
Bingbing Cui ◽  
Guo-Dong Fu
Keyword(s):  
Renewable Energy ◽  
Energy Transfer ◽  
Fossil Fuel ◽  
Metal Organic Framework ◽  
Renewable Energy Sources ◽  
Environmental Issues ◽  
Energy Sources ◽  
Metal Organic ◽  
And Storage ◽  
Organic Framework

The fossil-fuel shortage and severe environmental issues have posed ever-increasing demands on clean and renewable energy sources, for which the exploration of electrocatalysts has been in a big challenge toward...

scholarly journals Solar and Wind Energy Based Microgrid : Study of Architecture's Potential at Coastal Areas in Bangladesh

2018 ◽  
Vol 17 (2) ◽  
pp. 31-36
Author(s):  
Abir Muhtadi ◽  
Ahmed Mortuza Saleque ◽  
Mohammad Abdul Mannan
Keyword(s):  
Renewable Energy ◽  
Wind Energy ◽  
Fossil Fuel ◽  
Renewable Energy Sources ◽  
Coastal Areas ◽  
Real Case ◽  
Extension Study ◽  
Energy Sources ◽  
Case Scenario ◽  
Geographical Locations

Due to sheer dependency upon fossil fuel sources, Bangladesh as a country is not free from numerous negative aspects. Country’s requirement for a certain portion of power be generated from renewable energy sources is due and required renewable energy target (RET) needs to be fulfilled. In this study, potential of distinguished coastal sites for entirely renewable energy such as solar and wind sources based microgrid for chosen community is explored. Microgrid architecture is appropriate considering the coastal areas’ geographical locations and due to the inconvenience in grid extension. Study suggests, potential of coastal sites are found to be feasible for such structures based on real case scenario data and modelled technical scheme.

The Use of Renewable Energies for Nigerian Agriculture: Progress, Prospects and Problems

1998 ◽  
Vol 27 (2) ◽  
pp. 129-132
Author(s):  
Bobboi Umar
Keyword(s):  
Renewable Energy ◽  
Rural Development ◽  
Agricultural Production ◽  
Fossil Fuel ◽  
Renewable Energy Sources ◽  
Renewable Energies ◽  
Energy Sources ◽  
Renewable Energy Technologies ◽  
Energy Technologies ◽  
Positive Results

Renewable energies have great potential to improve agricultural activities and rural development. Positive results are already being achieved with these relatively benign energies in many countries. In Nigeria, there is need to improve agricultural production for the increasing population and to conserve the fossil fuel reserves. Although renewable energy sources such as solar radiation and biomass are abundant, harnessing them for agricultural and rural development needs is very slow. This article extols the virtues of these energy sources, analyses the progress made so far in renewable energy technologies in Nigeria, identifies the major obstacles and suggests some solutions to overcome them.

scholarly journals Assessment of two different methods of calculating a heating demand

2019 ◽  
Vol 14 (2) ◽  
pp. 51-60
Author(s):  
Peter Turcsányi ◽  
Anna Sedláková
Keyword(s):  
Renewable Energy ◽  
Total Energy ◽  
Construction Industry ◽  
Performance Optimization ◽  
Fossil Fuel ◽  
Renewable Energy Sources ◽  
Energy Performance ◽  
Simulation Software ◽  
National Standards ◽  
Energy Sources

AbstractPhenomenon of today′s era is lowering overall energy performance and greenhouse gas emissions. European Union and its members came from an “uncontrollable” fossil fuel usage to an era of dependence reduction from fossil fuel usage. EU industry is now in era of utilizing renewable energy sources. Construction industry is responsible for 40% of total energy performance of EU; hence the great emphasis on energy effective design on new buildings as well as importance on energy effective renovation of already constructed buildings. Effort on lowering total energy performance in construction industry has signed on research on new project solutions, new insulation materials and new building services technologies which are maximizing energy gain from renewable energy sources. Simulation software and different engines are more than helpful tool when predicting building thermal behaviour. That is why simulation software is used more often in the process of designing energy efficient buildings or in the process of energy performance optimization of existing buildings. simulation and analytics itself, is dealing with simulation of chosen buildings (family houses) on heating demand based on the newest knowledge of constructions and materials. Results of heating demands of different family houses were confronted against heating demands calculated according national standards – using non-variable conditions. Next, the differences between two calculation approaches were characterized in percentages.

scholarly journals A Methodology for the Estimation of the Wind Generator Economic Efficiency

2017 ◽  
Vol 54 (6) ◽  
pp. 21-31
Author(s):  
G. Zaleskis
Keyword(s):  
Renewable Energy ◽  
Wind Turbine ◽  
Economic Efficiency ◽  
Power Supply ◽  
Fossil Fuel ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Environmental Load ◽  
Fuel Delivery ◽  
Technological Base

Abstract Integration of renewable energy sources and the improvement of the technological base may not only reduce the consumption of fossil fuel and environmental load, but also ensure the power supply in regions with difficult fuel delivery or power failures. The main goal of the research is to develop the methodology of evaluation of the wind turbine economic efficiency. The research has demonstrated that the electricity produced from renewable sources may be much more expensive than the electricity purchased from the conventional grid.

A Study on Sustainable Energy Sources and its Conversion Systems Towards Development of an Efficient Zero Pollution Novel Air Turbine to Use as Prime-Mover to the Light Vehicle

2008 ◽  
Author(s):  
Bharat Raj Singh ◽  
Onkar Singh
Keyword(s):  
Renewable Energy ◽  
Fossil Fuel ◽  
Renewable Energy Sources ◽  
Hydrocarbon Fuel ◽  
Direct Conversion ◽  
Energy Resources ◽  
Energy Sources ◽  
Prime Mover ◽  
Renewable Energy Resources ◽  
Air Turbine

Greater use of hydrocarbon fuel has led to fast depletion of fossil fuel reserves. This has now become worldwide problem making civilization vulnerable due to paucity of fuel in future. It is also a fact that as civilization is growing the use of transport has become essential part of life. The use of large number of vehicles for transport is contributing to about 70% of total air pollution, creating environmental & ecological imbalances. About 100–150 years old transport technology is totally based on combustions causing higher rate of emission, ultimately depleting the thickness of Ozone layer and causing the global warming. Thus worldwide fast depletion of conventional energy resources necessitates the search of alternatives such as Non-Conventional Energy Sources, Renewable Energy Sources and other Direct Conversion of Energy Sources. This paper deals with study on potential of renewable energy resources and their conversion system with emphasis on development of zero pollution engine for vehicles which may lead to sustainable future.

scholarly journals Multicriteria assessment of renewable energy sources in Serbia

Tehnika ◽  
2021 ◽  
Vol 76 (3) ◽  
pp. 379-385
Author(s):  
Bojan Stojčetović ◽  
Milan Mišić ◽  
Aleksandar Đorđević
Keyword(s):  
Climate Change ◽  
Renewable Energy ◽  
Fossil Fuel ◽  
Renewable Energy Sources ◽  
Multicriteria Decision Making ◽  
Energy Sources ◽  
Potential Solution ◽  
Analytical Hierarchical Process ◽  
Energy Projects ◽  
Multicriteria Assessment

The development of today's economies is inconceivable without energy. However, fossil fuel reserves are declining, climate change is accelerating and some changes in the energy sector are needed. Renewable energy sources are a potential solution for many scientists and practitioners. However, the planning and implementation of renewable energy projects requires consideration of a number of criteria, which is why multicriteria decision-making methods are often used to evaluate renewable energy sources/technologies. Goal of this paper is to evaluate four types of renewable energy sources (photovoltaic, hydro, biomass and wind energy) in Serbia. Analytical hierarchical process and seven criteria were applied. Based on the obtained results, hydro sources are ranked the best. Also, a sensitivity analysis was conducted to determine whether changes in the priority of criteria would cause changes in the range of alternatives. It was found that major changes in priorities are needed for changes to occur, so it can be concluded that the results obtained are relevant.

Transitioning to Renewable Sources of Electricity: Motivations, Policy, and Potential

2014 ◽  
Author(s):  
Chelsea Schelly
Keyword(s):  
Renewable Energy ◽  
Carbon Dioxide Emissions ◽  
Fossil Fuels ◽  
Fossil Fuel ◽  
Renewable Energy Sources ◽  
Good News ◽  
Energy Sources ◽  
Renewable Sources ◽  
Transmission Grid ◽  
Electricity Infrastructure

The electricity grid in the United States may be the largest, most pervasive technological system ever constructed to meet the needs and comforts of human beings (Nye 1997). Although it is less than 150 years old, the electricity infrastructure of this nation is ubiquitous; power lines stretch across deserts, forests, states, highways, and the entire nation in order to provide electricity to residences, businesses, and communities. The electricity carried by these transmission lines is generally produced using fossil fuels (mostly coal; see US Energy Information Administration 2012) and is most commonly generated at a monstrously large facility (a coal plant, a nuclear facility, or a hydropower dam). Our electricity infrastructure was constructed to carry enormous amounts of electricity across vast geographical expanses, based on the massive generation facilities and concentrated fossil fuel based energy sources that defined the system and its use. However, there are increasing concerns regarding the sources of our energy supply. Many of these concerns are related to climate change and how carbon dioxide emissions from burning fossil fuels contribute to rising global temperatures and the climate instability of the planet (Brown 2003). Additional concerns include the host of other environmental damages caused by the use of coal (Epstein et al. 2011), nuclear energy (Slovic et al. 1991), and hydro-electricity (Dincer 1998); other debates involve worries about nearing or reaching peak energy supplies (Brown 2003), energy security (Yergin 2006), and the aging transmission grid (Amin 2003). For a multitude of reasons, many would agree that it’s time to rethink our dependence on fossil fuel based forms of energy and move toward alternative, renewable energy sources (Brown 2003, pp. 116–135). The good news is, the renewable energy industry gets bigger every year, with more energy from renewable sources being produced, sold, and used (Sherwood 2011). Some US states have enacted renewable energy standards requiring that a certain percentage of their electricity supply come from renewable sources. Tax incentives, subsidies, and various forms of rebates, in financially incentivizing renewable energy adoption, also provide evidence that we are indeed moving in the direction of clean, renewable sources of energy.

Net Energy for Concentrated Solar Power in Chile

2008 ◽  
Author(s):  
Rodrigo Escobar ◽  
Teresita Larrain
Keyword(s):  
Energy Source ◽  
Renewable Energy ◽  
Solar Energy ◽  
Fossil Fuel ◽  
Energy Analysis ◽  
Renewable Energy Sources ◽  
Continuous Operation ◽  
Energy Sources ◽  
Net Energy ◽  
Concentrated Solar Power

The Chilean Energy Policy calls for 15 percent of new power generation capacity to come from renewable energy sources from 2006 to 2010, and then a 5% of electric energy generated from renewable energy sources with gradual increases in order to reach 10% by 2024. Neither the government nor the power generation sector plans mention solar energy to be part of the renewable energy initiative. Part of this apparent lack of interest in solar energy might be due to the absence of a valid solar energy database, adequate for energy system planning activities. Monthly means of solar radiation are used in order to estimate the solar fraction for a 100 MW plant for four given locations. Our analysis considers two cases: operation during sunlight hours, and continuous operation during 24 hours a day. A net energy analysis for concentrated solar power (CSP) plants in Chile is then performed, considering the energy costs of manufacturing, transport, installation, operation and decommissioning. The results indicate that the CSP plants are a net energy source in three of the four locations, when operating in sunlight-only mode. This is due to the lower radiation levels available at that location, which implies a high fossil fuel back-up fraction. In the continuous operation mode, the CSP plants become fossil fuel plants with solar assistance, and therefore all locations display negative net energy. Based on this result, the back-up fraction required for the plants to be net energy sources is estimated from the EROEI as function of the back-up fraction. It is estimated that the net energy analysis is a useful tool for determining under which conditions a CSP plant becomes a net energy source, and thus can be utilized in order to define geographical locations and operation conditions where they can be considered renewable energy sources.

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