Enhanced Heat Transfer Software Available
Enhanced Heat Transfer Software Available
HTRI Negotiates Exclusive Worldwide Distribution Rights to Useful New Program
Heat T ransfer Research, Inc. has negotiated the exclusive worldwide distribution rights to Enhanced Heat T ransfer (EHT), written by John R. Thome. EHT , a software package for calculating the thermal and hydraulic
performance of a variety of enhanced-surface tubes and inserts, will be available to all HTRI members and participating affiliates at a discounted rate. Companies that are not HTRI members also may license EHT .This Microsoft Windows-based program has been
designed to provide quick and reliable calculations to aid in the design and rating of high-performance shell-and-tube, double-pipe, and hairpin heat exchangers.EHT is suitable for use with standard heat exchangers,and also with refrigeration and HVAC systems utilizing most common refrigerants including R11, R12, R22,R123, R134a, R142b, R152a, and mixtures. The meth-ods used for these calculations, as with all HTRI soft-ware, are based on research data.
The tube and insert types available for modeling include ?plain tubes
?corrugated/fluted tubes ?ribbed tubes
?coiled wire mesh inserts ?helically coiled wire inserts ?twisted tape inserts ?aluminum star inserts ?porous metallic coatings ?
bent saw-tooth fin tubes
and many others. Modeling methods cover single-phase intube flows, condensation of pure vapors, and boiling of pure fluids and mixtures.
To order this new software tool, which will be released in August 1997, contact HTRI Product Distribution (contact information is located on the back cover).
Corporate News
Visit HTRI on the web at https://www.sodocs.net/doc/437652191.html,
HTRI-Net One Year Old
HTRI-Net, the online information resource for HTRI customers and
industry professionals, marked its first anniversary in March. As with the rest of the internet, use of the HTRI web site continues to increase worldwide.One year ago, the web site averaged visits from 10 individual users per week.Today, that number is consistently over 150 users per week.
We continue to increase our use of this distribution medium, primarily to inform HTRI customers and potential customers of HTRI news, develop-ments, and events. Among the most accessed areas on the site are newsletter articles, and HTRI software information.
If your company is an HTRI member and has a web site, we’d like to place a link to it from HTRI-Net. Send your company’s web address to
webmaster@https://www.sodocs.net/doc/437652191.html,. These links are featured in the members directory located at https://www.sodocs.net/doc/437652191.html,/members/.
HTRI Celebrates 35th Anniversary
In July, HTRI will celebrate its 35th year of opera-tions. The event, to be held in Pasadena, California,promises to be a chance to reflect on HTRI’s global achievements over the last three-and-a-half decades—longer than any other organization of its kind. It will also provide an opportunity to look to the future as we continue to lead the industry in quality research and provide the most accurate, user-friendly, affordable heat transfer research and software products available anywhere in the world.
The anniversary celebration will be held during the HTRI 1997 Annual Meeting of Stockholders, July 28-August 1, 1997 at the Ritz-Carlton ?
Huntington Hotel in Pasadena. Registration information for this meeting will be mailed in May, and can also be found on HTRI-Net (https://www.sodocs.net/doc/437652191.html,).
Corporate News HTRI at Energy Efficiency Exhibition
IST Training in Europe
ACHEMA/Chem Show 97
HTRI will participate in the ACHEMA 97 trade show in Frankfurt, Germany, June 9-14, 1997. The show is held in conjunction with the 25th Exhibition-Congress International Meeting on Chemical Engineering, Envi-ronmental Protection, and Biotechnology. Over 3,000exhibitors representing 46 countries are expected to participate.
We will be located in Exhibition Hall 4.1, Thermal Processes, Booth #27. T rade show hours are:June 9 - 13, 19979:00 am to 6:00 pm June 14, 19979:00 am to 4:00 pm We also will exhibit at the 97 Chem Show in New York City, November 18-20, 1997. Visit us in booth 941 at the Javits Convention Center.
HTRI will conduct a one-day IST workshop on Mon-day, June 16, 1997, in Ulm, Germany. The workshop will be held at Wieland-Werke AG, who have kindly made available their training facility for this session. If you are interested in registering for this workshop, please contact Susan M. Edwards (see contact information on back cover).
HTRI exhibited with Argonne National Laboratory at the 2nd Energy Efficiency Symposium in Arlington, VA on February 24-26, 1997. This symposium and exhibit were sponsored by the Office of Industrial T echnology (OIT) of the U.S. Department of Energy. HTRI and ANL participated jointly to promote the need for fouling research and highlight how this research can provide significant benefits to the refining and petro-chemical industry.
Software Tips Refinery Fouling Mitigation Research
ANSI.SYS?
T o use certain HTRI software in interactive mode, you must be sure that the ANSI driver that comes with DOS and Windows is loaded (See “HTRI Software requiring the ANSI.SYS driver” at right ). While this driver is included in all Microsoft operating systems, it is not installed by default. The easiest way to tell if the driver is properly installed is by starting an HTRI program; if the main menu exhibits strange behavior such as quickly scrolling,illegible text or garbage characters, you probably need to modify your operating system’s startup configuration file.The examples below show how to load the driver for DOS, Windows 3.x, Windows 95, and Windows NT .For more specific information, see the documentation that came with the PC or contact your PC systems manager.Windows 3.1x/DOS
Edit file:C:\CONFIG.SYS
Add:
DEVICE=C:\DOS\ANSI.SYS
Windows 95
Edit file:C:\CONFIG.SYS
Add:
DEVICE=C:\WINDOWS\COMMAND\ANSI.SYS
Windows NT
Edit file:%SystemRoot%\system32\CONFIG.NT
Add:
device=%SystemRoot%\system32\ANSI.SYS
The paths listed above assume that the operating system
files are in their default installation locations. If you specified another location when installing the operating system, you will need to modify the specified paths to match the location you used.
Argonne National Laboratory (ANL) has contracted with HTRI to assist in developing an industry-supported five-year research plan to improve refinery efficiency by decreasing downtime and excess heat exchanger surface requirements due to fouling.
ANL and the U.S. Department of Energy (DOE) have stated that fouling is the leading reason for inefficiency in the U.S. refining and petrochemical industry. It is estimated that the amount of energy wasted due to
fouling is greater than 0.2 quads per year and the associ-ated annual cost is greater than two (2) billion dollars.To mitigate these losses, ANL is proposing to develop a five-year research program in cooperation with the American Petroleum Institute (API) and HTRI. The tasks assigned to HTRI are the following:
?identify and prioritize technical issues
?develop objectives, technical approach, and mile-stones for a five-year fouling mitigation program ?propose practical means to implement findings in refinery operation and future refinery design
?estimate the probable impact on refinery down time and new plant investment As a result of this contract, HTRI will prepare a five-year proposed research plan for submission to the Depart-ment of Energy.
Research News
Meetings
1997 Winter Meeting
HTRI held its 1997 Winter Meeting at the Ritz-Carlton ? Houston, February 17-21,1997 in Houston, Texas, USA. Over 130 members attended the meeting including representatives from Canada, Japan, Korea, Mexico, Taiwan, The Netherlands, and the United Kingdom.
During opening remarks on T uesday, HTRI President and Chief Executive Officer Claudette D. Beyer introduced Dr. Blazo Ljubicic, Director of Research, who was well received by the membership. Keynote speaker Dr. John C. Chen presented his AIChE Heat T ransfer and Energy Conversion Division Award lecture during lunch on Wednesday.
Attendees heard reports and updates from HTRI staff during the subcommittee
meetings. Our highly popular IST Workshop (see related story, page 3) was presented three times, with each session filled to capacity. Additional workshops are planned for the 1997 Annual Meeting of Stockholders.
Condensation of Multicomponent Hydrocarbon Mixture Tested on VICU
Condensation of multicomponent hydrocarbon mixtures with and without noncondensable gases has many applications in the chemical and petrochemical indus-tries. To study this process, HTRI conducted more than 200 data runs in 1995, condensing binary and ternary hydrocarbon mixtures on the Vertical Intube Condensa-tion Unit (VICU). Based on these data, we have im-proved HTRI heat transfer coefficient correlations.At the request of several HTRI members and the Con-densing Subcommittee, HTRI recently began testing a wide boiling range multicomponent mixture on the VICU to evaluate and improve current exchanger design methods. Phillips Petroleum Company donated the test fluids for a mixture with more than 80 components and a wide boiling range. These components can be classified in seven groups, based on their molecular weight:pentane (C 5), hexane (C 6), heptane (C 7), octane (C 8),nonane (C 9), decane (C 10), and undecane (C 11).Test pressure during data collection varied from vacuum (2.0 psia, 13.8 kPa) to 45 psia (310 kPa), and the con-densing flow regime from shear-controlled to gravity-controlled flow. Tests were also conducted with nitrogen and helium as noncondensable gases. These data will be very useful in evaluating and improving HTRI correla-tions for heat transfer and pressure drop in this type of application.
Research News
Corporate News Membership Update
New Members:
Ambassador Heat T ransfer Company Cincinnati, Ohio, USA
Brown Fintube France S.A.
Thonon-les-Bains, France
Contract Fabricators
Holly Springs, Mississippi, USA
GE Power Systems
Schenectady, New York, USA
Kinetics Technology International Corporation San Dimas, California, USA
Korea Heat Exchanger Ind. Co., Ltd. Kyungki-Do, Korea
SGL T echnic, Inc.
Strongsville, Ohio, USA
Shell and T ube, Inc.
Tulsa, Oklahoma, USA
Membership Renewals:
Alpha Project Services Private Limited Baroda, India
China T echnical Consultants, Inc.
T aipei, T aiwan
Struthers Industries, Inc.
Gulfport, Mississippi, USA New Participating Affiliates:
Kinetics Technology International BV (Zoetermeer, The Netherlands)
Member: Kinetics T echnology International Corporation Kinetics Technology International SpA (Rome, Italy) Member: Kinetics T echnology International Corporation Raytheon Engineers & Constructors (Downers Grove, Illinois, USA)
Member: Raytheon Engineers and Constructors, Inc. Raytheon Engineers & Constructors - Litwin S.A. (Puteaux, France)
Member: Raytheon Engineers and Constructors, Inc.
Subscription/Address Change To start your free subscription to The Exchanger, or change the address on your current subscription, please fill out this form and mail or fax it to HTRI.
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高清数字电视及互动服务系统方案介绍
高清数字电视&互动服务系统 解决方案 上海胤华电子有限公司
目录 项目背景 (3) 方案目的 (3) 设计思路 (4) 第一章：系统特点 (5) 1重点应用 (5) 1.1 主要应用之全高清 (6) 1.1.1 高清数字电视 (6) 1.2 关键应用之个性化 (7) 1.3 关键应用之互动 (8) 1.4 关键应用之酒店特性支持 (11) 第二章系统架构与功能 (12) 2.1 系统架构 (12) 2.1.1 呈现功能 (13) 2.1.2 系统管理后台功能 (15) 2.2 电视信号传输网 (16) 2.2.1 节目信源分析 (16) 第三章终端安装方式与安装要求 (19) 3.1 机顶盒隐蔽安装 (19) 3.2 电视机线缆连接 (19) 3.3 高清机顶盒 (20) 3.4 服务器安装与接口要求 (21) 3.5电视机系统整合要求 (22) 第四章系统维护 (24)
项目背景 目前随着下一代广播网（NGB）以及三网融合的工程推动，其中最核心的就是高清数字电视的推进；在逐渐满足家庭用户看电视、用电视的需求同时，作为高端酒店如何为客户打造一套数字化高清电视成为一大课题。并且随着高端酒店的业务发展需要。如何提高酒店的个性化、智能化与国际化内容服务，又是一件值得思考和研究的话题。 方案目的 基于酒店内部有线电视网络平台的基础上，迎合高端酒店智能化、个性化的需求，胤华提出的星级酒店高清数字电视系统专业方案，以全高清，全数字也设计宗旨，同时针对酒店行业特性，以改变服务模式，提升服务品质，优化客户体验为目标，打造一套高清数字与智能互动为一体的电视平台。
广电融媒体平台网络互动直播业务流程和系统架构设计
广播与电视技术 〔2018年·第45卷·第8期〕24热点 论点融媒体业务平台建设 ︳ Construction of Convergent Media Business Platform 广电融媒体平台网络互动直播业务 流程和系统架构设计 【摘 要】网络互动直播系统做为广电融媒体平台的一个SaaS 应用，通过重新定义生产流程、创新业务系统和工具，可以有效拓展并提升广电业务在互联网时代下的竞争力。本文将根据广电媒体的业务特点、行业背景和技术基础，并结合目前主流的产品设计思维和互联网互动直播技术，进行融媒体平台网络互动直播业务流程和系统架构设计，为从业者提供方案设计参考。 【关键词】网络互动直播，直播系统，融媒体，业务流程，架构设计 【中图分类号】 TN93/TN94 【文献标识码】 B 【DOI 编码】 10.16171/https://www.sodocs.net/doc/437652191.html,ki.rtbe.2018008002【本文献信息】蔡宏伍.广电融媒体平台网络互动直播业务流程和系统架构设计[J].广播与电视技术，2018,Vol.45(8). Interactive Live Broadcasting Business and System Architecture Design in Convergent Media Network Platform Cai Hongwu (Hubei Media Group ，Hubei 430070，China) Abstract As a SaaS application of convergent media platform, the interactive live broadcasting system effectively expands and enhances the competitiveness of radio and television business in the Internet era, by redefining production processes and innovating business systems and tools. According to the business characteristics, industry background and technical foundation of radio and television, this paper combines with the mainstream product design thinking and the Internet interactive live broadcasting technology, to propose a design of the business process and system architecture of the interactive live broadcasting system, which could be a reference for peers. Keywords Interactive live broadcasting in network ， Live broadcasting system ，Convergent media ，Business process ，Architecture design 蔡宏伍 （湖北广播电视台，湖北 430070） 0 引言 互联网直播行业的发展深刻的影响了视音频内容的服务 方式和用户习惯。对于广电媒体而言，已不再停留于讨论要 不要做网络直播的阶段，而是进入了实践和探索的阶段。 目前国内已有多家主流公有云平台，一批广电媒体也建 成了基于私有云的融媒体平台，对于广电媒体而言，是选择 公有云还是私有云来部署网络互动直播系统，可根据自己的 实际情况和业务需要来选择。但无论选择哪种部署方式，要 想满足不同地域不同运营商下用户能同时低延时、稳定流畅和高并发地观看直播流，其主流的实现方式是借助融合CDN 网络来进行分发。考虑到广电媒体自己搭建CDN 网络的成本、难度及合理性，本文建议采用第三方平台提供的CDN 服务。已建成私有云平台的的广电媒体，可将直播平台部署在私有云上。和部署在公有云上相比，私有云架构能够以更低的延时和更好的信号质量来满足台内电视节目直播连线的需要。同时，直播收录视频的共享再利用以及演播室直播信号的回调将更加高效和便捷，更好的满足内容融合生产的需要。另外，通过使用融合CDN ，将直播内容互联网发布时所面临的高并
基于IPQAM的互动点播技术探讨
基于I基于IPQAM的互动点播 作者：张峰来源：广播电视信息 【摘要】：本文先简述了几种近年来流行的广电和电信运营商采用的视频点播技术，然后详细介绍了广电运营商基于HFC网络的以IPQAM为核心设备的MEPG-2视频点播技术的实现方式,指出此点播方式是有线运营商值得大力发展与应用的视频点播技术。 【关键词】：VOD IPQA MuMG9820 1开展视频点播业务的必要性和意义 （1）随着用户对信息需求的逐步增长，已不满足单向的被动的接受信息，交互成为视频领域的发展方向。 （2）随着卫星直播电视，网络电视等新的视频传输技术的出现，传统有线电视的垄断优势不在，各网络运营商在视频传输领域的的竞争加剧。 因此网络运营商尤其是广电运营商需要积极开发VOD技术与应用，由此来增强用户的忠诚度，减少用户流失以及提高用户ARPU值（单用户平均价值）。 美国有线运营商Comcast对半年之内用户流失的报告显示，对于开通视频点播业务的用户，用户保持度为96%，而对于未开通视频点播业务的用户，保持度仅为82%。国内杭州等地开展视频点播业务的城市，有线用户的ARPU值从原来的14元每月提高到45元，对运营商来说是属于“杀手级应用”(killerapplication)。 2几种视频点播技术介绍 国内有线运营商因网络改造进度，与其他电信运营商的合作关系等情况不一，一般都采用NVOD(准视频点播)，BVOD（广播式视频点播），以太网VOD和IPQAMVOD等几种方式,它们之间的比较见表1。
（1）NVOD是将一部片子切成几个片段在一个模拟通道的几个逻辑通道中按一定的时间间隔进行循环播放，这样就可以使用户在点播节目时在响应时间内看到NVOD的节目播出。举例一部片子的时长为80分钟，素材的码率为4.5Mbps/s，传输带宽使用一个模拟通道进行传输。计算出在38M的数字带宽中可以划分4.5M的逻辑频道为8个 （4.5*8=36M），每个频道播出的间隔通过计算为10分钟，也就是说当第一个频道开始播出后10分钟第二个频道开始播放节目，10分钟后第三个频道开始播放节目，以此类推在第8个频道播出10分钟后第一个频道正好播完80分钟的节目,这样使用户在任意时间内点播时等待的时间都是在0-10分钟。 NVOD的优点是在单向的网络中即可实现，系统构架简单，设备投入少，缺点是比较浪费带宽，用户可以选择点播的内容数量也不多。 （2）BVOD技术是将一部片子按照特定的算法切分成很小的分组，分组的最小单位为一个Ts流的包长（188字节），STB将接收到的分组在硬盘中做缓存，将分组按算法拼装成片子，这样边传输边缓存，边拼装边播放，可以将用户的等待时间缩短到很小。 BVOD的优点是在单向网络中即可实现，相比NVOD，等待时间小，用户可以选择的片子也多，缺点是要增加STB的成本，非标技术，与CAS的集成也是一个比较突出的技术问题。 （3）NVOD和BVOD都是在没有上行通道的单向网络中实现，是用户与STB之间本地的交互，而真正的点播TVOD是用户与远端服务器之间的交互，目前主要有基于以太网的
互动电视平台系统架构
运营商如何选择IPTV、互动电视平台系统架构(1) (2009-10-20 09:26:34) 转载▼ 标签： 分类：互动电视 电信 视频服务器 iptv vod 前端 通道 杂谈 转自：https://www.sodocs.net/doc/437652191.html, 1、交互领航架构当先 以VOD业务和时移业务为代表的交互电视应用服务打破了传统广播用户被动收看电视节目的时空限制，使用户可以随心所欲控制节目的播放，抛弃了仅仅依靠数字键选择广播频道的收视方式，彻底颠覆了传统的节目消费习惯。 交互业务的发展，伴随着广电运营商自身体制和广播电视市场环境的变革，必定会带动广电行业服务模式的巨大转变。交互平台的建设是双向业务的一个开端，而交互平台的系统架构决定了后续交互业务的持续健康发展，是大规模商业交互平台的基石。因此交互系统架构的开放、灵活，将非常有利于广电运营商从单一的广播网络运营商，向综合运营商的平滑过渡和发展。 交互平台系统架构中，最为关键的是后台管理系统架构和视频服务体系架构，思华科技这篇文章对系统架构的探讨将围绕这两部分重点展开。 2、典型交互平台的系统架构 一个典型的交互电视系统的功能架构以及后台管理系统和周边系统的关系如下图所示，节目内容通过AMS媒资管理系统馈入BMS业务管理系统，BMS 系统将媒体文件注入到视
频服务器VOD Server，同时将资产注入到业务应用系统Application，业务应用系统进行节 目编排和服务绑定后再发布到互动节目导航系统IPG。用户通过导航界面来选择点播的节目，同时会话资源管理系统SRM 和BMS平台在后台工作以管理网络带宽，并与付费平台配合确定用户帐户的合法性。 在完整的广播电视业务体系中，媒资管理系统AMS和运营支撑系统BOSS分别作为生产系统和业务运营系统，往往由独立的厂商提供产品和客户化服务，为包括广播业务在内的所有业务提供支撑。而IP QAM则是网络设备产品，因此交互平台架构的核心组成包括： ◆视频服务系统VOD Server ◆业务管理系统BMS ◆会话和资源管理系统SRM ◆应用管理系统VOD Application ◆交互节目导航系统IPG 3、后台管理系统架构 目前主流的交互平台架构解决方案，有基于传统广电HFC网络的时代华纳ISA架构和基于IP宽带网络的IPTV标准规范，而尚未成熟应用的下一代交互电视架构NGOD则尝试吸收多种架构的优点。