共查询到20条相似文献,搜索用时 93 毫秒
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《Planning》2014,(5)
光伏发电技术的发展缓和了日益增大的能源需求,且与传统的火力发电技术相比,光伏发电技术环境效益显著,但其引起的环境问题也不容忽视。通过对光伏发电组件生产过程产生的环境问题的分析,针对各类污染的治理方法给出了建议,并提取了电池生产过程中温室气体(GHG)的CO2当量排放量和能源偿还时间(EPBT)作为光伏发电的环境效益评价因子。通过对太阳能电池的生命周期评估大量相关文献的综述得出:较之单晶硅和多晶硅太阳能电池而言,非晶硅薄膜太阳能电池的环境效益最好,但其广泛的应用还有待其能量转换率的进一步提高。 相似文献
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《Planning》2014,(1)
为缓解我国电力系统因燃煤发电所导致的高污染排放现状,本文就区域间燃煤发电互换问题进行了深入的研究,发现通过燃煤机组发电互换可以有效地降低燃煤发电的污染排放。在此基础上,基于燃煤发电机组的基本情况、电力需求情况,从节约煤炭量、提高发电效益、提高环境效益三方面着手,构建了区域间发电互换交易节煤量、发电效益增值以及发电污染物减少量效益计算模型,分析了发电互换所带来的整体效益。算例分析显示该模型可以有效的降低区域整体发电排放,增加发电买卖双方的经济效益和环境效益,具备较好的应用价值。 相似文献
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随着城市人口增多,生活垃圾的数量也逐渐增加,如何对这些垃圾进行处理成为人们首要面对的问题。在我国,每日的垃圾生产量已经达到了一个十分危险的数字,大量的垃圾堆积会减少人们有限的生存空间,且会对周围的土地造成影响,危害生态环境。本文就生活垃圾填埋场沼气发电的可行性进行分析,从沼气发电的条件和技术要求开始,考虑其所用人力以及能够带来的经济效益和环境效益。调查我国城市生活垃圾的现状,了解沼气发电的原理与优势,也提醒相关从业人员要加强技术研究,处理好垃圾填埋场沼气发电存在的问题。 相似文献
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<正>将光伏电池组件与建筑外遮阳的面板相结合,不仅能满足建筑遮阳的功能,还能利用太阳能进行光伏发电。由于建筑外遮阳不占用建筑面积,利用遮阳板发电基本上不影响建筑功能,遮阳面板的面积还可以很大,光伏建筑遮阳具有非 相似文献
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良好的光环境是保障道路交通安全的必备条件之一。在城市道路上空覆盖光伏板发电形成了新的半围合式道路空间,势必会引起道路光环境的改变。基于Ecotect软件(加载radiance插件)进行道路采光对比模拟实验,探讨覆盖光伏板后其光环境的改变及光伏板的最佳铺设形式。实验设计了对照组(未覆盖光伏板状态下的道路)与实验组(平铺、斜铺、弧形顶铺设、双坡顶铺设4种形式)。实验结果表明,支架高度一定时,平铺、弧形与双坡顶3种方式下采光情况一致,不同的顶面形式不会带来道路采光的变化,而当支架高度改变时,道路采光变化显著。三者相较,出于经济性等因素的考虑,平铺最佳。斜铺、平铺与未铺设相较,斜铺因存在顶板采光补偿不会对道路的光环境产生影响,而平铺会造成不同程度的采光遮挡,带来路灯开关灯时间增加0.5~1 h。基于光环境为考量的道路上空光伏板铺设最佳形式是斜铺,平铺次之。最终光伏板的最佳铺设形式还要综合考虑热工、声环境、造价、发电效率及能耗等各方面效益,不可偏废其一。 相似文献
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介绍了既有建筑平改坡改造,以及太阳能屋顶发电系统基本组成及设计原理.将光伏发电技术应用到建筑楼道和景观照明,阐述了该技术在当今平改坡工程屋面中的应用前景. 相似文献
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以华中科技大学太阳能光伏发电并网示范电站为例,从设计、应用等角度对太阳能光伏发电并网电站进行了浅析。该电站太阳能电池板总功率18360W,选用日本MSK公司的170型单晶硅太阳能电池板108块,分9组,每3组接一个SMC6000型逆变器。太阳能电池方阵的倾角为35°,在设计中应考虑风力和温差等影响因素。选用SBCP控制器进行系统检测和数据传输。介绍两种“孤岛效应”的检测方法。最后列出了该电站某天的发电数据。 相似文献
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Klaus Berner 《Stahlbau》2008,77(5):336-344
Sandwich panels for roof covering. Sandwich panels for roof covering, which are currently used, are in principle always equipped with a trapezoidal profiled face. It is because of this geometry that the longitudinal joints of the panels are easy made by overlapping the external metal faces. The bending stiffness of these profiled faces also largely avoid the increasing in deflection caused by creep effects of the core as a result of long‐time loading from snow and self weight. In particular for flat roofs of industrial buildings there are some disadvantages caused by the profiling of the outer faces, e. g. the sealing of openings in the roof. Furthermore the mounting of the profiled panels always have to be realized in the direction of apex to cullis because of the rain water flow conditions. This requirement premises a substructure with purlins. In the described research project sandwich panels with flat faces were developed, where penetrations can be sealed in an easy way and mounting of the panels perpendicular to the roof pitch, from frame to frame (without purlins) is possible. All necessary research was conducted, in particular with regards to creeping effects, sealing of the panel joint and special fixings. On the base of the obtained research results, practice oriented solutions are proposed. 相似文献
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Benlahcene Djaouida Zeroual Aouachria Abdelmoumène Hakim Benmachiche Sellami Ali 《国际自然能源杂志》2020,41(13):1467-1481
ABSTRACT The solar chimney power plant (SCPP) is a simple solar thermal power plant that is capable of converting solar energy into thermal energy in the solar collector. In the second stage, the generated thermal energy is converted into kinetic energy in the chimney and ultimately into electric energy using a combination of a wind turbine and a generator. The numerical simulations were performed for the geometry of the prototype in Manzanares, Spain. Using computational ?uid dynamics (CFD) techniques; we have simulated a two-dimensional axisymmetric model of a SCPP with the RNG k-ε turbulence. In this model, the discrete ordinates (DO) radiation model was implemented to solve the radiative transfer equation, using a two-band radiation model. The main objective of this work is to explore dynamic control over plant power output. We have presented a technique to control the power output of the solar chimney power plant, in order to deliver power according to specified demand patterns. In order to present this, the reference plant model was modified to include a secondary and tertiary collector roof under the existing main collector. In terms of base load electricity generation, the inclusion of a secondary and tertiary collector roof produces good control over plant output. 相似文献