摘要 :
This study investigates the use of Smart Energy Monitors (SEMs) technology which has been introduced to help electricity consumers conserve energy and to ensure energy efficiency among residents in Ashongman, a suburb of Accra. Gh...
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This study investigates the use of Smart Energy Monitors (SEMs) technology which has been introduced to help electricity consumers conserve energy and to ensure energy efficiency among residents in Ashongman, a suburb of Accra. Ghana as a developing country has gone through an energy crisis recently. There has been a shortfall of electricity generation capacity where demand has exceeded supply, which resulted in load shedding management. This study seeks to find out the energy conservation habits among Ghanaian residents at Ashongman and also to investigate the use of SEMs for energy conservation. The findings of the study showed 16% of respondents were aware of the benefits of SEMs in electricity conservation whilst 84% did not know. 72.7% of the respondents who were aware of SMEs have used it whilst 27.3% of respondents who aware of SEMs have not used it for energy conservation purposes. The findings also further indicated the challenges respondents face in conserving energy in their homes and the measures that need to be put in place to ensure energy efficiency. On the basis of the findings, it is recommended for the Energy Commission and Electricity Company of Ghana that, there should be effective policy to educate consumers on adapting SEMs technology for energy conservation.
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Global energy consumption in the last half century has rapidly increased and is expected to continue to grow over the next 50 years, however, with significant differences. The past increase was stimulated by relatively "cheap" fos...
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Global energy consumption in the last half century has rapidly increased and is expected to continue to grow over the next 50 years, however, with significant differences. The past increase was stimulated by relatively "cheap" fossil fuels and increased rates of industrialization in North America, Europe and Japan; yet while energy consumption in these countries continues to increase, additional factors make the picture for the next 50 years more complex. These additional complicating factors include China and India's rapid increase in energy use as they represent about a third of the world's population; the expected depletion of oil resources in the near future; and, the effect of human activities on global climate change. On the positive side, the renewable energy (RE) technologies of wind, bio-fuels, solar thermal and photovoltaics (PV) are finally showing maturity and the ultimate promise of cost competitiveness.
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TONGCHUAN is resource-based sustainable development pilot city, a demonstration city of energy conservation and emission reduction fiscal policy, and a demonstration area of national ecological protection and restoration projects....
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TONGCHUAN is resource-based sustainable development pilot city, a demonstration city of energy conservation and emission reduction fiscal policy, and a demonstration area of national ecological protection and restoration projects. In recent years, Tongchuan has been successfully established as a national model city of green development and a promoter of good public health. It was ranked the happiest city in China for two consecutive years in 2017 and 2018.
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Past research has shown that occupancy information can be used to reduce building energy consumption through occupant-based controls and by mitigating wasteful occupant behavior.In this study,we investigate the dynamic relationshi...
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Past research has shown that occupancy information can be used to reduce building energy consumption through occupant-based controls and by mitigating wasteful occupant behavior.In this study,we investigate the dynamic relationship between WiFi connection counts(as a proxy to occupancy)and building electricity consumption across four building typologies(office,lab,health center,and library).Our findings based on one year of data show a strong positive linear correlation between electricity consumption and WiFi count across all four building when the building is in operation.The data exploration also indicates higher interactions between occupants with the plug and lighting loads in office and lab space types as compared to in a health center and a library.Next,using principal component analysis(PCA)for feature extraction followed by Density-based spatial clustering of applications with noise(DBSCAN),we show that distinct clusters could be generated,characterized by an increase in the between-cluster variance and smaller within-cluster variation.Lastly,we apply linear regression to manifest how the clustering results can be used to better model the variables.
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The accumulated negative temperature,the first heating date,the last heating date,heating duration,collective heating area and energy consumption for winter heating in Xi'an during 1986-2002 were comprehensively analyzed.The resul...
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The accumulated negative temperature,the first heating date,the last heating date,heating duration,collective heating area and energy consumption for winter heating in Xi'an during 1986-2002 were comprehensively analyzed.The results show that under the global warming,winter in Xi'an became warmer and heating duration shone,With the development of economy,the area and energy consumption for collective heating increased continually.In the meantime,the energy consumption per unit area for winter heating decreased year by year,but it did not match the winter temperature well because the energy was not proportionally consumed according to the change of temperature.In order to conserve energy effectively,heating in winter should be timely adjusted according to actual temperature change.
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At present,the increasing consumption of electrical energy is accompanied by the increasing pressure on natural environment,excessive discharge of waste gas,and accelerated rate of global warming.Photovoltaic new energy plays an i...
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At present,the increasing consumption of electrical energy is accompanied by the increasing pressure on natural environment,excessive discharge of waste gas,and accelerated rate of global warming.Photovoltaic new energy plays an important role in reducing costs and improving resource utilization.The leading power industries should come up with new designs of equipment that is in line with the green concept,improve the utilization of photovoltaic energy,and realize sustainable economic development.In view of this,this paper mainly analyzes the application of photovoltaic new energy in electrical energy conservation.
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A new completely energy-conserving semi-Lagrangian scheme is constructed. The numerical solution of shallow water equation shows that this conservative scheme preserves the total energy in twelve significant digits, while the trad...
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A new completely energy-conserving semi-Lagrangian scheme is constructed. The numerical solution of shallow water equation shows that this conservative scheme preserves the total energy in twelve significant digits, while the traditional scheme does only in five significant digits.
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This work attempts to investigate some practical measures that may reduce severe power outages that lead to energy curtailments. The first step of this attempt is to explore, from the consumer’s perspective, the adverse effects o...
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This work attempts to investigate some practical measures that may reduce severe power outages that lead to energy curtailments. The first step of this attempt is to explore, from the consumer’s perspective, the adverse effects of the energy curtailments that reflect enormous damages (tangible and intangible) to the residential sector in the city of Riyadh (the capital of the Kingdom of Saudi Arabia). The second step is to propose, analyze, and employ energy conservation strategies that lead to both energy conservation and costs savings. The study results show that some customers will suffer enormous tangible and intangible losses should these outages occur during specific times, seasons, and for prolonged durations. In order to reduce these power outages and hence mitigate their adverse effects and consequences, the study proposes proper practical measures and solutions without compromising the consumers’ needs, satisfaction, and convenience.
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A wireless sensor network consists of hundreds or thousands of small nodes which could either have a static or dynamic position. These nodes are deployed through normal or random distribution to report events of a particular area ...
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A wireless sensor network consists of hundreds or thousands of small nodes which could either have a static or dynamic position. These nodes are deployed through normal or random distribution to report events of a particular area to the base station through sink nodes. Having limited onboard energy of sensor nodes, conservation of energy in wireless sensor network is necessary. For this purpose, a new algorithm is proposed titled Energy-Efficient-Direction-Based-Topology-Control-Algorithm (EEDBTC). In proposed algorithm, direction is the main concern whenever an event occurs the node will send data in the direction of base station so that less energy is consumed. The results of the same were compared with customary dense wireless sensor network, color based WSNs and it was observed that this algorithm is much better than previous topology control algorithms used.
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Given the increasing dependence of development on energy consumption, an understanding of the rules and trends of national energy consumption is required for boosting social energy conservation. By using two models -- the structur...
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Given the increasing dependence of development on energy consumption, an understanding of the rules and trends of national energy consumption is required for boosting social energy conservation. By using two models -- the structural evolution energy consumption model and the structural evolution per-unit energy consumption model, this article attempts to make an international comparison of the industrial structure development versus energy consumption patterns in the United States, the United Kingdom, France, Germany, Japan, and India. The results of this analysis indicate that the dominance of secondary industry over the industrial structure evolution process noticeably accelerates national energy consumption at the initial stage of modernization. Subsequently, a slowdown in energy consumption as a result of industrial structure development yields effects as the diversification process speeds up. Under such influence, energy consumption per unit of GDP follows an inverted U-shaped curve from rise to decline. As one of the world’s major energy producers and consumers, China has long employed a one- sided sector development policy. Under the influence of this policy, national energy conservation endeavors have been inhibited by the rigidity in its industry structural evolution. Thus, in China, energy consumption per unit of GDP has remained at a high level.
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