Heat exchangers are essential in a wide range of engineering applications, including power plants, automobiles, airplanes, process and chemical industries, and heating, air conditioning and refrigeration systems. Revised and updated with new problem sets and examples, Heat Exchangers: Selection, Rating, and Thermal Design, Third Edition presents a systematic treatment of the various types of heat exchangers, focusing on selection, thermal-hydraulic design, and rating. Topics discussed include: Classification of heat exchangers according to different criteria Basic design methods for sizing and rating of heat exchangers Single-phase forced convection correlations in channels Pressure drop and pumping power for heat exchangers and their piping circuit Design solutions for heat exchangers subject to fouling Double-pipe heat exchanger design methods Correlations for the design of two-phase flow heat exchangers Thermal design methods and processes for shell-and-tube, compact, and gasketed-plate heat exchangers Thermal design of condensers and evaporators This third edition contains two new chapters. Micro/Nano Heat Transfer explores the thermal design fundamentals for microscale heat exchangers and the enhancement heat transfer for applications to heat exchanger design with nanofluids. It also examines single-phase forced convection correlations as well as flow friction factors for microchannel flows for heat transfer and pumping power calculations. Polymer Heat Exchangers introduces an alternative design option for applications hindered by the operating limitations of metallic heat exchangers. The appendices provide the thermophysical properties of various fluids. Each chapter contains examples illustrating thermal design methods and procedures and relevant nomenclature. End-of-chapter problems enable students to test their assimilation of the material.
Selections from nearly thirty years of teachings by one of the principal students of Gurdjieff. ´´Exchanges Within´´ concentrates on one main question: How do we find within ourselves what we have lost-our reality, wholeness, and significance-as the human kind of being in the universe? Through the intensity of his own search, John Pentland radiated the help necessary for group members again and again to discover and try to express where they actually are in the process of understanding and in the movement toward ´´being.´´ The ´´exchanges´´ in ´´Exchanges Within´´ provide a glimpse into the dynamics of a living teaching and reflect genuine efforts toward the discovery and practice of meaningful living in the face of forces that drain human life of the sacred.
Demonstrating that similarities between Jewish and Christian art in the Middle Ages were more than coincidental, Cultural Exchange meticulously combines a wide range of sources to show how Jews and Christians exchanged artistic and material culture. Joseph Shatzmiller focuses on communities in northern Europe, Iberia, and other Mediterranean societies where Jews and Christians coexisted for centuries, and he synthesizes the most current research to describe the daily encounters that enabled both societies to appreciate common artistic values.Detailing the transmission of cultural sensibilities in the medieval money market and the world of Jewish money lenders, this book examines objects pawned by peasants and humble citizens, sacred relics exchanged by the clergy as security for loans, and aesthetic goods given up by the Christian well-to-do who required financial assistance. The work also explores frescoes and decorations likely painted by non-Jews in medieval and early modern Jewish homes located in Germanic lands, and the ways in which Jews hired Christian artists and craftsmen to decorate Hebrew prayer books and create liturgical objects. Conversely, Christians frequently hired Jewish craftsmen to produce liturgical objects used in Christian churches.With rich archival documentation, Cultural Exchange sheds light on the social and economic history of the creation of Jewish and Christian art, and expands the general understanding of cultural exchange in brand-new ways.
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Microsoft Exchange is a big, complicated application; it requires more disk storage than Windows NT Server and has several hundred configuration property pages and dialogs. But it is also a very powerful and flexible messaging system. However, knowing that it can be made to do something and understanding how to do it are often worlds apart. Managing Microsoft Exchange Server bridges this gap. This book is a no-nonsense, practical guide to planning, installing, managing, maintaining, and troubleshooting Exchange networks. Targeted at medium-sized installations and up, Managing Microsoft Exchange Server addresses the difficult problems these users face: Internet integration, storage management, cost of ownership, system security, and performance management. It goes beyond the basics to provide real hands-on advice about what you need to know after you have your first site up-and-running and are facing issues of growth, optimization, or recovery planning. Managing Microsoft Exchange Server comprehensively explains how Exchange works, what it can do, and how you can make it work for you.
Ask network administrators what their most critical computer application is, and most will say ´´email´´ without a moment´s hesitation. If you run a network powered by Windows 2000 or Windows Server 2003, Microsoft Exchange occupies much of your time. According to Microsoft, 110 million Exchange seats have been deployed, but 60% of you are still running Exchange 5.5. That´s a problem, because the difference between version 5.5 and the more efficient Exchange 2000 and Exchange Server 2003 is profound. Don´t fret. Exchange Server Cookbook offers you a comprehensive how-to guide to these newer versions of Exchange. You´ll find quick solutions for the most common tasks you need to perform--everything from installation and maintenance to configuration and optimization, with proven recipes for the most useful tools and utilities. The book also has solutions to some uncommon tasks (that you may not know are possible) and advanced procedures that aren´t part of day-to-day operations. These include tasks for critical situations, such as using a recovery storage group. Our reliable desktop reference even shows you how to write scripts for Exchange management and deployment tasks. That´s right. While not every Exchange job can be scripted, many can, and we provide lots of working VBScript examples for accomplishing particular goals. Whatever your particular need, you´ll find it quickly, because chapters in this Cookbook are laid out by recipe, with cross references to other pertinent solutions in the book. With this guide, you´ll learn: * The relationship between Exchange and Active Directory * When to use the GUI, the command line, or scripting * How to prepare forests, domains, and servers * How to use Group Policy to control Exchange * Diagnostic logging, measure performance, and administrative privileges * Recipient management: user accounts, mailboxes, mail-enabled groups * Mailbox and public folder database management * Message routing and transport functions * Security, backup, restore, and recovery operations For every question you have about Exchange 2000 or Exchange Server 2003, our Cookbook has the answer--one that you can find and implement without a moment´s hesitation.
In finance, the exchange rates between two currencies specifies how much one currency is worth in terms of the other. This book presents topical research on the policies, effects and fluctuations of exchange rates.