东莞市实现“十二五”节能目标的思考

从结构节能、技术节能、管理节能三个方面,针对广东省下达给东莞市单位GDP能耗下降19.5%的节能任务,分析在新形势下进一步推进东莞市节能工作的方法,以实现东莞市"十二五"节能目标。     

“十一五”前4年广东省节能影响因素分析

本文对广东省能源消费情况进行了介绍,分析了"十一五"前4年广东省单位GDP能耗变化趋势,并采用因素分解模型对2006～2009年广东省单位GDP能耗和工业增加值能耗变动因素进行了分解和分析,根据上述结果,提出了"十二五"广东省节能工作的相关建议。     

第十六届中博会节能技术改造与服务供需对接会在广州召开

<正>2019年6月25日,第十六届中博会节能技术改造与服务供需对接会在广州召开。本次对接会由国家节能中心和中博会组委会秘书处主办,广东省节能中心、广东省节能协会、天津振威展览股份有限公司承办。对接会旨在贯彻落实党的十九大精神和习近平生态文明思想,根据中博会"智能、智慧、智造、节能"主题中的"节能"主题,为充分发挥节能新技术在促进绿色发展、推进生态文明建设中的支撑作用,推动解决节能技术应用中选择难、推广难、融资难、落地难等突出矛盾和问题,加快先进、适用、实用节能技术和高效节能服务在传统产业改造提升中的推广应     

基于熵权法的广东省核电节能减排效果综合评价研究

以广东省为例分析发展核电以来节能减排的综合效益,通过1993-2010年广东省统计数据,应用熵权法,从能源消耗强度、污染物排放、污染物治理与利用和经济效益四方面对广东省核电节能减排效果进行综合评价。结果表明,1993-2010年期间,广东省核电节能减排综合效果呈上升趋势;单位GDP煤炭和石油消耗总量、火电生产和CO₂排放总量、单位GDP综合能耗呈下降趋势;单位GDP核电和水电生产总量变化幅度不大,但是核电和水电在电力供应中所占比例较小。     

广东省电机能效提升工作实践

电机能效提升是广东省后"十二五"时期的节能重点工作之一,结合国家先后发布的高耗能机电设备淘汰目录,广东省于2013~2015年实施电机能效提升计划,三年共完成1214万kW电机的改造任务,在全社会能源节约、碳减排以及企业转型升级等方面取得了巨大的效益。     

广东省节能技术服务中心在广州成立

经广东省经委批准:“广东省节能技术服务中心”于今年九月一日在广州正式成立。该中心在广东省经委的直接领导下,根据本省能源特点和国民经济建设的需要,负责统筹、协调、指导全省工交、财贸系统有关节能方面的近期规划,能量平衡测试,技术改造,新技术的引进、推广、应用,能源的科学管理和节能方针、改策、法规的贯彻     

对广东省热电联产集中供热发展的探讨

阐述了广东省热电联产集中供热的现状与特点,通过分析广东省热电联产集中供热发展的必要性、节能减排与经济社会效益,以及发展的有利条件,探讨并提出了广东省热电联产集中供热发展的方向与措施建议.     

易事特喜获广东省和东莞市科技进步奖

11月3日,东莞市科技奖励大会在国际会展中心举行。易事特自主开发的"基于DSP的带功率因数校正绿色节能工频不间断电源"荣获广东省科技进步奖三等奖,"高效光伏并网逆变器"荣获东莞市科技进步奖二等奖。易事特喜摘省、市两项大奖,彰显出公司强大的科研实力与创新能力。     

广东热力市场发展分析

近年来国家和广东省出台了一系列政策,鼓励在条件成熟的工业园区或工业集聚区发展集中供热,提高机组能源利用效率,实现节能减排,促进低碳发展和热力市场健康有序发展。文中初步调研了广东省供用热现状,结合广东省的经济发展、产业发展、区域发展、能源发展,科学合理预测了未来广东省的用热需求,考虑到集中供热的多层影响因素,提出了广东省集中供热的建议。     

案例研究81:科瑞莱节能环保空调的应用

<正>案例研究目的通过对广东省东莞凌力电池有限公司应用科瑞莱节能环保空调节能项目的研究,着重从产品性能、运行效果和经济效益及市场潜力等方面分析其推广应用的可行性和必要性。项目总投资广东省东莞凌力电池有限公司在建筑面积为2460m2的电池生产车间改造过程中,安装了12台科瑞莱节能环保空调机,工程总投资15．6万元。     

Micro-scale investigation on particle transformations of coal and biomass ashes during different heating conditions

Changes in heating conditions might influence ash transformations during the gasification process. Ash transformations by thermal effects result in particle stickiness, which affects particle sintering and shrinkage. In this study, an optical heating stage microscope (OHSM) was used to clarify the ash particle transformations that occur during non-isothermal and isothermal heating conditions at micro-scale magnification. The value of change of surface area increased during the sintering process but then generally started to decrease during the melting process. In terms of reaction time exposed during non-isothermal heating, higher heating rate influenced the change of surface area more than lower heating rate during the sintering process. The sintering activation energy (E_sin) under non-isothermal heating conditions was compared to shrinkage during the sintering process. The value of E_sin increased with increasing shrinkage and decreased at high heating rates. The sintering transformation of ash under non-isothermal heating conditions was improved in comparison with that under isothermal heating condition. From scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX) analysis, the morphology of particle surface was observed to change to a smooth shape and the chemical components on particle surface were replaced during sintering.     

排气门正时对柴油机冷起动性能的影响

通过在一台单缸直喷柴油机上进行实验,分析了不同排气门正时条件对柴油机冷起动过程燃烧及排放性能的影响.结果表明,通过调节排气门关闭正时,适当增大缸内残余废气量,可显著改善起动过程初始着火循环的着火燃烧性能和提高起动过程缸内燃烧的稳定性.不同排气门关闭条件对起动过程的排放有着非常重要的影响.适当提前排气门关闭时刻,可以显著降低冷起动过程的烟度排放,特别是降低冷起动过程初始阶段的烟度排放.而对于NO2排放,由于残余废气具有很强的热效应,随着排气门关闭时刻提前,Nox排放呈上升趋势.     

进气温度对直喷式柴油机冷起动初始期燃烧和排放的影响

为了研究进气温度对柴油机起动过程燃烧不稳定性和排放的影响规律,利用柴油机起动过程燃烧、排放测控系统,在一台直喷式单缸柴油机上进行了试验。试验结果表明：进气温度对柴油机冷机起动过程初始期燃烧有较大影响,随进气温度的升高,冷机起动着火滞后期明显减小,扩散燃烧增加。提高进气温度能够明显改善着火条件,降低起动过程供油量,减少失火循环,从而明显改善起动过程中的HC排放。     

柴油机相继增压切换过程阀门耦合控制研究

为解决相继增压系统切换过程中压气机喘振和倒流问题,建立了GT-Power/Simulink相继增压系统耦合仿真计算模型,并对切换过程压气机动作延迟时间的影响规律进行研究。仿真结果表明:压气机延迟关闭可以避免压气机的喘振现象;压气机延迟开启可以避免压气机的倒流现象。合理的阀门控制策略可以使切换过程增压压力的波动减少9.3%～21.6%。     

Variation of discomfort with south window area and insulation on walls/roof

Dependence of the discomfort index on the south window area and the cost of optimally distributed insulation over the walls and roof (corresponding to different available investments) of a non-air-conditioned one room building is investigated. It is assumed that, in the winter, the wooden shutters provided in the window are opened during the day and are closed during the night, and that, in the summer, the shutters are closed during the day and are opened during the night. It is seen that the discomfort decreases with increasing window area and an increasing amount of insulation.     

双燃料发动机天然气逃逸的仿真研究

以Z6170型柴油机改造后的进气总管喷射进气柴油/LNG双燃料发动机为研究对象,在Fluent软件环境中,运用动网格技术模拟气门重叠期天然气逃逸过程,定量分析转速、进气提前角和排气迟闭角对双燃料发动机气门重叠期天然气逃逸的影响。仿真结果表明:进气总管喷射进气双燃料发动机气门重叠期存在天然气逃逸现象;在其他条件相同的情况下,发动机转速升高,一个工作循环内气门重叠期CH_4逃逸量减少;气门重叠角大小对气门重叠期CH_4逃逸的影响最大,特别是进气提前角影响尤为突出。     

City-block-scale sensitivity of electricity consumption to air temperature and air humidity in business districts of Tokyo,Japan

The sensitivity of electricity consumption to air temperature and air humidity are effective indicators in evaluating the impacts of countermeasures against urban heat islands. The impacts of these countermeasures vary in time and space and so sensitivities based on finer resolution data are needed. Using actual hourly electric power consumption data from the business districts of Tokyo, we calculated the sensitivity of electric power consumption using multiple regression analysis. The sensitivities appear from 07:00 to 23:00 local standard time (LST) during weekdays during both winter and summer, mainly from 09:00 to 17:00 LST. The sensitivities to air temperature during winter are approximately 0.7–1.1 (W/floor-m²)/°C on an average and those during summer are approximately 1.1–1.4 on an average; the sensitivities to air humidity are approximately 0.6–0.9 on an average. It was found that the sensitivities to air temperature are caused due to heating during winter and cooling during summer; further, the sensitivities to air humidity were caused by dehumidification not for conditioning the air humidity of the room but for the condensation around the air-conditioner's coils with cooling during summer.     

Heat management in aluminium/air batteries: sources of heat

One of the problems with the aluminium/air battery is the generation of heat, during both idle and discharge periods. The main sources of heat are: (i) corrosion of the aluminium anode during the idle period; (ii) inefficient, or less efficient, dissolution of anode during discharge; (iii) Joule heat during discharge, and (iv) non-uniform mass transfer during both dicharge and idle periods. These components of heat act in a cumulative way because they are all interconnected. This paper addresses the basic reasons for the origin of these sources of heat. Suitable and practical remedial measures for the effective removal of such heat in the aluminium/air battery are suggested.     

Time dependent model of a complex PV water pumping system

A complex time-dependent solar water pumping system is analysed in this paper. Several existing models (e.g. for the PV cell, the battery and the assembly electric motor—centrifugal pump) are used. New models are proposed for PV array and water storage tank operation. The system has two main operating modes, which depend on the level of the incident solar global irradiance. The mathematical model consists of systems of eight or five ordinary differential equations, as a function of the operating mode. Using a water storage tank improves the stability of PV pumping system operation. The mechanical power stored in the water tank is rather constant during the year. The fraction of collected solar energy that is stored in the water’s gravitational energy is higher during the winter months, during the cloudy days and around sunrise and sunset. It is smaller during the summer months, during the clear sky days and in the middle of the day. The fraction of the power supplied by the battery that is stored in the gravitational energy of water is almost constant during the year.     

水煤浆与煤粉燃烧脱硫比较

以煤代油是能源工业的发展方向。作为新型代油燃料,水煤浆有广阔的应用前景。从硫析出特点、脱硫影响因素（温度、Ｃａ／Ｓ比）以及烟尘排放等方面,研究了水煤浆燃烧脱硫与煤粉燃烧脱硫的异同。试验结果表明水煤浆燃烧脱硫优于煤粉,是值得推广的脱硫技术。