LNG燃料动力船在广西内河推广应用的思考

文章分析了液化天然气(LNG)在航运业推广应用的必要性和以LNG作为船舶动力燃料的主要危险特性,介绍了国内外LNG燃料动力船改造应用的基本情况及难点,提出了广西内河现有船舶进行LNG动力改造面临的主要问题与对策,为LNG燃料动力船在广西内河的推广应用提供参考。     

新技术新工艺

正多能源游览船舶综合电力推进系统研发成功由集美大学承担的交通运输部应用基础(主干学科)研究项目"多能源船舶电力系统能量动态规划及控制策略研究"通过验收。项目采用太阳能、锂电池组及柴油发电机,结合电力推进技术,对三种不同应用环境下多能源电力系统的拓扑结构进行研究,提出了多重冗余技术和电压均衡技术的电池能量管理系统,设计了基于逻辑门限值的能量分配控制和动态规划调度策略,开发能量动态管理和控制系统,采用工业网络技术和信息技术,研发了太阳能船舶综合监视与报警系统,以及多能源游览船舶综合电力推进系统集成技术。项目研发的具有自主知识产权的     

我国动力锂电池行业现状和发展趋势

作为新能源汽车核心部件之一的动力电池,随着新能源汽车行业的崛起迅速发展起来。文章对动力锂电池的应用现状、市场规模、产业链布局等情况进行分析;结合现状,对动力锂电池的制约因素和先进技术进行展望。     

锂电池动力系统在轮胎吊产品中的应用

本文介绍了大容量锂电池在RTG上的应用,阐述了锂电池动力系统的工作原理。通过与传统轮胎吊进行对比,验证了用多组高功率组锂电池串联和一个小功率柴油发电机组组成的轮胎吊锂电池动力系统取代传统轮胎吊上的大功率柴油机组可以获得很好的节能减排效果,大幅降低运营成本。锂电池动力系统对硬件设备要求不高,具有宽广的应用前景。     

光宇国际4月连获订单

中国锂离子电池最大供应商之一的哈尔滨光宇4月10日获得了恒通客车20个铁锂电池系统订单,19日,该公司又获得了为广汽供应14个铁锂电池系统订单。     

光宇国际4月连获订单

中国锂离子电池最大供应商之一的哈尔滨光宇4月10日获得了恒通客车20个铁锂电池系统订单，19日，该公司又获得了为广汽供应14个铁锂电池系统订单。     

伊顿宣布多项改进方案

多元化的工业产品制造商伊顿公司近日宣布多项改进方案,以全面提升其商用车混合动力系统的燃油经济性、动力性以及系统投资回报率。这些改进方案包括采用新型的高容量电池、新型单相115伏交流辅助发电机(Auxiliary Power Generator,以下简称APG)、将扭矩扩展到1165Nm的高性能离合器以及面向售后市场的新型再生蓄电池。新型高容量锂电池的核心是采用了最新技术的电池单体结构设计。新的设计将伊顿混合动力系统的节油率再次提高了     

电动自行车用氢燃料电池动力系统研究

论文研究开发了一种"电电"互混的电动自行车用氢燃料电池动力系统,旨在通过将燃料电池与一种具备瞬间大电流放电能力的储能设备连接,使得电动自行车用氢燃料电池动力系统在具备长航时、快速充装特性的同时,具备良好的爬坡与加速性能。文章提供了该电动自行车用氢燃料电池动力控制方法、电动自行车用氢燃料电池动力控制装置及包括该电动自行车用氢燃料电池动力控制装置的电动自行车用氢燃料电池动力系统,解决相关技术中存在的燃料电池的动态响应能力弱过载能力差的问题。     

重庆市内河船舶污染物排放现状及LNG动力船舶推广效益分析

重庆地处长江上游经济带核心地区,水运发达,随着客货运量逐年增加,通行的内河船舶尾气排放严重影响港口及航道附近大气环境,已成为重庆大气污染的主要来源之一,颗粒物、NO_x的排放分别占重庆市总排放的4.3%、21.9%,SO_2占年排放的7.4%(14.8%。在大气环境问题日益严峻的情况下,LNG动力船舶因其可明显降低排气污染物,越发受到社会关注,对重庆市单LNG动力示范船舶尾气排放进行实测,对比柴油动力船舶,颗粒物、NO_x、SO_2减排显著,减排率分别达99.94%、72.69%、100%。因此,LNG动力船舶的推广表现出明显的环境效益,同时,综合分析了当前LNG动力船舶推广存在问题及困难。     

18650型锂离子电池含电量与空运危险性关系研究

为确定锂离子电池在航空运输中安全性能最佳的含电量区间,对不同含电量的18650型锂离子电池利用实验平台加热进行热失控测试。观察不同含电量电池热失控现象,记录其实验现象与数据。对锂离子电池含电量与其初爆时间、实验结束时间和爆炸时长,分别进行统计分析并回归拟合,得出函数图像及其表达式。分析图像发现含电量越高,电池危险性越大,并且初爆时间在含电量为32.67%之后变化明显。结合实验分析结果及现实需求,得出18650型锂离子电池航空运输的最佳含电量区间为小于等于30%的结论,研究结论可为民航锂离子电池及其设备的安全运输提供科学依据。     

A three-stage decision-making model for selecting electric vehicle battery technology

This study proposes a three-stage decision-making model for the selection of electric vehicle battery technology. Data used for analysis include surveys completed by 45 technology experts from industry, academia, and research throughout Taiwan. A three-stage model that includes developing multiple-criteria during the first stage, integrating the importance of criteria assessment using the fuzzy analytical hierarchy process in the second stage, and using patent analysis tools to further identify the patent portfolio of the technology selected by experts in the third stage are employed. The empirical results indicate that power source management technology and battery module technology are the key technologies for development by the electric vehicle industry. Battery energy storage management and cooling technology are found to be the key for building patent portfolios. When faced with substantial technical and market uncertainty, multiple-criteria for research and development (R&D) selection and stage-wise integration of decision tool must be employed by battery firms to effectively allocate the resources for R&D decisions.     

船用燃气轮机动力装置技术特点研究及发展趋势展望

文章介绍了燃气轮机应用于船舶动力装置的技术特点与应用情况,重点阐述了其主要面临的技术问题,并对其未来技术发展趋势进行了展望。就目前而言,尽管我国船用燃气轮机的技术水平相比世界先进水平仍有一定的技术差距,但随着相关技术及制度的不断优化及完善,终将得以迎头赶上。     

Electrical characteristics of cold ironing energy supply for berthed ships

The reduction of emissions in harbours is of particular importance due to the proximity to human habitation. Vessels normally run onboard generators, typically using diesel fuel, to provide the service loads while berthed. New and upcoming regulations aim to decrease emissions from shipping, and coupled with increased environmental consciousness of ship owners and harbour operators, shore supply is becoming a more popular and feasible option. Cold ironing provides an alternative locally emission-free solution by having berthed ships plug in to the shore electrical network, such that the onboard electrical energy demand is supplied from land. Electrically, a number of different shore network topologies are possible, providing different infrastructural options of supplying power to multiple berths. This paper examines the electrical characteristics of one such installation and the impact on the shoreside electrical network for an existing port using actual visiting ship power profiles. The paper examines how the cold ironing system influences important electrical network characteristics such as bus voltages and power quality, as well as the potential impact on the rest of the utility distribution system.     

电力推进技术在渡船中的应用

近年来,国家陆续出台了关于长江生态保护的相关文件。随着电力推进技术在节能减排方面的优势显现,常规动力渡船存在的问题显而易见,如较长传动轴增加了能量损耗,降低了能源效率;柴油机的响应较慢,影响船舶的机动性;柴油机的燃烧不充分导致燃油的过多消耗,以及柴油机直驱渡船的动力推进装置占据了机舱的大部分空间。本文结合电力推进渡船的应用情况,针对上述常规推进渡船的缺点,对船舶动力系统进行了改进,采用全回转电力推进取代原先柴油机直驱,电站采用高压共轨电喷式柴油机带动发电机发电,经整流实现直流组网后,统一为全船提供动力和日常用电。     

Power unit ‐ Cargo space link in inland waterway navigation

This paper deals with transportation technology regarding links between power unit or motor ship and ship cargo space. These links can be divided into two groups: rigid and flexible. Rigid link, established between power unit and cargo space, is dominant in maritime and road transport (sea ships and trucks), and occasionally in transport on inland waterways (self‐propelled barges). Flexible link is used in railroad transport (between the locomotive and railroad units), partially in road transport (systems with trailers and semitrailers), and in inland waterway transport (push‐towing, pulling systems and combinations of these systems). The main goal of this research is determination of possible link types and organization of fleet for transport on inland waterways in case of flexible link.     

Operational profiles of ships in Norwegian waters: An activity-based approach to assess the benefits of hybrid and electric propulsion

Various regulations are imposed on shipping to increase energy efficiency and reduce environmental impacts. Alternative fuels and power systems are among the solutions for compliance with these regulations. The power system of a ship may not operate optimally because of the diversity of the operational profile during its lifetime. This article uses an activity-based approach and big data from the Automatic Identification System (AIS) to study the operational profiles of eight ship types operating in Norwegian waters around mainland Norway in 2016. The aim is to identify ship types that can benefit from electric and hybrid propulsion through analysis of their operational profiles. Close to shore, the operational profiles of various ship types are similar, and all ships spend a great proportion of their time with lower loads. As the distance from shore increases, the operational profiles of various ship types follow distinct trends. Among the considered ship types, reefers spend more operational time close to the diesel engine design condition. On the other hand, offshore and passenger ships show the most dynamic operational profiles and spend a large percentage of their operational time with a partial load, away from diesel engine design conditions. Such ships can benefit from hybridisation, diesel-electric propulsion, and other electric concepts, such as batteries and fuel cells. Another option is to downsize diesel engines for better operation while fuel cells and batteries supply peak and partial loads. Operational profiles are plotted and details of the approach are presented in the article.     

油气长输管道节能技术研究

为了解国内外节能技术应用的现状,更好地采用节能技术以不断降低管道能耗,对比了近年来国内外油气长输管道在输送工艺、运行设备及新能源3个方面的各种节能技术。结果表明：油品输送减阻剂技术、含蜡原油降凝剂技术、天然气管道减阻剂技术、输油泵变频调速技术、超声波防/除垢技术以及太阳能阀室供电等技术在油气长输管道上的应用有着明显的节能效果。因此,开发并利用新的节能技术,特别是新能源技术,将是油气长输管道节能降耗发展的方向。     

超级电容器对航标能源发展的影响

能源是社会和经济发展的重要物质基础,也是提升人们生活水平的先决条件。作为保障助航标志正常工作的重要动力,航标能源经历了从非电能源到电能能源的历史性演变。目前,航标能源的供电方式主要是太阳能电池+蓄电池的模式,但是太阳能电池板也存在着发电效率低,受气候环境因素影响大等诸多问题。