制氢装置产品氢气储存及供氢的自动控制

实现产品氢气的自动充罐及向用户的自动供氢,可为制氢装置的无人值守提供必要的技术支持.本文对产品氢气自动控制提出了一个较完善的实现方案,用最低的生产成本来实现产品氢气储存及供氢的自动控制.     

氢氧化学链消氢装置的研发

本文利用氢氧化学链消氢技术,基于铜基载氧体,研究不同启动温度,不同空速下消氢效率。根据最优参数设计出1 kW化学链消氢装置,运行结果表明,氢气去除率达到100%,完全能够消除40 kW燃料电池的尾氢。     

氢能设备在港口应用的思考

一、背景 氢能源以氢气作为能源载体,由于其不管是直接燃烧还是采用电化学转化,产物只有水且能量转化效率高,加之具有来源丰富等优点,被誉为21世纪最具发展潜力的二次能源.燃料电池现已特指将氢气的化学能直接转化为电能的装置,具有转换效率高、零排放等特点,是最佳的氢能利用技术.     

核电站严重事故下氢气浓度测量装置

福岛事故中氢气爆炸对全球核电厂安全提出了严峻挑战。因此,加强对安全壳内氢气浓度的监测变得非常重要。为了提高中国在役和在建核电厂的核安全水平,中国国家核安全局颁布了《福岛核事故后核电厂改进行动通用技术要求》。本文以通用技术要求为依据,具体分析了严重事故后氢气监测系统的功能和设备要求、存储和布置要求,同时对两种安全壳氢气浓度测量技术,即直接测量技术和抽出式测量技术进行了论述和比较。本文特别提出,中船重工第七一八研究所采用直接测量技术,成功研制出适用于严重事故下使用的CH-15型安全壳内氢气浓度测量装置。氢气传感器具有自主知识产权,采用催化原理,安装在安全壳内。装置特点是测量范围宽、测量精度高,可实现多点连续测量。该装置组成简单、体积小、能耗低,适用于国内外已运行和在建核电厂进行技术改进及加装。     

非能动氢气复合装置的开发设计

非能动氢气复合装置是核电站发生严重事故时用于消除安全壳内氢气的安全设备之一。我们提出采用催化消氢的原理,利用新研制的全金属型催化剂消除氢气,并利用反应热,以温度梯度为推动力,非能动地进行反应。该方法不仅适用于核电站超设计基准事故下消氢,还适用于设计基准事故下的消氢。其他场合下的消氢也可选用。     

安全壳内氢气浓度测量技术及其应用综述

对当前世界各国核电行业采用的安全壳氢气浓度测量技术和相关产品进行综合论述,并指出由于严重事故工况条件的特殊性,一些技术和产品还需改进和完善。最后,对中国自主研发的CH-15型安全壳氢气浓度测量装置进行简要介绍。随着核电行业对核事故认识的不断深入,先进的氢气浓度测量装置必将大量应用于世界各国的核电厂。     

常规潜艇燃料电池AIP系统氢源技术应用研究

为了解决常规潜艇燃料电池AIP系统在密闭、狭小空间内安全、可靠、高效存储或制备氢气的问题,根据潜艇的特点以及作战需求,在简要分析工业上常用储氢和制氢技术的基础上,综合比较了各种氢源技术方案的装艇优缺点,提出了一种适用于常规潜艇燃料电池系统的氢源技术——NaBH4水解制氢.     

潜艇蓄电池充放电过程释放氢气规律研究

潜艇用铅酸蓄电池充电过程中由于要发生电解水的副反应,因此会释放出大量的氢气.众所周知,氢气是易燃易爆气体,当氢气在空气中含量达到4.65%～70%时,遇火便会发生爆炸.本文介绍了蓄电池产氢原理,铅酸蓄电池充电过程中氢气的采集和检测,通过实验得到了整个充放电过程中氢气释放量的变化规律,并对实验结果进行了分析.     

储氢合金的开发与利用

金属氢合物即储氢合金能有效地储存氢气并在需要的时候释放出来，既安全又可靠，为氢能的有效利用如用氢作燃料、燃料电池、化学蓄热和化学热泵及氢气的纯化、低质热能回收等方面提供了必要的保证。本文介绍了储氢合金储存和释放氢气的原理和方法以及存在的技术难点和解决方法，指出了这种方法广阔的应用前景。     

核电站用氢点火器的应用研究

氢点火器作为第三代核电站AP1000中的主要消氢设备,可防止核电站发生严重事故后氢气大面积的燃爆,维护安全壳的安全性和完整性.介绍了核电站用氢点火器的特点和工作原理,以及国内外氢点火器的发展状况.认为如能开展氢点火器的研发,不但可以提高我国在材料、化工、自动控制、测温、测氢等多个行业和领域的创新力,而且可以打破其他核电大国在点火器消氢领域的垄断地位,拓宽我国核电产业的发展空间,必将为提高我国核电设备的国产化和核电事业的发展打下坚实的技术基础.     

Errata

正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors.     

Journal of Marine Science and Application 2014 Sum. Contents

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第34届海洋、离岸及极地工程国际会议(英文)

正St.John's,Newfoundland,Canada,May 31-June 5,2015 OMAE2015 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to: meet and present advances in technology and its scientific support;     

联合作战计划和执行系统

全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划：时间不限的精密预案计划生成作战计划、方案计划或职能计划；时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础，加速应付危机的能力。     

Eastbound or westbound ?

In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama？
The answer is China South Port Group （Hong Kong, Shenzhen and Guangzhou）.     

Recent progress on wave induced loading measurements in warships

Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form.     

桥梁防撞设施物理模型试验

物理模型试验是预报防撞设施所受撞击力及优化设计方案的主要方法之一。结合杭州湾大桥柔性防撞设施及东海大桥独立式防撞体设计方案,阐述了船—防撞体撞击试验的基本原理、方法、试验方案及相关试验结果。提出了柔性防撞系统的优化方案。试验结果表明,该方案经济有效,可供预报类似桥梁防撞设施撞击力时参考。     

印尼某电厂码头水工建筑物设计

印尼某电厂项目码头水工建筑物包括码头、防波堤和护岸等主要组成部分。在该项目水工建筑物的设计过程中,综合考虑当地的自然条件、施工能力和材料来源等因素,不断优化结构选型和结构断面。根据不同使用要求,护岸分别采用直立式和斜坡式2种结构型式,推荐的设计方案节省投资、施工方便,可供同类工程设计参考。     

Impact of regulation on the performances of long-distance transport services: A comparison of the different approaches in Sweden and Norway

Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues.     

开放式数据挖掘系统模型

目前国内已经出现了少量的数据挖掘相关产品。国内数据挖掘软件无论从数量还是质量上比较，都与国外软件存在着较大的差距。随着数据仓库技术的普及，数据挖掘应用的需求越来越强烈，如何缩短这种差距，研发数据挖掘软件产品成为国内业界的一个重要问题。通过引用目前国际通用数据挖掘标准技术来构建开放式的数据挖掘系统模型，该系统模型从可扩展性、可重用性、易用性等方面得到了加强。