Climate protection needs energy efficient data centers - Stulz GmbH

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Climate protection needs energy efficient data centers• A message from Federal Environment Minister Sigmar Gabrielmade to improve energy efficiency in this area, then datacenter energy consumption is predicted to rise to 11.1 TWhby 2010. That means that, by 2010, the CO2 emissionscaused by German data centers would rise by approx.50 per cent as compared with 2001.The scale of these figures demonstrates the majorsignificance of energy efficient data centers for climateprotection.This is a highly relevant topic for manufacturers and usersof IT hardware and software, because dwindling resourcesmean that cost pressure often directly influences productprices, competitiveness and thus locational and job security,too.We should make it our common goal to show how thesechallenges can be transformed into positive synergies forimproving resource efficiency, protecting natural resources,lowering costs, generating innovation, saving jobsand creating new ones. New technological solutions andinnovations are called for if we are to meet these economicand ecological challenges.Sigmar Gabriel, Federal Minister for the Environment,Nature Conservation and Nuclear SafetyIn the face of the steady increase in the use of moderninformation and communication technology and theinternet, improving the energy efficiency of our data centersis an important contribution to climate protection.Servers and data centers are among the fastest-growingenergy consumers within the sector. Experts estimatethat in 2006 the electricity consumption of Germany’sroughly 50 000 data centers amounted to 8.67 TWh. Thatis the equivalent of the annual power output of threemedium-sized coal-fired power stations. If no efforts areThis guide is an important tool in helping us to reach thisgoal. It points out clearly and concisely the various differentpractical approaches: cooling strategies for improvingdata center energy efficiency, for example. It will helpyou to implement improvement measures quickly andeffectively, for the benefit of both the climate and yourown pocket.2
Energy Efficiency in the Data CenterContentWelcome 2Foreword 41 Introduction 52 Developments in Data Center Energy Requirements 62.1 Overview 62.2 Energy consumers in the data center 62.3 Challenges for the planning and operation of data centers 73 Measuring Energy Consumption and Temperatures in the Data Center 83.1 Overview 83.2 Energy monitoring 93.3 Temperature monitoring 94 IT Hardware and Software Optimization 104.1 Overview 104.2 Servers 104.3 Storage solutions 125 Cooling Optimization 135.1 Overview 135.2 Air flow in the room and in the rack 135.3 Power management 165.4 Free cooling 195.5 Chilled water temperature 215.6 The different types of cooling unit 215.7 Different cooling media 225.8 Return air temperature 246 Optimizing the Energy Supply 256.1 Overview 256.2 The impact of UPS systems on data center energy consumption 256.3 Safe, energy-efficient UPS topology 276.4 Redundancy: security and efficiency 286.5 Load characteristics, performance category and semiconductor components 306.6 Current developments in UPS efficiency 316.7 Balancing energy efficiency, security and quality 336.8 Rackmount intelligent power strips 337 Energy Contracting 36Endnotes 378 Glossary 3810 Acknowledgements 393
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