首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 15 毫秒
1.
    
Increasing deployment of cellular networks across the globe is pushing the energy consumption in cellular networks at an exceptional rate. The integration of renewable energy (RE) harvesting technology into future mobile networks has the potential to positively cope with environmental contamination and ensure self-energy sustainability as a means to decrease fossil fuel consumption. Diesel generator (DG) in conjunction with on-site RE harvester has emerged as an economic and extent efficient option where commercial grid supply is not viable. This paper is focused on the cost aware energy management framework addressing to least net present cost (NPC) for the envisioned hybrid powered green cellular base stations (BSs) considering tempo-spatial traffic dynamics. In such wireless networks, solar photovoltaic modules are considered as a primary energy source, while the DG and energy storage device are kept as the standby supply in case of inadequate solar energy to ensure zero outage. A comprehensive simulation-based investigation is carried out in the context of downlink Long-Term Evolution (LTE) cellular networks for evaluating cost-efficiency and reliability performance under a wide range of network settings. Particularly, this paper examines the energy yield, greenhouse gas emissions, and cost analysis based on the optimal architecture of Remote Radio Head-enabled LTE BS. Moreover, wireless network performance in terms of throughput, energy efficiency gain, and radio efficiency is thoroughly investigated using Monte Carlo simulations. Numerical results demonstrate a substantial reduction of carbon footprints with minimum NPC while satisfying the quality of service requirements.  相似文献   

2.
    
Climate change and energy security are global challenges requiring concerted attention and action by all of the world’s countries. Under these conditions, energy supplier and exporter countries in the Middle East region are experiencing further challenges, such as increasing domestic energy demand while energy exports have to concurrently be kept at high levels. Middle East countries process the largest proven oil and gas reserves in the world and contribute a large fraction of the world’s CO2 emissions from the use of these as fuels both domestically and internationally. This paper addresses different policies that could dramatically change the future course of the Middle East region toward a zero CO2 emission energy system. To this aim, an integrated energy supply–demand model has been developed to analyze required commitments including renewable energy and energy efficiency targets and the potential of nuclear power, all of which should need to be considered in order to reduce CO2 emissions by 2100. The results indicate that nearly 43% of the global energy of the Middle East region can be supplied from non-fossil fuel resources in 2100.  相似文献   

3.
There have been conflicting accounts of the role and influence of local opposition within planning application outcomes for wind power developments. There is an expanding literature that considers public responses to proposed renewable energy developments and much of this suggests that public opposition is a key factor in the slow growth in renewable energy capacity. However, this paper will show that local opposition groups' power over such planning processes is very limited, and in fact extends only so far as delaying an outcome. Through a thematic content analysis of objection letters to one particular proposed wind power development, the key issues raised in connection with the development will be highlighted. Subsequently, these issues will be compared with those discussed in the official report of the planning appeals process, and it will be shown that the concerns of local objectors had little influence over the eventual verdict.  相似文献   

4.
    
ABSTRACT: This paper reports on the development of a mathematical model for forecasting energy development in the Yellowstone study area for the years 1985 and 2000, and determining the associated economic demands for water, land, labor, capital, and mineral resources. The study was prepared for use by the Missouri River Basin Commission in conducting a comprehensive, “Level B” planning study of the water and related land resources in the Yellowstone River Basin. The study results indicate that the amount of coal development in the Yellowstone study area will depend primarily upon state and federal energy policies and regulations. Policies related to slurry pipeline transportation of coal will be particularly important in determining the level and pattern of future energy development in the area. Coal production under the “most probable” scenario is expected to increase from about 40 million tons in 1976 to 163 million tons per year by 1985, and 513 million tons in the year 2000. Consumptive water use for energy development in the study area could be as much as 556,000 acre-feet per year by the year 2000 (under the high scenario). A parametric analysis was conducted on the 1985 most probably scenario to determine the influence on the study results of variations in the delivered price of water. Water requirements were reduced by nearly one-fourth as water costs increased from zero to over $750 per acre-foot.  相似文献   

5.
The support of financial markets for the transformation of the energy system to a low carbon society seems critical for its success. But will they support this transformation on the basis of market incentives alone? This study analyses how equity indices that try to capture renewable energy investments perform compared to conventional benchmark indices. Especially financial market investors—such as pension funds, insurance companies, and mutual funds—use these to assess and guide their renewable energy investments. As such, we take the perspective of financial market participants, which mainly only indirectly invest in renewable energy. We also analyze whether renewable energy indices are to be regarded as an example of market environmentalism. We find that the renewable energy indices’ risk-adjusted return is very poor and suggests renewables is not a financially attractive portfolio investment yet. We also argue that renewable energy equity indices can be regarded as an example of market environmentalism, especially with respect to commodification and frame-shifting.  相似文献   

6.
This article presents an assessment of Russia's energy sector, its current state and planned future direction. The analysis of Russia's energy trends is based on a set of indicators for sustainable energy development (ISED), developed under the leadership of the International Atomic Energy Agency (IAEA). The article discusses Russia's Energy Strategy to 2020, and outlines major developments and challenges of the country's energy system. Russia's energy priorities, captured in the Strategy to 2020, emphasize securing a stable and uninterrupted energy supply; reducing energy intensity and improving energy efficiency; developing the domestic energy resource base; reducing negative environmental impacts; and ensuring affordable energy for the poorer segments of the population. Energy needs and challenges are discussed in relation to the three aspects of sustainability as defined in Agenda 21: economic, social and environmental. Concerns are expressed regarding environmental repercussions of energy development, in particular since Russia's 1998 economic rebound. There are also concerns, despite the economic recovery, that anticipated increases in energy tariffs may exceed the affordability of poorer segments of the population.  相似文献   

7.
    
As provinces across Canada seek to diversify their domestic electricity supply and cope with the accelerating effects of anthropogenic climate change, new models of sustainability-focused economic development are being pursued. One critically important emerging paradigm involves First Nation (a Canadian term for indigenous) collaboration and leadership in renewable energy projects. In this comparative case study analysis, we consider two different governance approaches pursued in distinct renewable energy project contexts: the clean energy projects of the Ojibway Pic River First Nation band in northwestern Ontario and the NaiKun Offshore Wind Project proposed in the ocean territory of the Haida Nation off the coast of British Columbia (BC). Focusing on themes of participation and multi-level governance, the case studies highlight the importance of authority and control in decision processes, the primacy of ensuring that scale and quality of design are carefully scoped, and the shaping role of inclusiveness in planning for wholly sustainable energy futures. Taken together, these cases illustrate that fluid governance arrangements which exploit the particular capacities of each actor may give rise to trust that ultimately forms the foundation of a co-produced model of renewable energy governance. We argue that while collaboration might aim to be inclusive of all interested actors, it is important to consider the extent to which a project design might sufficiently incorporate a community's long-term vision. We conclude that truly sustainable renewable energy development requires a project design that reflects community values, incorporates community control, and incentivises indigenous ownership.  相似文献   

8.
    
In 1997 the European Commission presented a communication to clarify the link between environmental strategy and job creation, and the Kyoto Protocol was also negotiated during that year. While it may be considered that implementation of the protocol has contributed to environmental and socio-economic phases in the response to climate change, the method of accounting for carbon offsets is ambiguous and uncertain from the management viewpoint. In addition, from the planning viewpoint there is doubt as to how to realise a low-carbon society without any socio-economic burden. Since it is important to know the real value of carbon offsets when considering the environment for future generations, it is necessary to prepare a management tool to accurately account for carbon offsets. The identification of the effects of climate change will be a key to properly planning global-scale projects, and financial options will depend upon how greenhouse gases are categorised (pollution or a global warming threat). Categorisation should therefore be considered carefully.  相似文献   

9.
    
Conflict around wind farm development has stimulated interest in ‘community benefits’ – the provision of financial or material benefits by the developers to the area affected by these facilities. By and large, both policy makers and researchers have couched the rationale for community benefits in instrumental terms, i.e. that an increased flow of community benefits will improve the social acceptability of these facilities and thereby expedite planning consent. This paper questions this conventional rationale. Proponents of this rationale neglect the institutionally structured terrain of the planning process; the provision of community benefits can shift in significance depending on whether or not the ‘affected community’ has any significant influence over wind farm projects. Similarly, our discourse analysis conducted in Wales shows that community benefits are seen predominantly as compensation for impacts, without any clear implication that they should change social attitudes. Our conclusion is that the dominant, instrumental rationale for community benefits obscures other, equally important justifications: the role of community benefits in promoting environmental justice; and how flows of community benefits might better serve the long-term sustainability of wind farm development areas.  相似文献   

10.
    
The planning of renewable energy infrastructure has proven highly controversial across many countries. We critically examine the lessons that can be learned from research investigating the causes of controversy over wind turbines. The review focuses on a specific, but often highly controversial, component of planning practice: environmental and social appraisal. The review advances understandings of the reasons for contestation over the social impacts of wind turbines; the basis and legitimacy of plurality and contestation; and, the biases that tend to underpin understandings of the role and functioning of participation in appraisal. A typology of actors' attitudes to wind energy is employed to elucidate the implications of our review for appraisal practices. We conclude that a broader understanding of the societal purposes of public participation needs to be integrated into appraisal theory and practice, including an acceptance of the legitimacy of antagonism and dissent and its value in fostering social learning.  相似文献   

11.
    
The Covenant of Mayors has secured the commitments of over 5400 European Cities (as of December 2013) to achieving the European Union 20-20-20 climate change mitigation targets by 2020 through action at the local level. Due to the youth of the initiative, few experiences have been reported in the academic literature. We study the development of the Sustainable Energy Action Plan (SEAP) in the city of Girona (Catalonia, Spain) to analyse the opportunities and challenges this process may present in a small- to medium-sized, compact Mediterranean city. This knowledge can provide information to local authorities in similar municipalities, technical teams and decision-makers at the European level interested in enhancing the performance of such plans in the future. In this article, we explain how the SEAP was developed in Girona, the main results and proposed actions, and discuss the main setbacks. We conclude that an overarching European oversight organism is advisable to coordinate and aid local efforts.  相似文献   

12.
    
ABSTRACT

This paper solves an optimal generation scheduling problem of hybrid power system considering the risk factor due to uncertain/intermittent nature of renewable energy resources (RERs) and electric vehicles (EVs). The hybrid power system considered in this work includes thermal generating units, RERs such as wind and solar photovoltaic (PV) units, battery energy storage systems (BESSs) and electric vehicles (EVs). Here, the two objective functions are formulated, i.e., minimization of operating cost and system risk, to develop an optimum scheduling strategy of hybrid power system. The objective of proposed approach is to minimize operating cost and system risk levels simultaneously. The operating cost minimization objective consists of costs due to thermal generators, wind farms, solar PV units, EVs, BESSs, and adjustment cost due to uncertainties in RERs and EVs. In this work, Conditional Value at Risk (CVaR) is considered as the risk index, and it is used to quantify the risk due to intermittent nature of RERs and EVs. The main contribution of this paper lies in its ability to determine the optimal generation schedules by optimizing operating cost and risk. These two objectives are solved by using a multiobjective-based nondominated sorting genetic algorithm-II (NSGA-II) algorithm, and it is used to develop a Pareto optimal front. A best-compromised solution is obtained by using fuzzy min-max approach. The proposed approach has been implemented on modified IEEE 30 bus and practical Indian 75 bus test systems. The obtained results show the best-compromised solution between operating cost and system risk level, and the suitability of CVaR for the management of risk associated with the uncertainties due to RERs and EVs.  相似文献   

13.
The major present hindrance in using desalination to help alleviate global water scarcity is the cost of this technology, which, in turn is due to energy cost involved. This study examines historical trends in desalination and breaks up the cost of desalination into energy based and nonenergy based. It then develops the learning curves (relationship between cumulative production and market price) for desalination. Assuming that the photovoltaic (PV) technology will be the dominant form of energy used in the desalination process, the existing PV learning curve and desalination learning curve are combined to explore the viability of large‐scale adoption of desalination in the future. The world has been divided into seven regions and it is assumed that water demand from desalinated water will be met only within the 100‐km coastal belt. It is shown that, in most of the regions, other than sub‐Saharan Africa, Central America, and South Asia (where water tariffs are low), the desalination (without considering energy) becomes viable by 2040. For PV technology, less than 1 million MW per annum growth is required till 2050 to make it affordable. Globally, desalination with renewable energy can become a viable option to replace domestic and industrial water demand in the 100‐km coastal belt by 2050.  相似文献   

14.
Fuelwood consumption in Northern Nigeria exceeds the sustainable production, and the deficit is currently met through long-distance transport from the southern part of the country at an artificially low cost Current household fuel consumption patterns and factors affecting stove choice are discussed. Little has been done to promote more efficient woodstoves in the region, but prospects for stove programs are only good where fuelwood is marketed and the policy environment is conducive. At subsidized official prices for kerosene, liquefied petroleum gas (LPG), and electricity, wood is more expensive on a net usable heat basis, but the high capital cost of stoves for these fuels prevents many households from switching. Moreover, these fuels are often only available at much higher parallel market prices, which result in wood being the less expensive choice. There is little prospect for substitution of coal, solar cookers, or biogas digesters.  相似文献   

15.
    
All economic sectors are associated with energy use; therefore, government organizations aim to supply sustainable energy for human needs and economic growth. In particular, increased environmental concerns of the public in Turkey have impacted policymaking for renewable energy (RE) management in Turkey. The primary objective for RE sources of the Turkish Ministry of Energy is to ensure that 30% of the share of electricity production is from RE resources in 2023. In this paper, the integrated multi-objective, multi-period linear programming model is presented to determine effective allocation of RE supply for seven different geographical regions in Turkey for the period of 2017 to 2024. The integrated model consists of two different stages. The first stage involves qualitative evaluations of RE sources for seven geographical regions. Analytical Hierarchy Process (AHP) is applied to determine criteria priorities and overall ratings of geographical regions across determined criteria for RE sources are computed. The second stage of the integrated model consists of a multi-objective, multi-period linear programming model. The proposed multi-objective linear programming model is coded in MPL (Mathematical Programming Language) and solved using the GUROBI 5.1.0 solver. The output of the integrated model presents the total supply amount of RE sources for geographical regions in planning period. The ε-constraints method is applied to compute the total supply amount of RE from geographical regions for the period of 2017 to 2024. In this study, a systematic decision-making model is generated to allocate renewable energy sources to the geographical regions. The presented model integrates qualitative evaluations and quantitative parameters of different geographical regions to determine the optimal supply amount of RE. The obtained results are consistent with the potential quantities of RE alternatives in geographical regions, regional specifications, and social requirements.  相似文献   

16.
    
The overarching aim of this study is to determine how distinct climate change management practices (CMPs), ranging from the establishment of carbon targets to the adoption of renewable energy and carbon assurance, resonate in the realm of corporate reputation (CR). The study sample comprises US S&P 500 companies (2016–2018). Reputation insights are obtained from the Global RepTrak® Pulse of the Reputation Institute, and data on the adoption of various CMPs are extracted from Carbon Disclosure Project reports. Logistic regression analysis shows that the findings underscore the pivotal role of absolute carbon and renewable energy use targets in enhancing CR. However, the effects of CMPs on CR vary with carbon trading regulations and intensive sector affiliation. The main findings hold after the Heckman selection model is used as an endogeneity technique. This research offers valuable insights to corporations that seek to strategically manage their reputation amidst the challenges of climate change.  相似文献   

17.
House-Peters, Lily, Bethany Pratt, and Heejun Chang, 2010. Effects of Urban Spatial Structure, Sociodemographics, and Climate on Residential Water Consumption in Hillsboro, Oregon. Journal of the American Water Resources Association (JAWRA) 46(3):461-472. DOI: 10.1111/j.1752-1688.2009.00415.x Abstract: In the Portland metropolitan area, suburban growth in cities such as Hillsboro is projected to increase as people seek affordable housing near a burgeoning metropolis. The most significant determinants for increases in water demand are population growth, climate change, and the type of urban development that occurs. This study analyzes the spatial patterns of single family residential (SFR) water consumption in Hillsboro, Oregon, at the census block scale. The following research questions are addressed: (1) What are the significant determinants of SFR water consumption in Hillsboro, Oregon? (2) Is SFR water demand sensitive to drought conditions and interannual climate variation? (3) To what magnitude do particular census blocks react to drought conditions and interannual climate variation? Using ordinary least squares multiple regression and spatial regression methods, we found that base use, representing indoor water use, is dependent on household size and that seasonal use, representing external water use is dependent on both education level and the size of the property’s outdoor space. Spatial analysis techniques determined that although the water demand of the study area as a whole is not sensitive to drought conditions, certain individual census blocks do respond with a higher magnitude of water use. The most climate-sensitive census blocks tend to contain newer and larger homes, and have higher property values and more affluent and well-educated residents.  相似文献   

18.
Complex relationships exist between programs to reduce carbon dioxide (CO2) from the electricity sector and programs to promote renewable electricity generation. Simulation modeling of three scenarios in the UK electricity sector are used to identify potential interactions between these programs. A strict CO2 cap can result in a renewable electricity requirement being easily met. Conversely, the renewables quota could be required under low natural gas prices to keep electricity suppliers from switching from coal to gas. Similarly, CO2 trading can reduce renewables deployment levels because purchased CO2 allowances replace renewables. Therefore, both programs are required to ensure CO2 and renewables goals. The planning implications for administrative procedures and renewables subsidies are also discussed.  相似文献   

19.
    
In line with the global target of reducing climate change and its impact, this study explored the causal relationship between CO2 emissions, modernized agriculture, trade openness, aggregate and disaggregate energy consumption in 14 African countries from 1990–2013 using a panel quantile estimation procedure. The empirical results showed that value addition to agricultural commodities declines CO2 emissions in countries with high pollution levels. The study revealed a positive nexus between CO2 emissions and energy consumption homogeneously distributed across quantiles. Trade openness was found to lower CO2 emissions in countries with lower and higher levels of environmental pollution. While fossil fuel energy consumption was found to exacerbate CO2 emissions, renewable energy consumption confirmed its mitigating effect on environmental pollution. The institution of climate‐smart agricultural options will sustainably increase productivity and income while adapting to climate change by reducing greenhouse gas emissions. Diversification of energy technologies with clean and modern energy sources like renewables avoid the over‐dependence on fossil fuels for agricultural purposes. Trade policies can stimulate flows of technology and investment opportunities for specialization in production and economies of scale. Hence, the consideration of policies that boost agricultural sector productivity and create an efficient market for international trade in Africa will help in improving livelihoods.  相似文献   

20.
Water conservation is a much emphasized policy of the Federal government. Discussion of water conservation proposals often involves confusion between a conservation “ethic,” which is an end in itself, and conservation as a means for attaining various economic objectives. Analysis indicates that outside of ground water “mining.” water is usually a renewable and reusable resource. During periods of normal precipitation, water conservation should be employed only when the value of the water saved exceeds the cost of effecting the savings. Water conservation is most valuable as a drought contingency tactic. Water conservation as a substitute for structural provision to meet normal water demand growth is apt to prove shortsighted.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号