共查询到20条相似文献,搜索用时 15 毫秒
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Mirhamed Mola 《国际自然能源杂志》2013,34(3):110-117
The main purpose of this paper is to capture the maximum output power of the wind turbine under various environmental conditions. To achieve this goal, the wind turbine model has been studied and analysed under both low-wind and high-wind circumstances and due to the noisy behaviour of the wind, type II fuzzy logic controller is used for this purpose. Simulations with MATLAB show that type II fuzzy logic controller has better performance than type I. 相似文献
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太阳能光伏发电概述及发展前景 总被引:4,自引:0,他引:4
马宁 《智能建筑电气技术》2011,5(2):25-28
本文概述了全球及我国的能源现状,表明了光伏发电的重要性和前景.文中详细介绍了太阳能电池的原理和工作特性,并列举出当今市场上主要的三种太阳能光伏发电系统,对其中的应急防灾独立/并网混合型光伏发电系统进行了着重介绍.最后指出了国内外光伏产业发展现状,并对未来我国太阳能光伏发电技术进行了展望. 相似文献
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介绍了太阳能光伏发电系统的组成与分类,论述了太阳能光伏建筑的优点以及应用情况,就光伏方阵封装材料和光伏蓄电池的选择进行了探讨。太阳能光伏建筑将光伏发电与建筑完美结合,是太阳能在建筑中应用的一种新概念,随着太阳能发电产业的迅速发展,太阳能光伏技术日趋成熟。开发高性能和低成本的光伏方阵封装材料、蓄电池,是太阳能光伏技术在建筑中应用的重要研究课题。 相似文献
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为提高大同地区光伏建筑一体化的产电量,对影响光伏电池发电量的因素进行了分析,并在此基础上用Ecotect软件进行模拟计算,最终解决了大同市光伏阵列最佳安装角度取值范围的问题。 相似文献
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方红 《智能建筑电气技术》2013,(6):16-21
本文包括光伏发电、天然光利用和风能发电三方面在建筑中的应用。论述了可再生能源应用技术的基本原理、系统组成、应用方式等,分析了可再生能源在建筑领域的应用现状及前景。为促进可再生能源的开发利用,增加能源供应.节约能源消耗,提出了一系列方案,给建筑节能提供了新的思路。 相似文献
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根据烟台市的风能太阳能资源条件,考虑到风能太阳能发电的互补特性,将风力发电装置和光伏发电装置组合成风光复合发电系统,分析了该复合系统的结构组成及原理,研究结果表明:该系统能够满足负载对用电量的要求,经济性较好,在解决偏远的高速公路路灯以及孤岛等的供电问题上提供了新的解决方式。 相似文献
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《Journal of Building Performance Simulation》2013,6(1):1-16
In this work, we investigated the interplay and the influence of lighting and blind control models on the heating, cooling, and lighting energy loads of an office room. By including different stochastic models for occupancy and appliances, we built a complete simulation environment based on the building simulation program IDA ICE. For control models, we implemented different strategies, including a simple on/off scheme, a realistic model of occupants, and an optimized control. In literature, the results are often compared with simple on/off schemes, which are not hard to beat in terms of performance. With an optimal control, the real saving potential is assessed, which can be used as benchmark case for comparison with other control models. Results based on annual simulations show that active occupants can reduce energy consumption by up to 50% from a worst-case scenario, whereas advanced controllers can further reduce the consumption by another 60%. 相似文献
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The study assessed the feasibility and economic viability of solar and wind energy resources as sustainable electrical source for rural communities unconnected to the grid. Rural communities made up of 200 homes, a school and health centre were conceived. Specific electric load profile of 358?kWh per day, with 46?kW primary peak load and 20?kW deferrable peak load, was formulated to match the rural communities. The assessment of the design that will optimally meet the daily load demand with a loss of load probability of 0.01 was carried out by considering three stand-alone applications of photovoltaic (PV), wind, diesel, and a hybrid design of wind-PV. The result showed that a cost-effective alternative for power generation at the different sites surpassed the conventional diesel stand-alone system. Also, the embedded generation analysis showed that 5 of the 6 configurations yielded profits for a 10-year project life in line with the present national tariff order. 相似文献
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可持续发展是人类社会的共同追求,太阳能作为清洁、可再生能源,具有巨大的开发利用价值。光伏建筑一体化技术是将光伏发电与建筑完美结合,将光伏组件融合到建筑成为建筑的整体结构的一部分,实现太阳能利用与建筑物的完美结合,体现现代建筑的环保绿色设计理念。 相似文献
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本文介绍了光伏建筑一体化发展的现状,主要讨论了光伏建筑一体化的形式与设计要素,根据相关规范,阐述了系统设计中的注意事项,最后对光伏建筑一体化的发展提出展望。 相似文献
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本文首先介绍了国内外低压电气节能技术的发展历史,然后从变配电室、变压器、供电电缆、动力及照明等方面阐述了当前节能技术所采取的措施,最后对低压电气节能新技术进行了描述。 相似文献
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太阳能光伏建筑一体化 总被引:2,自引:1,他引:2
从当前世界金融危机促进太阳能光伏建筑一体化发展的观点入手,论述了太阳能光伏建筑一体化的定义、原理、类型、方式、特点和要求,介绍了薄膜光电池在太阳能光伏建筑一体化的发展及优势,列举了一些国内外案例,光伏建筑一体化太阳能将成为功效最佳、价格最低廉的替代新能源,太阳能光伏建筑一体化发展任重道远。 相似文献
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单层悬索光伏支架为风敏感结构,然而目前中国规范并无对于其风振系数的规定,故对其风振系数的取值进行研究。应用AR法模拟风荷载并进行动力时程分析,针对结构非线性的特点提出了风振系数的计算方法并编制了计算程序,分析了不同节点处风振系数的基本分布规律,探讨了风振系数随结构参数的变化规律,对比了不同控制点处风振系数的静力等效结果,给出了内力风振系数与竖向位移风振系数的建议取值范围。结果表明:拉索不同节点的内力风振系数较位移风振系数更为集中,各节点的竖向位移风振系数均大于水平位移风振系数; 风振系数受光伏板角度的影响较小,在0°~15°内风振系数几乎不改变; 竖向位移风振系数受钢架间距影响较大,其整体趋势随着钢架间距的增大而增大,但其值有一定的波动; 拉索初始预张力增加会使得竖向位移风振系数大幅减小; 以风振响应最大值点为控制点能保证结构安全且可对结构风振响应进行较好的静力等效; 内力风振系数与竖向位移风振系数的合理取值范围分别为2.0~2.3与3.2~5.5。 相似文献
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光伏建筑一体化有着广阔的市场领域,前景光明。目前仍处于研发及试行应用阶段,存在的问题主要为光伏建材缺少标准、施工技术不成熟、国家电网系统不支持、消费观念落后、缺少相关人才及政策不具体等。本文针对以上原因提出了解决建议,以期对我国光伏建筑一体化的快速发展提供帮助。 相似文献
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Different studies in recent years show that many structural failures are due to errors in planning, design, construction and utilization. These are difficult to quantify and have not been considered in probabilistic design methodologies (reliability theory). In practice the designer must use his practical experiences, the actual conditions and the pure speculations when evaluating safety factor values. Therefore, the reliability of structures is not only an objective but also a subjective concept, which is a property of the designer's state of knowledge. They need a way of combining all the subjective information, which are of multivalued nature and come from multiple sourcesof estimates.
In this study an inferential method applying fuzzy set and fuzzy logic to analyze safety of the existing structures is presented. 相似文献
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Whatever method is used to estimate the safety of a structure under fatigue loading, there is inevitably a mismatch between the predictions of the theoretical model used and the performance of the actual structure when built. It is the purpose of this paper to present an analysis of this mismatch and to suggest a method of fuzzy logical analysis which may be used to assess it. Three types of parameters are identified. The first group are those which can be precisely defined, measured and controlled in a laboratory experiment; the second are those which are difficult to define and measure even in the laboratory and the third are those unknown parameters which account for the scatter in laboratory fatigue tests. A fuzzy logic model of the mismatch between the behaviour of the completed structure and the laboratory models and between the service loading and those loadings used in the laboratory is presented. The probability of a particular class of weld detail in a bridge structure is calculated using a probabilistic measure on a fuzzy relation. This probability is then modified by the results obtained from subjective estimates input to the fuzzy logic model to obtain a fuzzy probabilistic measure of the safety of the detail. 相似文献