太阳能LED杀虫灯的研究

太阳能光伏和LED照明技术是最有前景的无公害灭虫技术之一.为了开发低成本的无公害灭虫技术,设计了一种太阳能光伏LED杀虫灯系统.通过试验研究,取得了一定的效果.文章简述了害虫的趋光性、LED灯的光学特性和基于LED的杀虫技术.     

依靠科技进步推进节能降耗

2006年2月16日的《中国冶金报》刊登中国金属学会题为《谁是2005年的领跑者》的权威文章,:公布了2005年我国钢铁生产指标之最,在电炉生产一栏中,兴澄特钢以235千瓦时/吨名列全国电炉生产综合电耗最低.     

Research on an Arc Air-Lubricating Oil Radiator Equipped in Internal Surface of Air Intake for the Aero Engine

Due to huge-power aircraft development and more electronic devices applied onboard,high heat flow density and uneven thermal distribution are becoming new problems.One new try is adding an air-lubricating oil radiator as the secondary cooling component but there are still few reports on its research.Therefore,this paper proposes a newly-design plate-fin air-lubricating oil radiator different from tube-fin or shell-tube conventionally used in previous engine system.This radiator is arc,and equipped in internal surface of air intake.Numerical and experimental analyses were carried out on fin performance.Their results agreed well with average error of 13%on thermal resistance.Then heat and flow behaviors of oil side were presented with different structures and sizes of flowing passage.According to all research,optimized radiator is gained with fin spacing of 3.76 mm,fin thickness of 2 mm,single flowing path with width of 13 mm and gradient inlet and outlet.Its heat dissipation of 28.35 k W and pressure loss of 2.2 MPa can meet actual working requirements.The research proves an air-lubricating oil radiator with arc structure and layout mode of internal surface to be feasible,which is a new but efficient cooling scheme and can lead to an innovative but wide use in modern aircrafts.     

金晶出任太阳雨太阳能残奥助威团形象大使

5月6日,中国残奥委、中国残疾人事业新闻宣传促进会在人民大会堂联合举行新闻发布会宣布,我国能源行业新贵江苏太阳雨太阳能集团成为残奥助威团全程独家合作伙伴,在圣火传递中感动全球的残疾人运动员金晶成为"残奥助威团"的形象大使.     

1341材料在循环水泵上的应用

对热电厂发电机的三台循环水泵的运行状况进行了分析,并用BELZONA1341材料对水泵叶轮的表面进行了处理,减少了叶轮表面与水流的阻力和涡流的产生,降低了电机的有功电流,节约了电能,并且延长设备的寿命,效果十分明显.     

首届中国清洁技术投融资峰会在北京举行

随着中国经济的飞速发展,能源短缺,环境污染等问题日益严重.欧美等发达国家早已开始着手解决这些问题,每年都有大量来自于政府、企业和风险投资的资金用于清洁技术的研究与应用.根据道琼斯数据显示,2007年在清洁技术领域,全球共发生了221项投资案例,投资总额达30亿美元,比2006年增长了43%.     

Analysis of Heat and Mass Transfer for a Single-Planar-Anode-Supported Solid Oxide Fuel Cell Considering Internal Reforming

The temperature uniformity and component concentration distributions in solid oxide fuel cells during operating processes can influence the cell electrochemical and thermal characteristics.A three-dimensional thermal-fluid numerical model including electrochemical reactions and water-gas-shift(WGS)reaction for a single channel solid oxide fuel cell was developed to study the steady-state characteristics,which include distributions of the temperature(T),temperature gradient((35)T/(35)x),and fuel utilization.It was shown that the maximum temperature(Tmax)changed with operating voltage and the maximum temperature gradient(((35)T/(35)x)max)occurred at the inlet of the channel of a solid oxide fuel cell by simulation.Moreover,the natural convection condition had a great influence on T and(35)T/(35)x.The thermal stress generated by temperature differences was the key parameter and increasing the convection heat-transfer coefficient can greatly reduce the thermal stress.In addition,the results also showed that there were lower temperature gradients and lower current density at high working voltage;therefore,choosing the proper operating voltage can obtain better cell performance.     

中国科技部长万钢获国际氢能大奖

第十七届世界国际氢能大会于2008年6月15日～19日在澳大利亚布里斯班市举行,来自全世界44个国家的600余位代表聚集一堂,讨论当代氧能技术和发展趋势.     

微型燃气轮机表面式回热器的应力分析

应用ANSYS软件,对100kW高效紧凑式微型燃气轮机用表面式回热器进行了应力分析,验证了选用的换热片材料(0Cr18Ni11Nb)的可靠性.结果表明:温度载荷所产生的热应力是应力中的主要部分,温度每升高50K,应力增大6MPa;换热片设计成燃气通道截面积大于空气通道截面积时具有最高的强度.     

木醋液的精制方法及其在农林生产上的应用

木醋液的性能越来越受到人们的重视,逐渐成为人们研究的热点.文章概述了木醋液精制方法的种类、原理和现状,并对其在农林生产上的应用作了详细的介绍,对木醋液的研究提出了相应的见解.     

柴油机磨合规范优化及其油液分析

本文根据４９５Ａ柴油机的特点,结合摩擦学磨合机理,给出了４９５柴油机最佳磨合的优化指标。借助油液分析的光谱、铁谱技术可以定量地判断分析磨合过程及其趋势。为了合理地缩短柴油机磨合时间,同时又提高柴油机的整机磨合质量,研制了新配方的专用柴油机磨合油。Ｌ７ 磨合油允许空载磨合初期提高磨合速度,实现高磨损率,但产生的磨粒细微,不会擦伤磨合表面。试验表明,执行新磨合规范可以缩短磨合时间４１．７％ 。     

The effects of different greenhouse covering materials on energy requirement,growth and yield of aubergine

Effects of UV stabilised polyethylene (UV+PE), IR absorbers polyethylene (IR+PE), double layers of polyethylene (D-Poly) and single layer of polyethylene (PE), as greenhouse covers, on aubergine growth, productivity and energy requirement were investigated in a late autumn season (2001). The late and final yields of plants grown in D-Poly houses were higher than those grown in UV+PE, IR+PE and PE. Light transmission was the highest in PE, intermediate in UV+PE and IR+PE, and the lowest in D-Poly houses. Relative humidity was the highest in D-Poly, intermediate in IR+PE and UV+PE, and the lowest in PE houses. The plants in D-Poly houses grew and developed faster (more leaves and flowers) than those in IR+PE, UV+PE and PE houses. Plant growth and development in UV+PE and IR+PE houses was similar. Economic analyses showed that aubergine production was economically viable in D-Poly, UV+PE and IR+PE houses. For aubergine production in climatic conditions similar to Black Sea Region, the D-Poly greenhouse is strongly recommended, because there was a higher productivity and a lower heating requirement in comparison to UV+PE, IR+PE and PE houses.     

Hydrogen in China: Policy,program and progress

The paper introduces the role of energy in China economy context, criteria for sustainable development in energy sector, China's hydrogen vision, the role of hydrogen in China's R&D plan, recently launched national programs, and progresses and achievements in research, development and demonstration. The paper concludes that with fast economy development in the new era in China, the energy sector has been confronted with severe challenges in terms of supply security, environment pollution and greenhouse gas emission, and China has attached significant priority on research and development in hydrogen and fuel cell areas, as one of effective counter-measures to address these challenges. Transition to the hydrogen economy in China, a long-term, non-carbon energy solution, is believed to play a significant role, complementary to electricity, in the future sustainable energy system. It is recommended that more priority be attached for R&D in secondary industry, especially the utilization of hydrogen and fuel cell in stationary power generation from coal gasification.     

能量计量应用过程中的问题凸现及对策

我国建筑能耗中采暖能耗是欧洲同纬度国家的3倍。推行建筑物能量计量,是保证能源利用效率达到最优的前提。本文论述了国内外的计量方法与应用程度,对我国供热计量收费改革进行了分析,强调建筑物能量计量是我国建筑节能的关键环节之一。     

卷烟厂空调系统新风节能控制策略的研究

本文以上海某卷烟厂为例,利用空调负荷软件DEST和上海地区标准年气象参数,分析了定风量空调系统24h全天运行时各个空调季节的新风节能潜力,并提出了冬季采取调节新回风比、过渡季节通过自控系统来利用新风,夏季按最小新风运行的新风控制策略,可为卷烟行业空调系统的设计和运行提供参考。该结论还适用于热湿负荷特性类似于卷烟厂车间的全天运行的空调建筑。     

热油泄漏对土壤温度场影响的模拟分析

借助CFD(Computational Fluid Dynamics)软件建立土壤多孔介质中流固耦合的相变数学模型,对埋地管道上部泄漏热油在冬夏季不同土壤中渗透扩散时,大地温度场的变化进行模拟分析。模拟结果表明:泄漏前,热油管道冬夏季长期运行所形成的径向稳态温度场等温线分布呈近似的对称状态;泄漏发生后,热油凝点以上的液相热影响区域冬夏季等温线分布相似,均是以扇形区域逐步向四周扩张,固液两相区外围的热影响区冬季冻土中的温度梯度大于夏季泄漏工况;热油在冬季冻土中的扩散速率比夏季低约3%。     

江西工业领域推行合同能源管理的对策建议

合同能源管理是西方发达国家普遍采用的节能机制,1997年引入我国后,经过10多a的发展,政策日益完善,市场规模不断扩大,成为我国开展节能工作的有力工具。对江西省节能服务产业现状及存在的主要问题进行’了．分析,提出了加快推行江西省工业领域合同能源管理的对策建议。     

Differential evolution (DE) strategy for optimization of hydrogen production and utilization in a thermally coupled membrane reactor for decalin dehydrogenation and Fischer-Tropsch synthesis in GTL technology

In this study, the operating conditions of a thermally coupled membrane reactor (TCMR) in gas-to-liquid (GTL) technology are optimized via differential evolution (DE) method to maximize the hydrogen mole fraction in the endothermic side as well as the gasoline yield in the exothermic side. TCMR is designed as a double pipe reactor where highly exothermic Fischer-Tropsch synthesis (FTS) reactions in the exothermic side are coupled with decalin dehydrogenation reaction in the endothermic side. The minimum required hydrogen molar flow rate in the recycled stream is optimized to compensate a hydrogen lack at the end of the reactor in the exothermic side. The optimization results show 14.28% increase in the gasoline yield in optimized TCMR compared with conventional tubular reactor (CR). Moreover, 81.49% hydrogen is produced in the endothermic side and about 1% hydrogen is recycled to the exothermic side for utilization in FTS reactions in optimized TCMR.     

Towards consistent and reliable Dutch and international energy statistics for the chemical industry

Consistent and reliable energy statistics are of vital importance for proper monitoring of energy-efficiency policies. In recent studies, irregularities have been reported in the Dutch energy statistics for the chemical industry. We studied in depth the company data that form the basis of the energy statistics in the Netherlands between 1995 and 2004 to find causes for these irregularities. We discovered that chemical products have occasionally been included, resulting in statistics with an inconsistent system boundary. Lack of guidance in the survey for the complex energy conversions in the chemical industry in the survey also resulted in large fluctuations for certain energy commodities. The findings of our analysis have been the basis for a new survey that has been used since 2007. We demonstrate that the annual questionnaire used for the international energy statistics can result in comparable problems as observed in the Netherlands. We suggest to include chemical residual gas as energy commodity in the questionnaire and to include the energy conversions in the chemical industry in the international energy statistics. In addition, we think the questionnaire should be explicit about the treatment of basic chemical products produced at refineries and in the petrochemical industry to avoid system boundary problems.