江西省能源研究会第三届理事会工作报告

尊敬的各位领导、各位来宾、各位代表: 江西省能源研究会自第三届代表大会召开以来,在省科协、省民政厅的领导和政府有关部门的支持下,在中国能源研究会的指导下,在各专业委员会、各位理事和会员的共同努力下,遵循研究会的宗旨,积极发挥研究会的社会学术团体的优势,通过开展学术交流、科学普及、人才培训、编辑出版、国际交流和咨询服务等活动,为提高我省能源科学技术水平和能源管理水平,促使我省能源事业的健康发展发挥了积极的作用.     

加强建设项目环境保护管理工作

根据北京市环境状况公告的统计数据,2003年,全市国内生产总值为3663.1亿元,总人口达到1456.4万人,能源总消耗4707.5万tce.同时,能源需求不断增加,机动车数量快速增长,水资源持续短缺,给首都环境质量和生态改善工作带来较大压力.北京现在已经是一个大工地,近几年每年施工建设的开复工面积均在1亿m2左右,背后包含着若干个大大小小的建设项目.如何处理好建设项目在实施过程中与环境保护的关系,值得我们认真思考、总结.     

整合区域资源做强产业集团——江苏元升太阳能集团在京举行新闻发布会

1月5日下午,主题为"整合区域资源,做强产业集团"的江苏元升太阳能集团新闻发布会在北京人民大会堂隆重举行.出席发布会的有国家质检总局、国家名牌推进委员会等十几个单位的领导和专家,江苏元升太阳能集团所在的省市相关部门领导也出席了发布会.来自40多家新闻单位的记者参加了此次发布会.     

不同浓度沼液对反季大叶芹产量和质量的影响

试验研究了不同浓度的沼液对温室反季大叶芹产量和质量的影响,试验结果表明:不同浓度的沼液对反季大叶芹都具有增产作用,其中质量分数为50%的沼液效果最佳,产量比对照增产48.1%.同时,施用沼液为生产无公害绿色反季大叶芹创造了条件,达到了增产增收的目的.     

浅谈九江-南昌-樟树成品油管道工程对当地社会经济的影响

管道运输既是一种适合于油品特性的运输方式,又可以解决目前成品油运输成本高、能耗大、损耗高、安全性差和不利于环境和生态保护等一系列难题.九江-南昌-樟树成品油管道工程的兴建将对改善当地成品油的运输结构以及缓解江西省内铁路的运输紧张状况起到重大作用,可以尽快从根本上解决管道沿线地区成品油运输难的问题,满足地区经济发展的需要,实现生产力布局与交通运输布局的合理结合,加快地方经济的发展.     

新加坡的交通污染控制

随着经济的增长与城市化的扩张,交通堵塞及机动车气体排放导致的大气污染日益严重,成为多数国家的环境难题.着重介绍新加坡在解决这一问题方面的实践,以期关于这些政策和方法的考察对我国有所借鉴意义.     

Enhancement of Thermo-Flow Performances by Windbreakers for Two-Tower Indirect Dry Cooling System

The winds will greatly weaken the cooling performance of indirect dry cooling system with twin towers.The exterior windbreakers are recommended to restrain the wind adverse effects in this paper.The macro heat exchanger model was adopted to simulate the heat exchange between circulating water and ambient air.The performances of natural draft dry cooling system(NDDCS)with and without exterior windbreakers were numerically studied.The pressure,velocity and temperature distribution of cooling air in wind angles of 0°,45°and 90°was obtained and presented.The results show that in all wind directions,the performances for lateral sector of towers with windbreakers are significantly improved,but the low-pressure zone appears unexpectedly for the rear sectors,which reduces the air flow rate.The cooling performances of the twin towers with or without windbreakers decrease at first but then recover with the wind velocity increasing.Besides,the optimal flow and heat transfer performances appear in the wind angle of 0°.The cooling performances can be significantly improved in all three wind directions due to windbreaker configuration.     

Investigation of Heat Transfer Augmentation between the Ribbed Plates via Taguchi Approach and Computational Fluid Dynamics

Heat transfer and turbulent flow characteristics between the ribbed plates have been numerically studied in the present paper.The ribs with the rectangular cross-section have been placed on the top and the bottom plates of the duct,symmetrically.It is assumed that the fluid at 300 K has entered the system while the walls kept at 400 K.All numerical analyses have been performed by k-ωShear Stress Transport(SST)turbulence model for Re=10000,15000 and 20000.For the fixed rib width,the dimensionless height and the dimensionless spacing have been respectively varied as 0.1≤h’≤0.3 and 0.5≤S’≤1,and the results have been compared with the ones of the smooth plate.Even though there are twenty-seven cases obtained as a result of parametric combinations,the number of various cases has been reduced from twenty-seven to only nine different variations by applying the Taguchi method.Furthermore,the effects of all the considered parameters on the heat transfer and flow characteristics have been determined in terms of the influence degree.The optimum parameters for Nusselt number and pressure loss have been ascertained individually.What is more,the almost exact values for Nusselt number and pressure loss have also been attained by the confirmation test having an error percentage of 6%.The most dominant factor has been determined as the rib height due to its effect on both heat transfer and flow characteristics.Similarly,with respect to the numerical results,increasing the rib height,the rib spacing and Reynolds number has separately increased Nusselt number.Nevertheless,symmetrical flow structure has been disturbed as a result of ascending the rib height as clearly seen for h’=0.3 from the charts.In the meantime,pressure loss has been augmented owing to the increment of the geometrical parameters and also Reynolds number.h’=0.1 with S’=0.5 at Re=10000,h’=0.2 with S’=0.5 at Re=15000 and h’=0.1 with S’=0.75 at Re=15000 can be suggested for the heat transfer enhancement since the pressure loss of the system is tolerated.     

Experimental Study on Jet Impingement Boiling Heat Transfer in Brass Beads Packed Porous Layer

Jet impingement boiling has been widely used in industrial facilities as its higher heat transfer coefficient(HTC)and critical heat flux(CHF)can be achieved in comparison with the pool boiling.By covering beads packed porous layer on the heated wall surface,the enlarged heat transfer area and rise of nucleation sites for boiling occur,thus,the heat transfer performance of boiling can be enhanced.For the jet impingement boiling with brass bead packed porous layers,the heat transfer performance is crucially influenced by the characteristics of porous layer and working fluid flow,so the experiments were conducted to investigate the effects of the jet flow rate,fluid inlet subcooling,number of porous layer and brass bead diameter of porous layer.Comparison study shows that impingement boiling promotes the HTC and CHF as 1.5 times and 2.5 times respectively as pool boiling at similar conditions.Higher heat transfer performance can be obtained in the cases of a higher jet flow rate and a higher fluid inlet subcooling,and there exist the optimal layer number and bead diameter for heat transfer.Particularly,a double-layer porous layer results in an increase of 39%in heat flux at superheat of 30 K compared with a single-layer case;a single porous layer at d=8 mm brings an increase of 23%in heat flux at superheat of 30 K compared with that of bare plain surface.Besides,the actual scene of jet impingement boiling was recorded with a camera to investigate the behavior evolution of vapor bubbles which is highly correlated to the heat transfer process.     

Numerical Simulation of Dual-Phase-Lag Model and Inverse Fractional Single-Phase-Lag Problem for the Non-Fourier Heat Conduction in a Straight Fin

In recent years,many studies have been done on heat transfer in the fin under unsteady boundary conditions using Fourier and non-Fourier models.In this paper,unsteady non-Fourier heat transfer in a straight fin having an internal heat source under periodic temperature at the base was investigated by solving numerically Dual-Phase-Lag and Fractional Single-Phase-Lag models.In this way,the governing equations of these models were presented for heat conduction analysis in the fin,and their results of the temperature distribution were validated using the theoretical results of Single and Dual-Phase-Lag models.After that,for the first time the order of fractional derivation and heat flux relaxation time of the fractional model were obtained for the straight fin problem under periodic temperature at the base using Levenberg-Marquardt parameter estimation method.To solve the inverse fractional heat conduction problem,the numerical results of Dual-Phase-Lag model were used as the inputs.The results obtained from Fractional Single-Phase-Lag model could predict the fin temperature distribution at unsteady boundary condition at the base as well as the Dual-Phase-Lag model could.     

国家发展改革委、财政部发出通知要求稳定成品油市场供应加强价格监管

近日,国家发展改革委、财政部联合发出通知,要求进一步稳定成品油市场供应,加强价格监管.     

Influence of Turbulence Schmidt Number on Exit Temperature Distribution of an Annular Gas Turbine Combustor using Flamelet Generated Manifold

The Reynolds analogy concept has been used in almost all turbulent reacting flow RANS(Reynoldsaveraged Navier–Stokes)simulations,where the turbulence scalar transfers in flow fields are calculated based on the modeled turbulence momentum transfer.This concept,applied to a lean premixed combustion system,was assessed in this paper in terms of exit temperature distribution.Because of the isotropic assumption involved in this analogy,the prediction in some flow condition,such as jet cross flow mixing,would be inaccurate.In this study,using Flamelet Generated Manifold as reaction model,some of the numerical results,obtained from an annular combustor configuration with the turbulent Schmidt number varying from 0.85 to 0.2,were presented and compared with a benchmark atmospheric test results.It was found that the Schmidt numberσt in mean mass fraction f transport equation had significant effect on dilution air mixing process.The mixing between dilution air and reaction products from the primary zone obviously improved asσt decreased on the combustor exit surface.Meanwhile,the sensitivity ofσt in three turbulence models including Realizable k-ε,SST(Shear Stress Transport)and RSM(Reynolds Stress Model)has been compared as well.Since the calculation method of eddy viscosity was different within these three models,RSM was proved to be less sensitive than another two models and can guarantee the best prediction of mixing process condition.On the other hand,the results of dilution air mixing were almost independent of Schmidt number Sct in progress variable c transport equation.This study suggested that for accurate prediction of combustor exit temperature distribution in steady state reacting flow simulation,the turbulent Schmidt number in steady state simulation should be modified to cater to dilution air mixing process.     

国家发展改革委、国家能源办等五部门关于印发千家企业节能行动实施方案的通知

国家发展改革委、国家能源办、国家统计局、国家质检总局、国务院国资委于2006年4月7日联合发布了<关于印发千家企业节能行动实施方案的通知>(发改环资[2006]571号),研究决定在重点耗能行业组织开展千家企业节能行动.为此,特制定<千家企业节能行动实施方案>(以下简称<方案>).千家企业是指钢铁、有色、煤炭、电力、石油石化、化工、建材、纺织、造纸等9个重点耗能行业规模以上独立核算企业,2004年企业综合能源消费量达到18万吨标准煤以上,共1008家.由国家发展改革委会同国家统计局提出,并经各省、自治区、直辖市发展改革委或经贸委(经委)核对后确定.<方案>有关内容如下:     

鲜为人知的硅谷问题--高新技术的污染

高新技术产业以它的高效率、高效益、高增长和低能耗、低消耗等重要特征,成为各国发展本国经济的新增长点和支柱产业;可持续发展战略的提出和实施,标志着人类社会开始寻求一条与自然界和谐发展的道路.发展高新技术产业,兴建高新技术园区,建设中国的"硅谷",从而推动我国经济快速健康发展,已成为人们的共识.     

开展清洁生产提高热电可持续发展能力

清洁生产是一项全新的环境保护战略,是在全世界范围内从单纯依靠环境末端治理逐步转向环境过程控制的一种转变.我国政府在1994制定的<中国21世纪议程>中,将清洁生产作为实现可持续发展的优先领域,并制定了一系列的政策措施.2003年1月1日起,<中华人民共和国清洁生产促进法>正式实施,标志着我国可持续发展有了历史性的进步,我国推进清洁生产走上了法制化的轨道.     

巴西乙醇汽油为何受欢迎

在巴西,车用燃料25%为乙醇汽油,乙醇汽油的价格仅是普通汽油的约60%. 在巴西圣保罗等大城市,往日令人窒息的汽车"黑烟"消失了,市内空气指数全是优,这是推行车用环保燃料带来的新变化.近年来,乙醇车用燃料在巴西得到广泛使用,取得了显著的经济、环保和社会效益.     

天津市节能降耗工作情况及展望

天津市作为资源和市场"两头在外"的加工工业城市,能源资源的紧张一直制约着经济的健康、高速发展.天津市政府对节能降耗工作高度重视,确定了"以结构降耗为根本,以技术降耗为支撑,以管理降耗为保障,三管齐下,标本兼治"的工作思路."十五"期间,我市GDP年均增长13.9%,而能源消费总量年均仅增长8.1%,基本实现经济增长所需能源一半来自节约的目标.     

塑料大棚中"非耗能"降温的结构设计与降温效果研究

塑料大棚是农业生产的主要设备之一,在蔬菜、果树、园艺生产中已得到广泛的应用.塑料大棚的主要功能是保温防寒、防风、防虫、防止暴雨影响等作用,在北方应用,"反季节"效果非常明显,可以很好地提高作物的产量、品质和经济效益.     

建筑节能--中国节能战略的必然选择(下)

(续上期) 4.2 2020年建筑节能远景规划目标 建立健全的建筑节能标准体系,编制出覆盖全国范围的配套的建筑节能设计、施工、运行和检测标准,以及与之相适应的建筑材料、设备及系统标准,用于新建、改造居住和公共建筑,包括采暖、空调、照明、热水及家用电器等能耗在内.所有建筑节能标准得到全面实施.     

生物质能--未来全球能源的新亮点

生物质能是太阳能以化学能形式储存在生物中的一种能量形式,它直接或间接地来源于植物的光合作用,是以生物质为载体的能量.生物质包括很广范围的源自植物和动物的可获取能源的物质,诸如薪柴、农林作物、农作物残渣、动物粪便和生活垃圾等,它们有提供能源的很大潜力.