油罐区消防冷却水量及冷却方式的确定

本文对油罐区消防设计时,规范的采用及消防冷却方式的选择,提出了看法和建议,并结合工程实例进行计算和对比,提出冷却水量和冷却方式的确定方法     

水喷雾灭火及低倍数泡沫灭火系统在油罐消防的应用

介绍油罐区设置固定式水喷雾消防冷却水系统及固定式低倍数泡沫灭火系统,并简述水消防系统选择、水雾喷头及空气泡沫产生器的选型、布置、系统环形供水管布置和油罐区消防供水等问题。     

小球藻对奶牛场沼液处理能力及生物质生产的探究

为资源化处理奶牛场沼液、探究小球藻Chlorella vulgaris NIES-227对奶牛场沼液的处理能力以及生物质利用潜力,在柱式光生物反应器中利用小球藻处理沼液占比分别为25%、50%、75%和 100% 4种不同浓度的未灭菌污水。研究结果显示,各浓度污水中总氮、总磷和COD的去除率分别为36.0%～92.5%、42.8%～100%和6.9%～32.2%。在沼液占比为25%的污水中氮磷的去除率最高,氨氮、总氮和总磷的去除效率分别可达99.9%、91.0%和100%。微藻在低浓度沼液（25%～50%）中生长状态良好,在沼液占比为50%的污水中可获得最高生物质产率393.6 mg/(L·d)。但是在高浓度沼液（75%～100%）中微藻生长受到一定抑制,导致氮磷的去除效果变差。培养期间细菌的数量增长显著,促进了COD的去除。各浓度沼液生物质中总脂、总糖和蛋白质含量分别为13.2%～32.2%、12.3%～27.6%和16.2%～30.9%。实验数据表明,低浓度沼液能产生更多高能量组分的生物质,适合用作生物燃料的开发;高浓度沼液能产生含较多蛋白质的生物质,更适合用作动物饲料。     

风机基础沉降监测系统应用研究

提出的风机基础沉降监测系统,结合了微电子机械式测斜仪对风电机组基础沉降进行实时监测,出现异常情况后发出报警信号并启动加密监测程序。风机基础沉降监测系统应用研究为风电场运行管理人员提供了一定的管理思路。     

新疆电网风电有功功率控制系统的设计与应用

针对风电大规模并网后有功功率难以控制的问题,结合省调目前对风电调度的控制方案,建立了风电有功功率控制系统模型,从硬件实现和软件要求的角度分别对控制系统进行介绍并展开了相应的探讨,着重研究了在自动发电控制（AGC）条件下对风电采用的调度策略,并对风电场能量管理系统提出了要求,提高风电利用率,最后阐述了对风电控制系统的完善还需要做的工作。     

风电场风电机组的接地设计

较系统地介绍了风电场风电机组对接地电阻的要求、接地设计思路及方法,并提供实际工程中接地网布置图实例作为参考。     

Output power dispatch control for a wind farm in a small power system

Nowadays, a wind turbine generator (WTG) is required to provide control capabilities as the output power of WTG fluctuates. Under this scenario, this paper proposes an output power control method of a wind farm (WF) connected to a small power system using pitch angle control. In this control approach, the WF output power control is achieved by two control levels: central and local. In the central control, the WF output power command is determined by considering the frequency deviations and wind speeds using a fuzzy function. Then, the local output power commands for each of the WTGs are based on the proposed dispatch control. In the proposed dispatch control, the output commands of each WTG are determined by considering wind conditions for each of the WTGs. The simulation results by using an actual detailed model for the wind power system show the effectiveness of the proposed method. Copyright © 2010 John Wiley & Sons, Ltd.     

Exploring public preferences for traditional farming landscapes

Given that an increasing share of budgetary resources are now being spent on measures aimed at protecting the visual quality of agricultural landscapes it will be important to better understand individuals’ landscape preferences and the factors that influence those preferences. Within this context, using a nationally representive survey of Irish residents, the central aim of this study was to gain more insight into people's preferences regarding traditional farming landscapes. Individuals rated agricultural landscapes in terms of beauty quite highly but given a choice prefer traditional more extensive farming landscapes over more modern intensive farming landscapes. Moreover, the results suggest that there are systematic differences in preferences for traditional farm landscapes between different demographic groupings and also depending on individuals’ environmental value orientations. Accordingly, in studying preferences for agricultural landscapes in particular areas it will be necessary to consider the social and demographic characteristics of the population as well as the physical aspects of the landscape.     

海上风力发电现状与发展趋势

介绍了国外海上风电发展现状,提出了风电技术的发展降低了海上风电开发的成本,政府支持是海上风电发展的主要因素。从海上风能资源评估、风电机组及风电场设计等方面论述了海上风电技术的发展。研究结果表明,海上风电技术朝着低成本、大风电机组等方向发展,对我国海上风电发展具有参考价值。     

季节性冻土对风电场杆塔基础稳定性影响研究

本文分析了风电场架空输电线路的特点以及季节性冻土对线路基础的危害,并结合风电场中35 kV直流输电线路杆塔基础的稳定进行分析.计算结果表明,在季节性冻土地区,特别是对冻深较大的地区,在基础埋深达到要求的同时,切向冻胀力也会对基础的稳定造成不利影响.因此,对季节性冻土地区的输电线路基础工程除按一般地区的要求进行设计施工外...