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找到报告 16306 篇 当前为第 1481 页 共 1631

所属行业:电力、热力、燃气及水生产和供应业

  • 14801.谁更有可能购买PHEV:详细的市场细分分析

    [电力、热力、燃气及水生产和供应业] [2014-07-24]

    关键词:新能源;PHEV;市场细分分析;混合动力电动汽车
  • 14802.清洁能源技术在低碳电力规划的多目标模型的研究

    [电力、热力、燃气及水生产和供应业] [2014-07-24]

    With the increasing development of clean energy technologies,the application of new energy and carbon capture technology would have a positive effect for CO2 emissions reduction.In this paper,planning of power system model including clean energy technology facing low carbon targets established,considering the carbon emission rights allocation and carbon trading.By studying coal-fired power plant planning model with wind power and carbon capture technology for the future planning period,establish the multi-objective model of minimum comprehensive cost and biggest carbon trading gains,considering constraint conditions of power generating capacity,wind power integrated capacity and carbon emissions reduction targets.Use the bacterial colony chemotaxis algorithm for optimization calculation of the power planning,to give a planning scheme that can meet the requirements of economic development trend and emission reducing requirements.
    关键词:新能源;清洁能源技术;低碳;电力规划;多目标模型
  • 14803.第四十六试点街道路灯照明工程

    [电力、热力、燃气及水生产和供应业] [2014-07-24]

    Street lighting improvements provide an opportunity for governments to save money and to reduce their environmental footprint. New energy-efficient technologies are being perfected that are more efficient than standard high-pressure sodium streetlights. Light-emitting diode (LED) and induction are two types that hold promise of saving money while using less energy to reach light standards. Many manufacturers have developed energy-efficient lighting products with a variety of performance claims.
    关键词:新能源;试点街道;路灯照明
  • 14804.美国太阳能发电厂的土地使用要求

    [电力、热力、燃气及水生产和供应业] [2014-07-24]

    By the third quarter of 2012, the United States had deployed more than 2.1 gigawatts (GWac1) of utility-scale solar generation capacity, with 4.6 GWac under construction as of August 2012 (SEIA 2012). Continued growth is anticipated owing to state renewable portfolio standards and decreasing system costs (DOE 2012a). One concern regarding large-scale deployment of solar energy is its potentially significant land use. Efforts have been made to understand solar land use estimates from the literature (Horner and Clark 2013); however, we were unable to find a comprehensive evaluation of solar land use requirements from the research literature. This report provides data and analysis of the land use associated with U.S. utility-scale ground-mounted photovoltaic (PV) and concentrating solar power (CSP) facilities. After discussing solar land-use metrics and our data-collection and analysis methods, we present total and direct land-use results for various solar technologies and system configurations, on both a capacity and an electricity-generation basis. The total area corresponds to all land enclosed by the site boundary. The direct area comprises land directly occupied by solar arrays, access roads, substations, service buildings, and other infrastructure. We quantify and summarize the area impacted, recognizing that the quality and duration of the impact must be evaluated on a case-by-case basis. As of the third quarter of 2012, the solar projects we analyze represent 72of installed and under-construction utility-scale PV and CSP capacity in the United States.
    关键词:太阳能;美国;发电厂;土地使用要求
  • 14805.实用程序规模的发电塔式太阳能系统:性能验收试验的指南

    [电力、热力、燃气及水生产和供应业] [2014-07-24]

    Prior to commercial operation, large solar systems in utility-size power plants need to pass performance acceptance tests conducted by the engineering, procurement, and construction (EPC) contractor or owners. In lieu of the present absence of ASME4 or other international test codes developed for this purpose, the National Renewable Energy Laboratory has undertaken the development of interim guidelines (the Guidelines) to provide recommendations for test procedures that can yield results of a high level of accuracy consistent with good engineering knowledge and practice. The Guidelines contained here follow the general approach of the earlier NREL report on parabolic trough collector fields, but in this case are specifically written for power tower solar systems composed of a heliostat (reflector) field directing the sun's rays to a receiver (heat exchanger) on a high central tower. The working fluid in the tower receiver can be molten salt, water/steam, air, CO2, or other suitable fluids, each with its own particular attributes. The fundamental differences between acceptance of a solar power plant and a conventional fossil-fired plant are the inherently transient nature of the energy source and the necessity to use a performance projection model in the acceptance process. These factors bring into play the need to establish methods to measure steady-state performance, comparison to performance model results, and the reasons to test and model multi-day performance within the scope of the acceptance testing procedures.
    关键词:太阳能;公用事业;发电塔式;太阳能系统;性能验收
  • 14806.2014年生产资料分析与预测(第五期)

    [有色金属冶炼和压延加工业,电力、热力、燃气及水生产和供应业,汽车制造业,黑色金属冶炼和压延加工业,橡胶和塑料制品业] [2014-07-24]

    前5 个月,物流与生产资料市场运行基本平稳、结构优化。一方面,市场规模增速稳中小幅回落,但保持较快增长;另一方面,在增速回落的同时,市场结构向好转变、流通方式加快转型。
    当前市场运行出现积极变化,PMI 指数持续回升,升幅扩大;市场需求回升,供需关系趋向改善,价格回稳;企业原材料补库趋于积极,开工率有所回升;就业形势稳中有升。预计后期经济走势趋稳。但经济回升动力仍需巩固,经济活力仍需加强。
    关键词:煤炭;钢材;有色金属;天然橡胶;汽车
  • 14807.苯基萘为聚光太阳能发电的传热流体:循环试验和最终报告

    [电力、热力、燃气及水生产和供应业] [2014-07-24]

    ORNL and subcontractor Cool Energy completed an investigation of higher-temperature, organic thermal fluids for solar thermal applications. Although static thermal tests showed promising results for 1-phenylnaphthalene, loop testing at temperatures to 450 degrees C showed that the material isomerized at a slow rate. In a loop with a temperature high enough to drive the isomerization, the higher melting point byproducts tended to condense onto cooler surfaces. So, as experienced in loop operation, eventually the internal channels of cooler components such as the waste heat rejection exchanger may become coated or clogged and loop performance will decrease. Thus, pure 1-phenylnaphthalene does not appear to be a fluid that would have a sufficiently long lifetime (years to decades) to be used in a loop at the increased temperatures of interest. Hence a decision was made not to test the ORNL fluid in the loop at Cool Energy Inc. Instead, Cool Energy tested and modeled power conversion from a moderate-temperature solar loop using coupled Stirling engines. Cool Energy analyzed data collected on third and fourth generation SolarHeart Stirling engines operating on a rooftop solar field with a lower temperature (Marlotherm) heat transfer fluid. The operating efficiencies of the Stirling engines were determined at multiple, typical solar conditions, based on data from actual cycle operation. Results highlighted the advantages of inherent thermal energy storage in the power conversion system.
    关键词:太阳能;苯基萘;聚光太阳能发电;循环试验
  • 14808.极端的氧化能力,酸度,碱度

    [电力、热力、燃气及水生产和供应业] [2014-07-24]

    Professor Michl and collaborators prepared several icosahedral monocarba-closo-dodecaborate anions carrying halogen and trifluoromethyl substituents and investigated their oxidation by chemical and electrochemical means and by quantum chemical calculations. These anions are of interest for fuel cell and high-voltage battery applications, because they are unusually weakly nucleophilic and extremely difficult to oxidize, with reversible redox potentials calculated up to 5 V above ferrocene/ferricenium. In liquid sulfur dioxide, the standard solvent for electrochemical oxidation at highly positive potentials, all oxidations were irreversible. In 1,1,1,3,3,3- hexafluoroisopropan-2-ol, the undecafluorinated anion is oxidized reversibly at 2.43 V above ferrocene/ferricenium (calculated 2.40 V) but the radical is too unstable for isolation. Other undecahalogenated anions are oxidized irreversibly. A promising new solvent that dissolves supporting electrolytes and resists oxidation is 1,1,1,3,3-pentafluorobutane. In two cases, the oxidized neutral radicals were sufficiently stable in perfluorohexane solution for spectroscopic characterization, but only up to -40 degrees C. At temperatures closer to ambient, this solvent was oxidized.
    关键词:燃料电池;极端;氧化能力;酸性度;碱性度
  • 14809.北卡罗莱纳州铁路客运服务燃料和技术的评估和测量

    [交通运输、仓储和邮政业,铁路、船舶、航空航天和其他运输设备制造业,电力、热力、燃气及水生产和供应业] [2014-07-24]

    关键词:汽车;燃料;替代燃料;柴油机燃料;柴油电力机车
  • 14810.电力-第502期

    [电力、热力、燃气及水生产和供应业] [2014-07-24]

    报告从主要发电企业集团动态、电力产业环境、国内电网动态、电力设备行业信息、港台电力行业信息、国际动态等几个方面进行了分析评论。
    关键词:电力;集团动态;产业环境;电网动态;行业信息;国际动态
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