A Research of the Off-Grid Photovoltaic Generation System Based on MPPT Control Strategy

随着一次性传统能源日渐枯竭和环境污问题的不断加剧，新能源的研究和利用不断受到国内外的重视，太阳能等新能源利用技术成为世界研究的热点课题。光伏发电是一种利用太阳能的有效方法，已经成为世界各国竞相发展的领域。 但是目前的光伏电池转换效率不高、供电稳定性较差。由于光伏电池的伏安特性是非线性的，为了充分利用太阳能，有必要对光伏电池进行最大功率跟踪。 论文首先介绍了课题的研究背景和意义，概述了目前国内外的光伏发电技术和应用发展情况；对文献已有的光伏电池数学工程建模的理论依据进行准确的分析和补充，改进了学术上已有的模型，提高了精度。在数学模型的基础上，采用Matlab/Simulink仿真软件进行模型...With the deepening of the traditional one-time energy exhaustion and the environmental pollution,much more attention was paid to the research and application of the new energy both at home and abroad. Such as the solar energy technologies,has become a hot topic in more and more countries.As an effective way of using solar energy,the application of the photovoltaic technologies has become a new fie...学位：理学硕士院系专业：物理与机电工程学院物理学系_无线电物理学号：1982007115229

Scrap iron for treatment of reactive dye wastewater

研究了反应时间、染料浓度、进水pH以及不同的废铸铁屑投加量的条件下,废铸铁屑内电解法处理模拟印染废水的脱色能力。并采用铁屑滤床强化厌氧-好氧膜生物反应器(A/O MBR)处理含活性染料的模拟废水。研究结果表明,铁屑对模拟印染废水的最佳脱色时间为12min,酸性条件下铁屑的脱色率优于碱性条件,随铁屑投加量的增加,系统对印染废水的脱色率提高,铁屑滤床强化A/O MBR处理可以提高组合工艺出水色度和COD的去除率。 【英文摘要】 Scrap iron was effective for decolorizing reactive dye wastewater due to the redox reactions taking place near surface of scrap iron which functioned as electrode of the micro-cell systems. The effects of reaction time, dye concentration, influent pH and scrap iron dosage were investigated. The optimum reaction time was 12 min; the decolorization was better when the influent pH was acidic and/or a higher iron dose was employed. Scrap iron addition enhanced performance of the anaerobic-aerobic membrane biore..

Performance on phosphorus removal by oyster-shell in a submerged bio-filter

探讨如何提高普通浸没式生物滤池除磷效果为目的 ,采用牡蛎壳为填料 ,通过改变水力停留时间来考察牡蛎壳和陶粒两种填料的浸没式生物滤柱对 CODMn、NH4+ - N以及 PO43 - - P的去除特性。结果表明 ,与陶粒填料相比牡蛎壳填料在对 PO43 - - P的去除方面具有明显的优势 ,牡蛎壳良好的除磷性能主要是通过生物诱导的化学沉淀来实现的。The behavior of phosphorus removal by oyster-shell media was investigated at di fferent HRT and phosphorus concentrations in a submerged bio-filter. The experi ment was carried out in two bio-filter columns packed with oyster-shell and ceramsite media respectively. Both oyster-shell and ceramsite media had sim ilar behavior in the removal of NH 4 +-N and COD\-\{Mn\}, whereas oyster-she ll performed well efficiency in phosphorus removal. It was found that the remova l rate of phosphorus for oyster-shell was up to 70%, which was higher than that (30%) for ceramsite media. It was evidenced that oyster-shell could remove pho sphorus effectively by biologically-induced chemical precipitation

淹没式贝壳填料生物滤池的除磷效应

　探讨了以贝壳为填料的生物滤池的除磷机理,研究了影响除磷效果的主要因素。静态试验结果表明:在酸性条件下贝壳能够通过化学作用去除水中的磷。连续试验结果显示:当控制水力停留时间在5h以上时贝壳显示出较高的除磷效率;当贝壳与陶粒的填充高度之比为2∶1时除磷效果最佳,除磷率可达75%～85%

Design on Optimizing Configuration of Savonius Rotor

对传统SAVOnIuS型垂直轴风力机各几何参量进行优化,在此基础上加入一种半自动阀门装置,得到的新型SAVOnIuS风力机,在设计风速10 M/S下,对其各项空气动力学性能参数进行计算。结果表明,这种风力机具有很好的开发意义,可应用于沿海地区民宅的小型风力发电,城市公共照明及景区夜景工程的离网供电。This paper mainly optimized the different parameters of conventional Savonius rotor and further attempted to insert valves on the concave side of blade.The aerodynamic performance of this optimum configuration of Savonius rotor was calculated on the basis of the nominal velocity V=10 m/s.The computing results indicated that the optimum Savonius rotor could be used in these fields such as small-scale production of electricity for home use in seaboard,city public lighting and beauty spot night lighting.福建省重大科技项目资助(No.2006H0092

Design of stand-alone solar lighting system based on super capacitor energy-storage

介绍了一种基于超级电容模块储能的独立太阳能照明系统的设计,包括储能模块、充电、稳压输出电路和光控微波探测延时电路,对设计的系统进行性能测试,取得了很好的预期效果,随着超级电容性能的提升和太阳电池性价比的不断提高,离网型太阳能照明系统有广阔的市场。A design of stand-alone solar lighting system based on super capacitor energy-storage module was introduced,including energy-storage module,charging circuit,regulator output circuit and microwave detection-delay circuit of optical control.And by testing the design of the system performance,good expectations were achieved.As the super capacitor performance develops and cost-effective solar cells continuously improve,the stand-alone solar lighting system has a broad market.福建省重大科技项目资助(2006H0092

电流辅助加热条件下Ti_3AlC_2/Zr连接界面研究

采用电场辅助加热技术实现了Ti_3AlC_2/Zr的低温连接,并对其界面结构进行了研究。在TAC/Zr连接对中,Al的扩散激活能只有6.9 k J/mol,远低于传统的热压方法连接Ti_2AlC-Zr时Al的扩散激活能。TiC做过渡层时可以有效地抑制Al从Ti_3AlC_2一侧向Zr合金中扩散,并且可以进一步降低连接温度。研究发现,通过调控TiC涂层的计量比以调控连接界面的性能是完全有可能的

Experimental Study on Reactive Dye Wastewater Treatment by a Combined Anaerobic-aerobic Membrane Bioreactor Processes

印染废水成分复杂,主要是以芳烃和杂环化合物为母体,带有乙烯砜基活性基团的活性染料为生物难降解染料.本文采用了厌氧好氧膜生物反应器组合工艺(A/OMBR)处理含活性染料的模拟废水.研究了在不同的基质浓度、染料浓度以及不同的氨氮浓度下,A/OMBR对模拟印染废水的降解特性.研究结果表明:该工艺对活性染料的脱色主要由厌氧槽的水解酸化来完成,而好氧槽主要起去除COD的作用;增加进水葡萄糖以及氨氮浓度对染料的脱色率基本没有影响.Dyeing wastewater mainly contains aromatic and heterocyclic compounds.In this paper,a combined anaerobic-aerobic membrane bioreactor process (A/O MBR) was employed and the treatment behaviors of reactive dye wastewater were investigated under the different concentrations of substrate (glucose),dye and NH_3-N in influent.The results showed that the decolorization was accomplished mostly in anaerobic vessel through the hydrolyze-acidification,whereas the COD removal was in aerobic membrane vessel.In addition,the increase of glucose and NH_3-N concentrations in influent has little effect on the decolorization efficiency

The Performance Investigation on Nano Carbon-Modified Lithium Hydroxide for Low-temperature Chemical Heat Storage

LiOH·H_2O nanoparticles supported on grapheneoxide（GO） and carboxylic multi wallcarbon nano tubes（c-MWCNTs） were facilely synthesized by a hydrothermal process.The pivotal thermophysical property of nanocomposites was characterized by scanning elect

纳米碳/氢氧化锂复合材料的低温化学蓄热性能研究

本文将氧化石墨烯（GO）、羧基化多壁碳纳米管（c-MWCNTs）等纳米碳材料通过水热的方法与氢氧化锂进行反应,得到碳基氢氧化锂化学蓄热复合材料。采用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射分析仪（XRD）以及热重/同步差热分析仪（TGA-DSC）等表征手段获取了复合材料的表观形貌、负载组分、蓄热密度等关键热物性参数。研究表明纳米碳材料的复合使LiOH的单体水合速率大幅度提升,与此同时蓄热密度有着不同程度地增大,其中以GO/LiOH复合材料的化学蓄放热性能最为突出。除此之外,材料整体的导热系数也由于GO的复合有着显著的提高。本研究拓展了碳材料在储能领域的应用范围,针对纳米碳化学蓄热复合材料提供了理性的设计方法