高效斜管式浓缩池的应用

本文介绍了高效斜管式浓缩池的结构及在尾矿浓缩中系统中使用效果。     

钛浓缩釜的改造

就化工钛设备，成功地使用异种材料与设备本体进行嫁接，作了阐述。     

Quantum dot solar concentrators: Electrical conversion efficiencies and comparative concentrating factors of fabricated devices

A novel, non-tracking concentrator is described, which uses nano-scale quantum dot technology to render the concept of a fluorescent dye solar concentrator (FSC) a practical proposition. The quantum dot solar concentrator (QDSC) comprises quantum dots (QDs) seeded in materials such as plastics and glasses that are suitable for incorporation into building façades. Photovoltaic (PV) cells attached to the edges convert direct and diffuse solar energy collected into electricity for use in the building. Small scale QDSC devices were fabricated. Devices have been characterised to determine current, voltage and power readings. Electrical conversion efficiencies, fill factors and comparative concentrating factors are reported.     

集中器中实现DLMS/COSEM协议的配置链法

为了解决基于DLMS/COSEM协议构建集中器系统过程中实现Association LN类object_list属性的复杂性问题,提出了三级配置链法,对该方法进行了扩展应用,整合设计了实现DLMS/COSEM协议的一种具体、易操作的方法。实际测试运行结果表明,按照三级配置链法构建的集中器系统满足互操作性要求,并且具有结构清晰、易于扩展的特点。     

配电网电能量采集管理系统应用中存在的问题及处理措施

介绍石家庄供电公司配电网电能量采集管理系统的总体结构,针对系统软件在实际应用中存在的问题,提出相应的处理措施,通过该措施的应用,实现了对电网和用户电量信息的自动采集和管理,对该系统在河北省南部电网的推广和应用具有一定的借鉴意义。     

基于GPRS的远程抄表系统研究与实现

针对电力系统对电能的自动化管理,研制开发了远程抄表系统,该系统实现了对电能表自动连续测量和实时控制。对系统的低压电力线传输的瓶颈问题提出了有效的解决方法。对集中器和GPRS相结合的模块进行了分析,对上位机设计方法进行了介绍,完成了系统设计。     

广域测量系统中刀片式构架相量数据集中器的设计与实现

基于同步相量测量技术的广域测量系统(WAMS)为电力系统各领域的研究和开发提供了全新的数据支持平台。相量数据集中器(PDC)是WAMS中连接同步相量测量单元(PMU)和测量主站的关键环节,目前多数解决方案是采用工控机来实现。实际情况表明,基于工控机的PDC在可靠性和可扩展性方面存在明显不足。采用刀片式构架理念设计的新型PDC极大地提高了其在可靠性和可扩展性方面的表现,特别是对基于IEC 61850标准过程层总线的智能变电站有很好的适应性,实际运行验证了所提出的解决方案有效、实用。     

670 t/h锅炉直流浓淡燃烧器浓缩器失效分析

对670t/h锅炉直流浓淡燃烧器浓缩器的使用情况及磨损,尤其是浓缩器叶片的材质进行了分析,研究确定了浓缩器叶片的失效形式,为提高浓缩器耐磨性提供了理论依据。     

Solar-driven high temperature hydrogen production via integrated spectrally split concentrated photovoltaics (SSCPV) and solar power tower

Hydrogen production can be achieved via combined concentrated photovoltaic (CPV) and concentrated solar power (CSP) in which concentrated radiation is spectrally split and then converted in a photovoltaic receiver and a thermal absorber. This study thus proposes an innovative solar process design integrating both thermal and quantum components of solar energy while providing a complete assessment of its global performance to demonstrate its practical interest. A stand-alone solar-to-hydrogen path was modeled and numerically simulated, which was both electrically and thermally supplied by a solar power generation unit to feed the electrolyzer power utilization unit with enhanced solar-to-hydrogen conversion efficiency. Following balance of plant (BoP), the heliostat field and cavity receiver were designed to match the entire system in which the receiver only intercepts a definite range of infrared wavelength while the rest is converted by separately insulated PV cells. Moreover, dichroic reflectors and optimum cutoff wavelength were applied to fulfill separate optimization and heat load reduction of each solar cell. Finally, the solid oxide electrolysis cell (SOEC) was designed to utilize the generated thermal and electrical power appropriately. In best case scenario, a solar-to-hydrogen conversion efficiency of 36.5% was achieved under 899 W/m² direct normal irradiance (DNI) and 1000 suns concentration. The solar plant outputs at this operating point were 850 g/h H₂ and 6754 g/h O₂. Further improvement in efficiency can be achieved through alignment in regard to the site location and annual insolation variation.     

α-Stirling hydrogen engines for concentrated solar power

α-Stirling engines are receiving more and more attention for applications of concentrated solar power in small power installations (15–30 kW). The design of these engines has not experienced in recent years the breakthrough needed to deliver close to the Carnot Cycle energy conversion efficiencies. The delivered efficiencies are limited to mid-to-high 20% in the typical installations “Dish Stirling”. Here we review the latest studies made on α-Stirling engines, unfortunately mostly based on theoretical models of limited reliability, but also including very few examples of Computer-Aided Engineering (CAE) modeling followed by prototyping and testing. Finally, we present in detail one CAE model of an α-Stirling engine delivering energy conversion efficiencies of 42% with hydrogen as working fluid and adopting one hot cylinder, one cold cylinder, and one regenerator, with the hot fluid temperature of 800 °C. This efficiency is much higher than current air microturbines, which may deliver efficiencies of only about 20% working at much lower temperatures.