船舶热力蒸汽压缩海水淡化装置性能分析

介绍船舶热力蒸汽压缩海水淡化装置的工作过程,建立应用降膜蒸发技术的并流热力蒸汽压缩多效蒸发海水淡化系统数学模型,并给出相应解法。以一个淡水产量为110 kg/h的四效并流热力蒸汽压缩海水淡化装置为例,计算分析加热蒸汽温度和效数对装置性能的影响。结果表明:加热蒸汽温度提高时系统性能系数下降,传热面积和冷却水流量减少;效数增加时,系统性能系数提高,冷却水流量减少,装置传热面积增加。     

改性铝合金在蒸馏法海水淡化装置的初步应用研究

选用阳极氧化和TiO2纳米颗粒填充聚氨酯涂层的铝合金管作为水平管降膜蒸发器的换热管.考察了海水喷淋密度、改性方式、海水蒸发温度对水平管降膜蒸发传热特性的影响,分析了铝合金的耐腐蚀性和抗垢性.实验结果表明,随着海水喷淋密度和蒸发温度的增加,降膜蒸发传热系数先逐渐增加,随后趋于稳定;阳极氧化铝合金的传热系数高达13 000 W/m2·℃,表面氧化层可以抑制碳酸钙的成核与生长,但换热管表面出现少量点蚀;有机涂层铝合金的传热系数达到11 000 W/m2·℃,表面未发现海水腐蚀和难溶盐的结垢.     

波形竖管降膜蒸发流动与传热性能的理论研究

本文简介波形竖管降膜蒸发流动与传热的过程,通过理论分析建立波形竖管降膜蒸发传热的数学模型。采用国外一些研究者得到的理论分析与实验结果,利用无穷泰勒级数将含有多重积分的数学模型展开,得到简单实用的半经验——半理论数学模型解析式。     

挽用Ⅱ4—2型海水淡化装置盐度高故障的分析与排除

海水淡化装置用于补充动力装置的给水储备，以及用于制造饮用水和洗涤水的原料水。目前海军舰艇上海水淡化主要有化学脱盐、电渗析、反渗透、热力蒸馏等方法。以蒸汽为动力的舰艇现都采用热力蒸馏法获得炉水。炉水盐度高是海水淡化装置经常出现的一种故障。高盐度炉水会直接、间接地对锅炉金属产生破坏作用，在容器和蒸发管束内表面生成盐酸和盐类沉淀物，引起锅炉腐蚀。     

舰用Ⅱ4-2型海水淡化装置盐度高故障的分析与排除

海水淡化装置用于补充动力装置的给水储备,以及用于制造饮用水和洗涤水的原料水。目前海军舰艇上海水淡化主要有化学脱盐、电渗析、反渗透、热力蒸馏等方法。以蒸汽为动力的舰艇现都采用热力蒸馏法获得炉水。炉水盐度高是海水淡化装置经常出现的一种故障。高盐度炉水会直接、间接地对锅炉金属产生破坏作用,在容器和蒸发管束内表面生成盐酸和盐类沉淀物,引起锅炉腐蚀。因此,控制新造炉水盐度对锅炉的安全和使用寿命至关重要。本文结合笔者多年实践经验试通过对某型II4-2型海水淡化装置经常出现新造水盐度高的故障进行分析,研究和探讨解决新…     

船舶机械蒸汽压缩海水淡化装置性能分析

在分析机械蒸汽压缩海水淡化装置工作过程基础上,给出了该型装置的数学模型。以产水量5 t/d的装置为例,分析了装置工作性能随蒸发温度的变化规律。结果表明,随着蒸发温度的提高,产水量增大,压缩机耗功相应增大。     

低能耗的海水淡化法

本文介绍以垂直管蒸发和多级闪发相结合方式为工作原理的海水淡化流程.这个新研制成功的、结构紧凑并采用全焊接法的钛板热交换器可以把长、宽、高各为2.5×3.2×34米的压力柜垂直布置成55级.该淡化装置的淡水产量为5000米~3/天,造水比>40(每吨蒸汽产生的淡水量).     

流体薄膜强化传热技术的发展

本文介绍了流体薄膜强化传热－液膜蒸发－冷凝传热的优点和当今世界的最新水平、主要研究成果，及其在海水脱盐装置中的应用。列举了各种型式高性能液膜蒸发－冷凝传热管及其特性数据。     

船用真空蒸馏式海水淡化装置性能分析

针对目前船舶上广泛使用的真空蒸馏式海水淡化装置,建立海水淡化装置的数学模型,并以4 t/d真空式海水淡化装置为例,通过对不同的加热水温度、加热水流量及不同的蒸发压力进行模拟计算,得出真空蒸馏海水淡化装置性能变化规律,从而为该装置的使用管理提供依据.     

便携式海水淡化设备

英国“恢复工程”公司最近研制出一种利用逆渗透膜,从而能把海水过滤为饮用淡水的小型手工设备。该公司研制的这种海水淡化设备只有10%的海水能够通过逆渗透膜而被淡化。即如果要获取1升淡水,必须对10升的海水进行加压。90%的盐水会被过滤掉。由于海水在该装置的水泵中反复过滤,因此只需要很     

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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33rd International Conference on Ocean,Offshore and Arctic Engineering （OMAE2014）

正San Francisco,California,June 8-13,2014.OMAE 2014 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;·to exchange ideas and experiences whilst promoting technological progress and its application in industry·to promote international cooperation in ocean,offshore and arctic engineering.In line with the tradition of excellence of previous OMAE conferences,more than 900 technical papers are planned for presentation.Outreach for Engineers Specialty Forum This Specialty Forum is designed for students and professionals who may not be familiar with the Ocean and Offshore industry,as well as those who have just recently specialized in this field.     

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。     

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.     

The 11th International Conference on Hydrodynamics (ICHD 2014)

正19–24 October 2014 SingaporeCONFERENCE THEMES The overall aim of the ICHD Conference is to provide a forum for participants from around the world to review,discuss and present the latest developments in the broad discipline of hydrodynamics and fluid mechanics.The first International Conference on Hydrodynamics(ICHD)was initiated in 1994 in Wuxi,China.Since then,9 more ICHD conferences were held subsequently in Hong Kong,Seoul,Yokohama,Tainan,Perth,Ischia,Nantes,Shanghai and St Petersburg.Evidently the ICHD conference has become an important event among academics,researchers,engineers and operators,working in the fields closely related to the science and technology of hydrodynamics.The 11th ICHD will be held in Singapore in 2014.     

第十二届深水操作会议和展览会(英文)

正November 4-6,2014Moody Gardens HotelConvention Center/Galveston,TX The Deepwater Operations Conference and Exhibition is celebrating its 12th anniversary this year.This growing event will continue the tradition of excellence in addressing operational challenges involved in developing deepwater resources.We will return to the Moody Gardens Hotel and Convention Center on November 5-7,2014 in Galveston,Texas.     

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）.     

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.     

某海港码头的撞损修复

依据码头撞击受损区域调查检测结果,对受损构件提出合理的修复方案,为码头的安全运行提供保障。