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Search Results: 1 - 10 of 12999 matches for " Energy "
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Energy Analysis and Proposals for Sustainability from the Energy Transition  [PDF]
Eduardo Oliveira Teles, Marcelo Santana Silva, Francisco Gaudêncio M. Freires, Ednildo Andrade Torres
Low Carbon Economy (LCE) , 2015, DOI: 10.4236/lce.2015.62004
Abstract: The energy transition has become an increasingly attractive and necessary issue nowadays because of the tendency of scarcity and increased demand for fossil energy, and associated environmental impacts—for example, increased emission of greenhouse gases (GHGs), particularly CO2, CH4 and N2O. From the study of several papers and reports from various international agencies like the World Energy Council (WEC), the International Energy Agency (IEA), the Policy Network for Renewable Energy (REN) and the World Organization of the United Nations (UN), this paper analyzes the global energy context, making a survey of what is being discussed under the theme “energy transition”, and suggests ways to reduce the consumption of fossil fuels, aiming at sustainability.
Challenges of Energy Security to the Industrialisation and Sustainable Development in Vietnam  [PDF]
Nguyen Tan Phat
Technology and Investment (TI) , 2012, DOI: 10.4236/ti.2012.33024
Abstract: Vietnam, during the industrialisation, has been facing the problem of energy security, the manifestation of which is lack of electricity on a large scale, affecting the growth of production and people’s lives. In the past years, the fact that energy development has depended mainly on hydroelectricity and thermo-electricity but taken little care of clean energy has been opening up problems related to environment and sustainable development. Thus, at the same time, Energy Branch has to tackle 2 issues. The first is meeting the demand of energy for industrialization and social-economic growth. The second is developing sustainable energy, particularly safe and renewable power.
Wind-Solar Hybrid Electrical Power Production to Support National Grid: Case Study - Jordan  [PDF]
Ghassan HALASA, Johnson A. ASUMADU
Energy and Power Engineering (EPE) , 2009, DOI: 10.4236/epe.2009.12011
Abstract: The paper presents the next generation of power energy systems using solar- and wind-energy systems for the country of Jordan. Presently with the oil prices are on the rise, the cost of electrical power production is very high. The opportunity of a large wind and solar hybrid power production is being explored. Sights are chosen to produce electricity using the wind in the Mountains in Northern Jordan and the sun in the Eastern Desert. It is found that the cost of windmill farm to produce 100 - 150 MW is US$290 million while solar power station to produce 100 MW costs US$560 million. The electrical power costs US$0.02/kWh for the wind power and US$0.077 for the solar power. The feasibility for using wind and solar energies is now when the price oil reaches US$ 100.00 per barrel. The paper also discusses different power electronics circuits and control methods to link the renewable energy to the national grid. This paper also looks at some of the modern power electronics converters and electrical generators, which have improved significantly solar and wind energy technologies.
Energy Efficiency and Rebound Effect: Does Energy Efficiency Save Energy?  [PDF]
Abdulkadir Bulu?, Nurgün Topalli
Energy and Power Engineering (EPE) , 2011, DOI: 10.4236/epe.2011.33045
Abstract: The aim of this study is to examine the theoric and empirical literature about “rebound effect”. This study summarizes energy efficiency policy and programs in general and in Turkey. Also it gives defination of the “rebound effect” concept. The rebound effect is related to consumer’s tendency to consume more energy due to economic benefit from efficiency improvement. The ‘rebound effect’ is the focus of a long-running dispute of energy economics but it is very new concept in the most developing countries. In literature according to some economist gains in energy efficiency will also reduce the real per unit price of energy services and hence the consumption of energy will rise and partially offset the initial reduction in the usage of energy sources. However for others size of the rebound effect is too small to take attention. The empirical literature shows that the size of rebound effect can change from country to country and sector to sector.
Strategies for Energy Efficiency Improvement in Zimbabwean Industries Using the Energy Audit  [PDF]
Wilson Mungwena, Cosmas Rashama
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.55038
Abstract:

Energy efficiency is a modern approach for using energy resources economically. Energy audit ensures that every unit of energy gives the maximum in terms of production. This paper brings out the advantages of using energy audit to save future installation of power generation capacity and load reduction of distribution systems. It also envisages the introduction of energy conservation techniques to eliminate sub-standard equipment.

Energy and Population Policies in Australia  [PDF]
Doug Hargreaves
Open Journal of Energy Efficiency (OJEE) , 2013, DOI: 10.4236/ojee.2013.21001
Abstract: The Australian Government is about to release Australia’s first sustainable population policy. Sustainable population growth, among other things, implies sustainable energy demand. Current modelling of future energy demand both in Australia and by agencies such as the International Energy Agency sees population growth as one of the key drivers of energy demand. Simply increasing the demand for energy in response to population policy is sustainable only if there is a radical restructuring of the energy system away from energy sources associated with environmental degradation towards one more reliant on renewable fuels and less reliant on fossil fuels. Energy policy can also address the present nexus between energy consumption per person and population growth through an aggressive energy efficiency policy. This paper considers the link between population policies and energy policies and considers how the overall goal of sustainability can be achieved. The methods applied in this analysis draw on the literature of sustainable development to develop elements of an energy planning framework to support a sustainable population policy. Rather than simply accept that energy demand is a function of population increase moderated by an assumed rate of energy efficiency improvement, the focus is on considering what rate of energy efficiency improvement is necessary to significantly reduce the standard connections between population growth and growth in energy demand and what policies are necessary to achieve this situation. Energy efficiency policies can only moderate unsustainable aspects of energy demand and other policies are essential to restructure existing energy systems into on-going sustainable forms. Policies to achieve these objectives are considered. This analysis shows that energy policy, population policy and sustainable development policies are closely integrated. Present policy and planning agencies do not reflect this integration and energy and population policies in Australia have largely developed independently and whether the outcome is sustainable is largely a matter of chance. A genuinely sustainable population policy recognises the inter-dependence between population and energy policies and it is essential that this is reflected in integrated policy and planning agencies.
Regional Energy Balance and Its Implementation to South Karelia  [PDF]
Mika Laihanen, Antti Karhunen, Tapio Ranta
Journal of Sustainable Bioenergy Systems (JSBS) , 2011, DOI: 10.4236/jsbs.2011.11001
Abstract: All EU countries have targets for increasing the use of renewable energy at a national level. However this effort should become concrete at regional and local levels where investments on bioenergy are made. This study introduces a systematical and universally applicable method for constructing regional energy balance. This study focuses on the method how to combine specific regional primary energy sources with their end uses. The primary energy sources include different fuels and the net import of electricity. The energy end uses are heat, electricity and losses. The concept of the regional energy balance was illustrated through a case of South Karelia. The total use of primary energy in South Karelia was 25.2 TWh (or 91 PJ) in 2010 and the share of renewable energy sources was 65%. The regional energy balance analysis can be utilized as a guideline for strategically planning and allocating regional energy sources for example, increasing the use of renewable energy sources. It can provide local decision makers and shareholders about the current status of energy supply, convincing them to take proper actions and consider producing energy at a local and regional level.
Relaxation of Energy and Momentum in an Carrier-Phonon System  [PDF]
A. Rossani
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.38103
Abstract: If electrons (e) and holes (h) in metals or semiconductors are heated to the temperatures Te and Th greater than the lattice temperature Tp, the electron-phonon interaction causes energy relaxation. In the non-uniform case a momentum relaxation occurs as well. In view of such an application, a new model, based on an asymptotic procedure for solving the generalized kinetic equations of carriers and phonons is proposed, which gives naturally the displaced Maxwellian at the leading order. After that, balance equations for the electron number, hole number, energy densities, and momentum densities are constructed, which constitute now a system of five equations for the electron chemical potential, the temperatures and the drift velocities. In the drift-diffusion approximation the constitutive laws are derived and the Onsager relations recovered.
An Overview of the Energy Sector in Malawi  [PDF]
Gregory E. T. Gamula, Liu Hui, Wuyuan Peng
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.51002
Abstract:

This paper presents the status of the energy sector in Malawi which is not effectively contributing to the national economic development because it is unreliable and insufficient hence not able to meet the energy demand. About 83% of Malawi’s population live in rural areas and rely on fuel wood for energy supply. High reliance on biomass has had negative environmental impacts through indoor pollution, deforestation, soil erosion leading to high soil sediment loads to water bodies resulting in poor water quality in rivers and lakes. Electricity supply is much less than demand resulting in deficient and unreliable supply. Malawi is endowed with a number of renewable energy resources yet utilization of these resources is still a major challenge. Little progress has been made in improving the energy supply situation due to a number of reasons, main ones being poverty, lack of political will and wrong approaches in addressing the energy problem. Most current approaches aim at improving the current situation but our opinion would be to develop new strategies to shift the energy situation from its present condition to the desired status. The paper starts with an introduction, then status of the energy sector, then goes on to discuss energy development efforts according to sectors and finally gives a conclusion.

Overview on the Distribution System of Mineral Energy Ownership in China  [PDF]
Weijia Zhang
Open Journal of Social Sciences (JSS) , 2014, DOI: 10.4236/jss.2014.29027
Abstract:

This paper is a preliminary exploration on the attribution system of mineral energy ownership of China. In this article, mineral energy is broken down into two categories, namely, the energy minerals and the products of energy minerals. Subsequently, this paper further elaborates and makes a pectination to the energy ownership system according to the mode of acquisition of the two types of mineral energy in China.

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