By Sergio Ferreira / Published on Mon, 2010-02-22 17:19
This analysis builds on the previously released Qualitative Analysis of Power Distribution Configurations For Data Centres. It takes a quantitative look at one aspect of the previous paper: efficiency.
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By Sergio Ferreira / Published on Mon, 2010-02-22 17:08
This paper is courtesy of The Green Grid - Get connected to Efficient IT.
Many different power distribution configurations exist today that can be used to power a data centre. Each of these configurations has its own advantages and disadvantages, which can have a major impact on all aspects of the facility.
This paper discusses the qualitative differences between seven possible configurations that can either be found in the United States or Canada today, or could be used in the future.
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By Fernando Nuno / Published on Fri, 2010-02-19 12:08
Following the training course on electricity markets regulation, a set of support papers is being delivered to complete the didactic set.
This paper explains the various market design possibilities: Single Buyer or Electricity Markets with Wholesale Competition. Additionally, it provides a view about Pool versus Bilateral Trading, Intra-day Trading and Balancing Mechanisms and Supplementary Capacity Schemes.
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By HDK / Published on Fri, 2010-01-15 16:35
This paper describes the performance of the network of a typical future residential concept area, as has been studied in the Intelligent E-Transportation Management project. Several scenarios have been elaborated by load flow simulations. The study investigated what level of introduction of electric vehicles, heat pumps, photovoltaic systems and micro combined heat and power plants is feasible in this network. Possible overload situations are examined and the opportunities of demand side management for the power grid are investigated.
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By Guy Kasier / Published on Mon, 2009-12-14 14:23
The technical aids to enable elderly people to live at home for longer do not differ so much from those that can be used to help dementia sufferers and their home carers in the home situation. The difference lies primarily with the videophone (although this could also improve social contact for non-dementia sufferers) and the GPS wandering detection techniques. In a home situation with a dementia sufferer, the emphasis is primarily on offering support to the carer, who may or may not live in the home.
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By Guy Kasier / Published on Wed, 2009-10-21 14:19
Once an electrical installation had been installed in a home in the past, that was it. So, when a domestic electrical installation was fitted, it was and in a many cases still is considered to be an unmodifiable fixture. In fact, it has always been quite difficult to make any changes to a classical electrical appliance once it is installed. Fortunately the arrival of integrated home systems means that such flexibility is now available to us (see: Definition of integrated home systems), even if the communications aspect (see: Increasing communication) is, admittedly, still in its infancy.
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By Hans De Keulenaer / Published on Wed, 2009-09-09 11:54
This document is an overall report of the seminar “Electricity in the next decade”, the first in an annual series of events regarding “Low carbon electricity systems”. KEMA, ECI and Leonardo ENERGY are jointly organising these events.
Next to the topics presented during the first event, a few additional topics have been added in order to create a white paper and a more complete picture on the theme “Electricity in the next decade”.
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By Peter Vaessen / Published on Tue, 2009-09-08 07:04
An option when there is no alternative
It is clear that wireless power transmission systems in the range of 100 W to 100 kW cannot compete with traditional systems just looking at the costs. At places where economic competition is not the prime consideration, it can be an option. Microwave wireless power transmission can supply power to places that are difficult to reach. Especially small communities in rural areas could be supplied with power using WPT.
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By Sarah Hatch / Published on Tue, 2009-09-01 10:33
A task of the IEA 4E EMSA Project - The International Energy Agency (IEA) Implementing Agreement for a Co-operating Programme on Efficient Electrical End-Use Equipment (4E) was set up in 2008 and is currently supported by around 12 countries. A new Electric Motor Systems Annex (EMSA) was launched at the end of 2008 and is made up of a number of Tasks.
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By Stefan Fassbinder / Published on Mon, 2009-08-31 08:33
Why do we need transformers? The answer is simple: impedance. If power losses in electricity distribution networks are to be kept within reasonable limits, then large amounts of electric power have to be transmitted across long distances at the highest feasible voltage. In absolute terms, the higher the trans-mission voltage, the smaller the current and hence the smaller the (resistive) power losses in the transmission cables. But increasing the transmission voltage also reduces a given power loss in relative terms.
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By Guy Kasier / Published on Wed, 2009-07-15 09:42
A WelHops study some years ago assessed the needs of the elderly regarding the buildings and surroundings in which they wish to live. Still as relevant today as it was when it was carried out, this study ran from May 2005 to September 2007 as part of a European INTERREG IIIC project. Taking part were partners from Italy, Sweden, the UK, Spain, and Hungary.
The project objectives were to: -
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By Sergio Ferreira / Published on Thu, 2009-05-14 07:53
This PhD Thesis Report is courtesy of Joseph Michael Marriott, Carnegie Mellon University
The electricity industry is extremely important to both our economy and our environment: we would like to examine the economic, environmental and policy implications of both future electricity technologies and the interaction of this industry with the rest of the economy. However, the tools which currently exist to analyse the potential impacts are either too complex or too aggregated to provide this type of information.
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By Sergio Ferreira / Published on Tue, 2009-05-05 08:37
This is an update to the very first white paper published by the Green Grid in February 2007 called “Green Grid Metrics: Describing Data Center Power Efficiency” to refine the nomenclature and intent of that paper. In that paper, The Green Grid proposed the use of Power Usage Effectiveness (PUE) and its reciprocal, Datacenter Efficiency (DCE) metrics, which enable datacenter operators to quickly estimate the energy efficiency of their datacenters, compare the results against other datacenters, and determine if any energy efficiency improvements need to be made.
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By Hans De Keulenaer / Published on Tue, 2009-04-21 18:02
Cables are important components in the transportation and distribution of electricity. Due to the increased need for power, but also because overhead power lines are often replaced by (underground) power cables in densely populated areas, the importance of power cables has grown over the years.
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By Hans De Keulenaer / Published on Mon, 2009-04-13 10:36
The evolutionary path of the U.S. electricity grid is at an historical crossroad. Decisions are going to be made about the direction of grid development so that it can meet extraordinary economic challenges, critical needs for energy security, and essential requirements for a sustainable way of life. This is a defining moment in terms of our nation’s commitment to providing an electric energy system, including the bulk transmission network, that meets societal needs of the 21st century and beyond.
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By Sergio Ferreira / Published on Wed, 2009-03-18 11:48
This Paper Courtesy: The Green Grid - Get connected to Efficient IT
Previously, The Green Grid published a white paper entitled “The Green Grid Metrics: Describing Data Center Power Efficiency”. The white paper discussed the need for a finite number of industry-accepted metrics that describe the effectiveness and efficiency of data centers around the world. The white paper also provided an overview of a proposed metric called the “Data Center infrastructure Efficiency” (DCiE).
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By Hans De Keulenaer / Published on Wed, 2009-02-25 17:33
The use of electronic loads is increasing very fast. The gap between demand and the short generation is also increasing very fast. These have made the power quality, reliability and stability a critical issue. Further, there is continuous thrust on optimal utilization of the non-conventional energy resources due to price rise of oil and environmental issues, in addition to the fact that the central power station with improved quality of power has made it necessary to use the energy storage technology.
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By Sergio Ferreira / Published on Fri, 2009-02-06 10:06
Mandatory Energy Performance Standards (MEPS) are now being proposed for Electric Motors. To assist that process, this guide has been put forward under the IEA 4E - Electric Motor Systems Annex Project.
The purpose of the guide is to inform on new standards for electric motors that will facilitate trade of high efficient motors across the globe.
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By Sergio Ferreira / Published on Wed, 2009-02-04 11:29
The Green Grid is an association of IT professionals seeking to raise the energy efficiency of datacenters through a series of short-term and longterm proposals. For the short term, The Green Grid is proposing the use of Power Usage Effectiveness (PUE) and Datacenter Efficiency (DCE) metrics, which enable datacenter operators to quickly estimate the energy efficiency of their datacenters, compare the results against other datacenters, and determine if any energy efficiency improvements need to be made.
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