PRL 106‚ 081101 (2011) Selected for a Viewpoint in Physics PHYSICAL REVIEW LETTERS week ending 25 FEBRUARY 2011 Rapid Cooling of the Neutron Star in Cassiopeia A Triggered by Neutron Superfluidity in Dense Matter Dany Page‚1 Madappa Prakash‚2 James M. Lattimer‚3 and Andrew W. Steiner4 ´ ´ ´ Instituto de Astronomıa‚ Universidad Nacional Autonoma de Mexico‚ Mexico D.F. 04510‚ Mexico 2 Department of Physics and Astronomy‚ Ohio University‚ Athens‚ Ohio 45701-2979‚ USA 3 Department of Physics and Astronomy
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Energy Efficient Buildings Internal Heat Gains and Design Heating & Cooling Loads Internal Heat Gains People and electrical equipment in buildings give off heat. These internal heat gains must be included in energy balances on the building or zone to determine the net heating or cooling load. Heat Gain From People Typical sensible‚ latent and total heat rates given off by people are shown in the table below (ASHRAE Fundamentals‚ 2005). The sensible heat gain results from radiation and
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Synopsis Major data centers need a large amount of energy to power and maintain. There are two costs components of energy at a data center: Cooling and running computers. The EPA estimated that data centers in the United States used about 12 gig watts of power‚ which is equal to the output of twenty-five major power plants in 2011. By 2020‚ in estimation‚ the world’s computer servers will either match or exceed the carbon emissions of the airline industry. Case Study Questions 1. PUE stands
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reduce temperature of inlet air. Several different inlet cooling methods are currently employed in various systems. The techniques of reheating‚ regenerating‚ inter cooling require installation of additional heavy machinery which is not economically feasible. Apart from these power augmentation techniques‚ which could be applied to existing gas turbines‚ can be divided into two main categories. The first category includes inlet air cooling technique and the second involves techniques based on injection
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Calculation Basis of Air Conditioning CO2 Emission 1 Burning 1 kg of standard coal produces about 2.93 kg of CO2 Type and producing area of the coal leads to the difference of heat value and carbon content. In China‚ usually the carbon content of coal is from 45% to 85%. In China‚ it is provided that the heat value of standard coal is 7‚000 Kcal/kg‚ carbon content is about 80%‚ CO2 emission of the 1 kg standard coal should be: molecular weight of CO2/ atomic weight for the element of C *
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in action in leaving things‚ they use sweat to low their temperature and also in many manmade tools. What is evaporation cooling? Evaporation cooling is a device that cools air by combining the natural process of water evaporation with an air moving system. Evaporative cooling is different from usual air conditioning method which use vapor-compression. Evaporation cooling works by employing waters large enthalpy of vaporization. Dry and hot air is pulled through very wet pads. The air gets moist
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Introduction 4 Brief History of Data Centers 4 1st Generation 4 2nd Generation 5 3rd Generation 5 4th Generation Data Center Design 5 Modularity 6 Energy Efficiency 6 Cooling Systems 7 Containerized Infrastructure Solutions 7 Modularity 8 Server Configuration 9 Networking 9 Power 10 Cooling 10 Procurement Considerations 11 Additional Considerations 14 The Future of Data Centers 15 Conclusion 16 Bibliography 17 Introduction New data centers are expected to
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water cooler that simulates underground temperature where the heat will be transferred to the ground. The coolant will then be recirculated back into a radiator. The inlet and outlet temperatures will be monitored to see if there is any significant cooling effect. If this project is successful‚ this may be employed as a low-energy air conditioning system that is good for the environment and does not waste energy and create excessive heat like regular air conditioners. Chapter I. INTRODUCTION
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AJAY KUMAR GARG ENGINEERING COLLEGE 27th km DELHI -HAPUR BY PASS ROAD GHAZIABAD -201009 A REPORT ON INDUSTRIAL TRAINING [pic] AT U.P POWER TRANSMISSION CORPN. LTD 132 KV SUB –STATION‚ GZB SUBMITTED BY SUBMITTED TO SARANG SAXENA Asstt. Prof. RAVINDER KUMAR EN-F DEPT. OF ELECTRICAL AND
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study the properties of materials to help choose the right kind of materials for a specific application. After material is chosen‚ one way to improve upon its properties is to apply heat treatment processes. A heat treatment involves rapid heating or cooling of a metal or alloy at extreme temperatures. For decades‚ engineers obtain desirable strength and hardness by austenitizing the steel and then quenching it to form martensitic structure. After fully converting to martensitic‚ steels are tempered to
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