对某电厂一座135 MW机组的自然通风湿式冷却塔进行现场测试.通过对进风口周围流场的测试,分析侧风对冷却塔周向进风的影响.提出以进风偏斜角α来衡量进风偏 斜度,以进风均匀系数ψ来量化进风恶化程度.通过计算分析侧风对冷却塔通风量、通风阻力系数和冷却数的影响,完成对冷却塔通风性能及其与热力性能关系的全面评价.最后将其与数值模拟结果进行对比分析.结果表明:自然风主要恶化了塔侧向的进风,大风下侧后方出现穿堂风;背风侧进风远小于迎风侧,但进风偏斜度较低;侧风风速增大使得各处除迎风侧外进风偏斜度增加,周向进风均匀度降低,相对于抽力对气流的径向加速作用,侧风的横向干扰作用逐渐贴近进风口,通风阻力系数增大,通风量降低,通风性能恶化,热力性能降低;由于穿堂风参与了雨区的传热传质,使得计算通风量增加,塔的热力性能有一定改善.

关键词：冷却塔；侧风；现场试验；通风性能；空气流场

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This report covers the present scenario and the growth prospects of the Smart Grid market in China for the period 2012-2016. The report also presents the vendor landscape and a corresponding detailed analysis of the four leading vendors in the Smart Grid market in China. However, this report does not provide the market share of the vendors; it only lists the key players in the market. In addition, the report discusses the major drivers that influence the growth of the Smart Grid market in China. It also outlines the challenges faced by the vendors and the market at large, as well as the key trends that are emerging in the market.

关键词：智能电网；电气公司；市场趋势

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一次设备中标格局基本稳定：一次设备本次招标总量同比总体变化不大，环比有所下降。龙头公司份额依旧领先。二次设备中标情况：整体集中度下降，思源电气在保护类设备和计算机监控设备中的中标份额较上批有较大提升。

关键词：变压器；组合电器；断路器；电抗器；电容器；隔离开关

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关键词：多维；自由度；低成本；焊接机器人

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关键词：超高清；电视认证；规范

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关键词：洗衣机；新国标；洗牌

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关键词：彩电业； 探底；盈利模式

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This report documents observations and results obtained from a lighting demonstration project conducted under the U.S. Department of Energy GATEWAY Solid-State Lighting (SSL) Technology Demonstration Program at the Smithsonain American Art Museum in Washington, DC. LED Lamp samples were tested in the museum workshop, temporarily installed in a gallery for feedback, and ultimately replaced all traditional incandescent lamps in one gallery of modernist art at the American Art Museum and partially replacing lamps in two galleries at the Musesum's Renwick Gallery. This report describes the selection and testing process, technology challenges, perceptions, economics, energy use, and mixed results of usign LED replacement lamps in art galleries housing national treasures.

关键词：电子信息；LED灯；改造；演示

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Landing lights are used in night landing operations by aircrafts. Position lights are also known as navigation lights. These lights are placed on the wingtip (red on left wingtip, green on right wing tip) and on the tail of the aircraft. Anti-collision lights illuminate the important parts of the aircraft. These lights are placed at the rudder (vertical tail of the aircraft), fuselage (body of the aircraft), and on the wingtip of the aircraft. A red beacon is used on the rudder whereas white strobes are used on the wingtips. Cockpit lights assist the pilots to view the important switches and instruments. Cabin lights are used to illuminate the aircraft cabin. Emergency lights include interior and exterior lights, which are battery powered. They are not directly connected to the main electrical system of the aircraft.

关键词：着陆灯；导航灯；防撞灯；机舱灯

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Light-emitting diode (LED) airfield lighting is increasingly used at airports in the United States and abroad. The objective of this synthesis study is to provide documentation about the performance of LED airfield lighting systems, and it is primarily intended for airfield operations managers and airport electrical maintenance staff. Information about LED lighting systems in terms of performance, cost, and other operations issues is not readily found in a single location. This report is an effort to gather information about airport experiences and feedback with LED airfield lighting. A literature review and a survey of individuals representing airports that have experience with LED airfield lighting were conducted. Individuals from 22 airports and aviation agencies agreed to participate in the survey and all 22 completed it (for a 100response rate). In general, the study findings confirm that LED airfield light fixtures reduce energy use and maintenance requirements, compared with conventional airfield lighting technologies. LED airfield lighting systems have been in use for a number of years, and most feedback on their visibility and performance is positive. Early compatibility issues appear to have been largely overcome through technological progress and through efforts of the FAA to address LED technologies in its guidance to airports.

关键词：电子信息；LED照明；机场；问题

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