抽水蓄能电站弃渣场运维现状简析

本文首先介绍本次弃渣场现状调查概况,然后统计分析46个弃渣场资料,获得以下认识:目前约有65%的弃渣场由电站自行管理,其余已移交当地政府;约70%弃渣场的护坡、截排水及拦档等设施均处于正常状态;其余30%的弃渣场局部有变形或者损坏或严重损害,或拟申请经费进行相应的治理;应重视筹建期和基建期弃渣场勘测设计和管理标准,在设计时考虑自动监测设施、巡检便道的布设和设计,并预留相应的费用;观测和监测设施尽可能采用先进、可靠的自动化采集设备。上述认识对类似工程具有一定的借鉴作用。     

基于光谱分布差异修正的多晶硅组件PR模型研究

以天气修正的PR效率(performance ratio)计算模型为研究对象,提出一种基于光谱分布差异的峰值日照时数计算模型,通过对比分别用基于光谱分布差异的峰值日照时数计算模型和基于天气修正的辐照量的峰值日照时数计算模型计算得出PR产生的差异,分析太阳辐照度光谱分布差异对多晶硅组件PR效率的影响。统计研究结果表明PR与SCPR(spectrum-corrected performance ratio)相比,其值高约12.76%;SCPR的波动范围与PR相比较小;SCPR与PR的变化趋势相同。     

抽水蓄能电站弃渣场勘察设计中若干问题的探讨

抽水蓄能电站弃渣场规模较大,其失稳问题既涉及电站生产建设活动安全、又与人民生命财产安全和环境保护密切相关,对其勘察设计的研究在安全生产和生态文明的建设进程中显得尤为重要.抽水蓄能电站弃渣场在前期勘察设计阶段,存在勘察与设计的进度和深度匹配性较低、工程建设条件调查和研究不足及稳定性计算方法有待完善等诸多问题.本文针对弃渣体存在问题开展研究,对比总结了相关规范和要求,通过实际调研、案例分析等方法,具体剖析目前抽水蓄能电站弃渣场勘察设计现状,并结合工程实际,最后提出了勘察设计方面的结论和建议:一是要细化完善规程规范相关要求,二是要重视渣体物理力学参数和计算分析方法手段,三是要重视弃渣场监测和管理工作,提升管理水平.     

维持东洞庭湖湖泊功能的河湖格局研究

洞庭湖为我国第二大淡水湖,湖泊功能丰富。近年来,受气候变化、三峡工程运用和社会经济发展共同影响,洞庭湖水位偏低,湖泊功能面临挑战。湖泊功能的发挥需要以一定的水文条件为基础,本文以城陵矶七里山水位表征东洞庭湖河湖格局,将河湖格局分为河相(水位小于22 m)、河相主导(水位介于22~24 m)、湖相主导(水位介于24~26 m)、湖相(水位大于26 m)共四个阶段,对应的湖相指数分别为小于1.0、1.0~1.7、1.7~4.3、大于4.3。1950—2012年观测资料表明,这四个阶段多年平均在年内所占比例分别为45%、13%、16%、26%,其中湖相主导和湖相天数均呈下降趋势。基于湿周法,总结维持东洞庭湖湖泊功能的适宜水位范围为24~26 m,年内天数应在60天以上为宜。     

Regulation characteristics of oxide generation and formaldehyde removal by using volume DBD reactor

Discharge plasmas in air can be accompanied by ultraviolet(UV) radiation and electron impact,which can produce large numbers of reactive species such as hydroxyl radical(OH·),oxygen radical(O·),ozone(O3),and nitrogen oxides(NOx),etc.The composition and dosage of reactive species usually play an important role in the case of volatile organic compounds(VOCs) treatment with the discharge plasmas.In this paper,we propose a volume discharge setup used to purify formaldehyde in air,which is configured by a plate-to-plate dielectric barrier discharge(DBD) channel and excited by an AC high voltage source.The results show that the relative spectral-intensity from DBD cell without formaldehyde is stronger than the case with formaldehyde.The energy efficiency ratios(EERs) of both oxides yield and formaldehyde removal can be regulated by the gas flow velocity in DBD channel,and the most desirable processing effect is the gas flow velocity within the range from2.50 to 3.33 m s-1.Moreover,the EERs of both the generated dosages of oxides(O3 and NO2) and the amount of removed formaldehyde can also be regulated by both of the applied voltage and power density loaded on the DBD cell.Additionally,the EERs of both oxides generation and formaldehyde removal present as a function of normal distribution with increasing the applied power density,and the peak of the function is appeared in the range from 273.5 to 400.0 W l-1.This work clearly demonstrates the regulation characteristic of both the formaldehyde removal and oxides yield by using volume DBD,and it is helpful in the applications of VOCs removal by using discharge plasma.