青海大规模光伏发电发展问题探讨

分析了目前青海省光伏发电发展现状,探讨青海省大规模发展光伏电站面临的主要问题,并就问题的解决方案从技术措施和政策支持等角度予以阐述。为保证规模化光伏电站接入青海电网后电网的安全、稳定、经济运行提供了重要的理论支持和实践指导,对青海省光伏产业的发展乃至节能减排目标的实现起到重要作用。     

多炉一塔脱硫工艺取消增压风机的可行性研究

多炉一塔脱硫工艺中通常设置增压风机,但在工程实践中增压风机存在着喘振、失速、高能：耗等诸多运行问题。以某自备电厂3台220t／h燃煤锅炉烟气脱硫工程为例,针对多炉一塔湿法脱硫工艺是否设置增压风机,从性能、能耗、运行维护成本等方面对设计方案进行了经济技术比较,并利用流场模拟对烟气系统进行了优化,最终通过引风机的改造替代了增压风机的设置,为小型燃煤电厂湿法脱硫工艺的系统设计提供参考。     

An integrated tool to assess the role of new planting in PM10 capture and the human health benefits: A case study in London

The role of vegetation in mitigating the effects of PM₁₀ pollution has been highlighted as one potential benefit of urban greenspace. An integrated modelling approach is presented which utilises air dispersion (ADMS-Urban) and particulate interception (UFORE) to predict the PM₁₀ concentrations both before and after greenspace establishment, using a 10 × 10 km area of East London Green Grid (ELGG) as a case study. The corresponding health benefits, in terms of premature mortality and respiratory hospital admissions, as a result of the reduced exposure of the local population are also modelled. PM₁₀ capture from the scenario comprising 75% grassland, 20% sycamore maple (Acer pseudoplatanus L.) and 5% Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) was estimated to be 90.41 t yr⁻¹, equating to 0.009 t ha⁻¹ yr⁻¹ over the whole study area. The human health modelling estimated that 2 deaths and 2 hospital admissions would be averted per year.     

The Influence of the Pacific Decadal Oscillation on Annual Floods in the Rivers of Western Canada

We analyzed annual peak flow series from 127 naturally flowing or naturalized streamflow gauges across western Canada to examine the impact of the Pacific Decadal Oscillation (PDO) on annual flood risk, which has been previously unexamined in detail. Using Spearman's rank correlation ρ and permutation tests on quantile‐quantile plots, we show that higher magnitude floods are more likely during the negative phase of the PDO than during the positive phase (shown at 38% of the stations by Spearman's rank correlations and at 51% of the stations according to the permutation tests). Flood frequency analysis (FFA) stratified according to PDO phase suggests that higher magnitude floods may also occur more frequently during the negative PDO phase than during the positive phase. Our results hold throughout much of this region, with the upper Fraser River Basin, the Columbia River Basin, and the North Saskatchewan River Basin particularly subject to this effect. Our results add to other researchers' work questioning the wholesale validity of the key assumption in FFA that the annual peak flow series at a site is independently and identically distributed. Hence, knowledge of large‐scale climate state should be considered prior to the design and construction of infrastructure.     

Grey relational analysis of an integrated cascade utilization system of geothermal water

With the drastic decrease in fossil resources and rapid deterioration of the global environment, the utilization of geothermal resources has been strongly advocated. The combination of heat, power, and cold utility generation is commonly used to increase the utilization efficiency of geothermal resources. In this study, an integrated cascade utilization system of waste geothermal water (ICUWGW) from a flash geothermal power plant in China is established to increase the utilization efficiency of geothermal water. The waste geothermal water leaving the power plant is proposed for further use in cascade for two-stage LiBr/H₂O absorption cooling, agricultural product drying, and residential bathing. Twelve candidate temperature schemes showing different inlet and outlet temperatures of every subsystem are proposed for the ICUWGW. Several criteria are selected for the evaluation and screening of the candidate schemes. Grey relational analysis incorporating analytic hierarchy process is conducted to screen the optimal temperature scheme for the ICUWGW to meet the comprehensive criteria of thermodynamics and economics. Results show that the optimal scheme features significant improvement in energy efficiency, exergy efficiency, and equivalent electricity generation efficiency compared with those of the current geothermal power plant. The investment payback time of the additional subsystems for cooling, drying, and bathing is 1.85 years. Exergy analysis is also conducted to determine the further optimization potential of the optimal ICUWGW. Sensitivity analysis of electricity price on the performance of the optimal ICUWGW is also performed.     

基于协同推进生态文明建设的“多评融合”路径初探

评估是一种权力。各类"评估"实际上都代表了其主管部门的权力和利益,甚至沦为各部门争夺话语权、攫取部门利益的一道关卡。多种评价"混战",不仅评价内容重复、程序烦琐、浪费人力和资源,同时评价背后代表其主管部门的利益和权力,评价的"混战"也成为各部门维护自身利益、争夺话语权的"混战"。本文在对现有评价制度、实施情况、存在问题的剖析的基础上,基于协同推进生态文明建设的要求,提出横向上协同相关部门、纵向上协同国家和地方、政府和市场、政策规划与项目等重大决策的多评融合实施路径,最后提出了多评融合的四项政策建议。     

基于智能能源网的资源开发与市场匹配模式研究——以煤基低碳能源转化为例

智能能源网是我国＂十二五＂期间完善资源开发及能源转化的重点科研攻关课题。以煤基低碳能源转化为例,提出基于智能能源网的资源开发模式。该模式可从根本上改善我国传统的对原生资源低效和掠夺式的开发方式,提高从原生资源到能源商品整个过程的资源转化效率,在极大程度上减少生产过程中对环境造成的碳排放污染。其市场匹配模式应以政府作为引导主体,按市场化所处的不同阶段积极施行经济和科技体制改革。     

上海市火电厂烟气污染物控制对雾霾防治分析

介绍了上海雾霾的成分和火电的贡献率。火电厂通过提高除尘效率和烟气脱硫、脱硝建设,在装机容量成倍增长的情况下烟气污染物排放量持续下降,PM2,从2005年占上海的25％降至8．8％。针对新的环保标准,探讨了解决问题的措施,提出了烟气多污染物协同控制技术建议。     

某350MW汽轮发电机转子不稳定高阻接地故障查找方法及原因分析

介绍了某电厂350MW汽轮发电机转子绕组不稳定高阻多点接地故障的查找方法,接地故障的原因分析,为保证修复质量,除了按预试规程要求进行试验外,结合现场实际提出了“测量转子两极阻抗电压”对比的方法。     

港口发展与广州南沙地区的开发

当今世界 ,而港口功能的多元化发展 ,赋予了港口以及港口城市新的发展动力和机遇。广州南沙地区开发应顺应这种发展变化 ,以港口建设为动力 ,以港口经济开发为重点 ,形成广州新的经济增长极和新的滨海城市中心区 ,使广州由只有“云山珠水”的内河港口城市向拥有“山、城、田、海”的滨海城市转变 ,并进一步奠定其华南地区中心城市和珠江三角洲城市群核心城市的地位。