Download or read book Waste Heat Recovery in Data Centers written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this thesis is to examine possible waste heat recovery methods in data centers. Predictions indicate that in the next decade data center racks may dissipate 70kW of heat, up from the current levels of 10-15kW. Due to this increase, solutions must be found to increase the efficiency of data center cooling. This thesis will examine possible waste heat recovery technologies which will improve energy efficiency. Possible approaches include phase change materials, thermoelectrics, thermomagnetics, vapor compression cycles, absorbtion and adsorbtion systems. After a thorough evaluation of the possible waste heat engines, the use of an ejector heat pump was evaluated in detail. The principle behind an ejector heat pump is very similar to a vapor compression cycle. However, the compressor is replaced with a pump, boiler and an ejector. These three components require less moving parts and are more cost effective then a comparable compressor, despite a lower efficiency. This system will be examined under general operating conditions in a data center. The heat load is around 15-20kW and air temperatures near 85°C. A parametric study is conducted to determine the viability and cost effectiveness of this system in the data center. Included will be various environmentally friendly working fluids that satisfy the low temperature ranges found in a data center. It is determined that Ammonia presents the best option as a working fluid for this application. Using this system a Coefficient Of Performance of 1.538 at 50°C can be realized. This will result in an estimated 373,000 kW-hr saved over a year and a $36,425 reduction in annual cost. Finally, recommendations for implementation are considered to allow for future design and testing of this viable waste heat recovery device.
Download or read book Data Center Handbook written by Hwaiyu Geng and published by John Wiley & Sons. This book was released on 2014-12-22 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the fundamentals, technologies, and best practices in designing, constructing and managing mission critical, energy efficient data centers Organizations in need of high-speed connectivity and nonstop systems operations depend upon data centers for a range of deployment solutions. A data center is a facility used to house computer systems and associated components, such as telecommunications and storage systems. It generally includes multiple power sources, redundant data communications connections, environmental controls (e.g., air conditioning, fire suppression) and security devices. With contributions from an international list of experts, The Data Center Handbook instructs readers to: Prepare strategic plan that includes location plan, site selection, roadmap and capacity planning Design and build "green" data centers, with mission critical and energy-efficient infrastructure Apply best practices to reduce energy consumption and carbon emissions Apply IT technologies such as cloud and virtualization Manage data centers in order to sustain operations with minimum costs Prepare and practice disaster reovery and business continuity plan The book imparts essential knowledge needed to implement data center design and construction, apply IT technologies, and continually improve data center operations.
Download or read book Energy and Sustainable Futures written by Iosif Mporas and published by Springer Nature. This book was released on 2021-04-29 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book presents papers displayed in the 2nd International Conference on Energy and Sustainable Futures (ICESF 2020), co-organised by the University of Hertfordshire and the University Alliance DTA in Energy. The research included in this book covers a wide range of topics in the areas of energy and sustainability including: • ICT and control of energy;• conventional energy sources;• energy governance;• materials in energy research;• renewable energy; and• energy storage. The book offers a holistic view of topics related to energy and sustainability, making it of interest to experts in the field, from industry and academia.
Download or read book Investigation of Waste Heat Recovery in Data Centers by the Thermoelectric Effect written by Lawrence Lewis and published by . This book was released on 2012 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Experimentation and Analysis of Data Center Waste Heat Recovery and Utilization written by Anna Haywood and published by . This book was released on 2014 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing computational demands in data centers require facilities to operate at higher ambient temperatures and at higher power densities. Conventionally, data centers are cooled with electrically-driven vapor-compressor equipment. This paper proposes an alternative data center cooling architecture that is heat-driven. The source is heat produced by the computer equipment. This dissertation details experiments investigating the quantity and quality of heat that can be captured from a liquid-cooled microprocessor on a computer server blade from a data center. The experiments involve four liquid-cooling setups and associated heat-extraction, including a radical approach using mineral oil. The trials examine the feasibility of using the thermal energy from a CPU to drive a cooling process. Uniquely, the investigation establishes an interesting and useful relationship simultaneously among CPU temperatures, power, and utilization levels. In response to the system data, this project explores the heat, temperature and power effects of adding insulation, varying water flow, CPU loading, and varying the cold plate-to-CPU clamping pressure. The idea is to provide an optimal and steady range of temperatures necessary for a chiller to operate. Results indicate an increasing relationship among CPU temperature, power and utilization. Since the dissipated heat can be captured and removed from the system for reuse elsewhere, the need for electricity-consuming computer fans is eliminated. Thermocouple readings of CPU temperatures as high as 93°C and a calculated CPU thermal energy up to 67Wth show a sufficiently high temperature and thermal energy to serve as the input temperature and heat medium input to an absorption chiller. This dissertation performs a detailed analysis of the exergy of a processor and determines the maximum amount of energy utilizable for work. Exergy as a source of realizable work is separated into its two contributing constituents: thermal exergy and informational exergy. The informational exergy is that usable form of work contained within the most fundamental unit of information output by a switching device within a CPU. Exergetic thermal, informational and efficiency values are calculated and plotted for our particular CPU, showing how the datasheet standards compare with experimental values. The dissertation concludes with a discussion of the work's significance.
Download or read book PUE written by and published by Ashrae. This book was released on 2014-01-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Simplifies the absorption and use of the PUE metric and allows executives to gain understanding of the concepts surrounding PUE, while providing application knowledge and resources to those implementing and reporting data center metrics"--
Download or read book Cooling and Heat Recovery of Data Centers written by Ahmad Alamir Sbaity and published by . This book was released on 2022 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study is to investigate passive and hybrid cooling, by performing heat recovery within a typical data center. The chosen cooling method is the thermosyphon loop, as it allows the transfer of high powers over a long distance. The chosen evaporator is a microchannel heat exchanger, the condenser is formed by finned tubes. An experimental parametric study is made by varying the fill ratio, the thermal power of the servers and the outside temperature of the air ensuring the cooling by natural convection. A second experimental study is done by cooling the condenser with water in forced convection. An annual numerical study on data centers in several cities in France is done to quantify the energy savings achieved with passive and hybrid cooling. The pPUE (partial power use efficiency) coefficient is calculated to evaluate the efficiency of the proposed cooling system. Finally, the thermosyphon loop is combined with a heat pump in order to recover heat from the data centers and distribute it. The energy savings of the proposed system are compared to the use of a boiler to heat a house. An economic study is made to calculate the payback period in several climates. The ERE (energy reuse efficiency) coefficient is also calculated to evaluate the capacity of the heat recovery system.
Download or read book Waste Heat Management Guidebook written by Kenneth G. Kreider and published by . This book was released on 1977 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Efficient Thermal Management of Data Centers written by Yogendra Joshi and published by Springer Science & Business Media. This book was released on 2012-03-20 with total page 635 pages. Available in PDF, EPUB and Kindle. Book excerpt: Energy Efficient Thermal Management of Data Centers examines energy flow in today's data centers. Particular focus is given to the state-of-the-art thermal management and thermal design approaches now being implemented across the multiple length scales involved. The impact of future trends in information technology hardware, and emerging software paradigms such as cloud computing and virtualization, on thermal management are also addressed. The book explores computational and experimental characterization approaches for determining temperature and air flow patterns within data centers. Thermodynamic analyses using the second law to improve energy efficiency are introduced and used in proposing improvements in cooling methodologies. Reduced-order modeling and robust multi-objective design of next generation data centers are discussed.
Download or read book Heat transfer in data centers volume II written by Chengbin Zhang and published by Frontiers Media SA. This book was released on 2023-03-24 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Concepts for Renewable Energy Supply of Data Centres written by Jaume Salom and published by CRC Press. This book was released on 2022-09-01 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid increase of cloud computing, high performance computing (HPC) and the vast growth in Internet and Social Media use have aroused the interest in energy consumption and the carbon footprint of Data Centres. Data Centres primarily contain electronic equipment used for data processing (servers), data storage (storage equipment), and communications (network equipment). Collectively, this equipment processes, stores, and transmits digital information and is known as information technology (IT) equipment. Advanced Concepts for Renewable Energy Supply of Data Centres introduces a number of technical solutions for the supply of power and cooling energy into Data Centres with enhanced utilisation of renewable energy sources in order to achieve low energy Data Centres. Because of the high energy density nature of these unique infrastructures, it is essential to implement energy efficiency measures and reduce consumption before introducing any renewable energy source. A holistic approach is used with the objective of integrating many technical solutions such as management of the IT (Information Technology) load, efficient electrical supply to the IT systems, Low-Ex air-conditioning systems, interaction with district heating and cooling networks, re-use of heat, free cooling (air, seawater, groundwater), optimal use of heat and cold storage, electrical storage and integration in smart grids. This book is therefore a catalogue of advanced technical concepts that could be integrated into Data Centres portfolio in order to increase the overall efficiency and the share of renewable energies in power and cooling supply. Based on dynamic energy models implemented in TRNSYS some concepts are deeply evaluated through yearly simulations. The results of the simulation are illustrated with Sankey charts, where the energy flows per year within the subsystems of each concept for a selected scenario are shown, and graphs showing the results of parametric analysis. A set of environmental metrics (as the non-renewable primary energy) and financial metrics (CAPEX and OPEX) as well of energy efficiency metrics like the well-known PUE, are described and used to evaluate the different technical concepts.
Download or read book Best Practices for Datacom Facility Energy Efficiency written by and published by American Society of Heating Refrigerating and Air-Conditioning Engineers. This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable design, global warming, depleting fuel reserves, energy use, and operating cost are becoming increasingly more important. These issues are even more important in datacom equipment centers for reasons such as: Large, concentrated use of energy (can be 100 times the watts per square foot of an office building). 24/7 operations have about three times the annual operating hours as other commercial properties. The intent of this publication is to provide the reader with detailed information on the design of datacom facilities that will aid in minimizing the life-cycle cost to the client and to maximize energy efficiency in a facility to align with ASHRAE's stated direction to lead the advancement of sustainable building design and operations.This book covers many aspects of datacom facility energy efficiency, including chapters on the topics of environmental criteria, mechanical equipment and systems, economizer cycles, airflow distribution, HVAC controls and energy management, electrical distribution equipment, datacom equipment efficiency, liquid cooling, total cost of ownership, and emerging technologies. There are also appendices on such topics as facility commissioning, operations and maintenance, and telecom facility experiences. The primary changes for this second edition center on the updated environmental envelope and relate to the recommended temperatures at the inlets of the equipment operating in datacom facilities. This book is the sixth in the ASHRAE Datacom Series, authored by ASHRAE Technical Committee 9.9, Mission Critical Facilities, Technology Spaces and Electronic Equipment. This series provides comprehensive treatment of datacom cooling and related subjects.
Download or read book Experimental Determination of the Feasibility of Waste Heat Recovery in Data Centers Using Ejector Based Refrigeration written by Joshua Glenn Sharp and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this thesis is to experimentally determine the feasibility of an ejector based, waste heat recovery driven refrigeration system applied to the data center environment in order to reduce operational cooling costs. A comprehensive literature review is detailed to determine the current state of the ejector refrigeration research and assess the initial direction of this thesis. A simplified model was created to perform preliminary performance estimations and system sizing before constructing an experimental system apparatus to evaluate the model predictions. The pressures and temperatures used in the model and instituted in the experimental system are based on the maximum temperatures typically observed in computing servers (50-75°C). Precision controlled heaters are used to simulate the computer server heat, and R245fa is used as the working fluid. Performance results ranged from 0.06 to 0.13.
Download or read book Administering Data Centers written by Kailash Jayaswal and published by John Wiley & Sons. This book was released on 2005-10-28 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book covers a wide spectrum of topics relevant to implementing and managing a modern data center. The chapters are comprehensive and the flow of concepts is easy to understand." -Cisco reviewer Gain a practical knowledge of data center concepts To create a well-designed data center (including storage and network architecture, VoIP implementation, and server consolidation) you must understand a variety of key concepts and technologies. This book explains those factors in a way that smoothes the path to implementation and management. Whether you need an introduction to the technologies, a refresher course for IT managers and data center personnel, or an additional resource for advanced study, you'll find these guidelines and solutions provide a solid foundation for building reliable designs and secure data center policies. * Understand the common causes and high costs of service outages * Learn how to measure high availability and achieve maximum levels * Design a data center using optimum physical, environmental, and technological elements * Explore a modular design for cabling, Points of Distribution, and WAN connections from ISPs * See what must be considered when consolidating data center resources * Expand your knowledge of best practices and security * Create a data center environment that is user- and manager-friendly * Learn how high availability, clustering, and disaster recovery solutions can be deployed to protect critical information * Find out how to use a single network infrastructure for IP data, voice, and storage
Download or read book ICT Energy Concepts for Energy Efficiency and Sustainability written by Giorgos Fagas and published by BoD – Books on Demand. This book was released on 2017-03-22 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a previous volume (ICT-Energy-Concepts Towards Zero-Power ICT; referenced below as Vol. 1), we addressed some of the fundamentals related to bridging the gap between the amount of energy required to operate portable/mobile ICT systems and the amount of energy available from ambient sources. The only viable solution appears to be to attack the gap from both sides, i.e. to reduce the amount of energy dissipated during computation and to improve the efficiency in energy-harvesting technologies. In this book, we build on those concepts and continue the discussion on energy efficiency and sustainability by addressing the minimisation of energy consumption at different levels across the ICT system stack, from hardware to software, as well as discussing energy consumption issues in high-performance computing (HPC), data centres and communication in sensor networks. This book was realised thanks to the contribution of the project ‘Coordinating Research Efforts of the ICT-Energy Community’ funded from the European Union under the Future and Emerging Technologies (FET) area of the Seventh Framework Programme for Research and Technological Development (grant agreement n. 611004).
Download or read book An Introduction to Energy Efficiency for Data Centers written by J. Paul Guyer, P.E., R.A. and published by Guyer Partners. This book was released on 2019-07-11 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introductory technical guidance for mechanical and electrical engineers and construction managers interested in improved energy efficiency for electronic data centers. Here is what is discussed: 1. INTRODUCTION 2. INFORMATION TECHNOLOGY (IT) SYSTEMS 3. ENVIRONMENTAL CONDITIONS 4. AIR MANAGEMENT 5. COOLING SYSTEMS 6. ELECTRICAL SYSTEMS 7. OTHER OPPORTUNITIES FOR ENERGY-EFFICIENT DESIGN 8. DATA CENTER METRICS AND BENCHMARKING.
Download or read book The Compost Powered Water Heater How to Heat Your Greenhouse Pool Or Buildings with Only Compost written by Gaelan Brown and published by The Countryman Press. This book was released on 2014-05-05 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: It seems almost too good to be true: make high-value organic compost while generating reliable combustion-free heat. But it works, and this book is your practical introduction. With detailed plans for constructing small DIY systems, step-by-step illustrations and photos to guide you through the process, and calculations to help you estimate the heating capabilities of various approaches, this book will be invaluable.
