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Search Results: 1 - 10 of 18607 matches for " energy efficiency "
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Happiness as Surplus or Freely Available Energy  [PDF]
Matthew T. Gailliot
Psychology (PSYCH) , 2012, DOI: 10.4236/psych.2012.39107
Abstract: This paper presents a literature review that indicate happiness as a state of freely available or surplus energy. Happiness is associated with good metabolism and glucose levels, fewer demands (from parenting, work, difficult social relationships, or personal threats), and goal achievement, as well as increased ease of processing, mental resources, social support, and monetary wealth. Each of these either provide or help conserve energy.
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

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.
An Energy Efficient Color Based Topology Control Algorithm for Wireless Sensor Networks  [PDF]
Muhammad Asghar Khan, Asfandyar Khan, Said Khalid Shah, Azween Abdullah
Wireless Sensor Network (WSN) , 2013, DOI: 10.4236/wsn.2013.51001

Wireless Sensor Networks (WSNs) are universally being used and deployed to monitor the surrounding physical environments and detail events of interest. In wireless Sensor Networks energy is one of the primary issues and requires energy conservation of the sensor nodes, so that network lifetime can be maximized. To minimize the energy loss in dense WSNs a Color Based Topology Control (CBTC) algorithm is introduced and implemented in Visual Studio 6.0. The results are compared with Traditional dense WSNs. In the evaluation process it was observed that the numbers of CPU ticks required in traditional WSNs are much more than that’s of CBTC Algorithm, both in Normal and Random deployments. So by using CBTC, delay in network can be minimized. Using CBTC algorithm, the energy conservation and removal of coverage holes was also achieved in the present study.

Energy Efficiency and Conservation Economies  [PDF]
Dmitriy Evgenevich Sklyarov, Evgeny Fedorovich Kustov, Valery Konstantinovich Lozenko
iBusiness (IB) , 2015, DOI: 10.4236/ib.2015.72012
Abstract: Economic systems exist under the condition of receipt and expenditure of energy. Energy consumption is a necessary condition for the existence and functioning of any scale economic systems: macroeconomics, microeconomics, economic regions, or the world economy. However, the energy conditions of existence of economic systems differ from these conditions for other systems. So biological systems are dissipative systems, which exist under condition of energy consumption and expenditure. Economic system exists not only because of energy consumption, but also because of energy production.
Indicators of Energy Efficiency in Buildings. Comparison with Standards in Force in Argentina  [PDF]
María Belén Salvetti, Jorge Czajkowski, Analía Fernanda Gómez
Open Journal of Energy Efficiency (OJEE) , 2013, DOI: 10.4236/ojee.2013.24021

In this work we make a comparative study of the energy behaviour in different building types. We analyze three cases of office buildings and three residential buildings, and compare them with a previous sample. We seek to find correlations or differences in behavior in terms of potential energy losses and gains, and UL values compared with Argentinian Standards to verify the degree of efficiency. For energy analysis we used a software which allows the analysis of thermal and energy building performance at steady state on a monthly basis. This software is called EnergoCAD and it also determines formal indicators based on IRAM standards. We conclude that the indicators used are clear to energetically grade buildings and to facilitate comparisons. In turn, smaller buildings are relatively less energy efficient than larger ones. At the same time it is noteworthy that the energy inefficiency has been growing rapidly over the years. Finally it is noted that none of the cases analyzed meets the National Standards.

A Review of Building Energy Efficiency Technology  [PDF]
Ronglan Zhang
Open Journal of Civil Engineering (OJCE) , 2015, DOI: 10.4236/ojce.2015.54035
Abstract: In China, there’s high energy consumption in buildings with less attention to building energy efficiency. All of these facts prove that there are great potentialities in energy conservation. On account of this, this paper introduces multiple building energy-saving technologies at home and abroad, including the technologies for innovative wall materials, exterior wall external insulation, heat insulation of window, utilization of solar energy, heat storage and recovery as well as the illumination energy saving technology. On the basis of new buildings, this paper gives five suggestions on building energy efficiency. Meanwhile it raises five suggestions on energy conservation based on the existing building, for which it presents purposely the technologies and measures about energy saving transformation from four aspects.
An Approach to Energy Saving and Cost of Energy Reduction Using an Improved Efficient Technology  [PDF]
Abubakar Kabir Aliyu, Abba Lawan Bukar, Jamilu Garba Ringim, Abubakar Musa
Open Journal of Energy Efficiency (OJEE) , 2015, DOI: 10.4236/ojee.2015.44007

The electricity consumption in commercial places like universities has tremendously increased recently. Modern and advanced energy efficient appliances are highly needed to substitute the conventional ones. Energy saving is of great important instead of its wastage, as utilizing the energy efficiently reduces the cost of energy. Energy consumption varies for commercial building due to several factors such as electrical appliance usage, electrical appliance type, management, etc. Due to the advancement in technology, there are new emergence appliances that are of high efficiency and have less energy consumption. A case study is conducted on selected five tutorial rooms, level 4 buildings in the Faculty of Electrical Engineering 19 A, Universiti Teknologi Malaysia. The paper proposes new emergence equipments with high efficiency and less power consumption to replace the existing ones. A survey is conducted on the number of electrical appliances used for each of the tutorial rooms, time table for each tutorial room and the Tenaga Nasional Berhad pricing and tariff are taken into consideration in the analysis of the energy consumption and the cost of energy. This paper aims at reducing the amount of energy consumption by replacing the existing electrical equipments with high efficient electrical equipments; it also tends to reduce the cost of energy paid to the utility. By observing the results, it shows that the proposed efficient electrical equipments are more efficient, less power consumption and less cost compared to the existing electrical equipments.

Energy Audit of a Brewery—A Case Study of Vitamalt Nig. Plc, Agbara  [PDF]
Olugbenga Olanrewaju Noah, Albert Imuentinyan Obanor, Mohammed Luqman Audu
Energy and Power Engineering (EPE) , 2012, DOI: 10.4236/epe.2012.43019
Abstract: The efficient use of energy is of prime importance in all sector of the economy. Energy cost is a significant factor in economic activity on par with factors of production like capital, land and labor [1]. The imperative of an energy shortage situation calls for energy conservation measure, which essentially means using less energy for the same level of activity. A comprehensive energy audit of Vitamalt Nigeria Plc, Agbara was carried out using portable thermal and electrical instruments with the objective of studying the present pattern of energy consumption and identifying the possibilities of saving energy in the plant. Collected, was a five year (2000-2004) data on energy consumption of Vitamalt Nig. Plc. The data were evaluated and analyzed to determine the present energy performance level of the firm. A complete energy balance of the factory was carried out to relate energy input, conversion efficiency with production output in order to identify areas of energy wastages/losses and savings that can be achieved. Energy performance parameters such as Energy intensity, Energy productivity and Normalized performance indicator (NPI) were used as a measure of assessing the energy performance of the plant. The NPI calculated over the span of five years gave an average of 1.2 GJ/m2 indicating a FAIR range in energy performance level classification (1.0 - 1.2) while significant savings and improvement in energy usage is achievable. Maximizing efficiency of existing system, optimizing energy input requirement and significant capital investment in procuring new energy conserving equipment must be made for the energy performance level to fall into a good range classification (less than 0.8).
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